Asp.net中GridView使用详解
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2022-05-01 17:52:36
lgridview无代码分页排序
lgridview选中，编辑，取消，删除
lgridview正反双向排序
lgridview和下拉菜单dropdownlist结合
lgridview和checkb...
lgridview无代码分页排序
lgridview选中，编辑，取消，删除
lgridview正反双向排序
lgridview和下拉菜单dropdownlist结合
lgridview和checkbox结合
l鼠标移到gridview某一行时改变该行的背景色方法一
l鼠标移到gridview某一行时改变该行的背景色方法二
lgridview实现删除时弹出确认对话框
lgridview实现自动编号
lgridview实现自定义时间货币等字符串格式
lgridview实现用“...”代替超长字符串
lgridview一般换行与强制换行
lgridview显示隐藏某一列
lgridview弹出新页面/弹出新窗口
lgridview固定表头(不用javascript只用css，2行代码，很好用)
lgridview合并表头多重表头无错完美版（以合并3列3行举例）
lgridview突出显示某一单元格（例如金额低于多少，分数不及格等）
lgridview加入自动求和求平均值小计
lgridview数据导入excel/excel数据读入gridview
1.gridview简单代码分页排序：
1.allowsorting设为true，x代码中是allowsorting="true"；
2.默认1页10条，如果要修改每页条数，修改pagesize即可，在aspx代码中是pagesize="12"。
3.默认的是单向排序的，右击gridview弹出“属性”，选择allowsorting为true即可。
4.添加代码:
protected void gridview1_pageindexchanging(object sender, gridviewpageeventargs e)
{
gridview1.pageindex = e.newpageindex;
bind();
}
2.gridview选中，编辑，取消，删除：
后台代码：
using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
public partial class _default : system.web.ui.page
{
sqlconnection sqlcon;
sqlcommand sqlcom;
string strcon = "data source=(local);database=数据库名;uid=帐号;pwd=密码";
protected void page_load(object sender, eventargs e)
{
if (!ispostback)
{
bind();
}
}
protected void gridview1_rowediting(object sender, gridviewediteventargs e)
{
gridview1.editindex = e.neweditindex;
bind();
}
//删除
protected void gridview1_rowdeleting(object sender, gridviewdeleteeventargs e)
{
string sqlstr = "delete from 表 where id='" + gridview1.datakeys[e.rowindex].value.tostring() + "'";
sqlcon = new sqlconnection(strcon);
sqlcom = new sqlcommand(sqlstr,sqlcon);
sqlcon.open();
sqlcom.executenonquery();
sqlcon.close();
bind();
}
//更新
protected void gridview1_rowupdating(object sender, gridviewupdateeventargs e)
{
sqlcon = new sqlconnection(strcon);
string sqlstr = "update 表 set 字段1='"
+ ((textbox)(gridview1.rows[e.rowindex].cells[1].controls[0])).text.tostring().trim() + "',字段2='"
+ ((textbox)(gridview1.rows[e.rowindex].cells[2].controls[0])).text.tostring().trim() + "',字段3='"
+ ((textbox)(gridview1.rows[e.rowindex].cells[3].controls[0])).text.tostring().trim() + "' where id='"
+ gridview1.datakeys[e.rowindex].value.tostring() + "'";
sqlcom=new sqlcommand(sqlstr,sqlcon);
sqlcon.open();
sqlcom.executenonquery();
sqlcon.close();
gridview1.editindex = -1;
bind();
}
//取消
protected void gridview1_rowcancelingedit(object sender, gridviewcancelediteventargs e)
{
gridview1.editindex = -1;
bind();
}
//绑定
public void bind()
{
string sqlstr = "select * from 表";
sqlcon = new sqlconnection(strcon);
sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
dataset myds = new dataset();
sqlcon.open();
myda.fill(myds, "表");
gridview1.datasource = myds;
gridview1.datakeynames = new string[] { "id" };//主键
gridview1.databind();
sqlcon.close();
}
}
前台主要代码：
<asp:gridview id="gridview1" runat="server" autogeneratecolumns="false" cellpadding="4" forecolor="#333333" gridlines="none" data-cke-pa-onrowdeleting="gridview1_rowdeleting" data-cke-pa-onrowediting="gridview1_rowediting" data-cke-pa-onrowupdating="gridview1_rowupdating" data-cke-pa-onrowcancelingedit="gridview1_rowcancelingedit">
<footerstyle backcolor="#990000" font-bold="true" forecolor="white">
<columns>
<asp:boundfield datafield="身份证号码" headertext="用户id" readonly="true">
<asp:boundfield datafield="姓名" headertext="用户姓名">
<asp:boundfield datafield="员工性别" headertext="性别">
<asp:boundfield datafield="家庭住址" headertext="家庭住址">
<asp:commandfield headertext="选择" showselectbutton="true">
<asp:commandfield headertext="编辑" showeditbutton="true">
<asp:commandfield headertext="删除" showdeletebutton="true">
</asp:commandfield></asp:commandfield></asp:commandfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns>
<rowstyle forecolor="#000066">
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
<headerstyle backcolor="#006699" font-bold="true" forecolor="white">
</headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>
3.gridview正反双向排序：
后台代码：
using system;
using system.data;
using system.configuration;
using system.collections;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
public partial class default3 : system.web.ui.page
{ sqlconnection sqlcon;
string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=";
protected void page_load(object sender, eventargs e)
{
if (!ispostback)
{
viewstate["sortorder"] = "身份证号码";
viewstate["orderdire"] = "asc";
bind();
}
}
protected void gridview1_sorting(object sender, gridviewsorteventargs e)
{
string spage = e.sortexpression;
if (viewstate["sortorder"].tostring() == spage)
{
if (viewstate["orderdire"].tostring() == "desc")
viewstate["orderdire"] = "asc";
else
viewstate["orderdire"] = "desc";
}
else
{
viewstate["sortorder"] = e.sortexpression;
}
bind();
}
public void bind()
{
string sqlstr = "select top 5 * from 飞狐工作室";
sqlcon = new sqlconnection(strcon);
sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
dataset myds = new dataset();
sqlcon.open();
myda.fill(myds, "飞狐工作室");
dataview view = myds.tables["飞狐工作室"].defaultview;
string sort = (string)viewstate["sortorder"] + " " + (string)viewstate["orderdire"];
view.sort = sort;
gridview1.datasource = view;
gridview1.databind();
sqlcon.close();
}
}
前台主要代码：
<asp:gridview id="gridview1" runat="server" allowsorting="true" autogeneratecolumns="false" cellpadding="3" font-size="9pt" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" data-cke-pa-onsorting="gridview1_sorting">
<footerstyle backcolor="white" forecolor="#000066">
<columns>
<asp:boundfield datafield="身份证号码" headertext="用户id" sortexpression="身份证号码">
<asp:boundfield datafield="姓名" headertext="用户姓名" sortexpression="姓名">
<asp:boundfield datafield="员工性别" headertext="性别" sortexpression="员工性别">
<asp:boundfield datafield="家庭住址" headertext="家庭住址" sortexpression="家庭住址">
</asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns>
<rowstyle forecolor="#000066">
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
<headerstyle backcolor="#006699" font-bold="true" forecolor="white">
</headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>
4.gridview和下拉菜单dropdownlist结合：
后台代码：
using system;
using system.data;
using system.configuration;
using system.collections;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
public partial class default4 : system.web.ui.page
{
sqlconnection sqlcon;
string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=sa";
protected void page_load(object sender, eventargs e)
{
dropdownlist ddl;
if (!ispostback)
{
string sqlstr = "select top 5 * from 飞狐工作室";
sqlcon = new sqlconnection(strcon);
sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
dataset myds = new dataset();
sqlcon.open();
myda.fill(myds, "飞狐工作室");
gridview1.datasource = myds;
gridview1.databind();
for (int i = 0; i <= gridview1.rows.count - 1; i++)
{
datarowview mydrv = myds.tables["飞狐工作室"].defaultview[i];
if (convert.tostring(mydrv["员工性别"]).trim() == "true")
{
ddl = (dropdownlist)gridview1.rows[i].findcontrol("dropdownlist1");
ddl.selectedindex = 0;
}
if (convert.tostring(mydrv["员工性别"]).trim() == "false")
{
ddl = (dropdownlist)gridview1.rows[i].findcontrol("dropdownlist1");
ddl.selectedindex = 1;
}
}
sqlcon.close();
}
}
public sqldatareader ddlbind()
{
string sqlstr = "select distinct 员工性别 from 飞狐工作室";
sqlcon = new sqlconnection(strcon);
sqlcommand sqlcom = new sqlcommand(sqlstr, sqlcon);
sqlcon.open();
return sqlcom.executereader();
}
前台主要代码：
<asp:gridview id="gridview1" runat="server" allowsorting="true" autogeneratecolumns="false" cellpadding="3" font-size="9pt" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px">
<footerstyle backcolor="white" forecolor="#000066">
<columns>
<asp:boundfield datafield="身份证号码" headertext="用户id" sortexpression="身份证号码">
<asp:boundfield datafield="姓名" headertext="用户姓名" sortexpression="姓名">
<asp:templatefield headertext="员工性别">
<itemtemplate>
<asp:dropdownlist id="dropdownlist1" runat="server" datasource="'<%#">' datavaluefield="员工性别" datatextfield="员工性别">
</asp:dropdownlist>
</itemtemplate>
</asp:templatefield>
<asp:boundfield datafield="家庭住址" headertext="家庭住址" sortexpression="家庭住址">
</asp:boundfield></asp:boundfield></asp:boundfield></columns>
<rowstyle forecolor="#000066">
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
<headerstyle backcolor="#006699" font-bold="true" forecolor="white">
</headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>
5.gridview和checkbox结合：
后台代码：
using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
public partial class default5 : system.web.ui.page
{
sqlconnection sqlcon;
string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=sa";
protected void page_load(object sender, eventargs e)
{
if (!ispostback)
{
bind();
}
}
protected void checkbox2_checkedchanged(object sender, eventargs e)
{
for (int i = 0; i <= gridview1.rows.count - 1; i++)
{
checkbox cbox = (checkbox)gridview1.rows[i].findcontrol("checkbox1");
if (checkbox2.checked == true)
{
cbox.checked = true;
}
else
{
cbox.checked = false;
}
}
}
protected void button2_click(object sender, eventargs e)
{
sqlcon = new sqlconnection(strcon);
sqlcommand sqlcom;
for (int i = 0; i <= gridview1.rows.count - 1; i++)
{
checkbox cbox = (checkbox)gridview1.rows[i].findcontrol("checkbox1");
if (cbox.checked == true)
{
string sqlstr = "delete from 飞狐工作室 where 身份证号码='" + gridview1.datakeys[i].value + "'";
sqlcom = new sqlcommand(sqlstr, sqlcon);
sqlcon.open();
sqlcom.executenonquery();
sqlcon.close();
}
}
bind();
}
protected void button1_click(object sender, eventargs e)
{
checkbox2.checked = false;
for (int i = 0; i <= gridview1.rows.count - 1; i++)
{
checkbox cbox = (checkbox)gridview1.rows[i].findcontrol("checkbox1");
cbox.checked = false;
}
}
public void bind()
{
string sqlstr = "select top 5 * from 飞狐工作室";
sqlcon = new sqlconnection(strcon);
sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
dataset myds = new dataset();
sqlcon.open();
myda.fill(myds, "tb_member");
gridview1.datasource = myds;
gridview1.datakeynames = new string[] { "身份证号码" };
gridview1.databind();
sqlcon.close();
}
}
前台主要代码：
<asp:gridview id="gridview1" runat="server" allowsorting="true" autogeneratecolumns="false" cellpadding="3" font-size="9pt" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px">
<footerstyle backcolor="white" forecolor="#000066">
<columns>
<asp:templatefield>
<itemtemplate>
<asp:checkbox id="checkbox1" runat="server">
</asp:checkbox></itemtemplate>
</asp:templatefield>
<asp:boundfield datafield="身份证号码" headertext="用户id" sortexpression="身份证号码">
<asp:boundfield datafield="姓名" headertext="用户姓名" sortexpression="姓名">
<asp:boundfield datafield="家庭住址" headertext="家庭住址" sortexpression="家庭住址">
</asp:boundfield></asp:boundfield></asp:boundfield></columns>
<rowstyle forecolor="#000066">
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
<headerstyle backcolor="#006699" font-bold="true" forecolor="white">
</headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>
<asp:checkbox id="checkbox2" runat="server" autopostback="true" font-size="9pt" text="全选" data-cke-pa-oncheckedchanged="checkbox2_checkedchanged">
<asp:button id="button1" runat="server" font-size="9pt" text="取消" data-cke-pa-onclick="button1_click">
<asp:button id="button2" runat="server" font-size="9pt" text="删除" data-cke-pa-onclick="button2_click"></asp:button></asp:button></asp:checkbox>
6.鼠标移到gridview某一行时改变该行的背景色方法一：
做法：
双击gridview的onrowdatabound事件；
在后台的gridview1_rowdatabound()方法添加代码，最后代码如下所示：
protected void gridview1_rowdatabound(object sender, gridviewroweventargs e)
{
//首先判断是否是数据行
if (e.row.rowtype == datacontrolrowtype.datarow)
{
//当鼠标停留时更改背景色
e.row.attributes.add("onmouseover", "c=this.style.backgroundcolor;this.style.backgroundcolor='#00a9ff'");
//当鼠标移开时还原背景色
e.row.attributes.add("onmouseout", "this.style.backgroundcolor=c");
}
}
前台代码：
<form id="form1" runat="server"> <p><asp:gridview allowsorting="true" autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" datakeynames="身份证号码" datasourceid="sqldatasource1" font-size="12px" id="gridview1" onrowdatabound="gridview1_rowdatabound" runat="server"> <columns> <asp:boundfield datafield="身份证号码" headertext="身份证号码" readonly="true" sortexpression="身份证号码"> <asp:boundfield datafield="姓名" headertext="姓名" sortexpression="姓名"> <asp:boundfield datafield="家庭住址" headertext="家庭住址" sortexpression="家庭住址"> <asp:boundfield datafield="邮政编码" headertext="邮政编码" sortexpression="邮政编码"> </asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns> <footerstyle backcolor="white" forecolor="#000066"> <rowstyle forecolor="#000066"> <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white"> <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left"> <headerstyle backcolor="#006699" font-bold="true" forecolor="white"> </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview> <asp:sqldatasource connectionstring="<%$ connectionstrings:北风贸易connectionstring1 %>" datasourcemode="datareader" id="sqldatasource1" runat="server" selectcommand="select top 5 [身份证号码], [姓名], [员工性别], [家庭住址], [邮政编码] from [飞狐工作室]"></asp:sqldatasource></p> </form>
7.鼠标移到gridview某一行时改变该行的背景色方法二：
做法：和上面的一样就是代码不同
protected void gridview1_rowdatabound(object sender, gridviewroweventargs e)
{
//如果是绑定数据行
if (e.row.rowtype == datacontrolrowtype.datarow)
{
//鼠标经过时，行背景色变
e.row.attributes.add("onmouseover", "this.style.backgroundcolor='#e6f5fa'");
//鼠标移出时，行背景色变
e.row.attributes.add("onmouseout", "this.style.backgroundcolor='#ffffff'");
}
}
8.gridview实现删除时弹出确认对话框：
实现方法：
双击gridview的onrowdatabound事件；
在后台的gridview1_rowdatabound()方法添加代码，最后代码如下所示：
protected void gridview1_rowdatabound(object sender, gridviewroweventargs e)
{
//如果是绑定数据行
if (e.row.rowtype == datacontrolrowtype.datarow)
{
if (e.row.rowstate == datacontrolrowstate.normal || e.row.rowstate == datacontrolrowstate.alternate)
{
((linkbutton)e.row.cells[6].controls[0]).attributes.add("onclick", "javascript：return confirm('你确认要删除：/"" + e.row.cells[1].text + "/"吗?')");
}
}
}
9.gridview实现自动编号：
实现方法：
双击gridview的onrowdatabound事件；
在后台的gridview1_rowdatabound()方法添加代码，最后代码如下所示：
protected void gridview1_rowdatabound(object sender, gridviewroweventargs e)
{
if (e.row.rowindex != -1)
{
int id = e.row.rowindex + 1;
e.row.cells[0].text = id.tostring();
}
}
注意这时最好把前台的第一列的表头该为“编号”，因为以前的第一列被“吃掉”了。
<asp:gridview autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" font-size="12px" id="gridview1" runat="server" data-cke-pa-onrowcancelingedit="gridview1_rowcancelingedit" data-cke-pa-onrowdatabound="gridview1_rowdatabound" data-cke-pa-onrowdeleting="gridview1_rowdeleting" data-cke-pa-onrowediting="gridview1_rowediting" data-cke-pa-onrowupdating="gridview1_rowupdating">
<footerstyle backcolor="white" forecolor="#000066">
<columns>
<asp:boundfield datafield="身份证号码" headertext="编号" readonly="true">
<asp:boundfield datafield="姓名" headertext="用户姓名">
<asp:boundfield datafield="员工性别" headertext="性别">
<asp:boundfield datafield="家庭住址" headertext="家庭住址">
<asp:commandfield headertext="选择" showselectbutton="true">
<asp:commandfield headertext="编辑" showeditbutton="true">
<asp:commandfield headertext="删除" showdeletebutton="true">
</asp:commandfield></asp:commandfield></asp:commandfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns>
<rowstyle forecolor="#000066">
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
<headerstyle backcolor="#006699" font-bold="true" forecolor="white">
</headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>
10.gridview实现自定义时间货币等字符串格式：
解决方法：
在asp.net 2.0中，如果要在绑定列中显示比如日期格式等，如果用下面的方法是显示不了的
主要是由于htmlencode属性默认设置为true,已防止xss攻击，安全起见而用的，所以，可以有以下两种方法解决
1、
<asp :gridview="" id="gridview1" runat="server">
<columns>
<asp :boundfield="" datafield="creationdate" dataformatstring="{0:m-dd-yyyy}" headertext="creationdate" htmlencode="false">
</asp></columns>
</asp>
将htmlencode设置为false即可
另外的解决方法为，使用模版列
<asp :gridview="" id="gridview3" runat="server"> <columns> <asp :templatefield="" headertext="creationdate"> <edititemtemplate> <asp :label="" id="label1" runat="server" text="'<%#">'> </asp> </edititemtemplate> <itemtemplate> <asp :label="" id="label1" runat="server" text="’<%#">'> </asp> </itemtemplate> </asp> </columns> </asp>
前台代码：
<asp:gridview allowsorting="true" autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" datakeynames="身份证号码" datasourceid="sqldatasource1" font-size="12px" id="gridview1" runat="server" data-cke-pa-onrowdatabound="gridview1_rowdatabound">
<columns>
<asp:boundfield datafield="身份证号码" headertext="身份证号码" readonly="true" sortexpression="身份证号码">
<asp:boundfield datafield="姓名" headertext="姓名" sortexpression="姓名">
<asp:boundfield datafield="邮政编码" headertext="邮政编码" sortexpression="邮政编码">
<asp:boundfield datafield="出生日期" headertext="出生日期" sortexpression="出生日期">
<asp:boundfield datafield="起薪" headertext="起薪" sortexpression="起薪">
</asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns>
<footerstyle backcolor="white" forecolor="#000066">
<rowstyle forecolor="#000066">
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
<headerstyle backcolor="#006699" font-bold="true" forecolor="white">
</headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>
<asp:sqldatasource connectionstring="<%$ connectionstrings:北风贸易connectionstring1 %>" datasourcemode="datareader" id="sqldatasource1" runat="server" selectcommand="select top 5 [出生日期], [起薪], [身份证号码], [姓名], [家庭住址], [邮政编码] from [飞狐工作室]"></asp:sqldatasource>
附录-常用格式化公式：
{0:c}货币；
{0:d4}由0填充的4个字符宽的字段中显示整数；
{0:000.0}四舍五入小数点保留第几位有效数字；
{0:n2}小数点保留2位有效数字；{0:n2}%小数点保留2位有效数字加百分号；
{0:d}长日期；{0:d}短日期；{0:yy-mm-dd}例如07-3-25；；{0:yyyy-mm-dd}例如2007-3-25
11.gridview实现用“...”代替超长字符串：
解决方法：数据绑定后过滤每一行即可
for (int i = 0; i <= gridview1.rows.count - 1; i++)
{
datarowview mydrv;
string gintro;
if (gridview1.pageindex == 0)
{
mydrv = myds.tables["飞狐工作室"].defaultview[i];//表名
gintro = convert.tostring(mydrv["家庭住址"]);//所要处理的字段
gridview1.rows[i].cells[3].text = substr(gintro, 2);
}
else
{
mydrv = myds.tables["飞狐工作室"].defaultview[i + (5 * gridview1.pageindex)];
gintro = convert.tostring(mydrv["家庭住址"]);
gridview1.rows[i].cells[3].text = substr(gintro, 2);
}
}
调用的方法：
public string substr(string sstring, int nleng)
{
if (sstring.length <= nleng)
{
return sstring;
}
string snewstr = sstring.substring(0, nleng);
snewstr = snewstr + "...";
return snewstr;
}
12.gridview一般换行与强制换行：
首先设置
protected void page_load(object sender, eventargs e)
{
//正常换行
gridview1.attributes.add("style", "word-break:keep-all;word-wrap:normal");
//下面这行是自动换行
gridview1.attributes.add("style", "word-break:break-all;word-wrap:break-word");
if (!ispostback)
{
bind();//调用数据绑定即可
}
}
总之：善用css的word-break:break-all;word-wrap:break-word属性即可，这个属性是通用的对于顽固的南换行问题都可以解决，不局限于gridview。
13.gridview显示隐藏某一列：
解决方案：
public void bind()
{
string sqlstr = "select top 5 * from 飞狐工作室";
sqlcon = new sqlconnection(strcon);
sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
dataset myds = new dataset();
sqlcon.open();
myda.fill(myds, "飞狐工作室");
gridview1.datasource = myds;
gridview1.datakeynames = new string[] { "身份证号码" };
gridview1.databind();
sqlcon.close();
gridview1.columns[3].visible = false;//一开始隐藏
checkbox1.checked = false;//如果不这样后面的代码会把他true
}
双击checkbox1，在checkedchanged方法里写上代码，最后代码如下：
protected void checkbox1_checkedchanged(object sender, eventargs e)
{
gridview1.columns[3].visible=! gridview1.columns[3].visible;
response.write("gridview1的第4列现在的显示隐藏状态是："+gridview1.columns[3].visible.tostring());
}
注意：checkbox1的autopostback要true！
后台全部代码如下：
using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
public partial class _default : system.web.ui.page
{
sqlconnection sqlcon;
sqlcommand sqlcom;
string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=sa";
protected void page_load(object sender, eventargs e)
{
if (!ispostback)
{
viewstate["sortorder"] = "身份证号码";
viewstate["orderdire"] = "asc";
bind();
}
}
protected void gridview1_rowediting(object sender, gridviewediteventargs e)
{
gridview1.editindex = e.neweditindex;
bind();
}
protected void gridview1_rowdeleting(object sender, gridviewdeleteeventargs e)
{
string sqlstr = "delete from 飞狐工作室 where 身份证号码='" + gridview1.datakeys[e.rowindex].value.tostring() + "'";
sqlcon = new sqlconnection(strcon);
sqlcom = new sqlcommand(sqlstr,sqlcon);
sqlcon.open();
sqlcom.executenonquery();
sqlcon.close();
bind();
}
protected void gridview1_rowupdating(object sender, gridviewupdateeventargs e)
{
sqlcon = new sqlconnection(strcon);
string sqlstr = "update 飞狐工作室 set 姓名='"
+ ((textbox)(gridview1.rows[e.rowindex].cells[1].controls[0])).text.tostring().trim() + "',家庭住址='"
+ ((textbox)(gridview1.rows[e.rowindex].cells[3].controls[0])).text.tostring().trim() + "' where 身份证号码='"
+ gridview1.datakeys[e.rowindex].value.tostring() + "'";
sqlcom=new sqlcommand(sqlstr,sqlcon);
sqlcon.open();
sqlcom.executenonquery();
sqlcon.close();
gridview1.editindex = -1;
bind();
}
protected void gridview1_rowcancelingedit(object sender, gridviewcancelediteventargs e)
{
gridview1.editindex = -1;
bind();
}
public void bind()
{
string sqlstr = "select top 5 * from 飞狐工作室";
sqlcon = new sqlconnection(strcon);
sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
dataset myds = new dataset();
sqlcon.open();
myda.fill(myds, "飞狐工作室");
gridview1.datasource = myds;
gridview1.datakeynames = new string[] { "身份证号码" };
gridview1.databind();
sqlcon.close();
gridview1.columns[3].visible = false;
checkbox1.checked = false;
}
protected void checkbox1_checkedchanged(object sender, eventargs e)
{
gridview1.columns[3].visible=! gridview1.columns[3].visible;
response.write("gridview1的第4列现在的显示隐藏状态是："+gridview1.columns[3].visible.tostring());
}
}
前台代码：
<form id="form1" runat="server"> <p><asp:gridview autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" font-size="12px" id="gridview1" onrowcancelingedit="gridview1_rowcancelingedit" onrowdeleting="gridview1_rowdeleting" onrowediting="gridview1_rowediting" onrowupdating="gridview1_rowupdating" runat="server"> <footerstyle backcolor="white" forecolor="#000066"> <columns> <asp:boundfield datafield="身份证号码" headertext="编号" readonly="true"> <asp:boundfield datafield="姓名" headertext="用户姓名"> <asp:boundfield datafield="邮政编码" headertext="邮政编码" sortexpression="邮政编码"> <asp:boundfield datafield="家庭住址" headertext="家庭住址"> <asp:commandfield headertext="选择" showselectbutton="true"> <asp:commandfield headertext="编辑" showeditbutton="true"> <asp:commandfield headertext="删除" showdeletebutton="true"> </asp:commandfield></asp:commandfield></asp:commandfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns> <rowstyle forecolor="#000066"> <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white"> <pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left"> <headerstyle backcolor="#006699" font-bold="true" forecolor="white"> </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview> <asp:checkbox autopostback="true" font-size="12px" id="checkbox1" oncheckedchanged="checkbox1_checkedchanged" runat="server" text="显示隐藏家庭住址"></asp:checkbox></p> </form>
14.gridview弹出新页面：
<asp:gridview autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" font-size="12px" id="gridview1" runat="server" data-cke-pa-onrowcancelingedit="gridview1_rowcancelingedit" data-cke-pa-onrowdeleting="gridview1_rowdeleting" data-cke-pa-onrowediting="gridview1_rowediting" data-cke-pa-onrowupdating="gridview1_rowupdating">
<footerstyle backcolor="white" forecolor="#000066">
<columns>
<asp:boundfield datafield="身份证号码" headertext="编号" readonly="true">
<asp:boundfield datafield="邮政编码" headertext="邮政编码" sortexpression="邮政编码">
<asp:boundfield datafield="家庭住址" headertext="家庭住址">
<asp:hyperlinkfield datanavigateurlfields="姓名" datanavigateurlformatstring="default6.aspx?goodsid={0}" datatextfield="姓名" headertext="姓名" navigateurl="~/default6.aspx" target="mainframe" text="姓名">
</asp:hyperlinkfield>
<asp:commandfield headertext="选择" showselectbutton="true">
<asp:commandfield headertext="编辑" showeditbutton="true">
<asp:commandfield headertext="删除" showdeletebutton="true">
</asp:commandfield></asp:commandfield></asp:commandfield></asp:boundfield></asp:boundfield></asp:boundfield></columns>
<rowstyle forecolor="#000066">
<selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white">
<pagerstyle backcolor="white" forecolor="#000066" horizontalalign="left">
<headerstyle backcolor="#006699" font-bold="true" forecolor="white">
</headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview>
datanavigateurlfields是链接的字段名，datanavigateurlformatstring是路径。
15.gridview固定表头(不用javascript只用css!，很好用)：
代码：
<style type="text/css">
.freezing
{
position:relative ;
table-layout:fixed;
top:expression(this.offsetparent.scrolltop);
z-index: 10;
}
.freezing th{text-overflow:ellipsis;overflow:hidden;white-space: nowrap;padding:2px;}</style>
<form id="form1" runat="server">
<p id="dvbody" style="overflow-y: scroll; height: 200px;width:300px"><asp:gridview autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" font-size="12px" id="gridview1" onrowcancelingedit="gridview1_rowcancelingedit" onrowcreated="gridview1_rowcreated" onrowdeleting="gridview1_rowdeleting" onrowediting="gridview1_rowediting" onrowupdating="gridview1_rowupdating" runat="server"> <footerstyle backcolor="white" forecolor="#000066"> <columns> <asp:boundfield datafield="身份证号码" headertext="编号" readonly="true"> <asp:boundfield datafield="邮政编码" headertext="邮政编码" sortexpression="邮政编码"> <asp:boundfield datafield="家庭住址" headertext="家庭住址"> <asp:boundfield datafield="姓名" headertext="姓名"> </asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></columns> <rowstyle forecolor="#000066"> <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white"> <pagerstyle backcolor="white" cssclass="ms-formlabel datagridfixedheader" forecolor="#000066" horizontalalign="left"> <headerstyle backcolor="#006699" cssclass="freezing" font-bold="true" forecolor="white"> </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview></p>
</form>
用法：css设如上的样式，headerstyle加cssclass="freezing，套住gridview的div设置高度宽度
16.gridview合并表头多重表头无错完美版（以合并3列3行举例）
后台代码：
protected void gridview1_rowcreated(object sender, gridviewroweventargs e)
{
switch (e.row.rowtype)
{
case datacontrolrowtype.header:
//第一行表头
tablecellcollection tcheader = e.row.cells;
tcheader.clear();
tcheader.add(new tableheadercell());
tcheader[0].attributes.add("rowspan", "3"); //跨row
tcheader[0].attributes.add("bgcolor", "white");
tcheader[0].text = "";
tcheader.add(new tableheadercell());
//tcheader[1].attributes.add("bgcolor", "red");
tcheader[1].attributes.add("colspan", "6"); //跨column
tcheader[1].text = "全部信息";
//第二行表头
tcheader.add(new tableheadercell());
tcheader[2].attributes.add("bgcolor", "darkseagreen");
tcheader[2].text = "身份证号码";
tcheader.add(new tableheadercell());
tcheader[3].attributes.add("bgcolor", "lightsteelblue");
tcheader[3].attributes.add("colspan", "2");
tcheader[3].text = "基本信息";
tcheader.add(new tableheadercell());
tcheader[4].attributes.add("bgcolor", "darkseagreen");
tcheader[4].text = "福利";
tcheader.add(new tableheadercell());
tcheader[5].attributes.add("bgcolor", "lightsteelblue");
tcheader[5].attributes.add("colspan", "2");
tcheader[5].text = "联系方式";
//第三行表头
tcheader.add(new tableheadercell());
tcheader[6].attributes.add("bgcolor", "khaki");
tcheader[6].text = "身份证号码";
tcheader.add(new tableheadercell());
tcheader[7].attributes.add("bgcolor", "khaki");
tcheader[7].text = "姓名";
tcheader.add(new tableheadercell());
tcheader[8].attributes.add("bgcolor", "khaki");
tcheader[8].text = "出生日期";
tcheader.add(new tableheadercell());
tcheader[9].attributes.add("bgcolor", "khaki");
tcheader[9].text = "薪水";
tcheader.add(new tableheadercell());
tcheader[10].attributes.add("bgcolor", "khaki");
tcheader[10].text = "家庭住址";
tcheader.add(new tableheadercell());
tcheader[11].attributes.add("bgcolor", "khaki");
tcheader[11].text = "邮政编码";
break;
}
}
}
前台：
17.gridview突出显示某一单元格（例如金额低于多少，分数不及格等）
解决方案：主要是绑定后过滤
gridview1.databind();
for (int i = 0; i <= gridview1.rows.count - 1; i++)
{
datarowview mydrv = myds.tables["飞狐工作室"].defaultview[i];
string score = convert.tostring(mydrv["起薪"]);
if (convert.todouble(score) < 34297.00)//大家这里根据具体情况设置可能toint32等等
{
gridview1.rows[i].cells[4].backcolor = system.drawing.color.red;
}
}
sqlcon.close();
全部后台代码：
using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
using system.drawing;
public partial class default7 : system.web.ui.page
{
sqlconnection sqlcon;
sqlcommand sqlcom;
string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=sa";
protected void page_load(object sender, eventargs e)
{
if (!ispostback)
{
bind();
}
}
protected void gridview1_rowediting(object sender, gridviewediteventargs e)
{
gridview1.editindex = e.neweditindex;
bind();
}
protected void gridview1_rowupdating(object sender, gridviewupdateeventargs e)
{
sqlcon = new sqlconnection(strcon);
string sqlstr = "update 飞狐工作室 set 姓名='"
+ ((textbox)(gridview1.rows[e.rowindex].cells[1].controls[0])).text.tostring().trim() + "',家庭住址='"
+ ((textbox)(gridview1.rows[e.rowindex].cells[3].controls[0])).text.tostring().trim() + "' where 身份证号码='"
+ gridview1.datakeys[e.rowindex].value.tostring() + "'";
sqlcom = new sqlcommand(sqlstr, sqlcon);
sqlcon.open();
sqlcom.executenonquery();
sqlcon.close();
gridview1.editindex = -1;
bind();
}
protected void gridview1_rowcancelingedit(object sender, gridviewcancelediteventargs e)
{
gridview1.editindex = -1;
bind();
}
public void bind()
{
string sqlstr = "select top 10 * from 飞狐工作室";
sqlcon = new sqlconnection(strcon);
sqldataadapter myda = new sqldataadapter(sqlstr, sqlcon);
dataset myds = new dataset();
sqlcon.open();
myda.fill(myds, "飞狐工作室");
gridview1.datasource = myds;
gridview1.datakeynames = new string[] { "身份证号码" };
gridview1.databind();
for (int i = 0; i <= gridview1.rows.count - 1; i++)
{
datarowview mydrv = myds.tables["飞狐工作室"].defaultview[i];
string score = convert.tostring(mydrv["起薪"]);
if (convert.todouble(score) < 34297.00)//大家这里根据具体情况设置可能toint32等等
{
gridview1.rows[i].cells[4].backcolor = system.drawing.color.red;
}
}
sqlcon.close();
}
}
前台代码：
<form id="form1" runat="server">
<p><asp:gridview autogeneratecolumns="false" backcolor="white" bordercolor="#cccccc" borderstyle="none" borderwidth="1px" cellpadding="3" font-size="12px" id="gridview1" onrowcancelingedit="gridview1_rowcancelingedit" onrowediting="gridview1_rowediting" onrowupdating="gridview1_rowupdating" runat="server"> <footerstyle backcolor="white" forecolor="#000066"> <columns> <asp:commandfield headertext="编辑" showeditbutton="true"> <asp:boundfield datafield="身份证号码" headertext="编号" readonly="true"> <asp:boundfield datafield="姓名" headertext="姓名"> <asp:boundfield datafield="出生日期" headertext="邮政编码"> <asp:boundfield datafield="起薪" dataformatstring="{0:c}" headertext="起薪" htmlencode="false"> <asp:boundfield datafield="家庭住址" headertext="家庭住址"> <asp:boundfield datafield="邮政编码" headertext="邮政编码"> </asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:boundfield></asp:commandfield></columns> <rowstyle forecolor="#000066"> <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="white"> <pagerstyle backcolor="white" cssclass="ms-formlabel datagridfixedheader" forecolor="#000066" horizontalalign="left"> <headerstyle backcolor="#006699" font-bold="true" forecolor="white"> </headerstyle></pagerstyle></selectedrowstyle></rowstyle></footerstyle></asp:gridview></p>
</form>
18.gridview加入自动求和求平均值小计
解决方案
private double sum = 0;//取指定列的数据和，你要根据具体情况对待可能你要处理的是int
protected void gridview1_rowdatabound(object sender, gridviewroweventargs e)
{
if (e.row.rowindex >= 0)
{
sum += convert.todouble(e.row.cells[6].text);
}
else if (e.row.rowtype == datacontrolrowtype.footer)
{
e.row.cells[5].text = "总薪水为：";
e.row.cells[6].text = sum.tostring();
e.row.cells[3].text = "平均薪水为：";
e.row.cells[4].text = ((int)(sum / gridview1.rows.count)).tostring();
}
}
后台全部代码：
using system;
using system.data;
using system.configuration;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.data.sqlclient;
using system.drawing;
public partial class default7 : system.web.ui.page
{
sqlconnection sqlcon;
sqlcommand sqlcom;
string strcon = "data source=(local);database=北风贸易;uid=sa;pwd=sa";
protected void page_load(object sender, eventargs e)
{
if (!ispostback)
{
bind();
}
}
protected void gridview1_rowediting(object sender, gridviewediteventargs e)
{
gridview1.editindex = e.neweditindex;
bind();
}
protected void gridview1_rowupdating(object sender, gridviewupdateeventargs e)
{
sqlcon = new sqlconnection(strcon);
string sqlstr = "update 飞狐工作室 set 姓名='"
+ ((textbox)(gridview1.rows[e.rowindex].cells[1].controls[0])).text.tostring().trim() + "',家庭住址='"
+ ((textbox)(gridview1.rows[e.rowindex].cells[3].controls[0])).text.tostring().trim() + "' where 身份证号码='"
+ gridview1.datakeys[e.rowindex].value.tostring() + "'";
sqlcom = new sqlcommand(sqlstr, sqlcon);
sqlcon.open();
sqlcom.executenonquery();
sqlcon.close();
gridview1.editindex = -1;
bind();