asp.net中使用DatagridView的增删改方法具体实现

程序员文章站 2024-03-02 18:35:46

default.aspx 页面：复制代码代码如下:<%@ page language="c#" autoeventwireup="true" codebehind...

default.aspx 页面：

<%@ page language="c#" autoeventwireup="true" codebehind="default.aspx.cs" inherits="gps_web.default" %>
<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <!--gridview中必须写的几个事件：onrowediting、onrowupdating、onrowcancelingedit、onrowdeleting--->
        <asp:gridview id="gridview1" runat="server" autogeneratecolumns="false" 
            onpageindexchanging="gridview1_pageindexchanging" onrowcancelingedit="gridview1_rowcancelingedit" 
            onrowediting="gridview1_rowediting" onrowupdating="gridview1_rowupdating" 
            onrowdeleting="gridview1_rowdeleting" 
            onselectedindexchanging="gridview1_selectedindexchanging">
            <columns>
                <asp:templatefield headertext="编号" visible="false">
                    <itemtemplate>
                        <asp:label id="lblnum" runat="server" text='<%# eval("num") %>'></asp:label>
                    </itemtemplate>
                </asp:templatefield>
                <asp:templatefield headertext="姓名">
                    <edititemtemplate>
                        <asp:textbox id="txttablename" runat="server" text='<%# eval("tablename") %>'></asp:textbox>
                    </edititemtemplate>
                    <itemtemplate>
                        <asp:label id="label2" runat="server" text='<%# eval("tablename") %>'></asp:label>
                    </itemtemplate>
                </asp:templatefield>
                <asp:templatefield headertext="地址">
                    <edititemtemplate>
                        <asp:textbox id="txttextname" runat="server" text='<%# eval("textname") %>'></asp:textbox>
                    </edititemtemplate>
                    <itemtemplate>
                        <asp:label id="label3" runat="server" text='<%# eval("textname") %>'></asp:label>
                    </itemtemplate>
                </asp:templatefield>
                <asp:commandfield headertext="状态" showselectbutton="true" />
                <asp:commandfield headertext="编辑" showeditbutton="true" />
                <asp:commandfield headertext="删除" showdeletebutton="true" />
            </columns>
        </asp:gridview>

        <br />
               
        <asp:button id="btnadd" runat="server" onclick="btnadd_click" text="添加" />
        <br />
        <br />    
    </div>
    </form>
</body>
</html>

default.aspx.cs页面代码：

复制代码代码如下:

using system;
using system.web.ui;
using system.web.ui.webcontrols;
using gps_web.ywpages.dal;
using system.data;
namespace gps_web
{
    /// <summary>
    /// 参考的网址：http://blog.csdn.net/wanglei_samrtfish/article/details/8070480
    /// </summary>
    public partial class default : system.web.ui.page
    {
        protected void page_load(object sender, eventargs e)
        {
            if (!page.ispostback)
            {
                gridviewbind();
            }
        }
        private void gridviewbind()
        {
            string sql = "select num,tablename,textname from dbo.grouptype_demo";
            try
            {     //绑定数据源
                gridview1.datasource = sqlhelper.executedataset(sqlhelper.getconnsting(), commandtype.text, sql).tables[0];
                gridview1.databind();
            }
            catch (exception ex){}
        }
        protected void gridview1_pageindexchanging(object sender, gridviewpageeventargs e)
        {
            gridview1.pageindex = e.newpageindex;
            gridviewbind();
        }
        protected void gridview1_rowcancelingedit(object sender, gridviewcancelediteventargs e)
        {
            gridview1.editindex = -1;
            gridviewbind();
        }
        protected void gridview1_rowediting(object sender, gridviewediteventargs e)
        {  //gridview编辑项索引等于单击行的索引
            gridview1.editindex = e.neweditindex;
            gridviewbind();
        }
        /// <summary>
        /// 修改事件
        /// </summary>
        protected void gridview1_rowupdating(object sender, gridviewupdateeventargs e)
        {  //取出编号
            int num = convert.toint32(((label)gridview1.rows[e.rowindex].findcontrol("lblnum")).text.tostring());
            //获取修改的值的内容
            string tablename = ((textbox)gridview1.rows[e.rowindex].findcontrol("txttablename")).text;
            string textname = ((textbox)gridview1.rows[e.rowindex].findcontrol("txttextname")).text;
            //更新记录
            string sql = string.format("update dbo.grouptype_demo set tablename='{0}',textname='{1}' where num={2}",tablename,textname,num);
            try
            {
                int i = sqlhelper.executenonquery(sqlhelper.getconnsting(), commandtype.text, sql);
                if (i > 0)
                {
                    clientscript.registerstartupscript(clientscript.gettype(), "myscript", "<script language='javascript'>alert('修改成功！')</script>");
                }
                else
                {
                    clientscript.registerstartupscript(clientscript.gettype(), "myscript", "<script language='javascript'>alert('修改失败！')</script>");
                }
            }
            catch (exception ex) 
            {
                clientscript.registerstartupscript(clientscript.gettype(), "myscript", "<script language='javascript'>alert('操作无效！')</script>");
            }
            gridview1.editindex = -1;
            gridviewbind();
        }
        /// <summary>
        /// 删除事件
        /// </summary>
        protected void gridview1_rowdeleting(object sender, gridviewdeleteeventargs e)
        {
            //取出编号
            int num = convert.toint32(((label)gridview1.rows[e.rowindex].findcontrol("lblnum")).text.tostring());
            //更新记录
            string sql = string.format("delete dbo.grouptype_demo where num={0}", num);
            try
            {
                int i = sqlhelper.executenonquery(sqlhelper.getconnsting(), commandtype.text, sql);
                if (i > 0)
                {
                    clientscript.registerstartupscript(clientscript.gettype(), "myscript", "<script language='javascript'>alert('删除成功！')</script>");
                }
                else
                {
                    clientscript.registerstartupscript(clientscript.gettype(), "myscript", "<script language='javascript'>alert('删除失败！')</script>");
                }
            }
            catch (exception ex)
            {
                clientscript.registerstartupscript(clientscript.gettype(), "myscript", "<script language='javascript'>alert('操作无效！')</script>");
            }  www.jb51.net
            gridview1.editindex = -1;
            gridviewbind();
        }
        /// <summary>
        /// 添加按钮
        /// </summary>
        protected void btnadd_click(object sender, eventargs e)
        {
            response.redirect("~/default_add.aspx");
        }
        protected void gridview1_selectedindexchanging(object sender, gridviewselecteventargs e)
        {
            //行号
            int i = e.newselectedindex;
            gridviewrow row = gridview1.rows[e.newselectedindex];

            btnadd.text = "你选中了第" + (i+1) + "行。";
        }        
    }
}

执行后的页面效果：

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