总结ASP.NET C#中经常用到的13个JS脚本代码

在c#开发过程中，免不了写一些js，其实做后端开发的，本身不擅长写js，干脆总结一下，方便自己也方便别人，分享给大家。呵呵~~

1.按钮前后台事件

<asp:button id="button1" runat="server" onclick="button1_click" text="button"
onclientclick="alert('客房端验证，阻止向服务器端提交');return false;" />

2.注册相关事件：onblur,onclick,onchange

this.textbox1.attributes.add("onchange",
"alert('数据被改动，现检查输入是否符合规则');");

3.注册相关属性：

this.textbox1.attributes.add("readonly", "true");

4.引入js文件

前台html页面：

<script type="text/javascript" src="jscript.js" language="javascript"></script>
<script type="text/javascript" language="javascript">
function fn_name()
{
    alert("js");
}
</script>

后台cs页面：

this.registerclientscriptblock("jsfile",
"<script type='text/javascript' src='jscript.js' language='javascript'></script>");
[code]

5.点击按钮时 相关栏位 非空判断

[code]
function checkempty(txtobj,msgshow)
{
    if(txtobj.value == "")
    {
        alert(msgshow);
        return false;
    }
}
<asp:button id="button1" runat="server" onclick="button1_click" text="button"
onclientclick="return checkempty(textbox1,'textbox1 不能为空')" />

6.通过chcekbox的是否点选来控制其相对应的textbox 是否可输入

function chktextbox(chkobj,txtobj)
{
    if(chkobj.checked==true)
    {
        txtobj.value = "";
        txtobj.readonly = false;   
        txtobj.focus();
    }
    if(chkobj.checked == false)
    {
        txtobj.value = "";
        txtobj.readonly = true;    
    }
}
<input id="checkbox1" type="checkbox" onclick="chktextbox(checkbox1,textbox1)" />

7.传值到模态窗口 并得到传回的值

var encodequeryname = escape(name);
var strpara = "'dialogwidth: 400px;dialogheight: 400px;dialogleft: 300px;dialogtop: 200px;toolbar: no;menubar: no;resizable: yes;location: no;status: no;scrollbars= no'";
var returninfo = window.showmodaldialog("qryname.aspx?&name="+encodequeryname +"&queryid="+querytype+"",'',strpara);
if(returninfo !=null)
{
    var arrayreturninfo = returninfo .split("@");
    document.all.drpid.value = arrayreturninfo[1];
    document.all.txtname.value= arrayreturninfo[2];
}

8.弹出js的确认对话框,并根据确认结果 触发后台相关操作

if(confirm('确认如何吗?'))
{
  document.all.hidbtn_submit.click();
}
else
{
  document.all.hidbtn_cancel.click();
}

html页面相关代码：

<input id="hidbtn_submit" type="button" value="确认修改"
style="display:none;"
onserverclick="hidbtn_submit_serverclick"
runat="server" />

9.添加页面对快捷键的响应,如 按f2时 进行新增按钮的操作等

#region 添加页面对快捷键的响应
string strjs_shortkey = "<script language='javascript' type='text/javascript' > ";
strjs_shortkey += " document.onkeydown=shortkeydown; ";
strjs_shortkey += " function shortkeydown()  ";
strjs_shortkey += " { ";
// 新增
if (this.buttonctl1.imgbtn_addfamily.visible)
{
    string btninsertcid = this.buttonctl1.imgbtn_insert.clientid.trim();
    //f2 - 113
    strjs_shortkey += " if(event.keycode=='113') ";
    strjs_shortkey += "  { ";
    strjs_shortkey += "    document.all('" + btninsertcid + "').click();";
    strjs_shortkey += "    event.keycode= 0; ";
    strjs_shortkey += "    event.returnvalue = false; ";
    strjs_shortkey += "    return false; ";
    strjs_shortkey += "  } ";
}
// 修改
if (this.buttonctl1.imgbtn_edit.visible)
{
    string btneditcid = this.buttonctl1.imgbtn_edit.clientid.trim();
    //f3 - 114
    strjs_shortkey += " if(event.keycode=='114') ";
    strjs_shortkey += "  { ";
    strjs_shortkey += "    document.all('" + btneditcid + "').click();";
    strjs_shortkey += "    event.keycode= 0; ";
    strjs_shortkey += "    event.returnvalue = false; ";
    strjs_shortkey += "    return false; ";
    strjs_shortkey += "  } ";
}
strjs_shortkey += " } ";
//注册事件
page.registerstartupscript("shortkey", strjs_shortkey);
#endregion

10.弹出的提示 分行显示

alert('aaa \r\n bbb \r\n ccc');

如果是在后台.cs文件中注册
则需要

string stralertcontent = "aaa"+" ";
stralertcontent += "bbb" +" ";

11.点击gridview上的某一行时,行首列处的radiobutton处于选中状态,同时保存相关值在隐藏栏位

//用查询得的数据集进行绑定
if (dt.rows.count > 0)
{
    //绑定
    this.gv_infofromsendmodule.datasource = dt;
    this.gv_infofromsendmodule.databind();
    //确定按钮显示
    this.btn_ok.visible = true;
    this.txthid_rowcount.text = dt.rows.count.tostring();
}
//gridview的rowdatabound
protected void gv_infofromsendmodule_rowdatabound(object sender, gridviewroweventargs e)
{
   if (e.row.rowindex < 0)
      return;
   e.row.attributes.add("onclick", "radbutton('" + e.row.rowindex.tostring() + "','" + e.row.cells[1].text.trim() + "');");
   //radiobutton rad = (radiobutton)e.row.cells[0].findcontrol("rad_select");
   //rad.attributes.add("onclick", "radbutton('"+e.row.rowindex.tostring()+"','"+ e.row.cells[1].text.trim()+"');");
}
//行上所绑定的js
function radbutton(rowindex,rowguid)
{
    //gv_infofromsendmodule$ctl02$rad_select
    var rowcount = parseint(document.all.txthid_rowcount.value)+2;
    for(var i=2;i<rowcount;i++)
    {
        var tmpname;
        if(i<10)
        {
            tmpname = "gv_infofromsendmodule$ctl0"+i+"$rad_select";              
        }
        else
        {
            tmpname = "gv_infofromsendmodule$ctl"+i+"$rad_select";  
        }
        //取得对应的radio对象
        var tmpradio = document.getelementbyid(tmpname);
        //当前选中 其他取消选中
        if((i-2) == rowindex)
        {                
            tmpradio.checked = true;
        }
        else
        {
            tmpradio.checked = false;
        }
    }
    document.all.txthid_guid.value = rowguid;
}

12.去掉前后空格

function fn_trim(obj)
{
    if(obj==null)
    {
       return;
    }
    else
    {
        var oldstr = obj.value;
        var newstr = oldstr.replace(/^\s+|\s+$/g,"");
        obj.value = newstr;
    }     
}

13.textbox文本内容长度判断 看是否超过长度 超过返回true

function fn_istoolong(obj,varlength)
{
    if(obj==null)
    {
       return false;
    }
    else
    {
        var valuestr = obj.value;
        var len = valuestr.match(/[^ -~]/g) == null ? valuestr.length : valuestr.length + valuestr.match(/[^ -~]/g).length ;
        if(len > parseint(varlength) )
        {
            return true;
        }
        else
        {
            return false;
        }
    }     
}