Used to be web, basically no what JS, this short time, the company inside contact with JS quite a lot, they call me in the DataGrid inside the checkbox to get a "select All", to use JS to achieve, to achieve bulk deletion, this function, directly in C # is very good to achieve, Direct traversal can take the selected ID all out. JS, that can only use the HTML checkbox, this is not a server control, C # background code is inaccessible, so, and then found some information on the Internet, realized.
First, define a DataGrid control, first add a template column, which contains a checkbox for HTML, Attributes name=choessall, (NAME,JS code to use after) Id=chkchoessall, The unique identification of the bound data, here is the ID.
The HTML (. aspx) code is as follows:
< Asp:gridview ID = " Gvuint " runat = " Server " AutoGenerateColumns = " False " Width = " 100% " >
< Columns >
< Asp:templatefield HeaderText = " Select " >
< ItemTemplate >
< Input ID = " Chkchoessall " name = " Choessall " value = '' <%# DataBinder.Eval (Container.DataItem, "ID")%> '' type = " checkbox " />
</ ItemTemplate >
</ Asp:templatefield >
< Asp:boundfield DataField = " ID " HeaderText = " Property name " />
< Asp:boundfield DataField = " Address " HeaderText = " Address " />
</ Columns >
</ Asp:gridview >
Add a HiddenField control (HTML control) property id=Hfid, (used after ID,JS code), and the ID number of the data in the checked check.
Now implement the JS code:
< Script Type = " Text/javascript " >
// Select All
function Checkall_click ()
... {
if(document.form1.ChoessAll.length)
...{
document.getElementById ("Hfid"). Value= ",";
for (varI=0; I<Document.form1.choessall.length;i++)
... {
document.form1.choessall[i].checked = true ;
// document.getelementbyid ("Hfid"). Value = document.getelementbyid ("HfId"). Value + document.form1.choessall[i].value;
// document.getelementbyid ("Hfid"). Value = document.getelementbyid ( "Hfid") .value + ",";
}
}
Else
...{
document.form1.ChoessAll.checked = true;
}
//document.getElementById ("Btnshowid"). Click ();
}
// anti-election
function Checkrechange_click ()
... {
if(Document.form1.ChoessAll.length)
...{
document.getElementById ("Hfid"). Value= ",";
for (varI=0; I<Document.form1.choessall.length;i++)
...{
if(document.form1.choessall[i].checked)
...{
document.form1.choessall[i].checked = false;
}
Else
...{
document.form1.choessall[i].checked = true;
}
//document.getElementById ("Hfid"). Value = document.getElementById ("Hfid"). Value + Document.form1.Cho Essall[i].value;
//document.getElementById ("Hfid"). Value = document.getElementById ("Hfid"). Value + ",";
}
}
Else
...{
document.form1.ChoessAll.checked = true;
}
//document.getElementById ("Btnshowid"). Click ();
}
// Delete Data events (deleted according to the selection box)
function Delete_click ()
... {
if(Document.form1.ChoessAll.length)
...{
varNum=0;
document.getElementById ("Hfid"). Value= ",";
for (varI=0; I<Document.form1.choessall.length;i++)
...{
if(document.form1.choessall[i].checked)
...{
document.getElementById ("Hfid"). Value=document.getElementById ("Hfid"). Value+Document.form1.choessall[i].value;
document.getElementById ("Hfid"). Value=document.getElementById ("Hfid"). Value+ ",";
Num=Num+ 1;
}
}
}
if(0==num)
...{
return alert (" no data is selected!") '' );
}
Else
... {
if (Confirm ( " ") Are you sure you want to delete the selected data? ' )
... {
document.getElementById ( Btnshowid ). Click ();
}
}
</ Script >
Here, just grab a control to touch the method "Select All" and "select" JS function
< a href = " # " onclick = " Checkall_click (); " > Select All </ a >
< a href = " # " onclick = " Checkrechange_click (); " > anti-election </ a >
Here, you can already achieve the "Select All" and "reverse" function (see, is not no refresh).
Finally, realize, batch delete, here, use JS Touch background event, add a server control button,id=btnshowid(JS code to use), set him to hide, add an HTML code, to stimulate the click of this button event.
< a href = " # " onclick = " Delete_click (); " > Remove </ a >
To implement a background event for a button:
protected void Btnshowid_click ( Object sender, EventArgs e)
... {
//The change here to the database operation can be implemented to delete the bulk
Labid.text=hfId.Value.ToString (). Trim ();
string[] Strparam=hfId.Value.ToString (). Split ('','');
for (intI= 0; I<strparam.length;++i)
...{
this. Response.Write (Strparam[i]. ToString (). Trim () + "<br>");
}}
This is the end of the function, and here's the full implementation code:
aspx
<% @ Page Language = " C # " AutoEventWireup = " true " CodeFile = " Default.aspx.cs " Inherits = " _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 > No title page </ title >
< Script Type = " Text/javascript " >
// Select All
function Checkall_click ()
... {
if(Document.form1.ChoessAll.length)
...{
document.getElementById ("Hfid"). Value= ",";
for(var i=0; I<Document.form1.choessall.length;i++)
... {
document.form1.choessall[i]. checked = true ;
// document.getelementbyid ("Hfid") .value = document.getElementById ("Hfid") .value + document.form1.choessall[i].value;
// document.getelementbyid ("Hfid") .value = document.getElementById ("Hfid") .value + ",";
}
}
Else
...{
Document.form1.ChoessAll. checked = true;
}
//document.getElementById ("Btnshowid"). Click ();
}
// anti-election
function Checkrechange_click ()
... {
if(Document.form1.ChoessAll.length)
...{
document.getElementById ("Hfid"). Value= ",";
for(var i=0; I<Document.form1.choessall.length;i++)
...{
if(Document.form1.choessall[i].checked)
...{
Document.form1.choessall[i]. checked = false;
}
Else
...{
Document.form1.choessall[i]. checked = true;
}
//document.getElementById ("Hfid"). Value = document.getElementById ("Hfid"). Value + Document.form1.choessall[i].value;
//document.getElementById ("Hfid"). Value = document.getElementById ("Hfid"). Value + ",";
}
}
Else
...{
Document.form1.ChoessAll. checked = true;
}
//document.getElementById ("Btnshowid"). Click ();
}
// Delete Data events (deleted according to the selection box)
function Delete_click ()
... {
if(Document.form1.ChoessAll.length)
...{
var num=0;
document.getElementById ("Hfid"). Value= ",";
for(var i=0; I<Document.form1.choessall.length;i++)
...{
if(Document.form1.choessall[i].checked)
...{
document.getElementById ("Hfid"). Value=document.getElementById ("Hfid"). Value+Document.form1.choessall[i].value;
document.getElementById ("Hfid"). Value=document.getElementById ("Hfid"). Value+ ",";
Num=Num+ 1;
}
}
}
if(0==num)
...{
return alert (" no data is selected!") '' );
}
Else
...{
if(Confirm (' ) are you sure you want to delete the selected data ? '' ))
... {
document.getElementById ("btnshowid"). Click ();
}
}
}
</ Script >
</ Head >
< Body >
< Form ID = " Form1 " runat = " Server " >
< Div >
< a href = " # " onclick = " Delete_click (); " > Remove </ a >
</ Div >
< Div >
< Asp:gridview ID = " Gvuint " runat = " Server " AutoGenerateColumns = " False " Width = " 100% " >
< Columns >
< Asp:templatefield HeaderText = " Select " >
< ItemTemplate >
< Input ID = " Chkchoessall " name = " Choessall " value = '' <%# DataBinder.Eval (Container.DataItem, "ID")%> '' type = " checkbox " />
</ ItemTemplate >
</ Asp:templatefield >
< Asp:boundfield DataField = " ID " HeaderText = " Property name " />
< Asp:boundfield DataField = " Address " HeaderText = " Address " />
</ Columns >
</ Asp:gridview >
</ Div >
< a href = " # " onclick = " Checkall_click (); " > Select All </ a >
< a href = " # " onclick = " Checkrechange_click (); " > anti-election </ a >
< Asp:label ID = " Labid " runat = " Server " ></ Asp:label >
< Div >
< Asp:hiddenfield ID = " Hfid " runat = " Server " />
< Asp:button ID = " Btnshowid " runat = " Server " Text = " Btnshowid " OnClick = " Btnshowid_click " style = " Display:none " /></ Div >
</ form >
</ Body >
</ HTML >
Cs:
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
... {
protected voidPage_Load (Objectsender, EventArgs e)
...{
}
protected voidBtnshowid_click (Objectsender, EventArgs e)
...{
//The change here to the database operation can be implemented to delete the bulk
Labid.text=HfId.Value.ToString (). Trim ();
string[] Strparam=hfId.Value.ToString (). Split ('','');
for (intI= 0; I<strparam.length;++i)
...{
this. Response.Write (Strparam[i]. ToString (). Trim () + "<br>");
}
}
}
