Home > ASP.Net > Check all checkoxes in a Repeater

Check all checkoxes in a Repeater


try this example to Check all checkoxes in a repeater

<div id="Repeater1Div">
 <asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="Repeater1_ItemDataBound">
   <table width="100%" cellpadding="0" cellspacing="0">
     <asp:CheckBox id="CheckAllCheckBox" Text="Check All" runat="server" />
   <table width="100%" border="2" cellpadding="0" cellspacing="0">
     <td valign="top">
      <asp:Label id="Label1" Text='<%# Eval("SomeDatabaseField") %>' runat="server"></asp:Label>
     <td valign="top">
      <asp:CheckBox ID="CheckBox1" runat="server" />

<script type="text/javascript">
function checkAllCheckBoxes(elementRef, parentId)
 var parentRef = document.getElementById(parentId);
 var inputElementArray = parentRef.getElementsByTagName('input');
 for (var i=0; i<inputElementArray.length; i++)
  var inputElementRef = inputElementArray[i];
  if ( inputElementRef.type == 'checkbox' )
   inputElementRef.checked = elementRef.checked;
 return false;
function setCheckAllCheckBox(elementRef, checkAllCheckBoxID)
 var checkAllCheckBoxRef = document.getElementById(checkAllCheckBoxID);
 if ( elementRef.checked == false )
  checkAllCheckBoxRef.checked = false;
 return false;
// -->

in code behind:

private string g_headerCheckBoxId = string.Empty;

protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
 if (e.Item.ItemType == ListItemType.Header)
  CheckBox headerCheckBox = (CheckBox)e.Item.FindControl("CheckAllCheckBox");
  if (headerCheckBox != null)
   string containerId = "Repeater1Div";
   string clickHandler = string.Format("checkAllCheckBoxes(this, '{0}');", containerId);
   headerCheckBox.Attributes.Add("onclick", clickHandler);
   g_headerCheckBoxId = headerCheckBox.ClientID;
 else if ((e.Item.ItemType == ListItemType.AlternatingItem) || (e.Item.ItemType == ListItemType.Item))
  CheckBox checkBoxRef = (CheckBox)e.Item.FindControl("CheckBox1");
  if (checkBoxRef != null)
   string clickHandler = string.Format("setCheckAllCheckBox(this, '{0}');", g_headerCheckBoxId);
   checkBoxRef.Attributes.Add("onclick", clickHandler);

Hope this helps

Good Luck

Categories: ASP.Net
  1. RRaveen
    July 2, 2009 at 10:13 am

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