OnClientClick event of asp:button

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Hi everyone,

There is something wrong with my code. I am not able to call this onclient event:

C#

function filterSearch()
{
  var combo = $find('<%=RadComboBox1.ClientID %>');
  var comboValue = document.getElementById(combo.UniqueID + "_value").value;
  if (comboValue == null) 
  {
    alert("You must select a category before processing search!");
    return false;
  }
}

<asp:Button ID="btnSearch" runat="server" Style="float: left; color: black; font-weight: bold" Text="Search" OnClick="btnSearch_Click" OnClientClick="javascript: return filterSearch();" />

I want this to run in the OnClientClick event handler of the button, if no value is selected in combobox. What could be the problem?

Thanks,
Amit

Posted 8-Nov-10 23:31pm

AmitChoudhary10

Updated 9-Nov-10 1:32am

v4

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jim lahey 9-Nov-10 5:32am

how are you wiring up the event?

AmitChoudhary10 9-Nov-10 5:41am

<asp:Button ID="btnSearch" runat="server" Style="float: left; color: black; font-weight: bold"
Text="Search" OnClick="btnSearch_Click" OnClientClick="javascript: return filterSearch();" />

AmitChoudhary10 9-Nov-10 7:30am

is it like impossible to validate combobox for an onClientClick button event?..whats wrong with my code? Anybody please....

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shakil0304003 · Answer 1 · 2010-11-09T03:27:00

Your javascript function does not return true value. So, onClick event will never active. after returning true in OnClientClick, onClick event occur.
Like

function filterSearch()
{
  var combo = $find('<%=RadComboBox1.ClientID %>');
  var comboValue = document.getElementById(combo.UniqueID + "_value").value;
  if (comboValue == null) 
  {
    alert("You must select a category before processing search!");
    return false;
  }
return true;
}

<asp:button id="btnSearch" runat="server" style="float: left; color: black; font-weight: bold" text="Search" onclick="btnSearch_Click" onclientclick="return filterSearch()==true?true:false;" xmlns:asp="#unknown" />

AmitChoudhary10 · Answer 2 · 2010-11-09T17:34:00

Here is the code i am using now,and its working fine...

C#

function filterSearch()
{
       var combo = $find('<%=RadComboBox1.ClientID %>');
       var textbox = document.getElementById("txtSearch");
       if (combo.get_selectedIndex() == null)
       {
           alert("You must select a category before processing search!!");
           return false;
       }
}

and for button same as before--

<asp:Button ID="btnSearch" runat="server" Style="float: left; color: black; font-weight: bold" Text="Search" OnClick="btnSearch_Click" OnClientClick="javascript: return filterSearch();" />

OnClientClick event of asp:button

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