Clearing asp:textbox when click asp:botton on clientclick

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Hi,

We've one text box (asp:textbox) and a button (asp:button type=image) in asp.net page.
The below javascript function has been called on OnClientClick of the button.

document.getElementById("txtID").value="";

or

document.getElementById("<%=txtID.ClientID%>").value="";

This results in it clearing the value in text box, but, when post back, the value of the text box it not cleared.

When I validate in code behind like;

If(txtID.Text <> "")
{
   .....
}

it executes the lines inside the if statement.

We are using VS 2008, .Net Framework 2.0 and the controls are placed inside update panel.

If anybody have an idea please help us to overcome this issue.

Thanks,
Rishi

Posted 10-Nov-10 20:34pm

WinCrs

Updated 10-Nov-10 21:47pm

Dalek Dave

v2

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Dalek Dave 11-Nov-10 3:47am

Edited for Readability, Code Block and Syntax.

2 solutions

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TweakBird · Answer 1 · 2010-11-10T20:41:00

Solution 1

Add trigger for Update Panel (try it once)

XML

<ajax:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
-- Your Content Here.
</ContentTemplate>
<Triggers><ajax:AsyncPostBackTrigger ControlID="btnId" </Triggers>
</ajax:UpdatePanel>

Posted 10-Nov-10 20:41pm

TweakBird

Comments

Dalek Dave 11-Nov-10 3:48am

Good Call.

Kirankumar Ballapalli · Answer 2 · 2010-11-10T20:50:00

Solution 2

Hi,

If you are using Ajax controls, why it is going to postback?
Is there any upload functionality in that screen?

Do the following thing.
1.Add the button id to Update panel as Triggers.
2.Enable ChildTriggers property as True.

Regards,
Kiran.

Posted 10-Nov-10 20:50pm

Kirankumar Ballapalli