how to set TextChange Event For TextBox?!

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hi all
i Have A textBox that I Want When I Press a Key ،a Server Function Call!!!

I add OnTextChanged="TextBoxChang" but it Not Works Correctly!!!
when TextBoxChang call that first Focuse and Then Blur and Then Checked For Text is Changing Or not!

i want User Press A Key a Server Function Call!!!
thanks So Much

Failure Is Not An Option

<asp:TextBox ID="TextBoxCaption"  ClientIDMode="Static" runat="server" OnTextChanged="TextBoxCaption_TextChanged">

in server Side:

 protected void TextBoxCaption_TextChanged(object sender, EventArgs e)
    {
//Not Act When i Press Every Key
    }

Posted 1-Apr-13 4:59am

Seyed Ahmad Mirzaee

Updated 1-Apr-13 5:17am

Richard C Bishop

v3

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Richard C Bishop 1-Apr-13 11:02am

Post your code please.

Seyed Ahmad Mirzaee 1-Apr-13 11:14am

i send Thanks

Seyed Ahmad Mirzaee 1-Apr-13 11:11am

<asp:TextBox ID="TextBoxCaption" ClientIDMode="Static" runat="server" OnTextChanged="TextBoxCaption_TextChanged">

in server Side:
protected void TextBoxCaption_TextChanged(object sender, EventArgs e)
{
//Not Act When i Press Every Key
}

4 solutions

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Thomas Daniels · Answer 1 · 2013-04-01T05:44:00

Solution 2

Hi,

Have a look here:
http://stackoverflow.com/questions/6400992/asp-net-textbox-textchanged-clarification-needed[^]

Posted 1-Apr-13 5:44am

Thomas Daniels

Comments

Seyed Ahmad Mirzaee 1-Apr-13 11:46am

Thanks,But I Saw Before and ...

Richard C Bishop · Answer 2 · 2013-04-01T05:18:00

Solution 1

Try setting the AutoPostBack = true.

Posted 1-Apr-13 5:18am

Richard C Bishop

Updated 1-Apr-13 5:36am

v2

Comments

Seyed Ahmad Mirzaee 1-Apr-13 11:22am

No,It dose Not Work!!!!

Seyed Ahmad Mirzaee 1-Apr-13 11:23am

In Asp Call function Dosent Need '()'

Richard C Bishop 1-Apr-13 11:34am

You are correct, did you try setting the AutoPostBack = true?

Seyed Ahmad Mirzaee 1-Apr-13 11:48am

Yes.Thanks

Richard C Bishop 1-Apr-13 11:50am

So it works now?

Masoom Mir · Answer 3 · 2013-04-01T18:01:00

You have to use jquery for that, bellow is the example
<script type="text/javascript">

C#

$("#TextBoxCaption").keypress(function () {
     // here is your code

   });

</script>
there is no keypress event in server side

<asp:textbox id="TextBoxCaption" runat="server" ontextchanged="TextBoxCaption_TextChanged" autopostback="true" >

ontextchanged only works when you lost focus from text box and when you give AutoPostBack="true"

Ing. Vazquez · Answer 4 · 2013-04-01T19:48:00

Here you go:

Your textbox control:

ASP.NET

<asp:textbox id="TextBoxCaption" runat="server" xmlns:asp="#unknown">AutoPostBack="true" OnTextChanged="TextBoxCaption_TextChanged"/>
</asp:textbox>

Code behind:

C#

protected void TextBoxCaption_TextChanged(object sender, EventArgs e)
{
    TextBox txt = sender as TextBox;
    if (txt != null)
    {
        //your code here
    }
}

Now, if you want that a function fires by pressing (typing) the A key you need to add the OnKeyPress or KeyDown event, but it need call a javascript function.

Your textbox control:

ASP.NET

<asp:textbox id="TextBoxCaption" runat="server" autopostback="true" onkeypress="yourjavascriptfunction():" xmlns:asp="#unknown" />

Javascript function:

JavaScript

function yourjavascriptfunction()
{
    var keyCode = window.event.keyCode;
    if (keyCode == yourkeycode)
    {
      //your code here
    }
}

if this is not what you are looking you can check this info:
http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/844590e7-4625-402f-81b2-333a176041f5/

http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/59e916d8-c2d9-4025-b59b-751a40610b65

how to set TextChange Event For TextBox?!

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