how to implement onChange event in asp.net

Question

0.00/5 (No votes)

See more:

hello all...
i am developing a asp.net application using C#..
i want the value of the text box should be filled automatically according to the value of another text box........

Please Help........

Posted 27-Feb-11 23:41pm

Dipesh Gupta

Add a Solution

3 solutions

Add a Solution

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Ankur^\m/ · Answer 1 · 2011-02-28T00:01:00

I would suggest you to give some time to learn and understand the basics.

i want the value of the text box should be filled automatically according to the value of another text box........

The simplest option is to enable AutoPostBack of the TextBox and handle it's TextChanged event.

The code will be something like:

XML

<asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True" ontextchanged="TextBox1_TextChanged"></asp:TextBox>

And in the code behind, it will be like:

C#

protected void TextBox1_TextChanged(object sender, EventArgs e)
{
    //assign value to another text box here.
}

This method is recommended if you need some database interaction or compulsory server side processing.
If the values can be processed on the client side, I recommend using JavaScript to do the same because this avoids a page post back.

The method I suggested above can also be done using AJAX.

Hope this helps!

pankajupadhyay29 · Answer 2 · 2011-02-28T00:09:00

I would like to suggest you use javascript for this
Collapse

<asp:textbox id="TextBox1" runat="server" >
<asp:textbox id="TextBox2" runat="server" >

and now on page_load write the line below

TextBox1.Attributes.Add("onblur","ManipulateValue(this)")

and then handle it in javascript

<script language="javascript">
function ManipulateValue(txt)
{
var text2=document.getElementById("<%=TextBox2.ClientID %>");
text2.value=txt.value;
}
</script>

here i assign the value of textbox1 to 2 but you can perform some task on that.

This will avoid postback which will be happen on server side code..

--Pankaj

Abhinav S · Answer 3 · 2011-02-27T23:52:00

Solution 1

See this very simple example[^] - it will surely help you out.

Posted 27-Feb-11 23:52pm

Abhinav S

Comments

Dipesh Gupta 28-Feb-11 14:09pm

thankx........

how to implement onChange event in asp.net

3 solutions

Solution 2

Solution 3

Solution 1

Add your solution here

Preview 0

how to implement onChange event in asp.net

3 solutions

Solution 2

Solution 3

Solution 1

Add your solution here

Preview 0

Existing Members

...or Join us