How to use EventHandler for dynamic textbox

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I have create a textbox by simply clicking a button.

C#

TextBox txtGainMark = new TextBox();
txtGainMark.ID = count.ToString();
txtGainMark.Text = "GiveYourMark";
txtGainMark.TextChanged += new EventHandler(updateGivenMark);
placeholder.Controls.Add(txtGainMark);

Just all I need to get the new text of txtGainMark when someone rewrite it. But it's not work(updateGivenMark was not fired). I don't know what the problem is. Please somebody help me.

Posted 15-Sep-13 7:19am

sazzad37

Updated 15-Sep-13 7:20am

v2

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CHill60 15-Sep-13 13:27pm

What does your declare of updateGivenMark look like. This fires up fine for me when I overtype "GiveYourMark"

sazzad37 15-Sep-13 13:33pm

void updateGivenMark(object sender, EventArgs e)
{
TextBox t = (TextBox)sender;
lblDataOperation.Text = t.Text;
}
Here lblDataOperation is a label

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norbitrial · Accepted Answer · 2013-09-15T13:05:00

If you just need this operation you can use some of the events on clientside for textbox.

There is for example a onchange event for textbox on clientside. You can use it and after validation the text of your label will be changed.

Just add this line to your code and try it:

C#

txtGainMark.Attributes.Add("onchange", "javascript:document.getElementById('lblDataOperation').innerHTML = this.value;");

And remove the following code:

C#

txtGainMark.TextChanged += new EventHandler(updateGivenMark);

And here is a really good article how to send data from client to serverside in ASP .Net:
Send and receive JavaScript Array to Web Service Web Method using ASP .Net-AJAX[^]

I hope I could help you!