How to Calll a function on change a dynaically created textbox's text

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

when I change the txtGainMark's text, the result shown into a label "lblDataOperation", but I want to get the changed value into a string variable and call a C# function with that value as a parameter.

Posted 15-Sep-13 20:38pm

sazzad37

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Harshil_Raval 16-Sep-13 3:06am

Hi, you want to call server side event, when textbox value change? or after changing value on some button click event you want to get textbox value?

3 solutions

Solution 3

Yes please check with autopostback property. You are not submitting the page on text chnage thats why unable to submit the page.

Posted 15-Sep-13 22:09pm

Singh Gyan

Comments

sazzad37 16-Sep-13 5:07am

When I set autopostback property true then the textbox txtGainMark will divisible. But I need it visible.

sazzad37 16-Sep-13 5:33am

I have manage. Thank you for your reply

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Gitanjali Singh · Accepted Answer · 2013-09-15T20:45:00

Solution 1

C#

protected void Page_Load(object sender, EventArgs e)
   {
       TextBox textBox = new TextBox();
       textBox.TextChanged += new EventHandler(textBox_TextChanged);
   }

   protected void textBox_TextChanged(object sender, EventArgs e)
   {
       // Your code here
   }

Hope this will help.

Posted 15-Sep-13 20:45pm

Gitanjali Singh

Comments

sazzad37 16-Sep-13 2:54am

I have try this, but it's not work.(I am not using Page_Load to create dynamic textbox)

Gitanjali Singh 16-Sep-13 3:25am

http://www.codeproject.com/Questions/653847/How-to-use-EventHandler-for-dynamic-textbox

try this

Anand Kumar Prajapati · Accepted Answer · 2013-09-15T21:09:00

Solution 2

Before adding Textbox to placeholder, just bind TextChanged event to it.

C#

{

    //... same previous code

    txtGainMark.TextChanged += new EventHandler(txtGainMark_TextChanged);
    placeholder.Controls.Add(txtGainMark);
}
protected void txtGainMark_TextChanged(object sender, EventArgs e)
{
    // Do your work here
}

Ask, if any problem :)

Posted 15-Sep-13 21:09pm

Anand Kumar Prajapati

Updated 16-Sep-13 1:53am

v2

Comments

sazzad37 16-Sep-13 3:13am

I have try this, but txtGainMark_TextChanged was not fired when I change anything in my textbox.

Anand Kumar Prajapati 16-Sep-13 3:38am

Add this also, before adding it to placeholder -
txtGainMark.AutoPostBack=true;

JoCodes 16-Sep-13 3:25am

Tried an autopostback property added to the dynamic textbox for the text change event to be fired??

Anand Kumar Prajapati 16-Sep-13 3:38am

Thumbs Up!

sazzad37 16-Sep-13 5:08am

When I set autopostback property true then the textbox txtGainMark will divisible. But I need it visible.