How To Fire An Event /Function From A Code Behind When I Type 6Th Digit In A Textbox ?

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My uestion is very simple
I am a programmer of C#
how to fire an event /function from a code behind when i type 6th digit in a textbox ??

Posted 6-Jul-14 18:52pm

Member 8073143

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Sergey Alexandrovich Kryukov 7-Jul-14 1:45am

Why?
—SA

2 solutions

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Animesh Datta · Answer 1 · 2014-07-06T19:03:00

Solution 1

In the TextBox Textchange event you may call your function
Try this way

protected void TextBox1_TextChanged(object sender , EventArgs e)
{
 if(TextBox1.Text.Length >5) 
 {
  //put your code here
 }
}

thanks

Posted 6-Jul-14 19:03pm

Animesh Datta

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Member 8073143 7-Jul-14 1:13am

thnaks for the solution
but
No this will be fired for very diit enetred into the textbox
I want only this event to be fired when i entered the 6th digit

SRS(The Coder) · Answer 2 · 2014-07-06T20:12:00

After looking into your scenario i have prepared one sample for this scenario for you.

I have a asp server textbox control in my page like as below :-

ASP.NET

<asp:textbox id="txtTest" text="" runat="server" autopostback="true" ontextchanged="txtTest_TextChanged" clientidmode="Static"></asp:textbox>

The TextChanged event handler code is as follows in cs code behind for example :-

C#

protected void txtTest_TextChanged(object sender, EventArgs e)
        {
            Response.Write("Success Test");
        }

Now in jQuery on document ready handle the keyup event as below to fire the server side TextChanged event on more than 6 character as below :-

JavaScript

$(function () {
            $("#txtTest").keyup(function (e) {
                if ($("#txtTest").val().length > 6) {
                    __doPostBack('<%# txtTest.ClientID %>', 'OnTextChanged')
                }
            });
        });

Hope this will also be working for you.
Please let me know if any kind of problem you are facing with this code example to get your issue resolve.