TextBox1 _TextChanged event not firing after many postbacks of a page

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1.00/5 (1 vote)

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Hello,

I have a problem where Textbox event is not firing after postbacks of a page.

The textbox is placed in a Updatepanel.

I am using the text box to enter zipcodes and fill the cities dropdown accordingly.

In the page.. we have some validation..

before checking the validation... the textchanged event is firing.

but after checking validations..that is after postbacks..the textxhanged event is not firing.

I tried using

txtCode.TextChanged += new EventHandler(txtCode_TextChanged);

...in pageload.

but didnt work.

Can anyone help me in solving .

Thank you,
yashoda

Posted 28-Apr-11 21:34pm

bandayashoda

Updated 28-Apr-11 21:35pm

Ankit Rajput

v2

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Ankit Rajput 29-Apr-11 3:36am

EDIT: Code block added for better understanding

bandayashoda 29-Apr-11 4:49am

protected void txtCode_TextChanged(object sender, EventArgs e)
{
try
{
//Function to get the City Details
GetCity();
}
catch (Exception ex)
{}

Ankit Rajput 29-Apr-11 3:37am

Can you please provide some code?

bandayashoda 29-Apr-11 4:50am

protected void txtCode_TextChanged(object sender, EventArgs e)
{
try
{
//Function to get the City Details
GetCity();
}
catch (Exception ex)
{

Hemant__Sharma 29-Apr-11 6:18am

Well you need to provide full code i.e. how the text box is placed where are you attaching the event handler and so on. The code sample you gave here wont be of any help because if the text chagned event is not getting fired you wont come inside it.

Thanks
Hemant

Sergey Alexandrovich Kryukov 29-Apr-11 3:52am

Tag it! If you say "postback" it must be ASP.NET, isn't it?
--SA

Sandeep Mewara 29-Apr-11 4:10am

1. Is AutoPostback property on textbox true? If so, why?
2. Your sequence just does not sounds right. Tried to DEBUG?

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Hemant__Sharma · Answer 1 · 2011-04-28T22:19:00

Hello Bandayashoda,

Did you try adding text_changed event in text tag of your .aspx page?
Did you try adding event handler statement in page's preinit?

Somehow the binding of your textbox's change event is not happening or the information to raise the event is not passed to the textbox control during request processing.

Well you need to provide some code to better understand the issue.