Alert box pop-up problem

Question

4.00/5 (1 vote)

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On submit button I have user validation to enter user id so that then can submit.
I have used javascript to show alert box.
Code:
ScriptManager.RegisterStartupScript(this, typeof(Page), "script", "alert('Please, enter valid User id.');", true);

It works fine. Then i click on one of the link to go to other page. Come back to main page.
I get alert showing Please, enter valid User id. , without clicking on submit button.

Help me out.

I view sourced it.
I found at bottom of page, as:

XML

<script type="text/javascript">
//<![CDATA[
alert('Please, enter valid User id.');//]]>
</script>

which i didn't created it.

Posted 26-Apr-13 1:04am

Sant Osha

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Comments

kk2014 26-Apr-13 7:08am

have u given your button as a default button in your form somewhere?

Sant Osha 26-Apr-13 7:35am

no

kk2014 26-Apr-13 7:38am

ok. where did you put your ScriptManager.RegisterStartupScript(this, typeof(Page), "script", "alert('Please, enter valid User id.');", true); ???

Sant Osha 26-Apr-13 7:39am

button click event

kk2014 26-Apr-13 7:40am

can you paste your code here. so i can check and revert back to you...

Sant Osha 26-Apr-13 7:42am

protected void ibtnLogin_Click(object sender, ImageClickEventArgs e)
{
if(txtLogin.Text.Trim() =="User ID")
{
ScriptManager.RegisterStartupScript(this, typeof(Page), "script", "alert('Please, enter valid User id.');", true);
txtLogin.Text = "User ID";
check = false;
}
else
{
//login code
}

kk2014 26-Apr-13 7:52am

remove code

<script type="text/javascript">
//<![CDATA[
alert('Please, enter valid User id.');//]]>
</script>

it initializes every time when your page loads....

let me know if it works for you...

Sant Osha 26-Apr-13 8:05am

how to i remove when page load

kk2014 26-Apr-13 8:07am

delete above code which is in your .aspx page

Sant Osha 26-Apr-13 8:09am

dude.. this is not in my aspx page...
its created automatically when button clicked on client side

ZurdoDev 26-Apr-13 7:28am

That's because ScriptManager.RegisterStartupScript is running again. What event do you have that code in?

sri senthil kumar 26-Apr-13 7:28am

This will happen since you have used "RegisterStartupScript". Have you used that code in button click?

Sant Osha 26-Apr-13 7:35am

yes.

sri senthil kumar 26-Apr-13 8:47am

Can't you do the validation in javascript itself instead of going to codebehind? May it will help you to come out of this.

[no name] 26-Apr-13 9:13am

i think u can use if page.ispostback to come out from it

[no name] 26-Apr-13 11:14am

how are you going back ...clicking on some link or back button..??

[no name] 26-Apr-13 11:21am

I think you page is cached on the browser and you need to stop caching .Try adding this header on page load..Response.AddHeader("Pragma", "no-cache"); and see if it works for you

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