alert box from asp.net 3.5 Code-Behind

Question

protected void ddlLanguage_SelectedIndexChanged(object sender, EventArgs e)
{           
    if (ddlLanguage.SelectedValue=="es-ES")
    {
        Page page = HttpContext.Current.CurrentHandler as Page;

        page.ClientScript.RegisterStartupScript(typeof(Page), "Script", "<script language='javascript'>alert('All content may not be in Spanish. Do you want to continue...');</script>");            
    }
}

All I want to do is display a simple alert box but all in vain...nothing pops-up. need some ayudar.

Are you sure that the page is actually doing a postback? Do you have AutoPostBack set to true on ddlLanguage? — matk
– matk, Commented Sep 13, 2012 at 15:32
Several problems in your code, but the most prominent is that you are asking for confirmation using alert. For this, you need to use confirm — Icarus
– Icarus, Commented Sep 13, 2012 at 15:41
ddlLanguage.Attributes.Add("OnSelectedIndexChanged", "return confirm(All content may not be in Spanish. Do you want to continue?');"); — Scorpio
– Scorpio, Commented Sep 13, 2012 at 15:44

Waqar Janjua · Accepted Answer · 2012-09-13 15:34:50Z

2

You can also achieve in this way

protected void ddlLanguage_SelectedIndexChanged(object sender, EventArgs e)
{           
  if (ddlLanguage.SelectedValue=="es-ES")
   {         
      Response.Write("<script>alert('All content may not be in Spanish. Do you want to continue...');</script>");            
   }
}

answered Sep 13, 2012 at 15:34

Waqar Janjua

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3 Comments

Scorpio Over a year ago

that seems like a easy fix, it works. But are there any good practice s for doing this..

Scorpio Over a year ago

currently when the alert box is displayed the background goes black. is it possible to keep my website in background and just display this alert box on top of it..

Scorpio Over a year ago

I am trying to use a confirm box instead of alert but its not working even if I cancel it still changes the content to spanish

Agent007 · Accepted Answer · 2012-09-13 15:44:55Z

2

You need to verify if the startup script is not registered already. Check out this post.

Also you can build your custom MessageBox in ASP.NET. Check out this one.

edited Sep 13, 2012 at 15:44

answered Sep 13, 2012 at 15:33

Agent007

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Comments

Krishna Tiwari · Accepted Answer · 2013-02-18 14:21:47Z

0

ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "showalert","Alert Message", true);

This works for me without Postback try this

answered Feb 18, 2013 at 14:21

Krishna Tiwari

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