how to display alert box in asp.net

Question

i have a registration page with a submit button.

i want to show an alert box when the "user clicks on the submit button" after which the "data entered by the user is inserted in the database."

int i = obj.IU_SubscriberMaster(0, txtFirstname.Text, txtLastname.Text, txtEmail.Text, txtPassword.Text);

        if (i > 0)
        {
            Call ErrorTrap("errormsg");
        }

this is where i want to show the alert. i used

    function alerts(str) {
    return false;
}

and than by creating a function errortrap

public void ErrorTrap(string str)
{
    if (!ClientScript.IsStartupScriptRegistered("alert"))
    {
        Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alerts('" + str + "');", true);
    }
}

but it did not work

can anyone please help?

Win · Accepted Answer · 2013-04-04 19:09:55Z

6

Regular Page

public void ErrorTrap(string str)
{
   Page.ClientScript.RegisterStartupScript(this.GetType(), "alert" + UniqueID, 
     "alert('" + str + "');", true);
}

Ajax Page

You need to use ScriptManager if you use ajax.

public void ErrorTrap(string str)
{
   ScriptManager.RegisterStartupScript(Page, Page.GetType(), "alert" + UniqueID, 
      "alert('" + str + "');", true);
}

answered Apr 4, 2013 at 19:09

Win

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1 Comment

Micro Over a year ago

when I run the "Regular Page" one I notice that the alert happens before some of my positioning css on the menu items

Code Maverick · Accepted Answer · 2013-04-04 18:10:24Z

1

alerts:

Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alerts('" + str + "');", true);

needs to be alert:

 Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('" + str + "');", true);

answered Apr 4, 2013 at 18:10

Code Maverick

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Comments

TB80 · Accepted Answer · 2013-04-04 18:13:00Z

0

Did you mean for the javascript to be "alerts("+ str + "');" and not "alert(" + str + "');"?

answered Apr 4, 2013 at 18:13

TB80

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Comments

Dustine Tolete · Accepted Answer · 2013-09-02 06:44:18Z

0

alerts should be alert. if you are using ajax, better use ScriptManager.

answered Sep 2, 2013 at 6:44

Dustine Tolete

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