show alert for errors in RadGrid ItemCommand

[ankool]

Hi,

I am using radgrid for a long time now. Earlier I simply use to throw exceptions which occurred in RadGrid ItemCommand or InsertCommand or UpdateCommand and they use to appear as alerts in IE.

I don't know whether it was IE version update or rad grid version update or did I missed some property of RadGrid because of which instead of alerts all my validations are appearing as IE errors.

I just wish to catch exceptions inside RadGrid ItemCommand or InsertCommand or UpdateCommand and show them as alerts. Please help me out with this.

Thanks

[Princy]

Hello Ankool,

Please go through the following KB article to show radalert from code.
Calling radalert from codebehind

Thanks,
Princy.

[Dante696]

I tried your solution, but in a few cases, the radalert doesn't display. I found that it's because in the exceptions messages come special characters like "\n" "\r", can you provide a solution to replace all the characters that made radalert doesn't display?

[Marin]

Hi,

 Those characters are not supported by RadAlert so you have to remove them from the initial string message before passing it to the RadAlert method:

string message = "RadAlert called from server. \n\r";
message = message.Replace("\n", "");
message = message.Replace("\r", "");
RadWindowManager1.RadAlert(message, , .....);

Kind regards,
Marin
the Telerik team

[Dante696]

Hi Marin.

Thanks for your time and your answer.

Could you help me greatly if you know what other characters might be returned by the error messages in SQL queries and are not supported by radalert this in order to avoid possible future issues.

Kind regards,
Felipe de Jesús Meléndez Valencia

[Marin Bratanov]

Hello Felipe,

  The RadAlert accepts an HTML string to display. Characters such as \r and \n are used in a different context and it is the developer's responsibility to handle such cases. I cannot be sure what are all the possible characters that can be present in an error message, yet here is a sample google search on the matter: http://www.google.com/search?&q=SQL+queries+special+characters and one msdn article you may also find useful http://msdn.microsoft.com/en-us/library/aa226544(v=sql.80).aspx.

Another possible approach is to escape the whole string, i.e.:

protected void Page_Load(object sender, EventArgs e)
{
    string message = @"RadAlert called from server. \n\r";
    Response.Write(message);
    RadWindowManager1.RadAlert(message, 300, 100, "title", "callbackFn");
}

to see the difference between the string output via Response.Write and the HTML string. You could also try an encoding method, for example HttpUtility.UrlEncode(), but if it will work for you depends on your custom scenario.

Greetings,
Marin
the Telerik team

[Dante696]

Hi Marin.

Thank you so much for your time and your help.

Kind regards,
Felipe de Jesús Meléndez