Question

I want to show a Javascript when user submit a page. I am calling this Javascript through code behind (I think this was easy). Here is my code:

 MessageBox1("Testing my Message"); //Calling Function!

 private void MessageBox1(string msg) //This is in the code behind of the page.
    {


        // Cleans the message to allow single quotation marks
        string cleanMessage = msg.Replace("'", "\\'");
        string script = "<script type=\"text/javascript\">alert('" + cleanMessage + "');</script>";

        // Gets the executing web page
        Page page = HttpContext.Current.CurrentHandler as Page;

        // Checks if the handler is a Page and that the script isn't allready on the Page
        if (page != null && !page.ClientScript.IsClientScriptBlockRegistered("alert"))
        {
            page.ClientScript.RegisterClientScriptBlock(typeof(CommSetup), "alert", script);
        }


    }

This is not working…What I am doing wrong here? Thank you!

Answer 1

Use this static method to pop the alert:

  public static void JS_Alert(string message)
    {
        // Cleans the message to allow single quotation marks
        string cleanMessage = message.Replace("'", "\\'");
        string script = "<script type=\"text/javascript\">alert('" + cleanMessage + "');</script>";

        // Gets the executing web page
        Page page = HttpContext.Current.CurrentHandler as Page;

        // Checks if the handler is a Page and that the script isn't allready on the Page
        if (page != null && !page.ClientScript.IsClientScriptBlockRegistered("alert"))
        {
            page.ClientScript.RegisterClientScriptBlock(typeof(Utilities), "alert", script);
        }
    }

EDIT: “Utilities” should be the name of the class you place this method in. Mine happens to be called Utilities. If your putting it in the code-behind partial class, its usually called whatever your web page is called with .cs on the end.