El cuadro de alerta de JavaScript no se muestra a través del código detrás del archivo C #

Question

Necesito implementar una funcionalidad en la que primero tengo que mostrar el script de Java del código detrás del archivo y luego el usuario debe ser redirigido a otra página.

He usado tanto

this.Context.Response.Write("<script type='text/javascript'>alert('some text')</script>");

y

ClientScriptManager.RegisterStartupScript();

pero ninguno de ellos estaba mostrando una caja de alertas El fragmento de código es como:

//approach 1
    this.Context.Response.Write("<script type='text/javascript'>alert('some text')</script>");
  SPUtility.Redirect(string.Empty, SPRedirectFlags.UseSource, this.Context);

//approach 2
String csname1 = "PopupScript";
                Type cstype = this.GetType();

                // Get a ClientScriptManager reference from the Page class.
                ClientScriptManager cs = Page.ClientScript;

                // Check to see if the startup script is already registered.
                if (!cs.IsStartupScriptRegistered(cstype, csname1))
                {
                    StringBuilder cstext1 = new StringBuilder();
                    cstext1.Append("<script type=text/javascript> alert('You do not have Access to perform any action.') </");
                    cstext1.Append("script>");

                    cs.RegisterStartupScript(cstype, csname1, cstext1.ToString());
                }
  SPUtility.Redirect(string.Empty, SPRedirectFlags.UseSource, this.Context);

pero ninguno de ellos muestra la caja de alertas

por favor ayúdame

Answer 1

The script will never make it to the client because of the redirect. You either need to send the script with the alert and then postback to perform the redirect (yuck) or perform the redirect in the script by doing a location.replace to the URL you want to redirect to...you could also set location.href to the URL as well.

So you could do something like this:

ClientScript.RegisterClientScriptBlock(this.GetType(), "scriptname", "alert('some message'");location.replace('url to redirect to');", true);

Answer 2

These methods registers and adds the script block to the page. So it will fire after the page is rendered from the server. In your case you are redirecting to some other page while the script is registered on the previous page.

So it would not fire on the previous page.