La boîte d'alerte Javascript ne s'affiche pas via le code derrière le fichier C #

Question

J'ai besoin d'implémenter une fonctionnalité dans laquelle je dois d'abord montrer le script Java à partir du code derrière le fichier, puis l'utilisateur doit être redirigé vers une autre page.

J'ai utilisé à la fois

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

et

ClientScriptManager.RegisterStartupScript();

mais aucun d'entre eux ne faisait apparaître boîte d'alerte L'extrait de code est comme:

//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);

mais aucun d'entre eux ne montre la boîte d'alerte

S'il vous plaît aidez-moi à sortir

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.