How to show message box dialog in C# ASP.NET class .cs file?

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1.00/5 (2 votes)

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Hi..
I'm converting my project into 3 layer architecture ,bu I'm stuck here that how can i show message dialog box in asp.net c# Class .cs file.I have a dataservice calss library,How can i show message box in class

What I have tried:

I try this in aspx.cs file its working well,here is javascript code

C#

Response.write(<"Script>alert('Welcome')</Script>");

but when i try in class .cs file but its not working.I want to show message box dialog here: dataservice.cs file

C#

if (resultObj != null)
{
   int.TryParse(resultObj.ToString(), out databaseID);
   //SHOW MESSAGEBOX HERE 


}

Posted 6-May-16 4:30am

Member 12369816

Updated 7-May-16 1:17am

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4 solutions

Solution 4

If you're looking to get some kind of confirmation, or an alert before you continue your code then you're going to have to split your process in two, the first half will result in an html page being shown to the user that will show the alert and have a method to continue with the rest of the process. Some examples of doing this are below

Asking the user to confirm that they want to continue with an action | The ASP.NET Forums[^]

Posted 7-May-16 1:17am

F-ES Sitecore

Solution 3

Maybe this help you

C#

System.Text.StringBuilder sb = new System.Text.StringBuilder();
sb.Append("<script type = 'text/javascript'>");
sb.Append("window.onload=function(){");
sb.Append("alert('");
sb.Append(message);
sb.Append("')};");
sb.Append("</script>");
ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", sb.ToString());

Posted 6-May-16 8:16am

AndreaFerro

Comments

Richard Deeming 7-May-16 7:56am

You need to make sure the message is properly encoded to avoid XSS:
sb.Append(HttpUtility.JavaScriptStringEncode(message));

Also, you shouldn't have spaces within an HTML attribute:
sb.Append("<script type='text/javascript'>");

Solution 2

Refer this similar question which i have answered earlier today.

Show error/exception message in ASP.NET webform project.-CodeProject[^]
let me know if it helps.

Posted 6-May-16 6:12am

Karthik_Mahalingam

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Sergey Alexandrovich Kryukov · Accepted Answer · 2016-05-06T04:50:00

Solution 1

JavaScript alert is a bad idea. It's fine, at best, as a temporary tool used during development process, but hardly flexible enough and good looking enough for the code of production quality. This is good if you want something rudimentary.

Perhaps the best idea would be some facility collectively known as "modal pop-up"; one of the most popular implementation is jQuery Dialog, but there are much more other implementations; many of them are 3rd-party jQuery UI plug-ins, featuring many effects, like transitional, and, notably, dimming. There are similar "models" in other JavaScript libraries. Basically, such products emulate modal behavior, in certain specific sense of this word, on the same Web page, which is a big benefit: there are no pop-up windows, nothing in the browser blocks such behavior.

Please read my article on the topic: Modal Popup From Scratch.

Not only I offer my own fully-functional product, but I also explain the conceptions, how it works, and explain the rationale behind all kinds of such "pop-ups", so you can decide what to use by yourself, or develop your own.

See also: Modal popup.

—SA

Posted 6-May-16 4:50am

Sergey Alexandrovich Kryukov

Updated 6-May-16 4:54am

v2

Comments

Member 12369816 6-May-16 10:58am

Ans my question?How to show message box pop up in class .cs file???

Dave Kreskowiak 6-May-16 11:12am

You can't.

Anything that shows up in the browser window has to be done by client-side code. You can't show anything from your server-side code.

ASP.NET code runs entirely on the server. All it does it generate HTML/script pages and sends that to the browser for it to display. It's a rather simple process called "request-response". The browser requests a page from a URL, the server-side code listening at that URL generates the HTML and send it back to the browser. The browser then renders the HTML on screen. There is no continual connection between the browser and the server and no method that a web server can push content to a client without a request.

Sergey Alexandrovich Kryukov 6-May-16 12:32pm

Thank you for this helpful comment.
I tried to provide more detail explanation of the issue in my new comment below, but obviously the inquirer needs to invest decent time to learn how things work.
—SA

Member 12369816 6-May-16 11:00am

and you provide me dialog jquery which works in html but i want to show message box in code behind

F-ES Sitecore 6-May-16 11:09am

You can't show an alert in your code-behind, it would help to learn and understand the asp.net page lifecycle. Your code behind generates html in one go, ie your code-behind runs until the whole html is created, that html is sent to the browser to show and it is only then that the js can run and show your alert.

Sergey Alexandrovich Kryukov 6-May-16 12:32pm

Thank you for this helpful comment.
I tried to provide more detail explanation of the issue in my new comment below, but obviously the inquirer needs to invest decent time to learn how things work.
—SA

Member 12369816 6-May-16 11:11am

if i have some method in code behind i want to show message box in method then how can i do this in html ???Can you tell me?

Sergey Alexandrovich Kryukov 6-May-16 12:26pm

Are you serious? Then it raises another question: how did you do Web development so far, without having a clue on how Web works in principle, what server side and client site do?

You never ever show anything on the server side at all. All server side does nothing but forming some HTTP response, which can be HTML, JavaScript, any content. And then the HTTP server sends this response back to the client of origin of the HTTP request, and than what is delivered is played on the client's browser. That's all. If you think about all the implications of the Web operation, you will see how to show something on the client side, but first of all you should understand that your question does not make any sense. You can show whatever you want on the client side; and this is all that matters. Active side is always the client side, the server side only responds to the request. Moreover, your "some method" in code behind means nothing by itself. It has its effect only when the complete content (say, HTML with JavaScript) comes back in HTTP response to the client side. Essentially, you could not call JavaScript alert from the server side, too. You could not call anything.

So, the conclusion is: you should set this problem aside for a while, learn how Web works from scratch, then learn basic ASP.NET techniques, and then come back to this problem. But that time, you should clearly realize what to do, and first of all, what do you really want to achieve.

To get some basic idea of ASP.NET-specific way, see also:
https://msdn.microsoft.com/en-us/library/z9h4dk8y%28v=vs.110%29.aspx,
https://msdn.microsoft.com/en-us/library/system.web.ui.page.registerclientscriptblock%28v=vs.110%29.aspx.

So, I answered in full, but my answer is addressed to someone who understands how Web works; it would not make sense otherwise. Really, use my advice, then you will be able to get back to the problem pretty soon. The pay off should be: at the same time, you should be able to really do Web development.

—SA