ASP NET Web Application Message Box

Question

In an asp net windows forms application  in the C  code behind you can use    MessageBox Show  Here is my message      Is there any equivalent in a asp net web application  Can I call something from the C  code behind that will display a message box to the user   Example usage of this   I have a button that loads a file in the code behind   When the file is loaded or if there is an error I would like to popup a message to the user stating the result   Any ideas on this

User · Answer

There are a few solutions  if you are comfortable with CSS  here s a very flexible solution   Create an appropriately styled Panel that resembles a  Message Box   put a Label in it and set its Visible property to false  Then whenever the user needs to see a message after a postback  e g  pushing a button   from codebehind set the Labels Text property to the desired error message and set the Panel s Visible property to true

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Just for the records     Here is a link from Microsoft that I think is the best way to present a MessageBox in ASP Net  Also it presents choices like Yes and NO   Instructions on how to get the class from the link working on your project    If you don t have an App Code folder on your Project  create it  Right click the App Code folder and create a Class   Name it MessageBox cs Copy the text from the MessageBox cs file  from the attached code  and paste it on your MessageBox cs file  Do the same as steps 2  amp  3 for the MessageBoxCore cs file  Important  Right click each file MessageBox cs and MessageBoxCore cs and make sure the  Build Action  is set to Compile Add this code to your aspx page where you want to display the message box    lt asp Literal ID  PopupBox  runat  server  gt  lt  asp Literal gt   Add this code on you cs page where you want to decision to be made   string title    My box title goes here   string text    Do you want to Update this record    MessageBox messageBox   new MessageBox text  title  MessageBox MessageBoxIcons Question  MessageBox MessageBoxButtons YesOrNo  MessageBox MessageBoxStyle StyleA   messageBox SuccessEvent Add  YesModClick    PopupBox Text   messageBox Show this    Add this method to your cs page   This is what will be executed when the user clicks Yes   You don t need to make another one for the NoClick method    WebMethod  public static string YesModClick object sender  EventArgs e        string strToRtn              The code that you want to execute when the user clicked yes goes here     return strToRtn     Add a WebUserControl1 ascx file to your root path and add this code to the file    lt link href    Styles MessageBox css  rel  stylesheet  type  text css    gt   lt div id  result  gt  lt  div gt   lt asp ScriptManager runat  server  ID  scriptManager  EnablePageMethods  True  gt   lt  asp ScriptManager gt      lt -- Make sure you only have one ScriptManager on your aspx page   Remove the one on your aspx page if you already have one   Add this line on top of your aspx page    lt    Register src    MessageBoxUserControl ascx  tagname  MessageBoxUserControl  tagprefix  uc1    gt   Add this line inside your aspx page  Inside your asp Content tag if you have one    lt uc1 MessageBoxUserControl ID  MessageBoxUserControl1  runat  server    gt   Save the image files 1 jpg  2 jpg  3 jpg  4 jpg from the Microsoft project above into your   Images  path  Done   Hope it helps   Pablo

User · Answer

not really  Server side code is happening on the server--- you can use javascript to display something to the user on the client side  but it obviously will only execute on the client side  This is the nature of a client server web technology  You re basically disconnected from the server when you get your response

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Here s a method that I just wrote today  so that I can pass as many message boxes to the page as I want to        lt summary gt      Shows a basic MessageBox on the passed in page      lt  summary gt       lt param name  page  gt The Page object to show the message on lt  param gt       lt param name  message  gt The message to show lt  param gt       lt returns gt  lt  returns gt  public static ShowMessageBox Page page  string message        Type cstype   page GetType            Get a ClientScriptManager reference from the Page class      ClientScriptManager cs   page ClientScript          Find the first unregistered script number     int ScriptNumber   0      bool ScriptRegistered   false      do               ScriptNumber            ScriptRegistered   cs IsStartupScriptRegistered cstype   PopupScript    ScriptNumber         while  ScriptRegistered    true          Execute the new script number that we found     cs RegisterStartupScript cstype   PopupScript    ScriptNumber   alert      message          true

User · Answer

Just add the namespace   System Windows forms    to your web application reference or what ever  and you have the access to your   MessageBox Show  Here is my message      I tried it and it worked   Good luck

User · Answer

There are several options to create a client-side messagebox in ASP NET - see here  here and here for example

User · Answer

As others already pointed out  a message box will be clientside Javascript  So the problem then is how to force a clientside JS message box from the server side  A simple solution is to include this in the HTML    lt script gt      var data     lt    JsData   gt        alert data    lt  script gt    and to fill this data from the server side code-behind   public partial class PageName   Page       protected string JsData    your message     Note that the string value should be a Javascript string  i e  be a one-liner  but it may contain escaped newlines as  n   Now you can use all your Javascript or JQuery skills and tricks to do whatever you want with that message text on the clientside  such as display a simple alert    as shown in the above code sample  or sophisticated message box or message banner    Note that popups are sometimes frowned upon and blocked   Note also that  due to the HTTP protocol  the message can only be shown in response to an HTTP request that the user sends to the server  Unlike WinForm apps  the web server cannot push a message to the client whenever it sees fit   If you want to show the message only once  and not after the user refreshes the page with F5  you could set and read a cookie with javascript code  In any case  the nice point with this method is that it is an easy way to get data from the server to the javascript on the client  and that you can use all javascript features to accomplish anything you like

User · Answer

Why should not use jquery popup for this purpose I use bpopup for this purpose See more about this http   dinbror dk bpopup

User · Answer

Right click the solution explorer and choose the add reference one dialog box will be appear  On that select   net - gt  System windows form  Imports System Windows Forms  vb  and using System windows forms C   copy this in your coding and then write messagebox show

User · Answer

ASP net MessageBox   Add a scriptmanager to the ASP Net Page   lt asp scriptmanager id  ScriptManager1  runat  server    gt    try        string sMsg    My Message      ScriptManager RegisterStartupScript Page  Page GetType  Guid NewGuid   ToString     alert      sMsg         true

User · Answer

You want to use an Alert  Unfortunately it s not as nice as with windows forms   ClientScript RegisterStartupScript this GetType     myalert    alert      myStringVariable          true     Similar to this question here   http   forums asp net t 1461308 aspx 1

User · Answer

You need to reference the namespace     using System Windows Form    and then add in the code   protected void Button1 Click object sender  EventArgs e                MessageBox Show   Hi

User · Answer

if you will include  System Windows forms   as namespace then it will conflict   Use   btn click      System Windows Forms MessageBox Show  Hello

User · Answer

Or create a method like this in your solution   public static class MessageBox       public static void Show this Page Page  String Message           Page ClientScript RegisterStartupScript            Page GetType               MessageBox               lt script language  javascript  gt alert      Message        lt  script gt                       Then you can use it like   MessageBox Show  Here is my message

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