How to resolve Error Showing a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation

Question

I am working on project  In my System when I run the project it is running nicely  but after uploading it to my domain when I check  then it displays the error like    Showing a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation  Specify the ServiceNotification or DefaultDesktopOnly style to display a notification from a service application    Description  An unhandled exception occurred during the execution of the current web request  Please review the stack trace for more information about the error and where it originated in the code    Exception Details  System InvalidOperationException  Showing a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation  Specify the ServiceNotification or DefaultDesktopOnly style to display a notification from a service application   What is is the reason for this and how can I resolve it   Please help me     Thanks

User · Answer

You 100  can do this on the server side          Protected Sub Button3 Click sender As Object  e As System EventArgs      MesgBox  Test   End Sub  Private Sub MesgBox ByVal sMessage As String      Dim msg As String     msg     lt script language  javascript  gt       msg     alert     amp  sMessage  amp            msg      lt  script gt       Response Write msg  End Sub   here is actually a whole slew of ways to go about this http   www sislands com coin70 week1 dialogbox htm

User · Answer

You also encounter this if you run an Application on a Scheduled Task in Non-Interactive mode   As soon as you show a Dialog it throws the error      Showing a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation  Specify the ServiceNotification or DefaultDesktopOnly style to display a notification from a service application    You can see its a MessageBox causing the problem in the stack trace   at System Windows Forms MessageBox ShowCore IWin32Window owner  String text  String caption  MessageBoxButtons buttons  MessageBoxIcon icon   MessageBoxDefaultButton defaultButton  MessageBoxOptions options  Boolean showHelp      Solution  If you re running your app on a Scheduled Task send an email instead of showing a Dialog

User · Answer

For Vb Net Framework 4 0  U can use   Alert  your message here   Boolean    The Boolean here can be True or False  True If you want to close the window right after  False If you want to keep the window open

User · Answer

This error can be resolved by adding MessageBoxOptions ServiceNotification   MessageBox Show msg   Print Error   System Windows Forms MessageBoxButtons YesNo      System Windows Forms MessageBoxIcon Error          System Windows Forms MessageBoxDefaultButton Button1      System Windows Forms MessageBoxOptions ServiceNotification      But it is not going to show any dialog box if your web application is installed on IIS or server Because in IIS or server it is hosted on worker process which dont have any desktop

User · Answer

You can t show dialog box ON SERVER from ASP NET application  well of course tehnically you can do that but it makes no sense since your user is using browser and it can t see messages raised on server  You have to understand how web sites work  server side code  ASP NET in your case  produces html  javascript etc on server and then browser loads that content and displays it to the user  so in order to present modal message box to the user you have to use Javascript  for example alert function  Here is the example for asp net   https   www madskristensen net blog javascript-alertshow e2809dmessagee2809d -from-aspnet-code-behind

[asp.net] How to resolve Error : Showing a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation

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