Advanced Search

Dialog Service for MVVM Apps

/ Published in: C#
Save to your folder(s)
In MVVM, where there should be little or no code behind with strong separation of concerns, one might wonder how to create dialogs. If you show a dialog using `new SaveFileDialog()`, when Unit Testing, a dialog will show, halting the unit test. With a service class such as this, one might provide a service implementing `IDialogService` that provides the ViewModel with the required information

Expand | Embed | Plain Text

Copy this code and paste it in your HTML 
  1. interface IDialogService
  2. {
  3.     public string[] GetOpenFileDialog();
  4.     public string GetSaveFileDialog();
  5. }
  6.  
  7. class DialogService : IDialogService
  8. {
  9.     public string[] GetOpenFileDialog(string title, string filter)
  10.     {
  11.         var dialog = new OpenFileDialog();
  12.         dialog.CheckFileExists = true;
  13.         dialog.CheckPathExists = true;
  14.         dialog.Multiselect = true;
  15.         dialog.Title = title;
  16.         dialog.Filter = filter;
  17.         if ((bool)dialog.ShowDialog()) {
  18.             return dialog.SafeFileNames;
  19.         }
  20.         return new string[0];
  21.     }
  22.  
  23.     public string GetSaveFileDialog(string title, string filter)
  24.     {
  25.         var dialog = new SaveFileDialog();
  26.         dialog.Title = title;
  27.         dialog.Filter = filter;
  28.         if ((bool)dialog.ShowDialog()) {
  29.             return dialog.SafeFileName;
  30.         }
  31.         return "";
  32.     }
  33. }

Report this snippet


Comments

RSS Icon Subscribe to comments

You need to login to post a comment.