Disable Add button in Add MVC View dialog when the view name is an empty string.

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/AddMvcViewToProjectView.xaml

@@ -36,7 +36,7 @@
 			<TextBox
 				x:Name="ViewNameTextBox"
 				Grid.Column="1"
-				Text="{Binding Path=ViewName}"/>
+				Text="{Binding Path=ViewName, UpdateSourceTrigger=PropertyChanged}"/>
 		</Grid>
 	
 		<StackPanel

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/AddMvcViewToProjectViewModel.cs

@@ -38,7 +38,7 @@ namespace ICSharpCode.AspNet.Mvc
 		
 		void CreateCommands()
 		{
-			AddMvcViewCommand = new DelegateCommand(param => AddMvcView());
+			AddMvcViewCommand = new DelegateCommand(param => AddMvcView(), param => CanAddMvcView());
 		}
 		
 		public ICommand AddMvcViewCommand { get; private set; }
@@ -56,6 +56,11 @@ namespace ICSharpCode.AspNet.Mvc
 			}
 		}
 		
+		public bool CanAddMvcView()
+		{
+			return viewFileName.HasValidViewName();
+		}
+		
 		public void AddMvcView()
 		{
 			GenerateMvcViewFile();

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/MvcViewFileName.cs

@@ -69,5 +69,10 @@ namespace ICSharpCode.AspNet.Mvc
 			}
 			return "View1";
 		}
+		
+		public bool HasValidViewName()
+		{
+			return !String.IsNullOrEmpty(viewName);
+		}
 	}
 }

src/AddIns/BackendBindings/AspNet.Mvc/Test/Src/AddMvcViewToProjectViewModelTests.cs

@@ -167,5 +167,27 @@ namespace AspNet.Mvc.Tests
 			
 			Assert.AreEqual(expectedFileNameOpened, fileNameOpened);
 		}
+		
+		[Test]
+		public void AddMvcViewCommand_ViewNameIsEmptyString_CommandIsDisabled()
+		{
+			CreateViewModel();
+			viewModel.ViewName = String.Empty;
+			
+			bool canExecute = viewModel.AddMvcViewCommand.CanExecute(null);
+			
+			Assert.IsFalse(canExecute);
+		}
+		
+		[Test]
+		public void AddMvcViewCommand_ViewNameIsNotEmptyString_CommandIsEnable()
+		{
+			CreateViewModel();
+			viewModel.ViewName = "MyView";
+			
+			bool canExecute = viewModel.AddMvcViewCommand.CanExecute(null);
+			
+			Assert.IsTrue(canExecute);
+		}
 	}
 }