WindowViewModelBase.cs

Language: C#
Last Modified: 2020-06-27 1:58:37 PM UTC
File Size: 3300 bytes

http://www.penguinstew.ca/example/MVVMbase/ViewModelBase/WindowViewModelBase.cs

using System;

using System.ComponentModel;

using System.Windows;

namespace Penguin.MVVMBase.ViewModelBase

{

public class WindowViewModelBase : ValidationViewModelBase, IWindowViewModel

{

#region IWindowViewModel

/// <summary>

/// Event raised to indicate implementing viewModel is requesting a view

/// </summary>

public event EventHandler<RequestViewArgs> ViewRequested;

/// <summary>

/// Event raised to indicate implementing viewModel is requesting a message box be shown

/// </summary>

public event EventHandler<RequestMsgBoxArgs> MsgBoxRequested;

/// <summary>

/// Method called when the view is loaded

/// </summary>

/// <param name="sender">The sender object as passed to the loaded event handler</param>

/// <param name="e">RoutedEventArgs as passed to the loaded event handler</param>

public virtual void ViewLoaded(object sender, RoutedEventArgs e)

{

//Default implementation: do nothing

return;

}

/// <summary>

/// Method called when a requested view has closed

/// </summary>

/// <param name="viewModel">The ViewModel of the closed view</param>

/// <param name="result">Return value of the view</param>

public virtual void RequestedViewClosed(IWindowViewModel viewModel, bool result)

{

//Default implementation: do nothing

return;

}

#endregion

#region Protected Methods

/// <summary>

/// Raises the ViewRequested event with the given viewModel

/// </summary>

/// <param name="viewModel">ViewModel to request a view for</param>

protected void RequestView(IWindowViewModel viewModel)

{

EventHandler<RequestViewArgs> handler = ViewRequested;

if (handler != null)

{

handler(this, new RequestViewArgs(viewModel));

}

/// <summary>

/// Raises the RequestMsgBox event with the given parameters

/// </summary>

/// <param name="messageBoxText">The text to display in the MessageBox</param>

/// <param name="messageBoxCaption">The caption to display in the MessageBox (default "")</param>

/// <param name="messageBoxButtons">The buttons to display in the MessageBox (default OK)</param>

/// <param name="messageBoxIcon">The image to display in the MessageBox (default None)</param>

/// <param name="callback">The action to call with the MessageBox result (default null)</param>

protected void RequestMsgBox(string messageBoxText, string messageBoxCaption = "", MessageBoxButton messageBoxButtons = MessageBoxButton.OK,

MessageBoxImage messageBoxIcon = MessageBoxImage.None, Action<MessageBoxResult> callback = null)

{

EventHandler<RequestMsgBoxArgs> handler = MsgBoxRequested;

if (handler != null)

{

handler(this, new RequestMsgBoxArgs(messageBoxText, messageBoxCaption, messageBoxButtons, messageBoxIcon, callback));

}

#endregion

}