relay命令不開火菜單項單擊

我查看relay命令不開火菜單項單擊

<Button.ContextMenu> 
    <ContextMenu x:Name="Conn_Context_button" Style="{StaticResource LeftContextMenuStyle}"> 
    <MenuItem Style="{StaticResource LeftContextMenuItemStyle}" Header="{x:Static properties:ResourceWrapper.Dashboard_Connection_Delete}" Click="MenuItem_DeleteConnection_Click" /> 
    <MenuItem Style="{StaticResource LeftContextMenuItemStyle}" Header="{x:Static properties:ResourceWrapper.Dashboard_Connection_Refresh}" Command="{Binding MyViewModel.RefreshCommand}" /> 
    </ContextMenu>

MyViewModel.cs

public RelayCommand RefreshCommand { get; set; } 
    RefreshCommand = new RelayCommand(RefreshConnection); 
    private void RefreshConnection(object sender) 
    { 
     //My Logic 
    }

這裏RefreshCommand不點火當我點擊刷新菜單項

來源

2016-08-10 surya

也許使用ICommand？ – Whencesoever

也許datacontext不正確，請檢查輸出中的綁定錯誤。如果'MyViewModel'是datacontext，'Command =「{Binding RefreshCommand}'將會解決這個問題。 – Natxo

這不是那麼容易：試試這個http://stackoverflow.com/questions/9994241/mvvm-binding-command-to- contextmenu-item –

作爲一個很好的例子，看看這個situation。

下面是一段簡單的代碼從我目前projets的一個考慮：

private void PrepareCommands() 
{ 
    RefreshCommand = new RelayCommand(RefreshCommandMethod); 
    AddConfigurationCommand = new RelayCommand(AddConfigurationCommandMethod, param => CanAddConfiguration); 
    EditConfigurationCommand = new RelayCommand(EditConfigurationCommandMethod, param => CanEditConfiguration); 
    RemoveConfigurationCommand = new RelayCommand(RemoveConfigurationCommandMethod, param => CanRemoveConfiguration); 
}

在命令

#region Commands 

public ICommand AddConfigurationCommand { get; set; } 
public ICommand EditConfigurationCommand { get; set; } 
public ICommand RemoveConfigurationCommand { get; set; } 
public ICommand RefreshCommand { get; set; } 

#endregion

綁定是

<StackPanel Orientation="Horizontal" HorizontalAlignment="Right" DockPanel.Dock="Right"> 
    <Button Template="{StaticResource AddButton}" Command="{Binding AddConfigurationCommand}" Margin="3,0" /> 
    <Button Template="{StaticResource EditButton}" Command="{Binding EditConfigurationCommand}" Margin="3,0" /> 
    <Button Template="{StaticResource DeleteButton}" Command="{Binding RemoveConfigurationCommand}" Margin="3,0" /> 
</StackPanel>

正如揚沃爾查克以上說，請嘗試使用ICommand而不是RelayCommand。如果您已經創建了自己的RelayCommand，請不要忘記從ICommand繼承。

來源

2016-08-10 15:08:57

relay命令不開火菜單項單擊

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