wpf MVVM、DialogService 和 Dialog Result
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MVVM, DialogService and Dialog Result
提问by bdan
I'm currently learning WPF/MVVM, and have been using the code in the following question to display dialogs using a Dialog Service (including the boolean change from Julian Dominguez):
我目前正在学习 WPF/MVVM，并且一直在使用以下问题中的代码来显示使用对话框服务的对话框（包括来自 Julian Dominguez 的布尔更改）：
Good or bad practice for Dialogs in wpf with MVVM?
Displaying a dialog works well, but the dialog result is always false despite the fact that the dialog is actually being shown. My DialogViewModel is currently empty, and I think that maybe I need to "hook up" my DialogViewModel to the RequestCloseDialog event. Is this the case?
显示对话框效果很好，但尽管实际上正在显示对话框，但对话框结果始终为假。我的 DialogViewModel 目前是空的，我想我可能需要将我的 DialogViewModel 与 RequestCloseDialog 事件“挂钩”。是这种情况吗？
采纳答案by blindmeis
does your DialogViewmodel implement IDialogResultVMHelper? and does your View/DataTemplate has a Command Binding to your DialogViewmodel which raise the RequestCloseDialog?
您的 DialogViewmodel 是否实现了 IDialogResultVMHelper？你的视图/数据模板是否有一个命令绑定到你的 DialogViewmodel，它引发了 RequestCloseDialog？
eg
例如
public class DialogViewmodel : INPCBase, IDialogResultVMHelper
{
private readonly Lazy<DelegateCommand> _acceptCommand;
public DialogViewmodel()
{
this._acceptCommand = new Lazy<DelegateCommand>(() => new DelegateCommand(() => InvokeRequestCloseDialog(new RequestCloseDialogEventArgs(true)), () => **Your Condition goes here**));
}
public event EventHandler<RequestCloseDialogEventArgs> RequestCloseDialog;
private void InvokeRequestCloseDialog(RequestCloseDialogEventArgs e)
{
var handler = RequestCloseDialog;
if (handler != null)
handler(this, e);
}
}
anywhere in your Dialog control:
在 Dialog 控件中的任何位置：
<StackPanel Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Right" MinHeight="30">
<Button IsDefault="True" Content="übernehmen" MinWidth="100" Command="{Binding AcceptCommand}"/>
<Button IsCancel="True" Content="Abbrechen" MinWidth="100"/>
</StackPanel>
and then your result should work in your viewmodel
然后你的结果应该在你的视图模型中工作
var dialog = new DialogViewmodel();
var result = _dialogservice.ShowDialog("My Dialog", dialog );
if(result.HasValue && result.Value)
{
//accept true
}
else
{
//Cancel or false
}
