Question

我有一个WPF表单，其中包含一些用于保存用户输入，删除和取消的按钮。我试图添加功能，以便每当用户单击取消按钮时，会弹出一条消息。相反，它会在我的控制器中抛出一个异常：

"The call is ambiguous between the following methods or properties"

以下是我的观点：

 <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" Margin="0,0,0,0">                        
    <Button Name="DeleteButton" Command="{Binding DeleteCommand}" CommandParameter="{Binding Path=SelectedStory}"  Cursor="Hand" Height="25" IsEnabled="{Binding CanDelete}" Margin="5 0 0 0">Delete</Button>
    <Button Name="SubmitButton" Command="{Binding SubmitCommand}" CommandParameter="{Binding Path=SelectedStory}"  Cursor="Hand" Height="25"  Margin="5 0 0 0">Submit</Button>
    <Button Name="CancelButton" Command="{Binding CloseCommand}" CommandParameter="{Binding Path=SelectedStory}"  Cursor="Hand" Height="25" Margin="5 0 0 0" >Cancel</Button>
 </StackPanel>

我的控制器代码：

    public MetadataController(IGatewayService gateway, IEventAggregator eventAggregator, IDialogService dialog)
    {
        this.gateway = gateway;
        this.eventAggregator = eventAggregator;
        this.dialog = dialog;

        // commands            
        this.CloseCommand = new DelegateCommand<StoryItem>(this.Close);//here i got the exception throwing "the call is ambiguous between the following methods or properties"
        this.DeleteCommand = new DelegateCommand<StoryItem>(this.Delete);
        this.SubmitCommand = new DelegateCommand<StoryItem>(this.Submit, this.HasFieldsRequiredBeforeSubmit);

        this.eventAggregator.GetEvent<StorySelectedEvent>().Subscribe(OnStorySelected);
    }

    private void Close(StoryItem selsectedStory)//when i click my close button its not calling this method at all.
    {
        bool isConfirmed = this.dialog.ShowConfirmation("Are you sure you want to close?");
    }

    private void Delete(StoryItem selectedStory)
    {
        bool isConfirmed = this.dialog.ShowConfirmation("Are you sure you want to permanently delete ?");

        if (isConfirmed)
        {
            this.gateway.DeleteStoryItem(selectedStory);

            this.eventAggregator.GetEvent<CommandCompletedEvent>().Publish(CommandTypes.MetadataEntry);
        }
    }

Answer 1

您获得的异常表示它不知道如何访问您尝试调用的任何方法/属性。也许还有一些其他方法或属性也被称为Close或CloseCommand并导致冲突？

Answer 2

异常的原因，我确实已经有了这个方法，我试图创建一个，这就是为什么它会抛出那个错误。感谢帮助人员。

在以下方法或属性之间调用是不明确的 - WPF

2 个答案: