以下方法或属性之间的调用不明确 - WPF

Posted 2023-02-25

【中文标题】以下方法或属性之间的调用不明确 - WPF

【英文标题】：The call is ambiguous between the following methods or properties - WPF

【发布时间】：2012-05-03 23:58:18

【问题描述】：

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，都会弹出一条消息。相反，它会在我的控制器中引发异常：

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

这是我的看法：

 <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);
        
    

【问题讨论】：

抱歉，我的错误已经在同一个类中有另一个方法，这就是它抛出异常的原因，现在它的工作方式符合预期

【参考方案1】：

您遇到的异常表明它无法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称为 Close 或 CloseCommand 并导致冲突？

【讨论】：

抱歉，忘记更改关闭方法，大写“C”。在我的代码中，它的大写“C”但我有错误抛出 @this.CloseCommand = new DelegateCommand(this. Close);//这里我得到异常抛出“以下方法或属性之间的调用不明确”

【参考方案2】：

异常的原因，我确实已经有了该方法，并且我正在尝试创建一个，这就是它抛出该错误的原因。非常感谢您的帮助。