在WPF CommandConverter不能从System.String转换 [英] CommandConverter cannot convert from System.String in WPF

问题描述

我在使用.NET框架4.5

I have strange error in WPF using .NET Framework 4.5

<Window.CommandBindings>
        <CommandBinding Command="ImportExcelCmd" CanExecute="ImportExcelCmd_CanExecute" Executed="ImportExcelCmd_Executed"></CommandBinding>
</Window.CommandBindings>
<Window.InputBindings>
        <KeyBinding Key="I" Modifiers="Control" Command="ImportExcelCmd"></KeyBinding>
</Window.InputBindings>

我收到一个错误 CommandConverter不能从System.String转换

在哪里是我的错。

我还有一个绑定到ListView，如：<？ / p>

I have another binding to a ListView, like:

<ListView.CommandBindings>
     <CommandBinding Command="Delete" CanExecute="Delete_CanExecute" Executed="Delete_Executed"></CommandBinding>
</ListView.CommandBindings>
<ListView.InputBindings>
      <KeyBinding Key="Delete" Command="Delete"></KeyBinding>
</ListView.InputBindings>

和它的作品。

推荐答案

如果你想使用 自定义选路命令 ，您使用更详细的定义。

If you want to use Custom Routed commands, you to use more verbose definition.

声明路由命令静态类，然后用用它在XAML中的 X：静态 。
你可以参考答案 这里 。

Declare the routed command as static in class and then use it in XAML using x:Static. You can refer to the answer here.

有关答案的完整性考虑，我张贴的答案在这里的相关代码：

For the sake of completeness of the answer, I am posting the relevant code from the answer here:

namespace MyApp.Commands
{
    public class MyApplicationCommands
    {
        public static RoutedUICommand ImportExcelCmd 
                            = new RoutedUICommand("Import excel command", 
                                                  "ImportExcelCmd", 
                                                  typeof(MyApplicationCommands));
    }
}

XAML

<Window x:Class="..."
             ...
             xmlns:commands="clr-namespace:MyApp.Commands">
...
<Window.CommandBindings>
    <CommandBinding
            Command="{x:Static commands:MyApplicationCommands.ImportExcelCmd}"
            CanExecute="ImportExcelCmd_CanExecute"
            Executed="ImportExcelCmd_Executed" />
</Window.CommandBindings>

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