WPF-非常基本的ListBox.ItemTemplate问题 [英] WPF - Very basic ListBox.ItemTemplate Question

问题描述

好吧，这是一个看起来非常尴尬的问题，但是让我发疯.我正在学习有关DataTemplating的内容，并试图将一个非常简单的ItemTemplate应用于ListBox.

但是，当我运行我的应用程序时，该模板将被完全忽略，而我得到的是标准外观的列表框，而实际上，我希望看到旁边带有测试"的复选框列表.

我已经尝试了几次，而且结果总是一样.我已经检查了Google上的几个资源，并且所有资源在ListBox上都具有相同的语法来定义和ItemTemplate，所以我真的看不到哪里出了问题.

代码...

<Grid x:Name="LayoutRoot">
    <ListBox x:Name="TestList"
        SelectionMode="Multiple">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel>
                    <CheckBox Content="Check this checkbox!"/>
                    <TextBlock>Test</TextBlock>
                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
        <ListBox.Items>
            <ListBoxItem>Bob</ListBoxItem>
            <ListBoxItem>Jim</ListBoxItem>
            <ListBoxItem>Dave</ListBoxItem>
            <ListBoxItem>Larry</ListBoxItem>
            <ListBoxItem>Tom</ListBoxItem>
        </ListBox.Items>            
    </ListBox>
</Grid>

任何帮助，我们将不胜感激.很抱歉看到这样一个愚蠢的问题，但是我真的很容易陷入第一个障碍:(

AT

将ListBoxItem直接作为项目放置时，

解决方案

ItemTemplate将不起作用.一般概念是将CRL集合数据绑定到ListBox.ItemsSource，然后指定ItemTemplate.检查以下代码.

 <Grid x:Name="LayoutRoot">
        <ListBox x:Name="TestList"  SelectionMode="Multiple">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel>
                        <CheckBox Content="Check this checkbox!"/>
                        <TextBlock Text="{Binding}"/>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
            <ListBox.Items>
                <sys:String>Bob</sys:String>
                <sys:String>Jim</sys:String>
                <sys:String>Dave</sys:String>
                <sys:String>Larry</sys:String>
                <sys:String>Tom</sys:String>
            </ListBox.Items>
        </ListBox>
    </Grid>

其中sys是xmlns:sys="clr-namespace:System;assembly=mscorlib"

这样，在后台生成了5个ListBoxItems并将其添加到ListBox.

Ok, this is an embarassingly simple-looking problem, but is driving me crazy. I'm learning about DataTemplating and am trying to apply a very VERY simple ItemTemplate to a ListBox.

However, when I run my app, the template is completely ignored and I just get the standard-looking listbox, whereas in fact I'd expect to see a list of checkboxes with 'Test' along side.

I've tried this several times and always the same result. I've checked several resource on Google and all have the same kind of syntax for defining and ItemTemplate on a ListBox, so I really cannot see where I'm going wrong.

Code...

<Grid x:Name="LayoutRoot">
    <ListBox x:Name="TestList"
        SelectionMode="Multiple">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel>
                    <CheckBox Content="Check this checkbox!"/>
                    <TextBlock>Test</TextBlock>
                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
        <ListBox.Items>
            <ListBoxItem>Bob</ListBoxItem>
            <ListBoxItem>Jim</ListBoxItem>
            <ListBoxItem>Dave</ListBoxItem>
            <ListBoxItem>Larry</ListBoxItem>
            <ListBoxItem>Tom</ListBoxItem>
        </ListBox.Items>            
    </ListBox>
</Grid>

Any help greatly appreciated. Sorry for such a dumb-seeming question, but I've really fallen at the first hurdle here :(

AT

解决方案

ItemTemplate wont work when you put ListBoxItem directly as items. General concept is you databind a CRL collection to the ListBox.ItemsSource and then specify the ItemTemplate. Check the below code.

 <Grid x:Name="LayoutRoot">
        <ListBox x:Name="TestList"  SelectionMode="Multiple">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel>
                        <CheckBox Content="Check this checkbox!"/>
                        <TextBlock Text="{Binding}"/>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
            <ListBox.Items>
                <sys:String>Bob</sys:String>
                <sys:String>Jim</sys:String>
                <sys:String>Dave</sys:String>
                <sys:String>Larry</sys:String>
                <sys:String>Tom</sys:String>
            </ListBox.Items>
        </ListBox>
    </Grid>

where sys is xmlns:sys="clr-namespace:System;assembly=mscorlib"

In this way, there are 5 ListBoxItems getting generated in the background and added to the ListBox.

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