Listbox wpf中选择的TextBlocks值 [英] Selected TextBlocks value in Listbox wpf

问题描述

我有一个列表框和一个包含网格和两个文本块（ID，描述）的模板。我使用此模板来查看访问数据库上的某些查询的结果。我已将文本块绑定到数据表列。



但是，如何才能获得所选的描述文本块的值，如字符串？

I have a listbox and a template that contains a grid and two textblocks(ID , Description). I have used this template to view the results of some query on the access database. I have binded the textblocks to columns of datatable.

However, how can i get the value of just the description textblock which is selected, as string?

推荐答案

如果列表框是多选的，您可以使用属性 SelectedItems ，否则您可以使用属性 SelectedItem ， SelectedValue 或 SelectedIndex 。你会来到项目引用，它实际上可以是任何类型，而不仅仅是字符串，所以返回对象的编译时类型是 System.Object ;您可以检查其运行时类型，但从您的设计中您知道它是什么。它应该是 TextBlock 或带有子文本块的一些UI元素（我不知道你的确切设计，因为你没有共享任何代码，但你应该知道它） 。这样，您来到 TextBlock 的实例，因此您可以使用属性 TextBlock.Text 提取文本。这就是全部。



请参阅：

http://msdn.microsoft.com/en-us/library/system.windows.controls.listbox.aspx [ ^ ]，

http://msdn.microsoft.com/en-us/ library / system.windows.controls.primitives.selector.selectedindex.aspx [ ^ ]，

http://msdn.microsoft.com/en-us/library/system.windows.controls.primitives.selector.selecteditem.aspx [ ^ ]

http://msdn.microsoft.com/en-us/library/ system.windows.controls.listbox.selecteditems.aspx [ ^ ]，

http://msdn.microsoft.com/en-us/library/system.windows.controls.primitives.selector.selectedvalue.aspx [ ^ ]，

http://msdn.microsoft.com/ EN-US /李brary / system.windows.controls.textblock.aspx [ ^ ]，

http://msdn.microsoft.com/en-us/library/system.windows.controls.textblock.text.aspx [ ^ ]。

-SA

If the list box is multi-selectable, you can use the property SelectedItems, otherwise you can use the property SelectedItem, SelectedValue or SelectedIndex. You will come to the item reference, which can actually be of any type, not just string, so the compile-time type of the returned object is System.Object; you can check up its runtime type, but from your design your know what is it. It should be either TextBlock or some UI elements with to child text blocks (I don't know you exact design as you did not share any code, but you should know it). This way, you come to the instance of TextBlock, so you can extract the text using the property TextBlock.Text. That's all.

Please see:
http://msdn.microsoft.com/en-us/library/system.windows.controls.listbox.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.controls.primitives.selector.selectedindex.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.controls.primitives.selector.selecteditem.aspx[^]
http://msdn.microsoft.com/en-us/library/system.windows.controls.listbox.selecteditems.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.controls.primitives.selector.selectedvalue.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.controls.textblock.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.controls.textblock.text.aspx[^].

—SA

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