创建WPF水印纯XAML [英] Create WPF Watermark in Pure XAML

问题描述

这是一个登录屏幕上一个TextBox控件，其中包含文本框的用户名。我想文本框以下列方式进行：

This is for a TextBox control on a login screen, where the TextBox contains the username. I want the TextBox to perform in the following way:

• 在内容为空的内容应设置为用户名。

• When the content is empty the content should be set to "Username".

在点击文本框我想要的内容设置为
即;无关（除非内容已经被用户编辑）

When the TextBox is clicked I want the content to be set to "" i.e; nothing (unless the content has already been edited by the user).

这是一个pretty标准功能的今天，这样的事情字preSS登录（在页面顶部）。的 coudn't想到一个更好的例子比这恐怕：）的

This is a pretty standard feature nowadays, something like this wordpress login (at the top of page). coudn't think of a better example than this I'm afraid :)

所以，无论如何，我已经做到了这一点使用视图模型和它的作品很好，但我想知道这是可以做到的单纯从XAML结束。没有业务逻辑来讲，所以我认为这将是更好地做没有虚拟机。

So, anyway, I've already done this using a ViewModel and it works well, but I'd like to know if this can be done purely from the XAML end. No business logic is concerned so I think it would be better to do it without the VM.

推荐答案

查找下面的示例帮助你找到自己的方式。

Find the below samples help you to find your way.

<一个href=\"http://bendewey.word$p$pss.com/2008/09/27/wpf-shadowed-textbox-watermark/\">http://bendewey.word$p$pss.com/2008/09/27/wpf-shadowed-textbox-watermark/

<一个href=\"http://www.c-sharpcorner.com/uploadfile/rahul4_saxena/watermark-textbox-in-wpf/\">http://www.c-sharpcorner.com/uploadfile/rahul4_saxena/watermark-textbox-in-wpf/

<一个href=\"http://www.$c$cproject.com/Articles/26977/A-WatermarkTextBox-in-3-lines-of-XAML\">http://www.$c$cproject.com/Articles/26977/A-WatermarkTextBox-in-3-lines-of-XAML

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