我有以下场景，我认为会有一个简单的解决方案，但我很困惑...
我构建了一个 WPF 用户控件，其中包含一组数字按钮和一个 TextBlock 来记录已选择的按钮。当用户控件打开时，TextBlock 为空。选择按钮后，其代表的数字将附加到所显示文本的右侧。
我需要的是一种解决方案，其中数字不断附加在右侧，如果这导致超出 TextBlock 的固定可显示大小，则会删除最左侧的字符。实际上，我追求的是一次一个角色的品牌效应。
我无法使用滚动条。任何想法都会受到欢迎
I have the following scenario which I thought would have a simple solution, but I'm stumped...
I have constructed a WPF user control with a set of numeric Buttons and a TextBlock to record what buttons have been selected. When the user control opens, the TextBlock is empty. As a button is selected, the digit it represents is appended to the right-hand-side of the displayed text.
What I need is a solution where the digits keep getting appended on the right-hand-side and if that results in exceeding the fixed displayable size of the TextBlock dropping the left-most character. In effect I am after a one-character-at-a-time marque effect.
I can not use scroll bars. Any thoughts would be welcome
发布评论
评论（2）
数据绑定是你的朋友。
假设你有一个 ViewModel。在 ViewModel 中，您获得了一个绑定到 TextBlock Text 属性的 string 属性。
现在，您只需使用常规 C# 字符串方法在 ViewModel 中操作该字符串即可正确显示。
HTH
阿里尔
Databindings are you friend here.
suppose you got a ViewModel. and in the ViewModel you got a property of string which is binded to the TextBlock Text propetry.
Now you only need to manipulate that string inside the ViewModel using regular c# string methods to display correctly.
HTH
Ariel
TextBlock 级别没有什么特别的...只需使用 string.SubString。
更新：这段代码应该可以解决问题：
There's nothing special at the TextBlock level... Just pass it the string that is formatted correctly using something like string.SubString.
UPDATE: This code should do the trick: