计算文本框中的换行 [英] Count wrapped lines in a textbox

问题描述

我在文本框"中只有一行文本，并且被多行换行，如何不计算文本框"中的换行数?

I have a single line of text in a Text Box and that is wrapped to many lines, how to count no of wrapped lines in Text Box?

推荐答案

您可以使用 String.Split :

int lineCount = txt.Text.Split(new[] { '\n', 'r' }, StringSplitOptions.None).Length;

如果它是winforms TextBox ，则还可以使用 Lines 属性:

If it's a winforms TextBox you can also use the Lines property:

int lineCount = txt.Lines.Length;

所以是VB.NET:

Dim lineCount = txt.Text.Split({vbLf, vbCr}, StringSplitOptions.None).Length

更新:也许我的理解是错误的，您想计算UI元素(如 TextBox )包裹单行文本的行数".那么以上当然是行不通的.

Update: Maybe my understanding was wrong and you want to count the "lines" that the UI-element (like the TextBox) wrapped your single-line text. Then above doesn't work of course.

您可以使用

You could use Text.GetLineFromCharIndex:

Dim lineCount = txt.GetLineFromCharIndex(txt.Text.Length - 1)

我必须承认我之前不知道 GetLineFromCharIndex ，但是它似乎可以正常工作.我输入了很长的单行文本，行数为23.减小文本框的宽度后，其宽度已更改为40.

I must admit that i didnt know GetLineFromCharIndex before, but it seems to work as expected. I have entered a long single line text and the linecount was 23. After i've reduced the width of the textbox it has changed to 40.

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