RichTextBox中的MeasureString问题 [英] MeasureString in RichTextBox Problem

问题描述

当垂直的scroolbar变得可见时，我需要得到rtb的最后一行。



WordWrap是真的



我已经有一个方法告诉我什么时候scroolbar变得可见。



我测量了最后一行的字符串并将其与宽度相比>更大的一切都在最后一行。我的问题是，当它到达中间位置时，它说它已经到了最后。



继承我的代码：

I need to get the last line of a rtb when the vertical scroolbar becomes visible.

WordWrap is true

I allready have a methode which tells me when the scroolbar becomes visible.

I measured the string of the last line and compared it to the width > everything which is bigger is in the last line. My Problem is, that when it reaches about the middle, it says it allready reached the end.

Heres my code:

float sum = 0;
int zeichen = 0;
Graphics g = rtb.CreateGraphics();
g.PageUnit = GraphicsUnit.Pixel;
for (int i = 0; i < rtb.Lines[rtb.Lines.Length - 1].Length && sum < rtb.Width; i++)
{
    zeichen = i;
    rtb.Select(rtb.GetFirstCharIndexFromLine(rtb.Lines.Length - 1) + i, 1);
    sum = sum + g.MeasureString(rtb.SelectedText, rtb.SelectionFont).Width;
}
string s = rtb.Text.Substring(zeichen);
rtb.Text = rtb.Text.Substring(0, zeichen);

SelectionFont = new System.Drawing.Font（Agency FB，10）



rtb.width = 605



谢谢：）

SelectionFont = new System.Drawing.Font("Agency FB", 10)

rtb.width = 605

Thanks :)

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