RichTextBox в Visual Studio

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C#

"Can you tell how to determine numbers of lines which currently are visible in RichTextBox?"

Posted 29-Feb-12 2:14am

Andy1828

Updated 29-Feb-12 2:36am

v4

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Syed Salman Raza Zaidi 29-Feb-12 8:15am

Не могли бы вы подробнее рассказать или поделиться некоторыми из вас код??

[no name] 29-Feb-12 8:15am

This is an English language forum. If you need help, please use an online transaltor to translate your question.

2 solutions

Solution 2

and how about this one:

C#

int charCount;
int lineCount;
this.CreateGraphics().MeasureString(
    richTextBox1.Text, 
    richTextBox1.Font,
    new SizeF(richTextBox1.Width, richTextBox1.Height),
    new StringFormat(StringFormatFlags.FitBlackBox), 
    out charCount, 
    out lineCount);

the lineCount-1 value seems to be the correct visible lines count

Posted 29-Feb-12 3:17am

Quintain

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Andy1828 29-Feb-12 11:09am

Thanks, but really, I needed the screen string to work with.

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OriginalGriff · Accepted Answer · 2012-02-29T02:39:00

Solution 1

Not nice, but...
Try this:

C#

int top = myRichTextBox.GetCharIndexFromPosition(new Point(1, 1));
int bottom = myRichTextBox.GetCharIndexFromPosition(new Point(1, myRichTextBox.Height - 1));

int topLine = myRichTextBox.GetLineFromCharIndex(top);
int bottomLine = myRichTextBox.GetLineFromCharIndex(bottom);

int linesDisplayed = bottomLine - topLine;
Console.WriteLine("{0}:{1} = {2}", topLine, bottomLine, linesDisplayed);

Posted 29-Feb-12 2:39am

OriginalGriff

Comments

Andy1828 29-Feb-12 9:09am

It works! I believe it is the best decision. Thank you!

OriginalGriff 29-Feb-12 9:18am

You're welcome!

ProEnggSoft 29-Feb-12 11:03am

Good answer. My 5.