Richtextbox中的画线问题 [英] Problem with drawline in Richtextbox

问题描述

亲爱的所有人，

我尝试在richtextbox中画一条线，并且成功绘制了这条线，但是每当我滚动richtextbox并回到这条线时，我发现它丢失了，这里是我用来画线的代码:

Dear all,

I have tried to draw a line in a richtextbox and i have successfully draw the line but whenever i scroll the richtextbox and go back to the line i found it missing here is the code i am using to draw line:

private void DrawLineInRichtextbox(RichTextBox rtb, Point p1)
{
     Pen pen = new Pen(Color.Black);
     Graphics graphics;
     graphics = richTextBox2.CreateGraphics();
     graphics.DrawLine(pen, p1.X, p1.Y, rtb.Width, p1.Y);
     pen.Dispose();
     graphics.Dispose();
}

请告诉我darawline有什么问题，我需要在richtextbox中添加永久行.

在此先感谢
Suheb Ahmad
新德里
INDIA

Pleas tell me what is wrong with the darawline i need a permanent line in richtextbox.

Thanks in advance
Suheb Ahmad
New Delhi
INDIA

推荐答案

嗯，也许您需要在顶部添加一个重绘"事件处理程序或创建自定义线对象

〜TheArch

Hmm, Perhaps you need top add a ''redraw'' event handler to the ligh or create a custom line object

~TheArch

尝试将您的代码放入OnDraw()方法中
我以为你用的是VC ++

Try to put your code inside the OnDraw() method
I supposed that you use VC++

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