如何保持在一个标签控件一个图片的图形描绘切换到选项卡，并返回到选项卡1之后？ [英] How to kept a graphic drawing in a picturebox on a tab control after switching to tab 2 and return to tab 1?

问题描述

我有一个选项卡控件有两个（2）选项卡。该选项卡1在做一个图片框绘图（图片框是可选的，我可以直接绘制到标签），使用图形Addline。第二个标签打开网络浏览器。一切工作正常。我可以使图形中的第一个选项卡，但是当我切换到第二个选项卡，并返回到第一个选项卡，绘图消失，如果我回到标签2我可以看到我正在看的网页浏览器。我需要保持在图中的标签1，所以当我回到它，我可以看到它。下面是我使用的标签1绘制代码：

I have a Tab Control with two (2) Tabs. The Tab 1 does a drawing in a picture box (the picture box is optional, I can draw directly to the tab) using Graphics Addline. The second tab opens a web browser. Everything is working fine. I can make the drawing in the first tab but when I switch to the second tab and return to the first tab, the drawing disappear and if I return to tab 2 I can see what I was watching in the web browser. I need to kept the drawing in the tab 1 so when I return to it I can see it. Here is the code I'm using to draw in the tab 1:

私人无效DataLoaded（参考字符串strFileName）// strFileName有数据需要绘图。
{

private void DataLoaded(ref string strFileName) //strFileName has the data need for the drawing. {

图形G = this.pictureBox1.CreateGraphics（）;

Graphics g = this.pictureBox1.CreateGraphics();

笔黑色=新笔（Color.Black，5）;

Pen black = new Pen(Color.Black, 5);

笔绿色=新朋（Color.Green，5）;

Pen green = new Pen(Color.Green, 5);

列表xpoints =新名单（）;

List xpoints = new List();

列表ypoints中=新名单（）;

List ypoints = new List();

g.TranslateTransform（350，350）;

g.TranslateTransform(350, 350);

g.DrawLine（绿色，新点（Convert.ToInt32（X1），Convert.ToInt32（Y1）），新点（Convert.ToInt32（X2），Convert.ToInt32（ Y2）））;

g.DrawLine(green, new Point(Convert.ToInt32(X1), Convert.ToInt32(Y1)), new Point(Convert.ToInt32(X2), Convert.ToInt32(Y2)));

的for（int i = 2; I< xpoints.Count（）;我++）{

for (int i = 2; i < xpoints.Count(); i++){

            g.DrawLine(black, new Point(Convert.ToInt32(X1), Convert.ToInt32(Y1)), new Point(Convert.ToInt32(X2), Convert.ToInt32(Y2))); 

            X1 = X2;                                            
            Y1 = Y2;                                            

            X2 = xpoints[i];                                    
            Y2 = ypoints[i];                                   

        }// end of for 

结束

}

}

我甚至试图做使用painteventarg，但其不工作的绘图。它帮助我一点，因为当我变回选项卡1和移动鼠标在它再次提请线的标签。谁能帮我这个？我甚至用this.picturebox1.Invalidate（），但没有试过。就像我说的，我需要的是：保留在选项卡1绘图切换到选项卡，所以当我回到标签1线条后出现。在此先感谢您的帮助！

I even tried to do the drawing using the painteventarg but its not working at all. It helped me a bit because when I change back to the tab 1 and move the mouse over the tab it draws again the lines. Can anyone help me with this?? I even tried using this.picturebox1.Invalidate() but nothing. Like I said, what I need is: Preserve the drawing in tab 1 after switching to tab 2 so when I returned to tab 1 the lines are there. Thanks in advance for the help!!!.

推荐答案

它做的，我只是用位图绘制到它和集与位图PictureBox的图片

Its done, I just used a Bitmap to draw to it and the set the picturebox image with the bitmap.

下面是我使用的代码：

位图图像=新位图（ pictureBox1.Width，pictureBox1.Height）;
图形G = Graphics.FromImage（图像）;

Bitmap image = new Bitmap(pictureBox1.Width, pictureBox1.Height); Graphics g = Graphics.FromImage(image);

//在所有提取数据并做抽奖所需的代码之间

// In between all the code required for extracting the data and do the draw.

pictureBox1.Image =图像;

pictureBox1.Image = image;

感谢反正谁看见了我的问题，并试图回答这个问题。

Thanks anyway to whoever saw my question and try to answer it.

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