我在Page_Load函数中用以下代码画图,结果什么都没画出来。Bitmap bm = new Bitmap(600, 300);
Graphics g;
g = Graphics.FromImage(bm);
g.Clear(Color.Yellow);
g.DrawLine(Pens.Black, new Point(100, 100), new Point(200, 200));页面上一片空白~~不知道是什么原因~~请大侠赐教!
Graphics g;
g = Graphics.FromImage(bm);
g.Clear(Color.Yellow);
g.DrawLine(Pens.Black, new Point(100, 100), new Point(200, 200));页面上一片空白~~不知道是什么原因~~请大侠赐教!
Graphics g;
g = Graphics.FromImage(bm);
g.Clear(Color.Yellow);
g.DrawLine(Pens.Black, new Point(100, 100), new Point(200, 200));
System.IO.MemoryStream ms = new System.IO.MemoryStream();
bm.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
Response.ContentType = "image/Gif";
Response.BinaryWrite(ms.ToArray());