Question

C# DrawToBitmap截取from图的问题，不要推荐我用API！！

截取form窗体的代码：
Bitmap formBitmap = new Bitmap(this.Width, this.Height);
this.DrawToBitmap(formBitmap, new Rectangle(0, 0, this.Width, this.Height));
formBitmap.Save(@"d:\form.bmp", ImageFormat.Bmp);
但是这个代码截取出来有标题栏在里面，怎么能做到一截就把标题栏去掉，只截form的工作区域？？？？先声明，用this.ClientSize.Width一样不行，还是有工作区域！！

Answer 1

Bitmap sourceBitmap = new Bitmap(this.Width, this.Height);
this.DrawToBitmap(sourceBitmap, new Rectangle(0, 0, this.Width, this.Height));
sourceBitmap.Save(@"d:\form2.bmp");

Bitmap resultBitmap = new Bitmap(this.Width, this.ClientSize.Height);
Graphics gr = Graphics.FromImage(resultBitmap);
Rectangle sourceRectangle = new Rectangle(0, this.Height - this.ClientSize.Height, this.Width, this.ClientSize.Height);
Rectangle resultRectangle = new Rectangle(0, 0, this.Width, this.ClientSize.Height);
gr.DrawImage(sourceBitmap, resultRectangle, sourceRectangle, GraphicsUnit.Pixel);//截取图片中的一部分
resultBitmap.Save(@"d:\form.bmp");

Answer 2

this.DrawToBitmap(formBitmap,new Rectangle(0,0,this.Width,this.Height));
//修改成this.DrawToBitmap(formBitmap,new Rectangle(0,30,this.Width,this.Height)); 试试

Answer 3

工作区域的矩形应该为
Rectangle(0, this.Height - this.Bottom, this.Width, this.Height)

this.Bottom的描述为：获取控件下边缘与其容器的工作区上边缘之间的距离（以像素为单位）。

Done