如何通过C#实现qq屏幕截图程序？
因为近来想写个类似于远程桌面监控的程序,该程序中要用到屏幕捕捉.为实现该程序的一部分功能,做了个小DEMO.程序很简单，用到的技术也不多，只能实现类似qq的截图功能(方法虽然很笨)
程序流程如下：
1.截取整个屏幕并保存
2.新开一个全屏窗口,将保存的屏幕作为背景
3.鼠标拖动改变截取范围,右键取消
4.双击截取,保存在粘贴板,全屏窗口关闭
好了,下面的是代码部分
首先新建一个项目ScreenCutter(VS2005),将窗体名改为MainForm,再新建一个窗体ScreenBody.
添加一个按钮btnCutter到ScreenCutter并添加按钮事件:
privatevoidbtnCutter_Click(objectsender,EventArgse)
{
Imageimg=newBitmap(Screen.AllScreens[0].Bounds.Width,Screen.AllScreens[0].Bounds.Height);
Graphicsg=Graphics.FromImage(img);
g.CopyFromScreen(newPoint(0,0),newPoint(0,0),Screen.AllScreens[0].Bounds.Size);
ScreenBodybody=newScreenBody();
body.BackgroundImage=img;
body.Show();
}
Screen.AllScreens[0]是获取当前所有设备窗口的第一个,我这里只有一个显示器,当然我就是第一个.{
Imageimg=newBitmap(Screen.AllScreens[0].Bounds.Width,Screen.AllScreens[0].Bounds.Height);
Graphicsg=Graphics.FromImage(img);
g.CopyFromScreen(newPoint(0,0),newPoint(0,0),Screen.AllScreens[0].Bounds.Size);
ScreenBodybody=newScreenBody();
body.BackgroundImage=img;
body.Show();
}
利用Graphics的CopyFromScreen函数获取当前屏幕.
好了,现在按下按钮全屏窗口就会出来了.
下面讲全屏窗口ScreenBody,首先设置窗体的FormBorderStyle为None,然后声明以下变量
privateGraphicsMainPainter; //主画笔
privatePenpen; //就是笔咯
privateboolisDowned; //判断鼠标是否按下
privateboolRectReady; //矩形是否绘制完成
privateImagebaseImage; //基本图形(原来的画面)
privateRectangleRect; //就是要保存的矩形
privatePointdownPoint; //鼠标按下的点
inttmpx;
inttmpy;
privatePenpen; //就是笔咯
privateboolisDowned; //判断鼠标是否按下
privateboolRectReady; //矩形是否绘制完成
privateImagebaseImage; //基本图形(原来的画面)
privateRectangleRect; //就是要保存的矩形
privatePointdownPoint; //鼠标按下的点
inttmpx;
inttmpy;
之后就是窗体的鼠标函数了,里面很多代码都没有作出整理,看了一下,整理后的代码应该会更少更精简的
privatevoidScreenBody_DoubleClick(objectsender,EventArgse)
{
if(((MouseEventArgs)e).Button==MouseButtons.Left&&Rect.Contains(((MouseEventArgs)e).X,((MouseEventArgs)e).Y))
{
//保存的时候有很多种方法的......我这里只用了这种
Imagememory=newBitmap(Rect.Width,Rect.Height);
Graphicsg=Graphics.FromImage(memory);
g.CopyFromScreen(Rect.X+1,Rect.Y+1,0,0,Rect.Size);
Clipboard.SetImage(memory);
this.Close();
}
}
privatevoidScreenBody_MouseDown(objectsender,MouseEventArgse)
{
if(e.Button==MouseButtons.Left)
{
isDowned=true;
if(RectReady==false)
{
Rect.X=e.X;
Rect.Y=e.Y;
downPoint=newPoint(e.X,e.Y);
}
if(RectReady==true)
{
tmpx=e.X;
tmpy=e.Y;
}
}
if(e.Button==MouseButtons.Right)
{
if(RectReady!=true)
{
this.Close();
return;
}
MainPainter.DrawImage(baseImage,0,0);
RectReady=false;
}
}
privatevoidScreenBody_MouseUp(objectsender,MouseEventArgse)
{
if(e.Button==MouseButtons.Left)
{
isDowned=false;
RectReady=true;
}
}
privatevoidScreenBody_MouseMove(objectsender,MouseEventArgse)
{
if(RectReady==false)
{
if(isDowned==true)
{
ImageNew=DrawScreen((Image)baseImage.Clone(),e.X,e.Y);
MainPainter.DrawImage(New,0,0);
New.Dispose();
}
}
if(RectReady==true)
{
if(Rect.Contains(e.X,e.Y))
{
//this.Cursor=Cursors.Hand;
if(isDowned==true)
{
//和上一次的位置比较获取偏移量
Rect.X=Rect.X+e.X-tmpx;
Rect.Y=Rect.Y+e.Y-tmpy;
//记录现在的位置
tmpx=e.X;
tmpy=e.Y;
MoveRect((Image)baseImage.Clone(),Rect);
}
}
}
}
privatevoidScreenBody_Load(objectsender,EventArgse)
{
this.WindowState=FormWindowState.Maximized;
MainPainter=this.CreateGraphics();
pen=newPen(Brushes.Blue);
isDowned=false;
baseImage=this.BackgroundImage;
Rect=newRectangle();
RectReady=false;
}
辅助函数
本来应该写更多的辅助函数的,将窗体响应函数里面的代码放到里面来,不过本人很懒,就这样将就了.呵呵
privatevoidDrawRect(GraphicsPainter,intMouse_x,intMouse_y)
{
intwidth=0;
intheigth=0;
if(Mouse_y<Rect.Y)
{
Rect.Y=Mouse_y;
heigth=downPoint.Y-Mouse_y;
}
else
{
heigth=Mouse_y-downPoint.Y;
}
if(Mouse_x<Rect.X)
{
Rect.X=Mouse_x;
width=downPoint.X-Mouse_x;
}
else
{
width=Mouse_x-downPoint.X;
}
Rect.Size=newSize(width,heigth);
Painter.DrawRectangle(pen,Rect);
}
privateImageDrawScreen(Imageback,intMouse_x,intMouse_y)
{
GraphicsPainter=Graphics.FromImage(back);
DrawRect(Painter,Mouse_x,Mouse_y);
returnback;
}
privatevoidMoveRect(Imageimage,RectangleRect)
{
GraphicsPainter=Graphics.FromImage(image);
Painter.DrawRectangle(pen,Rect.X,Rect.Y,Rect.Width,Rect.Height);
DrawRects(Painter);
MainPainter.DrawImage(image,0,0);
image.Dispose();
}
到这里,代码就算是写完了,运行
截取结果,这里截取的边界没有控制好,所以还有边界可以见到,稍微设置一下就可以了
好了,这个东东就这样搞完了，接下来要做利用钩子的了....希望能够快点完成,累呀~~~~
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