這兩天學習gdi，做了一些在pictruebox上面畫線，打點的操作。這裡的pictruebox的image的賦值只是把位址賦給imagelocation屬性this.picturebox1.imagelocation = openfiledialog.filename;，這樣是不是不可以儲存對的操作？難道只有先申明乙個bitmap，再把此bitmap賦值給pictruebox的image，還有待考究。這裡的**有點亂啊。
using system;
using system.collections.generic;
using system.componentmodel;
using system.data;
using system.drawing;
using system.drawing.imaging;
using system.drawing.drawing2d;
using system.linq;
using system.text;
using system.windows.forms;
using system.runtime.interopservices;
public form4()
private void button1_click(object sender, eventargs e)
}catch (exception ex)
}private void picturebox1_mousedown(object sender, mouseeventargs e)
if (e.button == mousebuttons.left)
line.add(new point(e.x, e.y));}}
private void picturebox1_mousemove(object sender, mouseeventargs e)
}}private void form4_load(object sender, eventargs e)
if(g==null)
}private void picturebox1_paint(object sender, painteventargs e)
else
if (pointcount != 0)}}
public void drawpoints(listpline, int nun, painteventargs e)
}else
if (i == pline.count() - 1 || i == 0)
}else if (len >= step)
len = 0;}}
}}public void drawpoint(point pl, painteventargs e)
else
}private void button2_click(object sender, eventargs e)
float zhi = 100;
private void button3_click(object sender, eventargs e)
}public void showresult(point p,float testvar)
else if (testvar >= 30 && testvar < 60)
else if (testvar >= 60 && testvar < 90)
else
}private void button4_click(object sender, eventargs e)}}
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