1. streamwriter -檔案寫入類streamwriter s = new streamwriter(address + "
/menu.ini
", true
);s.writeline(openfiledialog1.filename);
s.flush();
s.close();
2. streamreader -檔案讀取類
streamreader sr = new streamreader(address + "
/menu.ini");
while (sr.peek()>=0
)sr.close();
3. image -影象類
image p = image.fromfile("
/背景.jpg");
form f = new form(); //
建立mid視窗
f.mdiparent = this; //
設定父視窗
f.backgroundimage = p; //
設定mdi視窗的背景圖
f.show(); //
顯示mdi視窗
4. bitmap -點陣圖類
//建立位圖, bitmap類繼承於image類
bitmap bit;
bit = new bitmap("
heart.bmp");
bit.maketransparent(color.white);
//設定透明色
protected
override
void
onpaint(painteventargs e)
5. this.opacity -控制項的不透明度
//控制控制項透明程度，很有用。
6. c#中匯入dll檔案中的api
[system.runtime.interopservices.dllimportattribute(
"user32.dll")]
public
static
extern
bool flashwindow(intptr handle, bool
binvert); 7
. 隱藏標題欄
this.controlbox = false;
8. 視窗始終處於最上面
this.topmost =ture;
9. screen -桌面類
screen.primaryscreen.workingarea.height
//桌面的高
screen.primaryscreen.workingarea.width //
桌面的寬
screen.primaryscreen.bitsperpixel //
桌面的位深
10. 基本繪圖
graphics graphics;
pen mypen = new pen(color.blue, 2);
//畫線
graphics = this
.creategraphics();
graphics.drawline(mypen,
30, 60, 150, 60);
//畫矩形
graphics = this
.creategraphics();
graphics.drawrectangle(mypen,
30, 80, 120, 50);
//畫橢圓
graphics = this
.creategraphics();
rectangle myrectangle = new rectangle(160, 70, 100, 60
);graphics.drawellipse(mypen, myrectangle); 11
. 獲得滑鼠在視窗中的座標
cursor.clip = new rectangle(this.location, this
.size);
label1.text = "
當前滑鼠的位置為：
" +cursor.position; 12
. 判斷鍵盤
protected
override
bool processcmdkey(ref
message msg, keys keydata)
messagebox.show(strinfo, "資訊
", messageboxbuttons.ok, messageboxicon.information);
}return
base.processcmdkey(ref
msg, keydata);}
13. 控制遠端計算機
//首先新增對 system.management的引用
private
void closecomputer(string strname,string strpwd,string ip,string
doinfo)
; mobj.invokemethod(doinfo, str);
}messagebox.show(
"操作成功");
}catch
(exception ey)}
//重啟遠端計算機
closecomputer(this.textbox2.text, this.textbox3.text, this.textbox1.text, "
reboot");
//關閉遠端計算機
closecomputer(this.textbox2.text, this.textbox3.text, this.textbox1.text, "
shutdown");
14. ping的使用
ping pinginfo = new
ping();
pingoptions pingopt = new
pingoptions();
pingopt.dontfragment = true
;string myinfo = "
hyworkhyworkhyworkhyworkhyworkhywork";
byte bufferinfo =encoding.ascii.getbytes(myinfo);
int timeout = 120
;pingreply reply = pinginfo.send(this
.textbox1.text, timeout, bufferinfo, pingopt);
if (reply.status ==ipstatus.success)
else 15
. 檢查檔案是否存在
public
int checkfileexit(string
objfilepath)
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