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comboBoxItem1.Items.Add("24"); //ÕâÑù¼´¿É¡£
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C#ÀûÓÃwebrequest¼ÆËã´ýÏÂÔØµÄÎļþ´óС
string URL = textBox1.Text;
string filetype = URL.Substring(URL.LastIndexOf(".") + 1, (URL.Length - URL.LastIndexOf(".") - 1));
filetypevalue.Text = filetype.ToUpper();
string filename = URL.Substring(URL.LastIndexOf("/") + 1, (URL.Length - URL.LastIndexOf("/") - 1));
namelabel.Text = filename;
System.Net.WebRequest req = System.Net.HttpWebRequest.Create(textBox1.Text);
req.Method = "HEAD";
System.Net.WebResponse resp = req.GetResponse();
long ContentLength = 0;
long result;
if (long.TryParse(resp.Headers.Get("Content-Length"), out ContentLength))
{
string File_Size;


if (ContentLength >= 1073741824)
{
result = ContentLength / 1073741 ......

C#±à³ÌˮƽµÄ50¸öÒªµã

1.×ÜÊÇÓÃÊôÐÔ (Property) À´´úÌæ¿É·ÃÎʵÄÊý¾Ý³ÉÔ±
2.ÔÚ  readonly ºÍ const Ö®¼ä£¬ÓÅÏÈʹÓà readonly
3.ÔÚ as ºÍ Ç¿ÖÆÀàÐÍת»»Ö®¼ä£¬ÓÅÏÈʹÓà as ²Ù×÷·û
4.ʹÓÃÌõ¼þÊôÐÔ (Conditional Attributes) À´´úÌæÌõ¼þ±àÒëÓï¾ä #if
5.×ÜÊÇΪ×Ô¶¨ÒåÀàÖØÔØ ToString ·½·¨
6.Çø±ðÖµÀàÐͺÍÒýÓÃÀàÐÍ
7.ʹÓò»¿É±äµÄÖµÀàÐÍ(Immutable Atomic Value Types)
8.ÔÚÖµÀàÐÍÖУ¬È·±£0ÊÇÒ»¸öºÏ·¨µÄÊý¾Ý
9.Àí½â ReferenceEquals, static Equals, instance Equals ºÍ ±È½ÏÔËËã·û(==)Ö®¼äµÄ¹ØÏµ
10.Àí½â GetHashCode·½·¨µÄȱÏÝ
11.ÔÚ±àдѭ»·Ê±£¬ÓÅÏÈʹÓà foreach.
12.ÔÚ¶¨Òå±äÁ¿µÄʱºò¾Í½«Æä³õʼ»¯
13.ʹÓþ²Ì¬¹¹Ô캯ÊýÀ´³õʼ»¯¾²Ì¬³ÉÔ±±äÁ¿
14.Óöà¸ö¹¹Ô캯Êýʱ£¬ÀûÓù¹Ô캯ÊýÁ´
15.ʹÓÃusingºÍtry/finallyÀ´´¦Àí×ÊÔ´µÄÊÍ·Å
16.¾¡Á¿±ÜÃâ²úÉú×ÊÔ´À¬»ø
17.¾¡Á¿±ÜÃâʹÓÃ×°Ïä(boxing)ºÍ²ðÏä(unboxing)
18.ʵÏÖÀàµÄ Dispose ·½·¨
19.Ôڽӿںͼ̳Ð(Inheritance)Ö®¼ä£¬ÓÅÏÈʹÓýӿÚ(interface)
20.Çø·Ö½Ó¿ÚºÍÖØÔØ(overrides)
21.ÓÃίÍÐ(delegate)À´ÊµÏֻص÷(callback)
22.ÓÃʼþ(event)À´¶¨ÒåÍⲿ½Ó¿Ú
23.±ÜÃâ·µ»ØÀàÄÚ²¿³ÉÔ±µÄÒýÓÃ
24.ʹÓÃÔªÊý¾ÝÀ´¿ØÖƳÌÐò
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bmp = new Bitmap(Application.StartupPath + "\\1.jpg");
            Bitmap bmp2 = (Bitmap)bmp.Clone();
            int width = bmp2.Width;
            int height = bmp2.Height;
            Rectangle rect = new Rectangle(0, 0, width, height);
            //ÓÿɶÁдµÄ·½Ê½Ëø¶¨È«²¿Î»Í¼ÏñËØ
            BitmapData bmpData = bmp2.LockBits(rect, ImageLockMode.ReadWrite, bmp2.PixelFormat);
            //µÃµ½Ê×µØÖ·
   &n ......

c#¼Ì³Ð¸¸À༼ÇÉ,²¢Ôö¼ÓеÄʵÏÖ

1 ¸¸Àà  partial class FormBillTemplet:Form
        /// <summary>
        /// Ðµ¥
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        public  virtual   void  tsButtonNewBill_Click(object sender, EventArgs e)
        {
           Messagebox.Show("¸¸Ç×Àà")
        }
2¡¢ ×ÓÀà
  public partial class Form3 : MMS.Public.Controls .FormBillTemplet
 public override void tsButtonNewBill_Click(object sender, EventArgs e)
        {
           ba ......
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