把网络数据流转换成图片类

  
    

   
     
 1 
   
     public
   
      
   
     void
   
      GetImageSize(
   
     string
   
      FullFileName, 
   
     int
   
      intPrintImageHeight, 
   
     int
   
      intPrintImageWidth, 
   
     ref
   
      
   
     int
   
      intmageHeight, 
   
     ref
   
      
   
     int
   
      intImageWidth)

   
      2 
   
     {

   
      3 
   
      
   
     //
   
     Dim oImage As Image = Nothing

   
      4 
   
      
   
     //
   
     oImage = Image.FromFile(FullFileName.Replace("/", "\").Replace("http:\\", ""))

   
      5 
   
     

   
      6 
   
      
   
     //
   
     Dim bytes As Byte() = New System.Net.WebClient().DownloadData("")
   
     

   
      7 
   
      
   
     

   
      8 
   
      WebRequest webRequest__1 
   
     =
   
      WebRequest.Create(FullFileName);

   
      9 
   
      WebResponse webResponse 
   
     =
   
      webRequest__1.GetResponse();

   
     10 
   
      Bitmap oImage 
   
     =
   
      
   
     new
   
      Bitmap(webResponse.GetResponseStream());

   
     11 
   
      
   
     //
   
     intImageWidth = myImage.Width

   
     12 
   
      
   
     //
   
     intmageHeight = myImage.Height
   
     

   
     13 
   
     
   
     

   
     14 
   
      
   
     try
   
      {

   
     15 
   
      
   
     if
   
      (oImage.Width 
   
     >
   
      intPrintImageWidth 
   
     &&
   
      oImage.Height 
   
     >
   
      intPrintImageHeight) {

   
     16 
   
      
   
     if
   
      ((intPrintImageWidth 
   
     /
   
      oImage.Width) 
   
     <
   
      (intPrintImageHeight 
   
     /
   
      oImage.Height)) {

   
     17 
   
      intImageWidth 
   
     =
   
      intPrintImageWidth;

   
     18 
   
      intmageHeight 
   
     =
   
      Conversion.Int(oImage.Height 
   
     *
   
      intPrintImageWidth 
   
     /
   
      oImage.Width);

   
     19 
   
      } 
   
     else
   
      {

   
     20 
   
      intImageWidth 
   
     =
   
      Conversion.Int(oImage.Width 
   
     *
   
      intPrintImageHeight 
   
     /
   
      oImage.Height);

   
     21 
   
      intmageHeight 
   
     =
   
      intPrintImageHeight;

   
     22 
   
      }

   
     23 
   
      } 
   
     else
   
      
   
     if
   
      (oImage.Width 
   
     >
   
      intPrintImageWidth) {

   
     24 
   
      intImageWidth 
   
     =
   
      intPrintImageWidth;

   
     25 
   
      intmageHeight 
   
     =
   
      Conversion.Int(oImage.Height 
   
     *
   
      intPrintImageWidth 
   
     /
   
      oImage.Width);

   
     26 
   
     

   
     27 
   
      } 
   
     else
   
      
   
     if
   
      (oImage.Height 
   
     >
   
      intPrintImageHeight) {

   
     28 
   
      intImageWidth 
   
     =
   
      Conversion.Int(oImage.Width 
   
     *
   
      intPrintImageHeight 
   
     /
   
      oImage.Height);

   
     29 
   
      intmageHeight 
   
     =
   
      intPrintImageHeight;

   
     30 
   
      } 
   
     else
   
      {

   
     31 
   
      intImageWidth 
   
     =
   
      oImage.Width;

   
     32 
   
      intmageHeight 
   
     =
   
      oImage.Height;

   
     33 
   
      }

   
     34 
   
     

   
     35 
   
      } 
   
     catch
   
      (Exception ex) {

   
     36 
   
      
   
     throw
   
      (ex);

   
     37 
   
      } 
   
     finally
   
      {

   
     38 
   
      
   
     if
   
      (oImage 
   
     !=
   
      
   
     null
   
     ) {

   
     39 
   
      oImage.Dispose();

   
     40 
   
      oImage 
   
     =
   
      
   
     null
   
     ;

   
     41 
   
      }

   
     42 
   
      }

   
     43 
   
     

   
     44 
   
     

   
     45 
   
     }




  
    

验证是否图片存在

   
     

    
      public
    
       
    
      int
    
       GetUrlExistError(
    
      string
    
       url)
{
 
    
      int
    
       num 
    
      =
    
       
    
      0
    
      ;
 
    
      if
    
       (url.Length 
    
      >
    
       
    
      1
    
      ) {
 HttpWebRequest request 
    
      =
    
       (HttpWebRequest)WebRequest.Create(
    
      new
    
       Uri(url));
 ServicePointManager.Expect100Continue 
    
      =
    
       
    
      false
    
      ;
 
    
      try
    
       {
 ((HttpWebResponse)request.GetResponse()).Close();
 } 
    
      catch
    
       (WebException exception) {
 
    
      if
    
       (exception.Status 
    
      !=
    
       WebExceptionStatus.ProtocolError) {
 
    
      return
    
       num;
 }
 
    
      if
    
       (exception.Message.IndexOf(
    
      "
    
      500 
    
      "
    
      ) 
    
      >
    
       
    
      0
    
      ) {
 
    
      return
    
       
    
      500
    
      ;
 }
 
    
      if
    
       (exception.Message.IndexOf(
    
      "
    
      401 
    
      "
    
      ) 
    
      >
    
       
    
      0
    
      ) {
 
    
      return
    
       
    
      401
    
      ;
 }
 
    
      if
    
       (exception.Message.IndexOf(
    
      "
    
      404
    
      "
    
      ) 
    
      >
    
       
    
      0
    
      ) {
 
    
      return
    
       
    
      404
    
      ;
 }
 }
 num 
    
      =
    
       
    
      1
    
      ;
 }
 
    
      return
    
       num;
}