fileUpload control in asp.net RSS

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  arunpulikkan

  Member

  265 Points

  151 Posts

  fileUpload control in asp.net

  Nov 28, 2006 04:44 AM|LINK

   

   hi 

             im using fileupload in my application and i have i installed in the server.when im using to access the application from client machine and try to uplaod a file im getting the error the file not found.here is the code for file uploading which i wrote in my application

   

  FileStream fStream = File.OpenRead(filepath);

  byte[] contents = new byte[fStream.Length];

  fStream.Read(contents, 0, (int)fStream.Length);

  fStream.Close();

  MemoryStream ms = new MemoryStream(contents);

   

   

  how can i solve his problem?????????

  Thanks,
  
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  pkellner

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  ASPInsiders

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  MVP

  Re: fileUpload control in asp.net

  Nov 28, 2006 06:16 AM|LINK

  Not sure what you are doing, but here is a working example.  Not all the api's I use are here, but you shoud be able to get the gist of it.

   

    // try grabbing the image specified
              FileUpload fileUpload = (FileUpload)CaptchaUltimateControl1.FindControl("FileUpload1");
              Byte[] smallerImageBytes = null;
              Byte[] imageBytes = null;
  
              try
              {
                  if (fileUpload != null && fileUpload.HasFile)
                  {
                      imageBytes = fileUpload.FileBytes;
                      if (imageBytes.Length > 1000000)
                      {
                          completionStatus = false;
                          completionMessage = "Image May not be over 1Meg, try again";
                      }
                      else
                      {
                          MemoryStream ms = new MemoryStream(imageBytes);
                          string fName = string.Empty;
                          if (!string.IsNullOrEmpty(fileUpload.FileName))
                          {
                              fName = fileUpload.FileName;
                          }
                          smallerImageBytes = CodeCampSV.Utils.ResizeFromStream(fName, CodeCampSV.Utils.ThumbSize, ms);
                          completionStatus = true;
                      }
                  }
              }
              catch (Exception eee)
              {
                  throw new ApplicationException(eee.ToString());
              }

   

  and here is the resize from stream stuff:

   public static byte[] ResizeFromByteArray(string fileName, int MaxSideSize, Byte[] byteArrayIn)
          {
              byte[] byteArray = null;  // really make this an error gif
              MemoryStream ms = new MemoryStream(byteArrayIn);
              byteArray = CodeCampSV.Utils.ResizeFromStream(fileName, MaxSideSize, ms);
  
  
  
              return byteArray;
          }

   

   

   public static byte[] ResizeFromStream(string fileName, int MaxSideSize, Stream Buffer)
          {
              byte[] byteArray = null;  // really make this an error gif
  
              try
              {
  
                 
  
  
                  Bitmap bitMap = new Bitmap(Buffer);
                  int intOldWidth = bitMap.Width;
                  int intOldHeight = bitMap.Height;
  
                  int intNewWidth;
                  int intNewHeight;
  
                  int intMaxSide;
  
                  if (intOldWidth >= intOldHeight)
                  {
                      intMaxSide = intOldWidth;
                  }
                  else
                  {
                      intMaxSide = intOldHeight;
                  }
  
                  if (intMaxSide > MaxSideSize)
                  {
                      //set new width and height
                      double dblCoef = MaxSideSize / (double)intMaxSide;
                      intNewWidth = Convert.ToInt32(dblCoef * intOldWidth);
                      intNewHeight = Convert.ToInt32(dblCoef * intOldHeight);
                  }
                  else
                  {
                      intNewWidth = intOldWidth;
                      intNewHeight = intOldHeight;
                  }
  
                  Size ThumbNailSize = new Size(intNewWidth, intNewHeight);
                  System.Drawing.Image oImg = System.Drawing.Image.FromStream(Buffer);
                  System.Drawing.Image oThumbNail = new Bitmap
                      (ThumbNailSize.Width, ThumbNailSize.Height);
                  Graphics oGraphic = Graphics.FromImage(oThumbNail);
                  oGraphic.CompositingQuality = CompositingQuality.HighQuality;
                  oGraphic.SmoothingMode = SmoothingMode.HighQuality;
                  oGraphic.InterpolationMode = InterpolationMode.HighQualityBicubic;
                  Rectangle oRectangle = new Rectangle
                      (0, 0, ThumbNailSize.Width, ThumbNailSize.Height);
  
                  oGraphic.DrawImage(oImg, oRectangle);
  
                  //string fileName = Context.Server.MapPath("~/App_Data/") + "test1.jpg";
                  //oThumbNail.Save(fileName, ImageFormat.Jpeg);
                  MemoryStream ms = new MemoryStream();
                  oThumbNail.Save(ms, ImageFormat.Jpeg);
                  byteArray = new byte[ms.Length];
                  ms.Position = 0;
                  ms.Read(byteArray, 0, Convert.ToInt32(ms.Length));
  
                  oGraphic.Dispose();
                  oImg.Dispose();
                  ms.Close();
                  ms.Dispose();
              }
              catch (Exception)
              {
                  int newSize = MaxSideSize - 20;
                  Bitmap bitMap = new Bitmap(newSize, newSize);
                  Graphics g = Graphics.FromImage(bitMap);
                  g.FillRectangle(new SolidBrush(Color.Gray), new Rectangle(0, 0, newSize, newSize));
  
                  Font font = new Font("Courier", 8);
                  SolidBrush solidBrush = new SolidBrush(Color.Red);
                  g.DrawString("Failed File", font, solidBrush, 10, 5);
                  g.DrawString(fileName, font, solidBrush, 10, 50);
  
                  MemoryStream ms = new MemoryStream();
                  bitMap.Save(ms, ImageFormat.Jpeg);
                  byteArray = new byte[ms.Length];
                  ms.Position = 0;
                  ms.Read(byteArray, 0, Convert.ToInt32(ms.Length));
  
                  ms.Close();
                  ms.Dispose();
                  bitMap.Dispose();
                  solidBrush.Dispose();
                  g.Dispose();
                  font.Dispose();
  
              }
              return byteArray;
          }
  

   

   

   

  Peter Kellner
  http://peterkellner.net
  Microsoft MVP • ASPInsider