image resize function producing 2 images of same size instead of thumb and large sizes
my code is meant 2 insert 2x images into the database. one medium size, and one thumbnail. unfortunately it seems to be inserting 2x images of the same size into the database. the images are retrieved using and event handler which works fine. i have isolated it to be my resize function:
1 using System; 2 using System.Data; 3 using System.Data.Sql; 4 using System.Data.SqlClient; 5 using System.Configuration; 6 using System.Collections; 7 using System.Web; 8 using System.Web.Security; 9 using System.Web.UI; 10 using System.Web.UI.WebControls; 11 using System.Web.UI.WebControls.WebParts; 12 using System.Web.UI.HtmlControls; 13 using System.Drawing; 14 using System.Drawing.Imaging; 15 using System.IO; 16 17 18 public partial class binary : System.Web.UI.Page 19 { 20 int maxImgWidth = 300; //Convert.ToInt32(System.Configuration.ConfigurationSettings.AppSettings["max_picture_height"]); 21 int maxImgHeight = 300; 22 int maxThumbWidth = 120; 23 int maxThumbHeight = 120; 24 25 protected void Page_Load(object sender, EventArgs e) 26 { 27 28 } 29 30 //on edit use content length and filename to make comparison to see if file should be updated 31 //or use viewstate to trap whether image "browse" button has been clicked 32 //limit lenght of the file name to 50 chars 33 protected void btnAdd_Click(object sender, EventArgs e) 34 { 35 if (upFile.HasFile) 36 { 37 if (CheckFileType(upFile.FileName)) 38 { 39 srcFiles.Insert(); 40 } 41 else 42 { 43 lblMessage.Text = "Invalid file type. Must be .jpg or .gif"; 44 } 45 } 46 } 47 48 #region Inserting Record 49 protected void srcFiles_Inserting(object sender, SqlDataSourceCommandEventArgs e) 50 { 51 HttpPostedFile file = (HttpPostedFile)(upFile.PostedFile); 52 53 //Medium Size Image 54 SqlParameter pImage = new SqlParameter(); 55 pImage.ParameterName = "@FileBytes"; 56 pImage.SqlDbType = SqlDbType.Image; 57 pImage.Value = ResizeImage(file,maxImgWidth, maxImgHeight); 58 e.Command.Parameters.Add(pImage); 59 60 //Thumbnail 61 SqlParameter pThumb = new SqlParameter(); 62 pThumb.ParameterName = "@ThumbBytes"; 63 pThumb.SqlDbType = SqlDbType.Image; 64 pThumb.Value = ResizeImage(file, maxThumbWidth, maxThumbHeight); 65 e.Command.Parameters.Add(pThumb); 66 67 SqlParameter pLength = new SqlParameter(); 68 pLength.ParameterName = "@FileLength"; 69 pLength.SqlDbType = SqlDbType.Int; 70 pLength.Value = file.ContentLength; 71 e.Command.Parameters.Add(pLength); 72 73 } 74 #endregion 75 76 #region Resize Image 77 private byte[] ResizeImage(HttpPostedFile file, int maxWidth, int maxHeight) 78 { 79 int fileSize = file.ContentLength; 80 byte[] myData = new byte[fileSize]; 81 file.InputStream.Read(myData, 0, fileSize); 82 83 System.Drawing.Image img = System.Drawing.Image.FromStream(file.InputStream); 84 85 int imgWidth = img.Width; 86 int imgHeight = img.Height; 87 double percent2Shrink = -1; 88 89 if (imgWidth >= imgHeight) 90 { 91 if (imgWidth > maxWidth) 92 percent2Shrink = (double)maxWidth / (double)imgWidth; 93 } 94 else 95 { 96 if (imgHeight > maxHeight) 97 percent2Shrink = (double)maxHeight / (double)imgHeight; 98 } 99 100 int newWidth = imgWidth; 101 int newHeight = imgHeight; 102 103 // Is resize required? 104 if (percent2Shrink != -1) 105 { 106 newWidth = (int)(imgWidth * percent2Shrink); 107 newHeight = (int)(imgHeight * percent2Shrink); 108 } 109 110 System.Drawing.Bitmap bmp = new Bitmap(newWidth, newHeight); 111 112 using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bmp)) 113 { 114 g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; 115 g.FillRectangle(Brushes.White, 0, 0, newWidth, newHeight); 116 g.DrawImage(img, 0, 0, newWidth, newHeight); 117 } 118 119 MemoryStream stream = new MemoryStream(); 120 bmp.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg); 121 122 img.Dispose(); 123 bmp.Dispose(); 124 125 byte[] imgBinaryData = stream.ToArray(); 126 127 return imgBinaryData; 128 } 129 #endregion 130 131 #region Check File Extension 132 private bool CheckFileType(string fileName) 133 { 134 if (Path.GetExtension(fileName).ToLower() == ".jpg") 135 { 136 return true; 137 } 138 else if (Path.GetExtension(fileName).ToLower() == ".gif") 139 return true; 140 else 141 return false; 142 } 143 #endregion 144 }any ideas?
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LeMerovingian
2/15/2007 5:50:42 AM
asp.net.drawinggdi
1803 articles. 
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