C# Source Code: Creating a thumbnail image from an image file
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C# Source Code
Creating a thumbnail image from an image file
By:
Andrew Baker
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Date:
Tuesday, April 19, 2005
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1841
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Unspecified
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Below is an overloaded method (an example code) which shows how to create a thumbnail from an image. using System; using System.Drawing; #region Image Thumbnail /// <summary> /// Creates a thumb nail (of size 64 by 64). /// </summary> /// <param name="imageFileName">The path to the image file.</param> /// <returns>Returns the image thumbnail.</returns> /// <example> /// // Get thumb nail (change file name to suite) /// Image thumbnail = GetImageThumbNail(@"c:\test.bmp"); /// // Save thumb nail (change file name to suite) /// thumbnail.Save("C:\test_thumb.jpg"); /// </example> public static Image GetImageThumbNail(string imageFileName) { return GetImageThumbNail(imageFileName, new Size(64, 64) ); } /// <summary> /// Creates a thumb nail of the specified size. /// </summary> /// <param name="imageFileName">The path to the image file.</param> /// <param name="size">The desired size of the thumbnail.</param> /// <returns>Returns the image thumbnail.</returns> /// <example> /// // Get thumb nail (change file name to suite) /// Image thumbnail = GetImageThumbNail(@"c:\test.bmp"); /// // Save thumb nail (change file name to suite) /// thumbnail.Save("C:\test_thumb.jpg"); /// </example> public static Image GetImageThumbNail(string imageFileName, Size size) { // Load the image System.Drawing.Image image = System.Drawing.Image.FromFile(imageFileName); // Create the thumbnail image System.Drawing.Image thumbnailImage = image.GetThumbnailImage( size.Width, size.Height, new System.Drawing.Image.GetThumbnailImageAbort( ThumbnailCallback ), IntPtr.Zero); // Return the thumbnail return thumbnailImage; } /// <summary> /// Creates a thumb nail (of size 64 by 64). /// </summary> /// <param name="image">The image to return the thumb nail of.</param> /// <returns>Returns the image thumbnail.</returns> public static Image GetImageThumbNail(Image image) { return GetImageThumbNail(image, new Size(64, 64) ); } /// <summary> /// Creates a thumb nail of the specified size. /// </summary> /// <param name="image">The image to return the thumb nail of.</param> /// <param name="size">The desired size of the thumbnail.</param> /// <returns>Returns the image thumbnail.</returns> public static Image GetImageThumbNail(Image image, Size size) { // Create the thumbnail image System.Drawing.Image thumbnailImage = image.GetThumbnailImage( size.Width, size.Height, new System.Drawing.Image.GetThumbnailImageAbort( ThumbnailCallback ), IntPtr.Zero); // Return the thumbnail return thumbnailImage; } /// <summary> /// Required for <c>GetThumbnailImageAbort</c>. /// </summary> /// <returns>Returns false.</returns> private static bool ThumbnailCallback() { return false; } #endregion Image Thumbnail
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