本文实例讲述了创建动态缩略图的方法。分享给大家供大家参考。具体分析如下：

提示：

1. 导入 System.IO

2. 创建 类C lass CreateThumbnails

or any class and place following function inside that class

You need one function to response call back to main function

Function ImageAbortDummyCallback() As Boolean

Return False

End Function

具体代码如下：

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Function CreateJPEGThumbnail(ByVal inSourceFile As String, ByVal inDestinationFile As String, ByVal ThumbWidth As Integer, ByVal ThumbHeight As Integer) As Boolean Dim imageFile As System.Drawing.Image Dim outputFstream As New FileStream(inSourceFile, FileMode.Open, FileAccess.Read) 'Exposes a System.IO.Stream around a file, supporting both synchronous and asynchronous read and write operations. Dim ImageAbortCallBack As System.Drawing.Image.GetThumbnailImageAbort 'This method returns true if it decides that the System.Drawing.Image.GetThumbnailImage method should prematurely stop execution; otherwise, it returns false. imageFile = System.Drawing.Image.FromStream(outputFstream) ImageAbortCallBack = New System.Drawing.Image.GetThumbnailImageAbort(AddressOf ImageAbortDummyCallback) imageFile = imageFile.GetThumbnailImage(ThumbWidth, ThumbHeight, ImageAbortCallBack, IntPtr.Zero) 'IntPtr = A platform-specific type that is used to represent a pointer or a handle. imageFile.Save(inDestinationFile, System.Drawing.Imaging.ImageFormat.Jpeg) outputFstream.Close() outputFstream = Nothing imageFile = Nothing End Function

希望本文所述对大家的程序设计有所帮助。

【ASP.NET创建动态缩略图的方法】相关文章：

★ ASP.NET中TimeSpan的用法

★ ASP.NET中为GridView添加删除提示框的方法

★ ASP.NET连接MySql数据库的2个方法及示例

★ ASP.NET中实现获取调用方法名

★ ASP.NET MVC3 实现全站重定向的简单方法

★ ASP.NET简单的文字水印功能

★ ASP.NET清空SQL日志的具体方法

★ ASP.NET 创建带事件的用户控件

★ ASP.NET DataTable去掉重复行的2种方法

★ ASP.NET 运行.bat文件的实现方法