本文实例讲述了ASP.NET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：
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asp.net程序设计有所帮助。
您可能感兴趣的文章:
- asp.net生成缩略图示例方法分享
- asp.net中生成缩略图并添加版权实例代码
- asp.net生成缩略图实现代码
- asp.net文件上传功能(单文件，多文件,自定义生成缩略图,水印)
- asp.net 生成缩略图代码
- asp.net 上传图片并同时生成缩略图的代码
- asp.net 点缩略图弹出随图片大小自动调整的页面
- ASP.Net 上传图片并生成高清晰缩略图
- asp.net生成高质量缩略图通用函数(c#代码),支持多种生成方式
- ASP.NET中高质量缩略图的生成代码
- asp.net图片上传生成缩略图的注意事项
- ASP.NET实现根据URL生成网页缩略图的方法
本文由 华域联盟 原创撰写：华域联盟 » ASP.NET创建动态缩略图的方法
转载请保留出处和原文链接：https://www.cnhackhy.com/57111.htm
