十年网站开发经验 + 多家企业客户 + 靠谱的建站团队
量身定制 + 运营维护+专业推广+无忧售后,网站问题一站解决
本篇文章为大家展示了ASP.NET中怎么创建动态缩略图,内容简明扼要并且容易理解,绝对能使你眼前一亮,通过这篇文章的详细介绍希望你能有所收获。
专注于为中小企业提供成都做网站、网站设计、外贸营销网站建设服务,电脑端+手机端+微信端的三站合一,更高效的管理,为中小企业雅安免费做网站提供优质的服务。我们立足成都,凝聚了一批互联网行业人才,有力地推动了近千家企业的稳健成长,帮助中小企业通过网站建设实现规模扩充和转变。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
上述内容就是ASP.NET中怎么创建动态缩略图,你们学到知识或技能了吗?如果还想学到更多技能或者丰富自己的知识储备,欢迎关注创新互联行业资讯频道。