asp.net生成缩略图
发表于:2007-06-30来源:作者:点击数:
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当我们要上传图片的时候,往往需要生成缩略图,以往我们要使用第三方控件才能完成。在ASP .net 中用下面方法轻松搞定 script language=" VB " runat="server"> Sub Page_Load(sender As Object, e As EventArgs) Dim image,aNewImage As System.Drawing.Imag
当我们要上传图片的时候,往往需要生成缩略图,以往我们要使用第三方控件才能完成。在ASP
.net中用下面方法轻松搞定
<script language="
VB" runat="server">
Sub Page_Load(sender As Object, e As EventArgs)
Dim image,aNewImage As System.Drawing.Image
dim width,height,newwidth,newheight as integer
Dim callb As System.Drawing.Image.GetThumbnailImageAbort
'生成缩略图
image=System.Drawing.Image.FromFile(Server.MapPath("classpic/"+"rs1.jpg"))
width=image.Width
height=image.height
if width>height then
newwidth=110
newheight=image.height/image.Width*newwidth
else
newheight=110
newwidth=image.Width/image.height*newheight
end if
aNewImage=image.GetThumbnailImage(newwidth,newheight,callb,new System.IntPtr())
aNewImage.Save(Server.MapPath("smallpic/"+"rs1.gif"))
image.Dispose()
End Sub
</script>
原文转自:http://www.ltesting.net