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showimage.aspx
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showimage.aspx
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<%@ Page Language="VB" %>
<%@Import Namespace="System.Drawing.Imaging" %>
<script runat="server">
Function ThumbnailCallback() As Boolean
Return False
End Function
Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
'Read in the image filename to create a thumbnail of
Dim imageUrl As String = Request.QueryString("img")
If imageUrl.Length > 0 Then
'Read in the width and height
'Dim setHeight As Integer = Request.QueryString("h")
Dim setWidth As Integer = Request.QueryString("w")
'Make sure that the image URL doesn't contain any /'s or \'s
'If imageUrl.IndexOf("/") >= 0 Or imageUrl.IndexOf("\") >= 0 Then
'We found a / or \
'Response.End()
'End If
'Add on the appropriate directory
imageUrl = Session("filepath") & "images\logos\" & imageUrl
Dim fullSizeImg As System.Drawing.Image
fullSizeImg = System.Drawing.Image.FromFile(imageUrl)
Dim origHeight = fullSizeImg.Height
Dim origWidth = fullSizeImg.Width
Dim setHeight = origHeight * setWidth / origWidth
If setHeight > 200 Then
setHeight = 200
setWidth = origWidth * setHeight / origHeight
End If
' set image format type
Dim imgFormat As ImageFormat = ImageFormat.Jpeg
Response.ContentType = "image/jpg"
' check if image is gif
If imageUrl.Split(".")(1) = "gif" Then
Response.ContentType = "image/gif"
imgFormat = ImageFormat.Gif
End If
'Do we need to create a thumbnail?
If setWidth > 0 And origWidth > setWidth Then
Dim dummyCallBack As System.Drawing.Image.GetThumbnailImageAbort
dummyCallBack = New System.Drawing.Image.GetThumbnailImageAbort(AddressOf ThumbnailCallback)
Dim thumbNailImg As System.Drawing.Image
thumbNailImg = fullSizeImg.GetThumbnailImage(setWidth, setHeight, dummyCallBack, IntPtr.Zero)
thumbNailImg.Save(Response.OutputStream, imgFormat)
'Clean up / Dispose...
thumbNailImg.Dispose()
Else
fullSizeImg.Save(Response.OutputStream, imgFormat)
End If
'Clean up / Dispose...
fullSizeImg.Dispose()
End If
End Sub
</script>