Hi All,
I am becoming frustrated after spending too much on this simple issue, hope
you can help.
I have the following code to download images stored in a sharepoint document
library behind a windows authenticated site.
Protected Function downloadImage(ByVal imageUrl As String)
Dim filename As String = String.Empty
Try
Dim fileReader As New WebClient()
fileReader.Credentials = New Net.NetworkCredential(WsUserName,
WsPassword,wsDomain)
filename = imageUrl.Substring(imageUrl.LastIndexOf("/") + 1)
Return fileReader.DownloadData(imageUrl)
Catch ex As Exception
HttpContext.Current.Response.Write(ex.Message +"<BR>"+
ex.stacktrace+" <BR>" +filename)
Return Nothing
End Try
End Function
Used like this: <img
src='http://siteUrl.com/_layouts/imgResize.aspx?image=http://siteUrl.com/mem
bers/PublishingImages/bball.jpg&size=80'>
Error:
The remote server returned an error: (401) Unauthorized.
at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest&
request) at System.Net.WebClient.DownloadData(Uri address) at
imgResize.downloadImage(String imageUrl)
bball.jpg
Buffer cannot be null. Parameter name: buffer
The creditials are public variables and are 100% correct. I have other web
apps on this server using the same code (_layouts folder) and works without
a problem. The impersonating user is a site collection admin. If I go to the
image url I am asked to authenticate as expected, if I pass in the
credentials I am using in the code then the image displayed.
I thought maybe it was an iis config issue but I have compared web.configs
with another working site that implements this code also but it didn't seem
to be missing anything.
Can anybody shed some light on this.
Regards,
Trent Allday
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