CODEWITHSUNDEEP
c#imageftp
Soheila Hg
Soheila Hg

Reputation: 578

"threw an exception" at the end of using in reading image from FTP

I have a list of Image's address. With this code I can read the Image correctly :

List<Image> ImageList = new List<Image>();
List<string> fileNameList = new List<string>();

foreach (var fileName in fileNameList)
            {
                var request = WebRequest.Create(fileName);
                request.Method = WebRequestMethods.Ftp.DownloadFile;

                request.Credentials = new NetworkCredential(Username, Password);
                using (var response = (FtpWebResponse)request.GetResponse())
                using (var stream = response.GetResponseStream())
                using (var img = Image.FromStream(stream))
                {
                    img.Save(@"D:\ax.jpg", ImageFormat.Jpeg);
                    ImageList.Add(img);
                }
            }

Until this line ImageList.Add(img); both of the img and the item in ImageList are true. But when it's coming out of the last using, all of the ImageList's properties changes to "threw an exception of type 'System.ArgumentException'"

For example for property of Height it changed to :

'((new System.Collections.Generic.Mscorlib_CollectionDebugView<System.Drawing.Image>(ImageList)).Items[0]).Height' threw an exception of type 'System.ArgumentException'

What's wrong with my code?

Upvotes: 0

Views: 170

Answers (1)

Damith
Damith

Reputation: 63095

don't use using statement for image, it will dispose image when leave the block 

using (var stream = response.GetResponseStream())
{
    var img = Image.FromStream(stream);
    img.Save(@"D:\ax.jpg", ImageFormat.Jpeg);
    ImageList.Add(img);
}

Upvotes: 1

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