将图像保存到IIS localhost中的文件夹

Question

I have to save images to a folder located in "c:\\inetpub\\wwwroot\\" and named as "UploadedImages". Here is my code:

         public string SaveImage(string base64,int compno)
{
    string res = "";
    try
    {

        using (MemoryStream ms = new MemoryStream(Convert.FromBase64String(base64)))
        {
            using (Bitmap bm2 = new Bitmap(ms))
            {
                bm2.Save(Server.MapPath("~/UploadedImages/ID"+compno+".jpg"));
            }
        }
        res = "done";
    }
    catch (Exception ex) {
        res = ex.ToString();
    }
    return res;
}

but it throws "A generic error occured in GDI+ at System.Drawing.Image.Save" exception. What am I doing wrong? This code works fine when saving image locally as

       bm2.Save("D:Embasy\UploadedImages\ID"+compno+".jpg"));

What changes do I need to make to save images in localhost directory?

Answer 1

Your not going to believe this -- the site running v1.1 had a virtual directory set-up which was mapped to the directory in which the image was saved to -- things worked fine.

The v2.0 site also had the same virtual directory name, but the physical path was different -- I changed the path to point to the same directory as the v1.0 site and now the code works.

So in short -- you were right about the "path must exist".

Classes within the System.Drawing namespace are not supported for use within a Windows or ASP.NET service. Attempting to use these classes from within one of these application types may produce unexpected problems, such as diminished service performance and run-time exceptions. For a supported alternative, see Windows Imaging Components.

and kindly refer this link

http://msdn.microsoft.com/en-us/library/xs6ftd89.aspx

Answer 2

When you are using Server.Mappath

bm2.Save(Server.MapPath("~/UploadedImages/ID"+compno+".jpg"));

"~(tield)" : is point to project/application root folder c:\\inetpub\\wwwroot\\yourproject

then find remaining your path /UploadedImages and then create ID1.jpg.

But your imagefolder "UploadImages" is exist in d: not in c:\\inetpub\\wwwroot\\yourproject

if you want to exist your image folder in D: then you should to create virtual directory and then you need to apply path as relevant

Answer 3

My problem actually was that every time i published website, I replaced the "UploadedImages" folder too and thus permissions were changed. So, i didnt replaced the folder again after changing its permissions and creating "everyone" group and giving full rights to it. Now code is working perfectly :)