Count images in Folder using ASP.net

I want to count the number of images a folder开发者_如何学运维 folder, but it produces this error :

Could not find a part of the path 'c:\Content\slideshow\images\image\'.

All of the images are in a folder in the project. Located a Content/slideshow/images/image

This is my code:

<%
  string dir = @"/Content/slideshow/images/image";
  string[] files;
  int numFiles;
  files = System.IO.Directory.GetFiles(dir);
  numFiles = files.Length;
  Response.Write("num ber of images :" + numFiles);
%>

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"Could not find a part of the path 'c:\Content\slideshow\images\image\'"

Means very simply that the folder does not exist. If you want to user a relative path you can do the following.

Server.MapPath("~/{RelativePathHere})

Edit : In response to your comment. You will need to loop through the file and check for file extension of each (Keeping your own count)

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Use HttpContext.Current.Server.MapPath to map the virtual path to physical path and then pass it to Directory.GetFiles method

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To call Directory.GetFiles() you need to pass the full path to the images directory.

string dirPath = @"~/Content/slideshow/images/image";
string dirFullPath = Server.MapPath(dirPath);
string[] files;
int numFiles;
files = System.IO.Directory.GetFiles(dirFullPath);
numFiles = files.Length;
Response.Write("number of images: " + numFiles);

Server.MapPath returns the entire physical file path associated to the dirPath virtual path.

---

You need to pass this as a relative path using Server.MapPath Then I would suggest using DirectoryInfo.GetFiles instead of Directory.GetFiles and filter on the image types that you want, so you don't count non-image files. This will yield a FileInfo[].

<%
  string dir = Server.MapPath(@"/Content/slideshow/images/image");
  FileInfo[] files;
  int numFiles;
  files = (new System.IO.DirectoryInfo(dir)).GetFiles("filePattern");
  numFiles = files.Length;
  Response.Write("num ber of images :" + numFiles);
%>

If you have multiple file types that you want to count the best way to do this is just to remove the pattern then filter the results.

  var extensions = new String[] {"jpg", "png", "gif"};
  files = (new System.IO.DirectInfo(dir)).GetFiles();

  foreach(var extension in extensions)
  {
    numFiles += files.AsEnumerable.Where(f => f.Extension.Equals(extension));
  }

---

    int numberOfFiles ;
    string path = "C:/PIC";
    numberOfFiles = System.IO.Directory.GetFiles(path).Length;

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