縮略圖生成期間的文件夾創建問題c＃

Question

我生成縮略圖，一切順利，但在創建子文件夾時出現問題。假設：

C：\用戶\ A \桌面\ B測試\冰島\ Haskolinn2 目標縮略圖文件夾將是這樣的： C：\用戶\ A \桌面\測試\冰島 * C：\用戶\ A \桌面\測試\ Haskolinn2 *

它必須看起來像 C：\用戶\ A \桌面\測試\冰島\ Haskolinn2

這裏是代碼：

public void CreateThumbnail(double wid, double hght, bool Isprint) 
    { 


     string saveAt = "C:\\Users\\a\\Desktop\\a test"; 

string b= "C:\\Users\\a\\Desktop\\b test\\iceland"   
string [] bb = Directory.GetDirectories(b, "*.*", SearchOption.AllDirectories); 

     foreach (string path in bb) 
     { 
      var directory = new DirectoryInfo(path); 

      string outputPath = Path.Combine(saveAt, directory.Name); 
      foreach (FileInfo f in directory.GetFiles("*.*", SearchOption.AllDirectories)) 
      { 



       if (f.DirectoryName != directory.FullName) 
       { 
        outputPath = Path.Combine(saveAt, directory.Name); 

       } 
       if (!Directory.Exists(outputPath)) 
       { 
        Directory.CreateDirectory(outputPath); 

       } 


       using (Image imagesize = Image.FromFile(f.FullName)) 

       using (Bitmap bitmapNew = new Bitmap(imagesize)) 
       { 
        double maxWidth = wid; 
        double maxHeight = hght; 
        int w = imagesize.Width; 

        int h = imagesize.Height; 
        // Longest and shortest dimension 
        int longestDimension = (w > h) ? w : h; 

        int shortestDimension = (w < h) ? w : h; 
        // propotionality 
        float factor = ((float)longestDimension)/shortestDimension; 

        // default width is greater than height  
        double newWidth = maxWidth; 
        double newHeight = maxWidth/factor; 

        // if height greater than width recalculate 
        if (w < h) 
        { 
         newWidth = maxHeight/factor; 

         newHeight = maxHeight; 
        } 

        string fileName = Path.Combine(outputPath, Path.GetFileNameWithoutExtension(f.Name) + ".jpeg"); 

        bitmapNew.GetThumbnailImage((int)newWidth, (int)newHeight,() => false, IntPtr.Zero) 

         .Save(fileName, System.Drawing.Imaging.ImageFormat.Jpeg); 



       } 

      } 
     } 
    } 


} 

Answer 1

從我所看到的，我猜Path.Combine呼叫沒有做什麼，你認爲它應該。

當給出兩個完全合格的路徑時，Path.Combine基本上忽略第一個，並返回第二個。例如：

string path1 = @"C:\Test\Path\" 
string path2 = @"C:\Other\Path\" 
Console.WriteLine(Path.Combine(path1, path2)); //prints C:\Other\Path 

在您的代碼中，這意味着您沒有使用縮略圖的目標文件夾，而是使用源文件夾。你可以嘗試剝離的完整路徑到一個文件夾的名稱，如

string path1 = @"C:\Test\Path\" 
string path2 = @"C:\Other\FolderToCombine\" 
DirectoryInfo di = new DirectoryInfo(path2); 

Console.WriteLine(Path.Combine(path1, di.Name)); //prints C:\Test\Path\FolderToCombine 

---

問題編輯後：
的問題是，對於像

...A 
    |-B 
    |-C 

您Directory.GetDirectories呼叫結構返回字符串，如「.. \ A」，「.. \ A \ B」「.. \ A \ C」。 當這些字符串在DirectoryInfo構造函數中使用時，您將得到名稱爲「A」，「B」和「C」的目錄，因此實際上，您正在線性化樹結構（如果B文件夾有一個子文件夾名爲A :)）

你可以這樣做：

public void CreateThumbnail(double wid, double hght, bool Isprint) 
{ 
    string saveAt = "C:\\Users\\a\\Desktop\\a test"; 
    string b= "C:\\Users\\a\\Desktop\\b test\\iceland" 
    ProcessFolder(b, saveAt, wid, hght, Isprint); 
} 

public static void ProcessFolder(string sourceFolder, string destFolder, double wid, double hght, bool Isprint) 
{ 
    //create the dest folder if it does not exist 
    Directory.CreateDirectory(destFolder); 

    //get info about the source folder 
    DirectoryInfo diSource = new DirectoryInfo(sourceFolder); 

    //get the source files (only in the current source folder) 
    foreach (FileInfo f in diSource.GetFiles("*.*")) 
    { 
    //calculate the destination file name 
    string destFileName = Path.Combine(destFolder, f.Name); 
    //thumbnail processing here 

    //quick test 
    File.Copy(f.FullName, destFileName); 
    } 

    //get all subfolders for the current folder 
    foreach (string dir in Directory.GetDirectories(sourceFolder, "*.*")) 
    { 
    //calculate the new output folder for a given subfolder 
    // if the source folder is \src\a\, and the dest folder is \dest\ 
    // this results in \dest\a 
    DirectoryInfo diSubfolder = new DirectoryInfo(dir); 
    string outputPath = Path.Combine(destFolder, diSubfolder.Name); 

    ProcessFolder(dir, outputPath, wid, hght, Isprint); //call recursively 
    } 
} 

這個例子將一個文件夾複製到另一個位置，只需更換File.Copy通話用你的邏輯。