Question

代码

public ActionResult DeleteProduct(int id)
{
     var FindImageFromDb = DB.ImageGalleries.Where(x => x.ProductIdFk == id).ToList();
     DirectoryInfo di = new DirectoryInfo(@"Path");
     string[] Filenames = FindImageFromDb.Select(x => x.ImageName.ToString()).ToArray();
     foreach (FileInfo Files in di.GetFiles(Filenames))
     {
         Files.Delete();
     }  
}

在编译时出错。在Foreach循环中将参数传递给GetFiles（）时出错，因为我正在传递字符串数组，但它仅接受一行表示单个项目。所以我如何以其他方式删除特定文件删除该文件，谢谢

Answer 1

将文件名检查移至循环内：

var fileNames = FindImageFromDb.Select(x => x.ImageName.ToString()).ToArray();
foreach (var file in di.GetFiles())
{
    if (fileNames.Any(f => f == file.Name))
    {
        file.Delete();
    }
}

Answer 2

只需遍历文件名并在循环内检索FileInfo：

 foreach (string filename in filenames)
 {
     FileInfo[] fi = di.GetFiles(filename);
     if (fi != null && fi.Length > 0)
     {
         // Consider if you'd like to check that only one file was found
         // This might happen because GetFiles considers its input as a pattern
         // However if you are using full file names (which is most likely the case), that shouldn't be necessary
         fi[0].Delete();
     }
 }

Answer 3

使用Lambda-

var files = di.GetFiles().Where(x => Filenames.Any(y => y == x.Name));

从目录C＃Asp.net MVC删除文件

4 个答案: