c#计算文件夹中的文件数
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Counting the number of files in a folder in c#
提问by user1920798
I am a newbie to programming and need help to create a windows application in C# to count the number of files in a folder.
我是编程新手，需要帮助来用 C# 创建 Windows 应用程序来计算文件夹中的文件数。
What method would I use to make it count?
我会用什么方法来计算？
**Update 02/01/2016
**更新 02/01/2016
Exactly what it says, the amunt of files contained inside the folder.
正是它所说的，文件夹中包含的文件数量。
e.g. If a folder contains 3 image files and 3 text files then the application should return the value 6.
例如，如果一个文件夹包含 3 个图像文件和 3 个文本文件，则应用程序应返回值 6。
回答by Hossein Narimani Rad
You can use the System.IO.DirectoryInfo;
您可以使用System.IO.DirectoryInfo;
DirectoryInfo info = new DirectoryInfo(your folder path);
info.GetFiles().Count();
Or as suggested:
或者按照建议：
info.EnumerateFiles();
回答by Yuck
Try this:
尝试这个：
var files = Directory.GetFiles(@"C:\SomeFolder").Length;
Be aware that if the directory doesn't exist this will throw an exception.
请注意，如果目录不存在，这将引发异常。
回答by Hikiko
The DirectoryInfoclass will help you.
该DirectoryInfo课程将帮助你。
var info = new DirectoryInfo("D:\");
var files = info.GetFiles();
var dirs = info.GetDirectories();
files.Length;
dirs.Length;
回答by Obama
// This searches in the current directory and also sub directories
int folderCount = Directory.GetFiles(path, "*.*", SearchOption.AllDirectories).Length;
// This searches only in the current directory
int folderCount = Directory.GetFiles(path, "*.*", SearchOption.TopDirectory).Length;
Good luck!
祝你好运！
回答by Pavel Vladov
You should use the Directory.GetFilesmethod.
您应该使用Directory.GetFiles方法。
int fileCount = Directory.GetFiles(@"C:\MyFolder").Length;
If you want to search the subdirectories, too, you can use the following code:
如果您也想搜索子目录，可以使用以下代码：
int fileCount = Directory.GetFiles(@"c:\MyDir\", "*.*", SearchOption.AllDirectories).Length;
Note that if the directory does not exist a DirectoryNotFoundExceptionwill be thrown, so if you are not sure whether the directory exists or not you can either use a try ... catch block or check if the directory exists using the Directory.Exists method:
请注意，如果目录不存在，将抛出DirectoryNotFoundException，因此如果您不确定目录是否存在，您可以使用 try ... catch 块或使用Directory.Exists 方法检查目录是否存在：
if (Directory.Exists(dirName))
{
// Your code here
}
