SearchOption 枚举
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
指定是搜索当前目录，还是搜索当前目录及其所有子目录。
public enum class SearchOptionC#
public enum SearchOptionC#
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public enum SearchOptiontype SearchOption = [<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Serializable>]
type SearchOption = Public Enum SearchOption- 继承
- 属性
| 名称 | 值 | 说明 |
|---|---|---|
| AllDirectories | 1 | 在搜索操作中包括当前目录和所有它的子目录。 此选项在搜索中包括重解析点，比如安装的驱动器和符号链接。 |
| TopDirectoryOnly | 0 | 仅在搜索操作中包括当前目录。 |
以下示例列出了以字母“c”开头的所有目录和文件，如“c：\”。 在此示例中， TopDirectoryOnly 用于指定仅应搜索顶级目录。
using namespace System;
using namespace System::IO;
ref class App
{
public:
static void Main()
{
// Specify the directory you want to manipulate.
String^ path = "c:\\";
String^ searchPattern = "c*";
DirectoryInfo^ di = gcnew DirectoryInfo(path);
array<DirectoryInfo^>^ directories =
di->GetDirectories(searchPattern, SearchOption::TopDirectoryOnly);
array<FileInfo^>^ files =
di->GetFiles(searchPattern, SearchOption::TopDirectoryOnly);
Console::WriteLine(
"Directories that begin with the letter \"c\" in {0}", path);
for each (DirectoryInfo^ dir in directories)
{
Console::WriteLine(
"{0,-25} {1,25}", dir->FullName, dir->LastWriteTime);
}
Console::WriteLine();
Console::WriteLine(
"Files that begin with the letter \"c\" in {0}", path);
for each (FileInfo^ file in files)
{
Console::WriteLine(
"{0,-25} {1,25}", file->Name, file->LastWriteTime);
}
} // Main()
}; // App()
int main()
{
App::Main();
}
C#
using System;
using System.IO;
class App
{
public static void Main()
{
// Specify the directory you want to manipulate.
string path = @"c:\";
string searchPattern = "c*";
DirectoryInfo di = new DirectoryInfo(path);
DirectoryInfo[] directories =
di.GetDirectories(searchPattern, SearchOption.TopDirectoryOnly);
FileInfo[] files =
di.GetFiles(searchPattern, SearchOption.TopDirectoryOnly);
Console.WriteLine(
"Directories that begin with the letter \"c\" in {0}", path);
foreach (DirectoryInfo dir in directories)
{
Console.WriteLine(
"{0,-25} {1,25}", dir.FullName, dir.LastWriteTime);
}
Console.WriteLine();
Console.WriteLine(
"Files that begin with the letter \"c\" in {0}", path);
foreach (FileInfo file in files)
{
Console.WriteLine(
"{0,-25} {1,25}", file.Name, file.LastWriteTime);
}
} // Main()
} // App()
Imports System.IO
Class App
Public Shared Sub Main()
' Specify the directory you want to manipulate.
Dim path As String = "c:\\"
Dim searchPattern As String = "c*"
Dim di As DirectoryInfo = New DirectoryInfo(path)
Dim directories() As DirectoryInfo = _
di.GetDirectories(searchPattern, SearchOption.TopDirectoryOnly)
Dim files() As FileInfo = _
di.GetFiles(searchPattern, SearchOption.TopDirectoryOnly)
Console.WriteLine( _
"Directories that begin with the letter 'c' in {0}", path)
Dim dir As DirectoryInfo
For Each dir In directories
Console.WriteLine( _
"{0,-25} {1,25}", dir.FullName, dir.LastWriteTime)
Next dir
Console.WriteLine()
Console.WriteLine( _
"Files that begin with the letter 'c' in {0}", path)
Dim file As FileInfo
For Each file In files
Console.WriteLine( _
"{0,-25} {1,25}", file.Name, file.LastWriteTime)
Next file
End Sub
End Class
如果在 AllDirectories 搜索中选择，并且目录结构包含创建循环的链接，则搜索操作将进入无限循环。
| 产品 | 版本 |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 1.3, 1.4, 1.6, 2.0, 2.1 |
| UWP | 10.0 |
