SearchOption 列舉
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
指定要搜尋目前目錄，還是要搜尋目前目錄和所有子目錄。
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- 繼承
- 屬性
| 名稱 | 值 | Description |
|---|---|---|
| AllDirectories | 1 | 在搜尋作業中包含目前目錄和所有其子目錄。 這個選項會在搜尋中包含重新剖析點 (例如掛接磁碟和符號連結)。 |
| TopDirectoryOnly | 0 | 只在搜尋作業中包含目前目錄。 |
下列範例會列出以字母 「c」 開頭的所有目錄和檔案，如 「c：\」。。 在此範例中， TopDirectoryOnly 會用來指定只應該搜尋最上層目錄。
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
如果您在 AllDirectories 搜尋中選擇 ，且目錄結構包含建立循環的連結，則搜尋作業會進入無限迴圈。
| 產品 | 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 |
