PathTooLongException 類別

定義

路徑名稱或完整檔案名稱超過系統定義的最大長度時所擲回的例外狀況。The exception that is thrown when a path or fully qualified file name is longer than the system-defined maximum length.

public ref class PathTooLongException : System::IO::IOException
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public class PathTooLongException : System.IO.IOException
type PathTooLongException = class
    inherit IOException
Public Class PathTooLongException
Inherits IOException
繼承
屬性

備註

如果您的程式碼FileIOPermissionAttribute.PathDiscovery沒有許可權, 此例外狀況的錯誤訊息可能只會包含檔案或目錄名稱, 而不是完整路徑。If your code does not have FileIOPermissionAttribute.PathDiscovery permission, the error message for this exception may contain only file or directory names instead of full paths.

在使用之前.NET Framework 4.6.2.NET Framework 4.6.2的 .NET Framework 版本執行的應用程式中, 完整路徑不得超過260個字元, 以維持與 Windows 作業系統的相容性。In apps that run under versions of the .NET Framework prior to the .NET Framework 4.6.2.NET Framework 4.6.2, full paths must not exceed 260 characters to maintain compatibility with Windows operating systems. 任何超過260個字元的路徑會自動PathTooLongException擲回。Any path in excess of 260 characters automatically throws a PathTooLongException. 如需這項限制的詳細資訊, 請參閱 BCL 小組 blog 中的進入.net 的長路徑For more information about this restriction, see the entry Long Paths in .NET in the BCL Team blog.

注意

此例外狀況不會包含在適用于 Windows Store 應用程式的 .net中, 或可移植的類別庫中, 但會由的某些成員擲回。This exception is not included in .NET for Windows Store apps or the Portable Class Library, but it is thrown by some members that are. 若要在這種情況下攔截例外狀況catch , 請撰寫會IOException改為處理的語句。To catch the exception in that case, write a catch statement that handles an IOException instead.

從以執行的.NET Framework 4.6.2.NET Framework 4.6.2應用程式開始, .NET Framework 支援超過 260 (或MAX_PATH) 個字元的長路徑。Starting with apps running under the .NET Framework 4.6.2.NET Framework 4.6.2, the .NET Framework supports long paths in excess of 260 (or MAX_PATH) characters. 擲回PathTooLongException例外狀況的條件取決於應用程式的目標 .NET Framework 版本:The conditions under which a PathTooLongException exception are thrown depend on the version of the .NET Framework that an app targets:

以和更新版本.NET Framework 4.6.2.NET Framework 4.6.2為目標的應用程式Apps that target the .NET Framework 4.6.2.NET Framework 4.6.2 and later versions
預設支援長路徑。Long paths are supported by default. 在下列情況PathTooLongException下, 執行時間會擲回:The runtime throws a PathTooLongException under the following conditions:

  • 作業系統傳回 COR_E_PATHTOOLONG 或其對應項。The operating system returns COR_E_PATHTOOLONG or its equivalent.

  • 路徑長度超過Int16.MaxValue (32767) 個字元。The length of the path exceeds Int16.MaxValue (32,767) characters.

以和更早.NET Framework 4.6.1.NET Framework 4.6.1版本為目標的應用程式Apps that target the .NET Framework 4.6.1.NET Framework 4.6.1 and earlier versions
預設會停用長路徑, 而且會維護舊版的行為。Long paths are disabled by default, and the legacy behavior is maintained. PathTooLongException每當路徑超過260個字元時, 執行時間就會擲回。The runtime throws a PathTooLongException whenever a path exceeds 260 characters.

如果不想要的話, 以.NET Framework 4.6.1.NET Framework 4.6.1和較早版本為目標但.NET Framework 4.6.2.NET Framework 4.6.2在下執行的應用程式, 可以藉由在應用程式佈建檔的 <執行時間 >元素中包含下列設定, 以啟用長路徑支援:If this is undesirable, apps that target the .NET Framework 4.6.1.NET Framework 4.6.1 and earlier but run under the .NET Framework 4.6.2.NET Framework 4.6.2 can enable long path support by including the following setting in the <runtime> element of the application configuration file:

  
<runtime>   
   <AppContextSwitchOverrides value="Switch.System.IO.UseLegacyPathHandling=false" />   
</runtime>  
  

PathTooLongException會使用 HRESULT COR_E_PATHTOOLONG, 其值為0x800700CE。PathTooLongException uses the HRESULT COR_E_PATHTOOLONG, which has the value 0x800700CE.

建構函式

PathTooLongException()

使用其 HRESULT 設定為 COR_E_PATHTOOLONG,初始化 PathTooLongException 類別的新執行個體。Initializes a new instance of the PathTooLongException class with its HRESULT set to COR_E_PATHTOOLONG.

PathTooLongException(SerializationInfo, StreamingContext)

使用指定的序列化 (Serialization) 和內容資訊,初始化 PathTooLongException 類別的新執行個體。Initializes a new instance of the PathTooLongException class with the specified serialization and context information.

PathTooLongException(String)

使用其訊息字串設定為 message 和其 HRESULT 設定為 COR_E_PATHTOOLONG,初始化 PathTooLongException 類別的新執行個體。Initializes a new instance of the PathTooLongException class with its message string set to message and its HRESULT set to COR_E_PATHTOOLONG.

PathTooLongException(String, Exception)

使用指定的錯誤訊息以及造成此例外狀況的內部例外狀況的參考,初始化 PathTooLongException 類別的新執行個體。Initializes a new instance of the PathTooLongException class with a specified error message and a reference to the inner exception that is the cause of this exception.

屬性

Data

取得提供例外狀況之其他使用者定義相關資訊的索引鍵/值組集合。Gets a collection of key/value pairs that provide additional user-defined information about the exception.

(繼承來源 Exception)
HelpLink

取得或設定與這個例外狀況相關聯的說明檔連結。Gets or sets a link to the help file associated with this exception.

(繼承來源 Exception)
HResult

取得或設定 HRESULT,它是指派給特定例外狀況的編碼數值。Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception.

(繼承來源 Exception)
InnerException

取得造成目前例外狀況的 Exception 執行個體。Gets the Exception instance that caused the current exception.

(繼承來源 Exception)
Message

取得描述目前例外狀況的訊息。Gets a message that describes the current exception.

(繼承來源 Exception)
Source

取得或設定造成錯誤的應用程式或物件的名稱。Gets or sets the name of the application or the object that causes the error.

(繼承來源 Exception)
StackTrace

取得呼叫堆疊上即時運算框架的字串表示。Gets a string representation of the immediate frames on the call stack.

(繼承來源 Exception)
TargetSite

取得擲回目前例外狀況的方法。Gets the method that throws the current exception.

(繼承來源 Exception)

方法

Equals(Object)

判斷指定的物件是否等於目前的物件。Determines whether the specified object is equal to the current object.

(繼承來源 Object)
GetBaseException()

在衍生類別中覆寫時,傳回一或多個後續的例外狀況的根本原因 ExceptionWhen overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions.

(繼承來源 Exception)
GetHashCode()

作為預設雜湊函數。Serves as the default hash function.

(繼承來源 Object)
GetObjectData(SerializationInfo, StreamingContext)

在衍生類別中覆寫時,使用例外狀況的資訊設定 SerializationInfoWhen overridden in a derived class, sets the SerializationInfo with information about the exception.

(繼承來源 Exception)
GetType()

取得目前執行個體的執行階段類型。Gets the runtime type of the current instance.

(繼承來源 Exception)
MemberwiseClone()

建立目前 Object 的淺層複製。Creates a shallow copy of the current Object.

(繼承來源 Object)
ToString()

建立並傳回目前例外狀況的字串表示。Creates and returns a string representation of the current exception.

(繼承來源 Exception)

事件

SerializeObjectState

當例外狀況序列化,以建立包含例外狀況相關序列化資料的例外狀況狀態物件時,就會發生此事件。Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception.

(繼承來源 Exception)

適用於

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