共用方式為


Marshal.WriteIntPtr 方法

定義

將處理器原生大小的整數值寫入 Unmanaged 記憶體。 在 32 位元系統上會寫入 32 位元整數,而在 64 位元系統上則會寫入 64 位元整數。 支援寫入未配置的記憶體位置。

多載

WriteIntPtr(IntPtr, IntPtr)

將處理器原來大小的整數值寫入 Unmanaged 記憶體。

WriteIntPtr(IntPtr, Int32, IntPtr)

將處理器原生大小的整數值寫入 Unmanaged 記憶體中的指定位移。

WriteIntPtr(Object, Int32, IntPtr)
已淘汰.

將處理器原來大小的整數值寫入 Unmanaged 記憶體。

WriteIntPtr(IntPtr, IntPtr)

來源:
Marshal.cs
來源:
Marshal.cs
來源:
Marshal.cs

將處理器原來大小的整數值寫入 Unmanaged 記憶體。

public:
 static void WriteIntPtr(IntPtr ptr, IntPtr val);
[System.Security.SecurityCritical]
public static void WriteIntPtr (IntPtr ptr, IntPtr val);
public static void WriteIntPtr (IntPtr ptr, IntPtr val);
[<System.Security.SecurityCritical>]
static member WriteIntPtr : nativeint * nativeint -> unit
static member WriteIntPtr : nativeint * nativeint -> unit
Public Shared Sub WriteIntPtr (ptr As IntPtr, val As IntPtr)

參數

ptr
IntPtr

nativeint

Unmanaged 記憶體中要寫入的位址。

val
IntPtr

nativeint

要寫入的值。

屬性

例外狀況

ptr 不是可辨認的格式。

-或-

ptrnull

-或-

ptr 無效。

範例

下列範例示範如何使用 和 WriteIntPtr 方法來讀取和寫入 Unmanaged 陣列ReadIntPtr

static void ReadWriteIntPtr()
{
    // Allocate unmanaged memory. 
    int elementSize = Marshal.SizeOf(typeof(IntPtr));
    IntPtr unmanagedArray = Marshal.AllocHGlobal(10 * elementSize);

    // Set the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
    {
        Marshal.WriteIntPtr(unmanagedArray, i * elementSize, ((IntPtr)(i + 1)));
    }
    Console.WriteLine("Unmanaged memory written.");

    Console.WriteLine("Reading unmanaged memory:");
    // Print the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
    {
        Console.WriteLine(Marshal.ReadIntPtr(unmanagedArray, i * elementSize));
    }

    Marshal.FreeHGlobal(unmanagedArray);

    Console.WriteLine("Done. Press Enter to continue.");
    Console.ReadLine();
}
Sub ReadWriteIntPtr()
    ' Allocate unmanaged memory.
    Dim elementSize As Integer = Marshal.SizeOf(GetType(IntPtr))
    Dim unmanagedArray As IntPtr = Marshal.AllocHGlobal(10 * elementSize)

    ' Set the 10 elements of the C-style unmanagedArray
    For i As Integer = 0 To 9
        Marshal.WriteIntPtr(unmanagedArray, i * elementSize, CType(i + 1, IntPtr))
    Next i
    Console.WriteLine("Unmanaged memory written.")

    Console.WriteLine("Reading unmanaged memory:")
    ' Print the 10 elements of the C-style unmanagedArray
    For i As Integer = 0 To 9
        Console.WriteLine(Marshal.ReadIntPtr(unmanagedArray, i * elementSize))
    Next i

    Marshal.FreeHGlobal(unmanagedArray)

    Console.WriteLine("Done. Press Enter to continue.")
    Console.ReadLine()
End Sub

備註

WriteIntPtr 可讓您與 Unmanaged C 樣式 IntPtr 陣列直接互動,不需要先將整個 Unmanaged 陣組 (使用 Marshal.Copy) 複製到個別 Managed 陣列,再設定其元素值。

支援寫入未配置的記憶體位置。

另請參閱

適用於

WriteIntPtr(IntPtr, Int32, IntPtr)

來源:
Marshal.cs
來源:
Marshal.cs
來源:
Marshal.cs

將處理器原生大小的整數值寫入 Unmanaged 記憶體中的指定位移。

public:
 static void WriteIntPtr(IntPtr ptr, int ofs, IntPtr val);
[System.Security.SecurityCritical]
public static void WriteIntPtr (IntPtr ptr, int ofs, IntPtr val);
public static void WriteIntPtr (IntPtr ptr, int ofs, IntPtr val);
[<System.Security.SecurityCritical>]
static member WriteIntPtr : nativeint * int * nativeint -> unit
static member WriteIntPtr : nativeint * int * nativeint -> unit
Public Shared Sub WriteIntPtr (ptr As IntPtr, ofs As Integer, val As IntPtr)

參數

ptr
IntPtr

nativeint

Unmanaged 記憶體中要寫入的基底位址。

ofs
Int32

額外的位元組位移,會先加入至參數 ptr,然後再進行寫入。

val
IntPtr

nativeint

要寫入的值。

屬性

例外狀況

基底位址 (ptr) 加上位移位元組 (ofs) 會產生 Null 或無效的位址。

範例

下列範例示範如何使用 和 WriteIntPtr 方法來讀取和寫入 Unmanaged 陣列ReadIntPtr

static void ReadWriteIntPtr()
{
    // Allocate unmanaged memory. 
    int elementSize = Marshal.SizeOf(typeof(IntPtr));
    IntPtr unmanagedArray = Marshal.AllocHGlobal(10 * elementSize);

    // Set the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
    {
        Marshal.WriteIntPtr(unmanagedArray, i * elementSize, ((IntPtr)(i + 1)));
    }
    Console.WriteLine("Unmanaged memory written.");

    Console.WriteLine("Reading unmanaged memory:");
    // Print the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
    {
        Console.WriteLine(Marshal.ReadIntPtr(unmanagedArray, i * elementSize));
    }

    Marshal.FreeHGlobal(unmanagedArray);

    Console.WriteLine("Done. Press Enter to continue.");
    Console.ReadLine();
}
Sub ReadWriteIntPtr()
    ' Allocate unmanaged memory.
    Dim elementSize As Integer = Marshal.SizeOf(GetType(IntPtr))
    Dim unmanagedArray As IntPtr = Marshal.AllocHGlobal(10 * elementSize)

    ' Set the 10 elements of the C-style unmanagedArray
    For i As Integer = 0 To 9
        Marshal.WriteIntPtr(unmanagedArray, i * elementSize, CType(i + 1, IntPtr))
    Next i
    Console.WriteLine("Unmanaged memory written.")

    Console.WriteLine("Reading unmanaged memory:")
    ' Print the 10 elements of the C-style unmanagedArray
    For i As Integer = 0 To 9
        Console.WriteLine(Marshal.ReadIntPtr(unmanagedArray, i * elementSize))
    Next i

    Marshal.FreeHGlobal(unmanagedArray)

    Console.WriteLine("Done. Press Enter to continue.")
    Console.ReadLine()
End Sub

備註

這個方法會在32位系統上寫入32位整數,並在64位系統上寫入64位整數。

WriteIntPtr 可讓您與 Unmanaged C 樣式 IntPtr 陣列直接互動,不需要先將整個 Unmanaged 陣組 (使用 Marshal.Copy) 複製到個別 Managed 陣列,再設定其元素值。

支援寫入未配置的記憶體位置。

另請參閱

適用於

WriteIntPtr(Object, Int32, IntPtr)

來源:
Marshal.cs
來源:
Marshal.cs
來源:
Marshal.cs

警告

WriteIntPtr(Object, Int32, IntPtr) may be unavailable in future releases.

將處理器原來大小的整數值寫入 Unmanaged 記憶體。

public:
 static void WriteIntPtr(System::Object ^ ptr, int ofs, IntPtr val);
[System.Obsolete("WriteIntPtr(Object, Int32, IntPtr) may be unavailable in future releases.")]
[System.Security.SecurityCritical]
public static void WriteIntPtr (object ptr, int ofs, IntPtr val);
[System.Obsolete("WriteIntPtr(Object, Int32, IntPtr) may be unavailable in future releases.")]
public static void WriteIntPtr (object ptr, int ofs, IntPtr val);
public static void WriteIntPtr (object ptr, int ofs, IntPtr val);
[System.Security.SecurityCritical]
public static void WriteIntPtr (object ptr, int ofs, IntPtr val);
[<System.Obsolete("WriteIntPtr(Object, Int32, IntPtr) may be unavailable in future releases.")>]
[<System.Security.SecurityCritical>]
static member WriteIntPtr : obj * int * nativeint -> unit
[<System.Obsolete("WriteIntPtr(Object, Int32, IntPtr) may be unavailable in future releases.")>]
static member WriteIntPtr : obj * int * nativeint -> unit
static member WriteIntPtr : obj * int * nativeint -> unit
[<System.Security.SecurityCritical>]
static member WriteIntPtr : obj * int * nativeint -> unit
Public Shared Sub WriteIntPtr (ptr As Object, ofs As Integer, val As IntPtr)

參數

ptr
Object

目標物件之 Unmanaged 記憶體中的基底位址。

ofs
Int32

額外的位元組位移,會先加入至參數 ptr,然後再進行寫入。

val
IntPtr

nativeint

要寫入的值。

屬性

例外狀況

基底位址 (ptr) 加上位移位元組 (ofs) 會產生 Null 或無效的位址。

ptrArrayWithOffset 物件。 這個方法不會接受 ArrayWithOffset 參數。

備註

WriteIntPtr 可讓您直接與 Unmanaged C 樣式的位元組陣列互動,避免使用 Marshal.Copy) 將整個 Unmanaged 陣列複製到個別 Managed 陣列,再設定其元素值之前,先將整個 Unmanaged 陣列複製到 (。

支援寫入未配置的記憶體位置。

另請參閱

適用於