Marshal.WriteIntPtr 方法

定义

命名空间:: System.Runtime.InteropServices

程序集:: mscorlib.dll, System.Runtime.InteropServices.dll

程序集:: netstandard.dll, System.Runtime.InteropServices.dll

程序集:: System.Runtime.InteropServices.dll

程序集:: mscorlib.dll

程序集:: netstandard.dll

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。

将处理器本机大小的整数值写入非托管内存。 32 位整数在 32 位系统上写入，64 位整数在 64 位系统上写入。支持写入未对齐的内存位置。

重载

名称	说明
WriteIntPtr(IntPtr, IntPtr)	将处理器本机大小的整数值写入非托管内存中。
WriteIntPtr(IntPtr, Int32, IntPtr)	将处理器本机大小的整数值写入指定偏移量的非托管内存。
WriteIntPtr(Object, Int32, IntPtr)	已过时. 将处理器本机大小的整数值写入非托管内存。

WriteIntPtr(IntPtr, IntPtr)

Source:: Marshal.cs

Source:: Marshal.cs

Source:: Marshal.cs

Source:: Marshal.cs

Source:: Marshal.cs

将处理器本机大小的整数值写入非托管内存中。

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)

参数

ptr: IntPtr
nativeint

要写入的非托管内存中的地址。

val: IntPtr
nativeint

要写入的值。

属性: SecurityCriticalAttribute

例外

AccessViolationException

ptr 不是可识别的格式。

-或-

ptr 是 null。

-或-

ptr 无效。

示例

以下示例演示如何使用 ReadIntPtr and WriteIntPtr 方法读取和写入非托管数组。

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

注解

WriteIntPtr 启用与非托管 C 样式 IntPtr 数组的直接交互，无需在设置其元素值之前将整个非托管数组（using Marshal.Copy）复制到单独的托管数组。

支持写入未对齐的内存位置。

另请参阅

Copy(Int32[], Int32, IntPtr, Int32)

适用于

WriteIntPtr(IntPtr, Int32, IntPtr)

Source:: Marshal.cs

Source:: Marshal.cs

Source:: Marshal.cs

Source:: Marshal.cs

Source:: Marshal.cs

将处理器本机大小的整数值写入指定偏移量的非托管内存。

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)

参数

ptr: IntPtr
nativeint

要写入的非托管内存中的基址。

ofs: Int32

另一个字节偏移量，该偏移量在写入前添加到 ptr 参数中。

val: IntPtr
nativeint

要写入的值。

属性: SecurityCriticalAttribute

例外

AccessViolationException

基址（ptr）加上偏移字节（ofs）生成 null 或无效地址。

示例

以下示例演示如何使用 ReadIntPtr and WriteIntPtr 方法读取和写入非托管数组。

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

注解

此方法在 32 位系统上写入 32 位整数，在 64 位系统上写入 64 位整数。

WriteIntPtr 启用与非托管 C 样式 IntPtr 数组的直接交互，无需在设置其元素值之前将整个非托管数组（using Marshal.Copy）复制到单独的托管数组。

支持写入未对齐的内存位置。

另请参阅

适用于

WriteIntPtr(Object, Int32, IntPtr)

Source:: Marshal.cs

Source:: Marshal.cs

Source:: Marshal.cs

Source:: Marshal.cs

Source:: Marshal.cs

注意

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

将处理器本机大小的整数值写入非托管内存。

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.")]
[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Marshalling code for the object might not be available")]
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.")>]
[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Marshalling code for the object might not be available")>]
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)

参数

ptr: Object

目标对象的非托管内存中的基址。

ofs: Int32

另一个字节偏移量，该偏移量在写入前添加到 ptr 参数中。

val: IntPtr
nativeint

要写入的值。

属性: ObsoleteAttribute SecurityCriticalAttribute RequiresDynamicCodeAttribute

例外

AccessViolationException

基址（ptr）加上偏移字节（ofs）生成 null 或无效地址。

ArgumentException

ptr 是一个 ArrayWithOffset 对象。此方法不接受 ArrayWithOffset 参数。

注解

WriteIntPtr 启用与非托管 C 样式字节数组的直接交互，从而消除了在设置其元素值之前将整个非托管数组（using Marshal.Copy）复制到单独的托管数组的费用。

支持写入未对齐的内存位置。

另请参阅

Copy(Int32[], Int32, IntPtr, Int32)

适用于

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