通过

Marshal.WriteIntPtr 方法

  • 参考

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

将一个处理器本机大小的整数值写入非托管内存。 在 32 位系统上写入 32 位整数，在 64 位系统上写入 64 位整数。 支持写入未对齐的内存位置。

重载

WriteIntPtr(IntPtr, IntPtr)

将一个处理器本机大小的整数值写入非托管内存。
WriteIntPtr(IntPtr, Int32, IntPtr)

按指定的偏移量将一个处理器本机大小的整数值写入非托管内存。
WriteIntPtr(Object, Int32, IntPtr)
已过时.

将一个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

将一个处理器本机大小的整数值写入非托管内存。

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

非托管内存中要写入的地址。

val
IntPtr

nativeint

要写入的值。

属性
SecurityCriticalAttribute

例外

AccessViolationException

ptr 不是识别的格式。

- 或 -

ptr 为 null。

- 或 -

ptr 无效。

示例

以下示例演示如何使用 ReadIntPtr 和 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 允许与非托管 C 样式 IntPtr 数组直接交互，从而消除了在设置其元素值之前使用 Marshal.Copy) 将整个非托管数组复制到单独托管数组 (的开销。

支持写入未对齐的内存位置。

另请参阅

适用于

WriteIntPtr(IntPtr, Int32, IntPtr)

Source:
Marshal.cs
Source:
Marshal.cs
Source:
Marshal.cs

按指定的偏移量将一个处理器本机大小的整数值写入非托管内存。

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

非托管内存中要写入的基址。

ofs
Int32

额外的字节偏移量，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) 可产生空或无效地址。

示例

以下示例演示如何使用 ReadIntPtr 和 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 允许与非托管 C 样式 IntPtr 数组直接交互，从而消除了在设置其元素值之前使用 Marshal.Copy) 将整个非托管数组复制到单独托管数组 (的开销。

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

注意

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

将一个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.")]
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)

参数

ptr
Object

非托管内存中目标对象的基址。

ofs
Int32

额外的字节偏移量，在写入前添加到 ptr 参数中。

val
IntPtr

nativeint

要写入的值。

属性
ObsoleteAttribute SecurityCriticalAttribute

例外

AccessViolationException

基址 (ptr) 加上偏移字节 (ofs) 可产生空或无效地址。

ArgumentException

ptr 是 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使用 Marshal.Copy) 复制到单独的托管数组 (整个非托管数组的开销。

支持写入未对齐的内存位置。

另请参阅

适用于