Marshal.Copy 方法

定义

命名空间:

System.Runtime.InteropServices

程序集:

System.Runtime.InteropServices.dll

将数据从托管数组复制到非托管内存指针，或从非托管内存指针复制到托管数组。

重载

Copy(Single[], Int32, IntPtr, Int32)	将数据从一维托管单精度浮点数数组复制到非托管内存指针。
Copy(IntPtr, Single[], Int32, Int32)	将数据从非托管内存指针复制到托管单精度浮点数数组。
Copy(IntPtr, IntPtr[], Int32, Int32)	将数据从非托管的内存指针复制到托管的 IntPtr 数组。
Copy(IntPtr, Int64[], Int32, Int32)	将数据从非托管内存指针复制到托管 64 位带符号整数数组。
Copy(IntPtr, Int32[], Int32, Int32)	将数据从非托管内存指针复制到托管 32 位带符号整数数组。
Copy(IntPtr, Int16[], Int32, Int32)	将数据从非托管内存指针复制到托管 16 位带符号整数数组。
Copy(IntPtr, Double[], Int32, Int32)	将数据从非托管内存指针复制到托管双精度浮点数数组。
Copy(IntPtr[], Int32, IntPtr, Int32)	将数据从一维托管的 IntPtr 数组复制到非托管内存指针。
Copy(IntPtr, Byte[], Int32, Int32)	将数据从非托管内存指针复制到托管 8 位无符号整数数组。
Copy(Int64[], Int32, IntPtr, Int32)	将数据从一维托管 64 位带符号整数数组复制到非托管内存指针。
Copy(Int32[], Int32, IntPtr, Int32)	将数据从一维托管 32 位带符号整数数组复制到非托管内存指针。
Copy(Int16[], Int32, IntPtr, Int32)	将数据从一维托管 16 位带符号整数数组复制到非托管内存指针。
Copy(Double[], Int32, IntPtr, Int32)	将数据从一维托管双精度浮点数数组复制到非托管内存指针。
Copy(Char[], Int32, IntPtr, Int32)	将数据从一维托管字符数组复制到非托管内存指针。
Copy(IntPtr, Char[], Int32, Int32)	将数据从非托管内存指针复制到托管字符数组。
Copy(Byte[], Int32, IntPtr, Int32)	将数据从一维托管 8 位无符号整数数组复制到非托管内存指针。

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

Source:

Marshal.cs

将数据从一维托管单精度浮点数数组复制到非托管内存指针。

public:
 static void Copy(cli::array <float> ^ source, int startIndex, IntPtr destination, int length);

public static void Copy (float[] source, int startIndex, IntPtr destination, int length);

static member Copy : single[] * int * nativeint * int -> unit

Public Shared Sub Copy (source As Single(), startIndex As Integer, destination As IntPtr, length As Integer)

参数

source

Single[]

从中进行复制的一维数组。

startIndex

Int32

源数组中从零开始的索引，在此处开始复制。

destination

IntPtr

nativeint

要复制到的内存指针。

length

Int32

要复制的数组元素的数目。

例外

ArgumentOutOfRangeException

startIndex 和 length 无效。

ArgumentNullException

source、startIndex、destination 或 length 为 null。

注解

可以使用此方法将一维托管数组的子集复制到非托管 C 样式数组。

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

Source:

Marshal.cs

将数据从非托管内存指针复制到托管单精度浮点数数组。

public:
 static void Copy(IntPtr source, cli::array <float> ^ destination, int startIndex, int length);

public static void Copy (IntPtr source, float[] destination, int startIndex, int length);

static member Copy : nativeint * single[] * int * int -> unit

Public Shared Sub Copy (source As IntPtr, destination As Single(), startIndex As Integer, length As Integer)

参数

source

IntPtr

nativeint

从中进行复制的内存指针。

destination

Single[]

要复制到的数组。

startIndex

Int32

目标数组中从零开始的索引，在此处开始复制。

length

Int32

要复制的数组元素的数目。

例外

ArgumentNullException

source、destination、startIndex 或 length 为 null。

注解

非托管的 C 样式数组不包含边界信息，这阻止 startIndex 验证 和 length 参数。 因此，与 参数对应的 source 非托管数据将填充托管数组，而不考虑其有用性。 在调用此方法之前，必须使用适当的大小初始化托管数组。

另请参阅

• Copy(Int32[], Int32, IntPtr, Int32)

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

Source:

Marshal.cs

将数据从非托管的内存指针复制到托管的 IntPtr 数组。

public:
 static void Copy(IntPtr source, cli::array <IntPtr> ^ destination, int startIndex, int length);

public static void Copy (IntPtr source, IntPtr[] destination, int startIndex, int length);

static member Copy : nativeint * nativeint[] * int * int -> unit

Public Shared Sub Copy (source As IntPtr, destination As IntPtr(), startIndex As Integer, length As Integer)

参数

source

IntPtr

nativeint

从中进行复制的内存指针。

destination

IntPtr[]

nativeint[]

要复制到的数组。

startIndex

Int32

目标数组中从零开始的索引，在此处开始复制。

length

Int32

要复制的数组元素的数目。

例外

ArgumentNullException

source、destination、startIndex 或 length 为 null。

注解

非托管的 C 样式数组不包含边界信息，这阻止 startIndex 验证 和 length 参数。 因此，与 参数对应的 source 非托管数据将填充托管数组，而不考虑其有用性。 在调用 Marshal.Copy 方法之前，必须使用适当的大小初始化托管数组。

Copy(IntPtr, Int64[], Int32, Int32)

Source:

Marshal.cs

将数据从非托管内存指针复制到托管 64 位带符号整数数组。

public:
 static void Copy(IntPtr source, cli::array <long> ^ destination, int startIndex, int length);

public static void Copy (IntPtr source, long[] destination, int startIndex, int length);

static member Copy : nativeint * int64[] * int * int -> unit

Public Shared Sub Copy (source As IntPtr, destination As Long(), startIndex As Integer, length As Integer)

参数

source

IntPtr

nativeint

从中进行复制的内存指针。

destination

Int64[]

要复制到的数组。

startIndex

Int32

目标数组中从零开始的索引，在此处开始复制。

length

Int32

要复制的数组元素的数目。

例外

ArgumentNullException

source、destination、startIndex 或 length 为 null。

示例

以下示例将数组复制到非托管内存，然后将非托管数组复制回托管内存。

using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        Int64[] managedArray = { 1, 2, 3, 4 };

        // Initialize unmanaged memory to hold the array.
        int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            Int64[] managedArray2 = new Int64[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

Imports System.Runtime.InteropServices



Module Example


    Sub Main()
        ' Create a managed array.
        Dim managedArray As Int64() = {1, 2, 3, 4}

        ' Initialize unmanaged memory to hold the array.
        Dim size As Integer = Marshal.SizeOf(managedArray(0)) * managedArray.Length

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.
            Dim managedArray2(managedArray.Length) As Int64

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)

            Console.WriteLine("The array was copied to unmanaged memory and back.")

        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)
        End Try

    End Sub
End Module

注解

非托管的 C 样式数组不包含边界信息，这阻止 startIndex 验证 和 length 参数。 因此，与 参数对应的source 非托管数据将填充托管数组，而不考虑其有用性。 在调用此方法之前，必须使用适当的大小初始化托管数组。

另请参阅

• Copy(Int32[], Int32, IntPtr, Int32)

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

Source:

Marshal.cs

将数据从非托管内存指针复制到托管 32 位带符号整数数组。

public:
 static void Copy(IntPtr source, cli::array <int> ^ destination, int startIndex, int length);

public static void Copy (IntPtr source, int[] destination, int startIndex, int length);

static member Copy : nativeint * int[] * int * int -> unit

Public Shared Sub Copy (source As IntPtr, destination As Integer(), startIndex As Integer, length As Integer)

参数

source

IntPtr

nativeint

从中进行复制的内存指针。

destination

Int32[]

要复制到的数组。

startIndex

Int32

目标数组中从零开始的索引，在此处开始复制。

length

Int32

要复制的数组元素的数目。

例外

ArgumentNullException

source、destination、startIndex 或 length 为 null。

示例

以下示例将数组复制到非托管内存，然后将非托管数组复制回托管内存。

using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        int[] managedArray = { 1, 2, 3, 4 };

        // Initialize unmanaged memory to hold the array.
        int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            int[] managedArray2 = new int[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

Imports System.Runtime.InteropServices



Module Example


    Sub Main()
        ' Create a managed array.
        Dim managedArray As Integer() = {1, 2, 3, 4}

        ' Initialize unmanaged memory to hold the array.
        Dim size As Integer = Marshal.SizeOf(managedArray(0)) * managedArray.Length

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.
            Dim managedArray2(managedArray.Length) As Integer

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)

            Console.WriteLine("The array was copied to unmanaged memory and back.")

        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)
        End Try

    End Sub
End Module

注解

非托管的 C 样式数组不包含边界信息，这阻止 startIndex 验证 和 length 参数。 因此，与 参数对应的 source 非托管数据将填充托管数组，而不考虑其有用性。 在调用此方法之前，必须使用适当的大小初始化托管数组。

另请参阅

• Copy(Int32[], Int32, IntPtr, Int32)

Copy(IntPtr, Int16[], Int32, Int32)

Source:

Marshal.cs

将数据从非托管内存指针复制到托管 16 位带符号整数数组。

public:
 static void Copy(IntPtr source, cli::array <short> ^ destination, int startIndex, int length);

public static void Copy (IntPtr source, short[] destination, int startIndex, int length);

static member Copy : nativeint * int16[] * int * int -> unit

Public Shared Sub Copy (source As IntPtr, destination As Short(), startIndex As Integer, length As Integer)

参数

source

IntPtr

nativeint

从中进行复制的内存指针。

destination

Int16[]

要复制到的数组。

startIndex

Int32

目标数组中从零开始的索引，在此处开始复制。

length

Int32

要复制的数组元素的数目。

例外

ArgumentNullException

source、destination、startIndex 或 length 为 null。

示例

以下示例将数组复制到非托管内存，然后将非托管数组复制回托管内存。

using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        short[] managedArray = { 1, 2, 3, 4 };

        // Initialize unmanaged memory to hold the array.
        int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            short[] managedArray2 = new short[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

Imports System.Runtime.InteropServices



Module Example


    Sub Main()
        ' Create a managed array.
        Dim managedArray As Short() = {1, 2, 3, 4}

        ' Initialize unmanaged memory to hold the array.
        Dim size As Integer = Marshal.SizeOf(managedArray(0)) * managedArray.Length

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.
            Dim managedArray2(managedArray.Length) As Short

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)

            Console.WriteLine("The array was copied to unmanaged memory and back.")

        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)
        End Try

    End Sub
End Module

注解

非托管的 C 样式数组不包含边界信息，这阻止 startIndex 验证 和 length 参数。 因此，与 参数对应的 source 非托管数据将填充托管数组，而不考虑其有用性。 在调用此方法之前，必须使用适当的大小初始化托管数组。

另请参阅

• Copy(Int32[], Int32, IntPtr, Int32)

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

Source:

Marshal.cs

将数据从非托管内存指针复制到托管双精度浮点数数组。

public:
 static void Copy(IntPtr source, cli::array <double> ^ destination, int startIndex, int length);

public static void Copy (IntPtr source, double[] destination, int startIndex, int length);

static member Copy : nativeint * double[] * int * int -> unit

Public Shared Sub Copy (source As IntPtr, destination As Double(), startIndex As Integer, length As Integer)

参数

source

IntPtr

nativeint

从中进行复制的内存指针。

destination

Double[]

要复制到的数组。

startIndex

Int32

目标数组中从零开始的索引，在此处开始复制。

length

Int32

要复制的数组元素的数目。

例外

ArgumentNullException

source、destination、startIndex 或 length 为 null。

示例

以下示例将数组复制到非托管内存，然后将非托管数组复制回托管内存。

using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        double[] managedArray = { 0.1, 0.2, 0.3, 0.4 };

        // Initialize unmanaged memory to hold the array.
        int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            double[] managedArray2 = new double[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

Imports System.Runtime.InteropServices



Module Example


    Sub Main()
        ' Create a managed array.
        Dim managedArray As Double() = {0.1, 0.2, 0.3, 0.4}

        ' Initialize unmanaged memory to hold the array.
        Dim size As Integer = Marshal.SizeOf(managedArray(0)) * managedArray.Length

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.
            Dim managedArray2(managedArray.Length) As Double

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)

            Console.WriteLine("The array was copied to unmanaged memory and back.")

        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)
        End Try

    End Sub
End Module

注解

非托管的 C 样式数组不包含边界信息，这阻止 startIndex 验证 和 length 参数。 因此，与 参数对应的 source 非托管数据将填充托管数组，而不考虑其有用性。 在调用此方法之前，必须使用适当的大小初始化托管数组。

另请参阅

• Copy(Int32[], Int32, IntPtr, Int32)

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

Source:

Marshal.cs

将数据从一维托管的 IntPtr 数组复制到非托管内存指针。

public:
 static void Copy(cli::array <IntPtr> ^ source, int startIndex, IntPtr destination, int length);

public static void Copy (IntPtr[] source, int startIndex, IntPtr destination, int length);

static member Copy : nativeint[] * int * nativeint * int -> unit

Public Shared Sub Copy (source As IntPtr(), startIndex As Integer, destination As IntPtr, length As Integer)

参数

source

IntPtr[]

nativeint[]

从中进行复制的一维数组。

startIndex

Int32

源数组中从零开始的索引，在此处开始复制。

destination

IntPtr

nativeint

要复制到的内存指针。

length

Int32

要复制的数组元素的数目。

例外

ArgumentNullException

source、destination、startIndex 或 length 为 null。

注解

可以使用此方法将一维托管 IntPtr 数组的子集复制到非托管 C 样式数组。

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

Source:

Marshal.cs

将数据从非托管内存指针复制到托管 8 位无符号整数数组。

public:
 static void Copy(IntPtr source, cli::array <System::Byte> ^ destination, int startIndex, int length);

public static void Copy (IntPtr source, byte[] destination, int startIndex, int length);

static member Copy : nativeint * byte[] * int * int -> unit

Public Shared Sub Copy (source As IntPtr, destination As Byte(), startIndex As Integer, length As Integer)

参数

source

IntPtr

nativeint

从中进行复制的内存指针。

destination

Byte[]

要复制到的数组。

startIndex

Int32

目标数组中从零开始的索引，在此处开始复制。

length

Int32

要复制的数组元素的数目。

例外

ArgumentNullException

source、destination、startIndex 或 length 为 null。

示例

以下示例将数组复制到非托管内存，然后将非托管数组复制回托管内存。

using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        byte[] managedArray = { 1, 2, 3, 4 };

        // Initialize unmanaged memory to hold the array.
        int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            byte[] managedArray2 = new byte[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

Imports System.Runtime.InteropServices



Module Example


    Sub Main()
        ' Create a managed array.
        Dim managedArray As Byte() = {1, 2, 3, 4}

        ' Initialize unmanaged memory to hold the array.
        Dim size As Integer = Marshal.SizeOf(managedArray(0)) * managedArray.Length

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.
            Dim managedArray2(managedArray.Length) As Byte

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)

            Console.WriteLine("The array was copied to unmanaged memory and back.")

        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)
        End Try

    End Sub
End Module

注解

非托管的 C 样式数组不包含边界信息，这阻止 startIndex 验证 和 length 参数。 因此，与 参数对应的 source 非托管数据将填充托管数组，而不考虑其有用性。 在调用此方法之前，必须使用适当的大小初始化托管数组。

另请参阅

• Copy(Int32[], Int32, IntPtr, Int32)

Copy(Int64[], Int32, IntPtr, Int32)

Source:

Marshal.cs

将数据从一维托管 64 位带符号整数数组复制到非托管内存指针。

public:
 static void Copy(cli::array <long> ^ source, int startIndex, IntPtr destination, int length);

public static void Copy (long[] source, int startIndex, IntPtr destination, int length);

static member Copy : int64[] * int * nativeint * int -> unit

Public Shared Sub Copy (source As Long(), startIndex As Integer, destination As IntPtr, length As Integer)

参数

source

Int64[]

从中进行复制的一维数组。

startIndex

Int32

源数组中从零开始的索引，在此处开始复制。

destination

IntPtr

nativeint

要复制到的内存指针。

length

Int32

要复制的数组元素的数目。

例外

ArgumentOutOfRangeException

startIndex 和 length 无效。

ArgumentNullException

source、startIndex、destination 或 length 为 null。

示例

以下示例将数组复制到非托管内存，然后将非托管数组复制回托管内存。

using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        Int64[] managedArray = { 1, 2, 3, 4 };

        // Initialize unmanaged memory to hold the array.
        int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            Int64[] managedArray2 = new Int64[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

Imports System.Runtime.InteropServices



Module Example


    Sub Main()
        ' Create a managed array.
        Dim managedArray As Int64() = {1, 2, 3, 4}

        ' Initialize unmanaged memory to hold the array.
        Dim size As Integer = Marshal.SizeOf(managedArray(0)) * managedArray.Length

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.
            Dim managedArray2(managedArray.Length) As Int64

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)

            Console.WriteLine("The array was copied to unmanaged memory and back.")

        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)
        End Try

    End Sub
End Module

注解

可以使用此方法将一维托管数组的子集复制到非托管 C 样式数组。

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

Source:

Marshal.cs

将数据从一维托管 32 位带符号整数数组复制到非托管内存指针。

public:
 static void Copy(cli::array <int> ^ source, int startIndex, IntPtr destination, int length);

public static void Copy (int[] source, int startIndex, IntPtr destination, int length);

static member Copy : int[] * int * nativeint * int -> unit

Public Shared Sub Copy (source As Integer(), startIndex As Integer, destination As IntPtr, length As Integer)

参数

source

Int32[]

从中进行复制的一维数组。

startIndex

Int32

源数组中从零开始的索引，在此处开始复制。

destination

IntPtr

nativeint

要复制到的内存指针。

length

Int32

要复制的数组元素的数目。

例外

ArgumentOutOfRangeException

startIndex 和 length 无效。

ArgumentNullException

startIndex 或 length 为 null。

示例

以下示例将数组复制到非托管内存，然后将非托管数组复制回托管内存。

using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        int[] managedArray = { 1, 2, 3, 4 };

        // Initialize unmanaged memory to hold the array.
        int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            int[] managedArray2 = new int[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

Imports System.Runtime.InteropServices



Module Example


    Sub Main()
        ' Create a managed array.
        Dim managedArray As Integer() = {1, 2, 3, 4}

        ' Initialize unmanaged memory to hold the array.
        Dim size As Integer = Marshal.SizeOf(managedArray(0)) * managedArray.Length

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.
            Dim managedArray2(managedArray.Length) As Integer

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)

            Console.WriteLine("The array was copied to unmanaged memory and back.")

        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)
        End Try

    End Sub
End Module

注解

可以使用此方法将一维托管数组的子集复制到非托管 C 样式数组。

Copy(Int16[], Int32, IntPtr, Int32)

Source:

Marshal.cs

将数据从一维托管 16 位带符号整数数组复制到非托管内存指针。

public:
 static void Copy(cli::array <short> ^ source, int startIndex, IntPtr destination, int length);

public static void Copy (short[] source, int startIndex, IntPtr destination, int length);

static member Copy : int16[] * int * nativeint * int -> unit

Public Shared Sub Copy (source As Short(), startIndex As Integer, destination As IntPtr, length As Integer)

参数

source

Int16[]

从中进行复制的一维数组。

startIndex

Int32

源数组中从零开始的索引，在此处开始复制。

destination

IntPtr

nativeint

要复制到的内存指针。

length

Int32

要复制的数组元素的数目。

例外

ArgumentOutOfRangeException

startIndex 和 length 无效。

ArgumentNullException

source、startIndex、destination 或 length 为 null。

示例

以下示例将数组复制到非托管内存，然后将非托管数组复制回托管内存。

using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        short[] managedArray = { 1, 2, 3, 4 };

        // Initialize unmanaged memory to hold the array.
        int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            short[] managedArray2 = new short[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

Imports System.Runtime.InteropServices



Module Example


    Sub Main()
        ' Create a managed array.
        Dim managedArray As Short() = {1, 2, 3, 4}

        ' Initialize unmanaged memory to hold the array.
        Dim size As Integer = Marshal.SizeOf(managedArray(0)) * managedArray.Length

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.
            Dim managedArray2(managedArray.Length) As Short

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)

            Console.WriteLine("The array was copied to unmanaged memory and back.")

        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)
        End Try

    End Sub
End Module

注解

可以使用此方法将一维托管数组的子集复制到非托管 C 样式数组。

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

Source:

Marshal.cs

将数据从一维托管双精度浮点数数组复制到非托管内存指针。

public:
 static void Copy(cli::array <double> ^ source, int startIndex, IntPtr destination, int length);

public static void Copy (double[] source, int startIndex, IntPtr destination, int length);

static member Copy : double[] * int * nativeint * int -> unit

Public Shared Sub Copy (source As Double(), startIndex As Integer, destination As IntPtr, length As Integer)

参数

source

Double[]

从中进行复制的一维数组。

startIndex

Int32

源数组中从零开始的索引，在此处开始复制。

destination

IntPtr

nativeint

要复制到的内存指针。

length

Int32

要复制的数组元素的数目。

例外

ArgumentOutOfRangeException

startIndex 和 length 无效。

ArgumentNullException

source、startIndex、destination 或 length 为 null。

示例

以下示例将数组复制到非托管内存，然后将非托管数组复制回托管内存。

using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        double[] managedArray = { 0.1, 0.2, 0.3, 0.4 };

        // Initialize unmanaged memory to hold the array.
        int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            double[] managedArray2 = new double[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

Imports System.Runtime.InteropServices



Module Example


    Sub Main()
        ' Create a managed array.
        Dim managedArray As Double() = {0.1, 0.2, 0.3, 0.4}

        ' Initialize unmanaged memory to hold the array.
        Dim size As Integer = Marshal.SizeOf(managedArray(0)) * managedArray.Length

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.
            Dim managedArray2(managedArray.Length) As Double

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)

            Console.WriteLine("The array was copied to unmanaged memory and back.")

        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)
        End Try

    End Sub
End Module

注解

可以使用此方法将一维托管数组的子集复制到非托管 C 样式数组。

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

Source:

Marshal.cs

将数据从一维托管字符数组复制到非托管内存指针。

public:
 static void Copy(cli::array <char> ^ source, int startIndex, IntPtr destination, int length);

public static void Copy (char[] source, int startIndex, IntPtr destination, int length);

static member Copy : char[] * int * nativeint * int -> unit

Public Shared Sub Copy (source As Char(), startIndex As Integer, destination As IntPtr, length As Integer)

参数

source

Char[]

从中进行复制的一维数组。

startIndex

Int32

源数组中从零开始的索引，在此处开始复制。

destination

IntPtr

nativeint

要复制到的内存指针。

length

Int32

要复制的数组元素的数目。

例外

ArgumentOutOfRangeException

startIndex 和 length 无效。

ArgumentNullException

startIndex、destination 或 length 为 null。

示例

以下示例将数组复制到非托管内存，然后将非托管数组复制回托管内存。

// Remember that the actual size of System.Char in unmanaged memory is 2.
using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        char[] managedArray = new char[1000];
        managedArray[0] = 'a';
        managedArray[1] = 'b';
        managedArray[2] = 'c';
        managedArray[3] = 'd';
        managedArray[999] = 'Z';

        // Initialize unmanaged memory to hold the array.
        // int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;  // Incorrect
        int size = Marshal.SystemDefaultCharSize * managedArray.Length;       // Correct

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            char[] managedArray2 = new char[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);
            Console.WriteLine("Here is the roundtripped array: {0} {1} {2} {3} {4}",
                               managedArray2[0], managedArray2[1], managedArray2[2], managedArray2[3],
                               managedArray2[999]);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

' Remember that the actual size of System.Char in unmanaged memory is 2.

Imports System.Runtime.InteropServices



Module Module1

    Sub Main()
        ' Create a managed array.
        Dim managedArray As Char() = New Char(999) {}
        managedArray(0) = "a"c
        managedArray(1) = "b"c
        managedArray(2) = "c"c
        managedArray(3) = "d"c
        managedArray(999) = "Z"c

        ' Initialize unmanaged memory to hold the array.
        ' Dim size As Integer = Marshal.SizeOf(managedArray[0]) * managedArray.Length;  ' Incorrect
        Dim size As Integer = Marshal.SystemDefaultCharSize * managedArray.Length       ' Correct

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.

            Dim managedArray2 As Char() = New Char(managedArray.Length - 1) {}

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)
            Console.WriteLine("Here is the roundtripped array: {0} {1} {2} {3} {4}", managedArray2(0), managedArray2(1), managedArray2(2), managedArray2(3), managedArray2(999))


            Console.WriteLine("The array was copied to unmanaged memory and back.")
        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)

        End Try
    End Sub
End Module

注解

可以使用此方法将一维托管数组的子集复制到非托管 C 样式数组。

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

Source:

Marshal.cs

将数据从非托管内存指针复制到托管字符数组。

public:
 static void Copy(IntPtr source, cli::array <char> ^ destination, int startIndex, int length);

public static void Copy (IntPtr source, char[] destination, int startIndex, int length);

static member Copy : nativeint * char[] * int * int -> unit

Public Shared Sub Copy (source As IntPtr, destination As Char(), startIndex As Integer, length As Integer)

参数

source

IntPtr

nativeint

从中进行复制的内存指针。

destination

Char[]

要复制到的数组。

startIndex

Int32

目标数组中从零开始的索引，在此处开始复制。

length

Int32

要复制的数组元素的数目。

例外

ArgumentNullException

source、destination、startIndex 或 length 为 null。

示例

以下示例将数组复制到非托管内存，然后将非托管数组复制回托管内存。

// Remember that the actual size of System.Char in unmanaged memory is 2.
using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        char[] managedArray = new char[1000];
        managedArray[0] = 'a';
        managedArray[1] = 'b';
        managedArray[2] = 'c';
        managedArray[3] = 'd';
        managedArray[999] = 'Z';

        // Initialize unmanaged memory to hold the array.
        // int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;  // Incorrect
        int size = Marshal.SystemDefaultCharSize * managedArray.Length;       // Correct

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            char[] managedArray2 = new char[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);
            Console.WriteLine("Here is the roundtripped array: {0} {1} {2} {3} {4}",
                               managedArray2[0], managedArray2[1], managedArray2[2], managedArray2[3],
                               managedArray2[999]);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

' Remember that the actual size of System.Char in unmanaged memory is 2.

Imports System.Runtime.InteropServices



Module Module1

    Sub Main()
        ' Create a managed array.
        Dim managedArray As Char() = New Char(999) {}
        managedArray(0) = "a"c
        managedArray(1) = "b"c
        managedArray(2) = "c"c
        managedArray(3) = "d"c
        managedArray(999) = "Z"c

        ' Initialize unmanaged memory to hold the array.
        ' Dim size As Integer = Marshal.SizeOf(managedArray[0]) * managedArray.Length;  ' Incorrect
        Dim size As Integer = Marshal.SystemDefaultCharSize * managedArray.Length       ' Correct

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.

            Dim managedArray2 As Char() = New Char(managedArray.Length - 1) {}

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)
            Console.WriteLine("Here is the roundtripped array: {0} {1} {2} {3} {4}", managedArray2(0), managedArray2(1), managedArray2(2), managedArray2(3), managedArray2(999))


            Console.WriteLine("The array was copied to unmanaged memory and back.")
        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)

        End Try
    End Sub
End Module

注解

非托管的 C 样式数组不包含边界信息，这阻止 startIndex 验证 和 length 参数。 因此，与 参数对应的 source 非托管数据将填充托管数组，而不考虑其有用性。 在调用此方法之前，必须使用适当的大小初始化托管数组。

另请参阅

• Copy(Int32[], Int32, IntPtr, Int32)

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

Source:

Marshal.cs

将数据从一维托管 8 位无符号整数数组复制到非托管内存指针。

public:
 static void Copy(cli::array <System::Byte> ^ source, int startIndex, IntPtr destination, int length);

public static void Copy (byte[] source, int startIndex, IntPtr destination, int length);

static member Copy : byte[] * int * nativeint * int -> unit

Public Shared Sub Copy (source As Byte(), startIndex As Integer, destination As IntPtr, length As Integer)

参数

source

Byte[]

从中进行复制的一维数组。

startIndex

Int32

源数组中从零开始的索引，在此处开始复制。

destination

IntPtr

nativeint

要复制到的内存指针。

length

Int32

要复制的数组元素的数目。

例外

ArgumentOutOfRangeException

startIndex 和 length 无效。

ArgumentNullException

source、startIndex、destination 或 length 为 null。

示例

以下示例使用 Copy(Byte[], Int32, IntPtr, Int32) 重载将数组复制到非托管内存，然后使用 重载将非托管数组复制回托管内存 Copy(IntPtr, Byte[], Int32, Int32) 。

using System;
using System.Runtime.InteropServices;

class Example
{

    static void Main()
    {
        // Create a managed array.
        byte[] managedArray = { 1, 2, 3, 4 };

        // Initialize unmanaged memory to hold the array.
        int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;

        IntPtr pnt = Marshal.AllocHGlobal(size);

        try
        {
            // Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length);

            // Copy the unmanaged array back to another managed array.

            byte[] managedArray2 = new byte[managedArray.Length];

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);

            Console.WriteLine("The array was copied to unmanaged memory and back.");
        }
        finally
        {
            // Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt);
        }
    }
}

Imports System.Runtime.InteropServices



Module Example


    Sub Main()
        ' Create a managed array.
        Dim managedArray As Byte() = {1, 2, 3, 4}

        ' Initialize unmanaged memory to hold the array.
        Dim size As Integer = Marshal.SizeOf(managedArray(0)) * managedArray.Length

        Dim pnt As IntPtr = Marshal.AllocHGlobal(size)

        Try
            ' Copy the array to unmanaged memory.
            Marshal.Copy(managedArray, 0, pnt, managedArray.Length)

            ' Copy the unmanaged array back to another managed array.
            Dim managedArray2(managedArray.Length) As Byte

            Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)

            Console.WriteLine("The array was copied to unmanaged memory and back.")

        Finally
            ' Free the unmanaged memory.
            Marshal.FreeHGlobal(pnt)
        End Try

    End Sub
End Module

注解

可以使用此方法将一维托管数组的子集复制到非托管 C 样式数组。