Marshal.WriteInt32 方法

定義

命名空間:: System.Runtime.InteropServices

組件:: mscorlib.dll, System.Runtime.InteropServices.dll

組件:: netstandard.dll, System.Runtime.InteropServices.dll

組件:: System.Runtime.InteropServices.dll

組件:: mscorlib.dll

組件:: netstandard.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

將 32 位元有符號整數值寫入未管理記憶體。支援寫入未對齊的記憶體位置。

多載

名稱	Description
WriteInt32(Object, Int32, Int32)	已淘汰. 在指定偏移量處寫入一個 32 位元有符號的整數值到未管理記憶體。
WriteInt32(IntPtr, Int32)	將 32 位元有符號整數值寫入未管理記憶體。
WriteInt32(IntPtr, Int32, Int32)	在指定偏移量處寫入 32 位元有符號整數值到未管理記憶體。

WriteInt32(Object, Int32, Int32)

來源:: Marshal.CoreCLR.cs

來源:: Marshal.CoreCLR.cs

來源:: Marshal.CoreCLR.cs

來源:: Marshal.CoreCLR.cs

來源:: Marshal.CoreCLR.cs

警告

WriteInt32(Object, Int32, Int32) may be unavailable in future releases.

在指定偏移量處寫入一個 32 位元有符號的整數值到未管理記憶體。

public:
 static void WriteInt32(System::Object ^ ptr, int ofs, int val);

[System.Obsolete("WriteInt32(Object, Int32, Int32) may be unavailable in future releases.")]
[System.Security.SecurityCritical]
public static void WriteInt32(object ptr, int ofs, int val);

[System.Obsolete("WriteInt32(Object, Int32, Int32) may be unavailable in future releases.")]
[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Marshalling code for the object might not be available")]
public static void WriteInt32(object ptr, int ofs, int val);

[System.Obsolete("WriteInt32(Object, Int32, Int32) may be unavailable in future releases.")]
public static void WriteInt32(object ptr, int ofs, int val);

public static void WriteInt32(object ptr, int ofs, int val);

[System.Security.SecurityCritical]
public static void WriteInt32(object ptr, int ofs, int val);

[<System.Obsolete("WriteInt32(Object, Int32, Int32) may be unavailable in future releases.")>]
[<System.Security.SecurityCritical>]
static member WriteInt32 : obj * int * int -> unit

[<System.Obsolete("WriteInt32(Object, Int32, Int32) may be unavailable in future releases.")>]
[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Marshalling code for the object might not be available")>]
static member WriteInt32 : obj * int * int -> unit

[<System.Obsolete("WriteInt32(Object, Int32, Int32) may be unavailable in future releases.")>]
static member WriteInt32 : obj * int * int -> unit

static member WriteInt32 : obj * int * int -> unit

[<System.Security.SecurityCritical>]
static member WriteInt32 : obj * int * int -> unit

Public Shared Sub WriteInt32 (ptr As Object, ofs As Integer, val As Integer)

參數

ptr: Object

目標物件在未管理記憶體中的基底位址。

ofs: Int32

一個額外的位元組偏移量，會在寫入參數前加入 ptr 。

val: Int32

要寫入的值。

屬性: ObsoleteAttribute SecurityCriticalAttribute RequiresDynamicCodeAttribute

例外狀況

AccessViolationException

基底位址（ptr）加上偏移位元組（ofs）會產生空位址或無效位址。

ArgumentException

ptr 是一個 ArrayWithOffset 物件。此方法不接受 ArrayWithOffset 參數。

備註

WriteInt32 它能直接與非管理的 32 位元有號陣列互動，省去在設定元素值前將整個非管理陣列 Marshal.Copy複製到獨立管理陣列的成本。

支援寫入未對齊的記憶體位置。

另請參閱

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

適用於

WriteInt32(IntPtr, Int32)

來源:: Marshal.cs

來源:: Marshal.cs

來源:: Marshal.cs

來源:: Marshal.cs

來源:: Marshal.cs

將 32 位元有符號整數值寫入未管理記憶體。

public:
 static void WriteInt32(IntPtr ptr, int val);

public static void WriteInt32(IntPtr ptr, int val);

static member WriteInt32 : nativeint * int -> unit

Public Shared Sub WriteInt32 (ptr As IntPtr, val As Integer)

參數

ptr: IntPtr
nativeint

寫入的非管理記憶體位址。

val: Int32

要寫入的值。

例外狀況

AccessViolationException

ptr 並非被認可的格式。

-或-

ptr 是 null。

-或-

ptr 無效。

範例

以下範例示範如何利用 ReadInt32 and WriteInt32 方法讀寫未管理陣列。

static void ReadWriteInt32()
{
    // Allocate unmanaged memory. 
    int elementSize = 4;
    IntPtr unmanagedArray = Marshal.AllocHGlobal(10 * elementSize);

    // Set the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
    {
        Marshal.WriteInt32(unmanagedArray, i * elementSize, ((Int32)(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.ReadInt32(unmanagedArray, i * elementSize));
    }

    Marshal.FreeHGlobal(unmanagedArray);

    Console.WriteLine("Done. Press Enter to continue.");
    Console.ReadLine();
}

Sub ReadWriteInt32()
    ' Allocate unmanaged memory. 
    Dim elementSize As Integer = 4
    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.WriteInt32(unmanagedArray, i * elementSize, CType(i + 1, Int32))
    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.ReadInt32(unmanagedArray, i * elementSize))
    Next i

    Marshal.FreeHGlobal(unmanagedArray)

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

備註

WriteInt32 它能直接與非管理的 32 位元有號陣列互動，省去在設定元素值前將整個非管理陣列 Marshal.Copy複製到獨立管理陣列的成本。

支援寫入未對齊的記憶體位置。

另請參閱

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

適用於

WriteInt32(IntPtr, Int32, Int32)

來源:: Marshal.cs

來源:: Marshal.cs

來源:: Marshal.cs

來源:: Marshal.cs

來源:: Marshal.cs

在指定偏移量處寫入 32 位元有符號整數值到未管理記憶體。

public:
 static void WriteInt32(IntPtr ptr, int ofs, int val);

public static void WriteInt32(IntPtr ptr, int ofs, int val);

static member WriteInt32 : nativeint * int * int -> unit

Public Shared Sub WriteInt32 (ptr As IntPtr, ofs As Integer, val As Integer)

參數

ptr: IntPtr
nativeint

寫入的非管理記憶體中的基底位址。

ofs: Int32

一個額外的位元組偏移量，會在寫入參數前加入 ptr 。

val: Int32

要寫入的值。

例外狀況

AccessViolationException

基底位址（ptr）加上偏移位元組（ofs）會產生空位址或無效位址。

範例

以下範例示範如何利用 ReadInt32 and WriteInt32 方法讀寫未管理陣列。

static void ReadWriteInt32()
{
    // Allocate unmanaged memory. 
    int elementSize = 4;
    IntPtr unmanagedArray = Marshal.AllocHGlobal(10 * elementSize);

    // Set the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
    {
        Marshal.WriteInt32(unmanagedArray, i * elementSize, ((Int32)(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.ReadInt32(unmanagedArray, i * elementSize));
    }

    Marshal.FreeHGlobal(unmanagedArray);

    Console.WriteLine("Done. Press Enter to continue.");
    Console.ReadLine();
}

Sub ReadWriteInt32()
    ' Allocate unmanaged memory. 
    Dim elementSize As Integer = 4
    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.WriteInt32(unmanagedArray, i * elementSize, CType(i + 1, Int32))
    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.ReadInt32(unmanagedArray, i * elementSize))
    Next i

    Marshal.FreeHGlobal(unmanagedArray)

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

備註

WriteInt32 它能直接與非管理的 32 位元有號陣列互動，省去在設定元素值前將整個非管理陣列 Marshal.Copy複製到獨立管理陣列的成本。

支援寫入未對齊的記憶體位置。

另請參閱

適用於

意見反應

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