Edit

Marshal.WriteInt16 Method

  • Reference

Definition

Namespace:
System.Runtime.InteropServices
Assembly:
System.Runtime.InteropServices.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll

Writes a 16-bit signed integer value to unmanaged memory. Writing to unaligned memory locations is supported.

Overloads

WriteInt16(IntPtr, Char)

Writes a character as a 16-bit integer value to unmanaged memory.
WriteInt16(IntPtr, Int16)

Writes a 16-bit integer value to unmanaged memory.
WriteInt16(IntPtr, Int32, Char)

Writes a 16-bit signed integer value to unmanaged memory at a specified offset.
WriteInt16(IntPtr, Int32, Int16)

Writes a 16-bit signed integer value into unmanaged memory at a specified offset.
WriteInt16(Object, Int32, Char)
Obsolete.

Writes a 16-bit signed integer value to unmanaged memory at a specified offset.
WriteInt16(Object, Int32, Int16)
Obsolete.

Writes a 16-bit signed integer value to unmanaged memory at a specified offset.

WriteInt16(IntPtr, Char)

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

Writes a character as a 16-bit integer value to unmanaged memory.

public:
 static void WriteInt16(IntPtr ptr, char val);
[System.Security.SecurityCritical]
public static void WriteInt16 (IntPtr ptr, char val);
public static void WriteInt16 (IntPtr ptr, char val);
[<System.Security.SecurityCritical>]
static member WriteInt16 : nativeint * char -> unit
static member WriteInt16 : nativeint * char -> unit
Public Shared Sub WriteInt16 (ptr As IntPtr, val As Char)

Parameters

ptr
IntPtr

nativeint

The address in unmanaged memory to write to.

val
Char

The value to write.

Attributes
SecurityCriticalAttribute

Exceptions

AccessViolationException

ptr is not a recognized format.

-or-

ptr is null.

-or-

ptr is invalid.

Examples

The following example demonstrates how to read and write to an unmanaged array using the ReadInt16 and WriteInt16 methods.

static void ReadWriteInt16()
{
    // Allocate unmanaged memory. 
    int elementSize = 2;
    IntPtr unmanagedArray = Marshal.AllocHGlobal(10 * elementSize);

    // Set the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
    {
        Marshal.WriteInt16(unmanagedArray, i * elementSize, ((Int16)(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.ReadInt16(unmanagedArray, i * elementSize));
    }

    Marshal.FreeHGlobal(unmanagedArray);

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

Sub ReadWriteInt16()
    ' Allocate unmanaged memory. 
    Dim elementSize As Integer = 2
    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.WriteInt16(unmanagedArray, i * elementSize, CType(i + 1, Int16))
    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.ReadInt16(unmanagedArray, i * elementSize))
    Next i

    Marshal.FreeHGlobal(unmanagedArray)

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

Remarks

WriteInt16 enables direct interaction with an unmanaged 16-bit signed array, eliminating the expense of copying an entire unmanaged array (using Marshal.Copy) to a separate managed array before setting its element values.

Writing to unaligned memory locations is supported.

See also

Applies to

WriteInt16(IntPtr, Int16)

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

Writes a 16-bit integer value to unmanaged memory.

public:
 static void WriteInt16(IntPtr ptr, short val);
[System.Security.SecurityCritical]
public static void WriteInt16 (IntPtr ptr, short val);
public static void WriteInt16 (IntPtr ptr, short val);
[<System.Security.SecurityCritical>]
static member WriteInt16 : nativeint * int16 -> unit
static member WriteInt16 : nativeint * int16 -> unit
Public Shared Sub WriteInt16 (ptr As IntPtr, val As Short)

Parameters

ptr
IntPtr

nativeint

The address in unmanaged memory to write to.

val
Int16

The value to write.

Attributes
SecurityCriticalAttribute

Exceptions

AccessViolationException

ptr is not a recognized format.

-or-

ptr is null.

-or-

ptr is invalid.

Examples

The following example demonstrates how to read and write to an unmanaged array using the ReadInt16 and WriteInt16 methods.

static void ReadWriteInt16()
{
    // Allocate unmanaged memory. 
    int elementSize = 2;
    IntPtr unmanagedArray = Marshal.AllocHGlobal(10 * elementSize);

    // Set the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
    {
        Marshal.WriteInt16(unmanagedArray, i * elementSize, ((Int16)(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.ReadInt16(unmanagedArray, i * elementSize));
    }

    Marshal.FreeHGlobal(unmanagedArray);

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

Sub ReadWriteInt16()
    ' Allocate unmanaged memory. 
    Dim elementSize As Integer = 2
    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.WriteInt16(unmanagedArray, i * elementSize, CType(i + 1, Int16))
    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.ReadInt16(unmanagedArray, i * elementSize))
    Next i

    Marshal.FreeHGlobal(unmanagedArray)

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

Remarks

WriteInt16 enables direct interaction with an unmanaged 16-bit signed array, eliminating the expense of copying an entire unmanaged array (using Marshal.Copy) to a separate managed array before setting its element values.

Writing to unaligned memory locations is supported.

See also

Applies to

WriteInt16(IntPtr, Int32, Char)

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

Writes a 16-bit signed integer value to unmanaged memory at a specified offset.

public:
 static void WriteInt16(IntPtr ptr, int ofs, char val);
[System.Security.SecurityCritical]
public static void WriteInt16 (IntPtr ptr, int ofs, char val);
public static void WriteInt16 (IntPtr ptr, int ofs, char val);
[<System.Security.SecurityCritical>]
static member WriteInt16 : nativeint * int * char -> unit
static member WriteInt16 : nativeint * int * char -> unit
Public Shared Sub WriteInt16 (ptr As IntPtr, ofs As Integer, val As Char)

Parameters

ptr
IntPtr

nativeint

The base address in the native heap to write to.

ofs
Int32

An additional byte offset, which is added to the ptr parameter before writing.

val
Char

The value to write.

Attributes
SecurityCriticalAttribute

Exceptions

AccessViolationException

Base address (ptr) plus offset byte (ofs) produces a null or invalid address.

Examples

The following example demonstrates how to read and write to an unmanaged array using the ReadInt16 and WriteInt16 methods.

static void ReadWriteInt16()
{
    // Allocate unmanaged memory. 
    int elementSize = 2;
    IntPtr unmanagedArray = Marshal.AllocHGlobal(10 * elementSize);

    // Set the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
    {
        Marshal.WriteInt16(unmanagedArray, i * elementSize, ((Int16)(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.ReadInt16(unmanagedArray, i * elementSize));
    }

    Marshal.FreeHGlobal(unmanagedArray);

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

Sub ReadWriteInt16()
    ' Allocate unmanaged memory. 
    Dim elementSize As Integer = 2
    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.WriteInt16(unmanagedArray, i * elementSize, CType(i + 1, Int16))
    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.ReadInt16(unmanagedArray, i * elementSize))
    Next i

    Marshal.FreeHGlobal(unmanagedArray)

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

Remarks

WriteInt16 enables direct interaction with an unmanaged 16-bit signed array, eliminating the expense of copying an entire unmanaged array (using Marshal.Copy) to a separate managed array before setting its element values.

Writing to unaligned memory locations is supported.

See also

Applies to

WriteInt16(IntPtr, Int32, Int16)

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

Writes a 16-bit signed integer value into unmanaged memory at a specified offset.

public:
 static void WriteInt16(IntPtr ptr, int ofs, short val);
[System.Security.SecurityCritical]
public static void WriteInt16 (IntPtr ptr, int ofs, short val);
public static void WriteInt16 (IntPtr ptr, int ofs, short val);
[<System.Security.SecurityCritical>]
static member WriteInt16 : nativeint * int * int16 -> unit
static member WriteInt16 : nativeint * int * int16 -> unit
Public Shared Sub WriteInt16 (ptr As IntPtr, ofs As Integer, val As Short)

Parameters

ptr
IntPtr

nativeint

The base address in unmanaged memory to write to.

ofs
Int32

An additional byte offset, which is added to the ptr parameter before writing.

val
Int16

The value to write.

Attributes
SecurityCriticalAttribute

Exceptions

AccessViolationException

Base address (ptr) plus offset byte (ofs) produces a null or invalid address.

Examples

The following example demonstrates how to read and write to an unmanaged array using the ReadInt16 and WriteInt16 methods.

static void ReadWriteInt16()
{
    // Allocate unmanaged memory. 
    int elementSize = 2;
    IntPtr unmanagedArray = Marshal.AllocHGlobal(10 * elementSize);

    // Set the 10 elements of the C-style unmanagedArray
    for (int i = 0; i < 10; i++)
    {
        Marshal.WriteInt16(unmanagedArray, i * elementSize, ((Int16)(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.ReadInt16(unmanagedArray, i * elementSize));
    }

    Marshal.FreeHGlobal(unmanagedArray);

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

Sub ReadWriteInt16()
    ' Allocate unmanaged memory. 
    Dim elementSize As Integer = 2
    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.WriteInt16(unmanagedArray, i * elementSize, CType(i + 1, Int16))
    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.ReadInt16(unmanagedArray, i * elementSize))
    Next i

    Marshal.FreeHGlobal(unmanagedArray)

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

Remarks

WriteInt16 enables direct interaction with an unmanaged 16-bit signed array, eliminating the expense of copying an entire unmanaged array (using Marshal.Copy) to a separate managed array before setting its element values.

Writing to unaligned memory locations is supported.

See also

Applies to

WriteInt16(Object, Int32, Char)

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

Caution

WriteInt16(Object, Int32, Char) may be unavailable in future releases.

Writes a 16-bit signed integer value to unmanaged memory at a specified offset.

public:
 static void WriteInt16(System::Object ^ ptr, int ofs, char val);
[System.Obsolete("WriteInt16(Object, Int32, Char) may be unavailable in future releases.")]
[System.Security.SecurityCritical]
public static void WriteInt16 (object ptr, int ofs, char val);
[System.Obsolete("WriteInt16(Object, Int32, Char) may be unavailable in future releases.")]
public static void WriteInt16 (object ptr, int ofs, char val);
public static void WriteInt16 (object ptr, int ofs, char val);
[System.Security.SecurityCritical]
public static void WriteInt16 (object ptr, int ofs, char val);
[<System.Obsolete("WriteInt16(Object, Int32, Char) may be unavailable in future releases.")>]
[<System.Security.SecurityCritical>]
static member WriteInt16 : obj * int * char -> unit
[<System.Obsolete("WriteInt16(Object, Int32, Char) may be unavailable in future releases.")>]
static member WriteInt16 : obj * int * char -> unit
static member WriteInt16 : obj * int * char -> unit
[<System.Security.SecurityCritical>]
static member WriteInt16 : obj * int * char -> unit
Public Shared Sub WriteInt16 (ptr As Object, ofs As Integer, val As Char)

Parameters

ptr
Object

The base address in unmanaged memory of the target object.

ofs
Int32

An additional byte offset, which is added to the ptr parameter before writing.

val
Char

The value to write.

Attributes
ObsoleteAttribute SecurityCriticalAttribute

Exceptions

AccessViolationException

Base address (ptr) plus offset byte (ofs) produces a null or invalid address.

ArgumentException

ptr is an ArrayWithOffset object. This method does not accept ArrayWithOffset parameters.

Remarks

WriteInt16 enables direct interaction with an unmanaged 16-bit signed array, eliminating the expense of copying an entire unmanaged array (using Marshal.Copy) to a separate managed array before setting its element values.

Writing to unaligned memory locations is supported.

See also

Applies to

WriteInt16(Object, Int32, Int16)

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

Caution

WriteInt16(Object, Int32, Int16) may be unavailable in future releases.

Writes a 16-bit signed integer value to unmanaged memory at a specified offset.

public:
 static void WriteInt16(System::Object ^ ptr, int ofs, short val);
[System.Obsolete("WriteInt16(Object, Int32, Int16) may be unavailable in future releases.")]
[System.Security.SecurityCritical]
public static void WriteInt16 (object ptr, int ofs, short val);
[System.Obsolete("WriteInt16(Object, Int32, Int16) may be unavailable in future releases.")]
public static void WriteInt16 (object ptr, int ofs, short val);
public static void WriteInt16 (object ptr, int ofs, short val);
[System.Security.SecurityCritical]
public static void WriteInt16 (object ptr, int ofs, short val);
[<System.Obsolete("WriteInt16(Object, Int32, Int16) may be unavailable in future releases.")>]
[<System.Security.SecurityCritical>]
static member WriteInt16 : obj * int * int16 -> unit
[<System.Obsolete("WriteInt16(Object, Int32, Int16) may be unavailable in future releases.")>]
static member WriteInt16 : obj * int * int16 -> unit
static member WriteInt16 : obj * int * int16 -> unit
[<System.Security.SecurityCritical>]
static member WriteInt16 : obj * int * int16 -> unit
Public Shared Sub WriteInt16 (ptr As Object, ofs As Integer, val As Short)

Parameters

ptr
Object

The base address in unmanaged memory of the target object.

ofs
Int32

An additional byte offset, which is added to the ptr parameter before writing.

val
Int16

The value to write.

Attributes
ObsoleteAttribute SecurityCriticalAttribute

Exceptions

AccessViolationException

Base address (ptr) plus offset byte (ofs) produces a null or invalid address.

ArgumentException

ptr is an ArrayWithOffset object. This method does not accept ArrayWithOffset parameters.

Remarks

WriteInt16 enables direct interaction with an unmanaged 16-bit signed array, eliminating the expense of copying an entire unmanaged array (using Marshal.Copy) to a separate managed array before setting its element values.

Writing to unaligned memory locations is supported.

See also

Applies to