MemoryStream Constructors
Definition
Important
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Initializes a new instance of the MemoryStream class.
Overloads
| MemoryStream() |
Initializes a new instance of the MemoryStream class with an expandable capacity initialized to zero. |
| MemoryStream(Byte[]) |
Initializes a new non-resizable instance of the MemoryStream class based on the specified byte array. |
| MemoryStream(Int32) |
Initializes a new instance of the MemoryStream class with an expandable capacity initialized as specified. |
| MemoryStream(Byte[], Boolean) |
Initializes a new non-resizable instance of the MemoryStream class based on the specified byte array with the CanWrite property set as specified. |
| MemoryStream(Byte[], Int32, Int32) |
Initializes a new non-resizable instance of the MemoryStream class based on the specified region (index) of a byte array. |
| MemoryStream(Byte[], Int32, Int32, Boolean) |
Initializes a new non-resizable instance of the MemoryStream class based on the specified region of a byte array, with the CanWrite property set as specified. |
| MemoryStream(Byte[], Int32, Int32, Boolean, Boolean) |
Initializes a new instance of the MemoryStream class based on the specified region of a byte array, with the CanWrite property set as specified, and the ability to call GetBuffer() set as specified. |
MemoryStream()
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
Initializes a new instance of the MemoryStream class with an expandable capacity initialized to zero.
public:
MemoryStream();public MemoryStream ();Public Sub New ()Remarks
The CanRead, CanSeek, and CanWrite properties are all set to true.
The capacity of the current stream automatically increases when you use the SetLength method to set the length to a value larger than the capacity of the current stream.
This constructor exposes the underlying stream, which GetBuffer returns.
See also
Applies to
MemoryStream(Byte[])
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
Initializes a new non-resizable instance of the MemoryStream class based on the specified byte array.
public:
MemoryStream(cli::array <System::Byte> ^ buffer);public MemoryStream (byte[] buffer);new System.IO.MemoryStream : byte[] -> System.IO.MemoryStreamPublic Sub New (buffer As Byte())Parameters
- buffer
- Byte[]
The array of unsigned bytes from which to create the current stream.
Exceptions
buffer is null.
Remarks
The CanRead, CanSeek, and CanWrite properties are all set to true. Capacity is set to the length of the specified byte array. The new stream can be written to, but is not resizable.
The length of the stream cannot be set to a value greater than the initial length of the specified byte array; however, the stream can be truncated (see SetLength).
This constructor does not expose the underlying stream. GetBuffer throws UnauthorizedAccessException.
See also
Applies to
MemoryStream(Int32)
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
Initializes a new instance of the MemoryStream class with an expandable capacity initialized as specified.
public:
MemoryStream(int capacity);public MemoryStream (int capacity);new System.IO.MemoryStream : int -> System.IO.MemoryStreamPublic Sub New (capacity As Integer)Parameters
- capacity
- Int32
The initial size of the internal array in bytes.
Exceptions
capacity is negative.
Examples
This code example is part of a larger example provided for the MemoryStream class.
MemoryStream^ memStream = gcnew MemoryStream( 100 );
using(MemoryStream memStream = new MemoryStream(100))
Dim memStream As New MemoryStream(100)
Remarks
The CanRead, CanSeek, and CanWrite properties are all set to true.
The capacity automatically increases when you use the SetLength method to set the length to a value larger than the capacity of the current stream. Except for a MemoryStream constructed with a byte[] parameter, write operations at the end of a MemoryStream expand the MemoryStream.
This constructor exposes the underlying stream that GetBuffer returns.
See also
Applies to
MemoryStream(Byte[], Boolean)
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
Initializes a new non-resizable instance of the MemoryStream class based on the specified byte array with the CanWrite property set as specified.
public:
MemoryStream(cli::array <System::Byte> ^ buffer, bool writable);public MemoryStream (byte[] buffer, bool writable);new System.IO.MemoryStream : byte[] * bool -> System.IO.MemoryStreamPublic Sub New (buffer As Byte(), writable As Boolean)Parameters
- buffer
- Byte[]
The array of unsigned bytes from which to create this stream.
- writable
- Boolean
The setting of the CanWrite property, which determines whether the stream supports writing.
Exceptions
buffer is null.
Remarks
The CanRead and CanSeek properties are both set to true. Capacity is set to the length of the specified byte array.
The length of the stream cannot be set to a value greater than the initial length of the specified byte array; however, the stream can be truncated (see SetLength).
This constructor does not expose the underlying stream. GetBuffer throws UnauthorizedAccessException.
See also
Applies to
MemoryStream(Byte[], Int32, Int32)
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
Initializes a new non-resizable instance of the MemoryStream class based on the specified region (index) of a byte array.
public:
MemoryStream(cli::array <System::Byte> ^ buffer, int index, int count);public MemoryStream (byte[] buffer, int index, int count);new System.IO.MemoryStream : byte[] * int * int -> System.IO.MemoryStreamPublic Sub New (buffer As Byte(), index As Integer, count As Integer)Parameters
- buffer
- Byte[]
The array of unsigned bytes from which to create this stream.
- index
- Int32
The index into buffer at which the stream begins.
- count
- Int32
The length of the stream in bytes.
Exceptions
buffer is null.
index or count is less than zero.
The buffer length minus index is less than count.
Remarks
The CanRead, CanSeek, and CanWrite properties are all set to true, but the capacity cannot be changed. Capacity is set to count.
The length of the stream cannot be set to a value greater than the initial length of the specified byte array; however, the stream can be truncated (see SetLength).
This constructor does not expose the underlying stream. GetBuffer throws UnauthorizedAccessException. However, you can write to the stream.
See also
Applies to
MemoryStream(Byte[], Int32, Int32, Boolean)
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
Initializes a new non-resizable instance of the MemoryStream class based on the specified region of a byte array, with the CanWrite property set as specified.
public:
MemoryStream(cli::array <System::Byte> ^ buffer, int index, int count, bool writable);public MemoryStream (byte[] buffer, int index, int count, bool writable);new System.IO.MemoryStream : byte[] * int * int * bool -> System.IO.MemoryStreamPublic Sub New (buffer As Byte(), index As Integer, count As Integer, writable As Boolean)Parameters
- buffer
- Byte[]
The array of unsigned bytes from which to create this stream.
- index
- Int32
The index in buffer at which the stream begins.
- count
- Int32
The length of the stream in bytes.
- writable
- Boolean
The setting of the CanWrite property, which determines whether the stream supports writing.
Exceptions
buffer is null.
index or count are negative.
The buffer length minus index is less than count.
Remarks
The CanRead and CanSeek properties are both set to true. Capacity is set to count.
The length of the stream cannot be set to a value greater than the initial length of the specified byte array; however, the stream can be truncated (see SetLength).
This constructor does not expose the underlying stream. GetBuffer throws UnauthorizedAccessException. However, you can write to the stream if writable is true.
See also
Applies to
MemoryStream(Byte[], Int32, Int32, Boolean, Boolean)
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
- Source:
- MemoryStream.cs
Initializes a new instance of the MemoryStream class based on the specified region of a byte array, with the CanWrite property set as specified, and the ability to call GetBuffer() set as specified.
public:
MemoryStream(cli::array <System::Byte> ^ buffer, int index, int count, bool writable, bool publiclyVisible);public MemoryStream (byte[] buffer, int index, int count, bool writable, bool publiclyVisible);new System.IO.MemoryStream : byte[] * int * int * bool * bool -> System.IO.MemoryStreamPublic Sub New (buffer As Byte(), index As Integer, count As Integer, writable As Boolean, publiclyVisible As Boolean)Parameters
- buffer
- Byte[]
The array of unsigned bytes from which to create this stream.
- index
- Int32
The index into buffer at which the stream begins.
- count
- Int32
The length of the stream in bytes.
- writable
- Boolean
The setting of the CanWrite property, which determines whether the stream supports writing.
- publiclyVisible
- Boolean
true to enable GetBuffer(), which returns the unsigned byte array from which the stream was created; otherwise, false.
Exceptions
buffer is null.
index or count is negative.
The buffer length minus index is less than count.
Remarks
The CanRead and CanSeek properties are both set to true. Capacity is set to count.
The new stream instance can be written to, but the Capacity of the underlying byte array cannot be changed. The length of the stream cannot be set to a value greater than the initial length of the specified byte array; however, the stream can be truncated (see SetLength).
