SqlDataRecord.GetBytes(Int32, Int64, Byte[], Int32, Int32) Method
Definition
Important
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Gets the value for the column specified by the ordinal as an array of Byte objects.
public:
virtual long GetBytes(int ordinal, long fieldOffset, cli::array <System::Byte> ^ buffer, int bufferOffset, int length);public virtual long GetBytes (int ordinal, long fieldOffset, byte[] buffer, int bufferOffset, int length);abstract member GetBytes : int * int64 * byte[] * int * int -> int64
override this.GetBytes : int * int64 * byte[] * int * int -> int64Public Overridable Function GetBytes (ordinal As Integer, fieldOffset As Long, buffer As Byte(), bufferOffset As Integer, length As Integer) As LongParameters
- ordinal
- Int32
The zero-based ordinal of the column.
- fieldOffset
- Int64
The offset into the field value to start retrieving bytes.
- buffer
- Byte[]
The target buffer to which to copy bytes.
- bufferOffset
- Int32
The offset into the buffer to which to start copying bytes.
- length
- Int32
The number of bytes to copy to the buffer.
Returns
The number of bytes copied.
Implements
Exceptions
The ordinal is less than 0 or greater than the number of columns (that is, FieldCount).
The column specified by ordinal is null.
There is a type mismatch.
Remarks
This method enables you to obtain a binary value either in a single call or in chunks. Getting the value in chunks is useful for large values or values of unknown size.
To obtain the value in several chunks, allocate a byte array of the chunk-size and call GetBytes repeatedly, adjusting the fieldOffset parameter accordingly in each call.