Data Reader. Get Chars(Int32, Int64, Char, Int32, Int32) Method
Reads a stream of characters from the specified column offset into the buffer as an array, starting at the given buffer offset.
public: override long GetChars(int i, long fieldOffset, cli::array <char> ^ buffer2, int bufferoffset, int length);
public override long GetChars (int i, long fieldOffset, char buffer2, int bufferoffset, int length);
override this.GetChars : int * int64 * char * int * int -> int64
Public Overrides Function GetChars (i As Integer, fieldOffset As Long, buffer2 As Char(), bufferoffset As Integer, length As Integer) As Long
The zero-based column ordinal.
The index within the row where the read operation is to begin.
The buffer into which to copy data.
The index where
buffer2 is to begin the write operation.
The number of characters to read.
The actual number of characters read.
GetChars returns the number of available characters in the field. In most cases this is the exact length of the field. However, the number returned may be less than the true length of the field if
GetChars has already been used to obtain characters from the field. This may be the case, for example, if the OracleDataReader is reading a large data structure into a buffer. For more information, see the
SequentialAccess setting of CommandBehavior.
If you pass a buffer that is a null value. GetChars returns the length of the field in characters.