DbData 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: virtual long GetChars(int ordinal, long dataIndex, cli::array <char> ^ buffer, int bufferIndex, int length);
public long GetChars (int ordinal, long dataIndex, char buffer, int bufferIndex, int length);
override this.GetChars : int * int64 * char * int * int -> int64
Public Function GetChars (ordinal As Integer, dataIndex As Long, buffer As Char(), bufferIndex As Integer, length As Integer) As Long
The zero-based column ordinal.
The index within the row from which to start the read operation.
The buffer into which to copy data.
The index within the
buffer where the write operation is to start.
The number of characters to read.
The actual number of characters read.
GetChars returns the number of available characters in the field. Most of the time 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, when the OleDbDataReader is reading a large data structure into a buffer. For more information, see the
SequentialAccess setting for CommandBehavior.
If you pass a buffer that is
null, GetChars returns the length of the field in characters.
No conversions are performed; therefore, the data retrieved must already be a character array.