OracleDataReader.GetChars Method (Int32, Int64, Char[], Int32, Int32)


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Reads a stream of characters from the specified column offset into the buffer as an array, starting at the given buffer offset.

Namespace:   System.Data.OracleClient
Assembly:  System.Data.OracleClient (in System.Data.OracleClient.dll)

override GetChars : 
        i:int *
        fieldOffset:int64 *
        buffer2:char[] *
        bufferoffset:int *
        length:int -> int64


Type: System.Int32

The zero-based column ordinal.

Type: System.Int64

The index within the row where the read operation is to begin.

Type: System.Char[]

The buffer into which to copy data.

Type: System.Int32

The index where buffer is to begin the write operation.

Type: System.Int32

The number of characters to read.

Return Value

Type: System.Int64

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.

.NET Framework
Available since 1.1
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