Článek
10/01/2010

AdomdDataReader.GetChars Method

Returns an array of Char objects that contain a stream of values from the specified column.

Namespace: Microsoft.AnalysisServices.AdomdClient
Assembly: Microsoft.AnalysisServices.AdomdClient (in Microsoft.AnalysisServices.AdomdClient.dll)

Syntax

'Declaration
Public Function GetChars ( _
    ordinal As Integer, _
    dataIndex As Long, _
    buffer As Char(), _
    bufferIndex As Integer, _
    length As Integer _
) As Long
'Usage
Dim instance As AdomdDataReader
Dim ordinal As Integer
Dim dataIndex As Long
Dim buffer As Char()
Dim bufferIndex As Integer
Dim length As Integer
Dim returnValue As Long

returnValue = instance.GetChars(ordinal, _
    dataIndex, buffer, bufferIndex, length)

public long GetChars(
    int ordinal,
    long dataIndex,
    char[] buffer,
    int bufferIndex,
    int length
)

public:
virtual long long GetChars(
    int ordinal, 
    long long dataIndex, 
    array<wchar_t>^ buffer, 
    int bufferIndex, 
    int length
) sealed

abstract GetChars : 
        ordinal:int * 
        dataIndex:int64 * 
        buffer:char[] * 
        bufferIndex:int * 
        length:int -> int64 
override GetChars : 
        ordinal:int * 
        dataIndex:int64 * 
        buffer:char[] * 
        bufferIndex:int * 
        length:int -> int64

public final function GetChars(
    ordinal : int, 
    dataIndex : long, 
    buffer : char[], 
    bufferIndex : int, 
    length : int
) : long

Parameters

ordinal
Type: System.Int32
The zero-based ordinal position of the column to be retrieved.

dataIndex
Type: System.Int64
The zero-based index within the column from which to begin reading data.

buffer
Type: array<System.Char[]
The buffer into which to read the stream of characters.

bufferIndex
Type: System.Int32
The zero-based index within the buffer from which to begin writing data.

length
Type: System.Int32
The number of characters to read from the column.

Return Value

Type: System.Int64
A Long that contains the number of characters actually read from the column.

Implements

IDataRecord.GetChars(Int32, Int64, array<Char[], Int32, Int32)

Exceptions

Exception	Condition
System.IndexOutOfRangeException	The value ofdataIndex is greater than Int32.MaxValue. The value of bufferIndex is less than 0 or greater than the total of length and the length of buffer.

System.IndexOutOfRangeException

The value ofdataIndex is greater than Int32.MaxValue.

The value of bufferIndex is less than 0 or greater than the total of length and the length of buffer.

Remarks

The GetChars method 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.

If you pass a nulla null reference (Nothing in Visual Basic) reference (Nothing in Visual Basic) in the buffer parameter, GetBytes returns the length of the column in characters.

No conversions are performed; therefore the data retrieved must already be a character array.

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