通过

  • 项目

GetChars 方法

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

命名空间：  Microsoft.AnalysisServices.AdomdClient
程序集：  Microsoft.AnalysisServices.AdomdClient（在 Microsoft.AnalysisServices.AdomdClient.dll 中）

语法

声明
Public Function GetChars ( _
    ordinal As Integer, _
    dataIndex As Long, _
    buffer As Char(), _
    bufferIndex As Integer, _
    length As Integer _
) As Long
用法
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

参数

  • dataIndex
    类型：System. . :: . .Int64
    The zero-based index within the column from which to begin reading data.
  • buffer
    类型：array<System. . :: . .Char> [] () [] []
    The buffer into which to read the stream of characters.
  • bufferIndex
    类型：System. . :: . .Int32
    The zero-based index within the buffer from which to begin writing data.

返回值

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

实现

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

异常

异常 条件
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.

注释

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 null Nothing nullptr unit null 引用（在 Visual Basic 中为 Nothing） 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.