AdomdDataReader 类

Provides a means of reading a forward-only result set that is obtained by running a command, and can be used to access analytical data sources.

继承层次结构

System. . :: . .Object
  System. . :: . .MarshalByRefObject
    Microsoft.AnalysisServices.AdomdClient..::..AdomdDataReader

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

语法

声明
Public NotInheritable Class AdomdDataReader _
    Inherits MarshalByRefObject _
    Implements IDataReader, IDisposable, IDataRecord, IEnumerable
用法
Dim instance As AdomdDataReader
public sealed class AdomdDataReader : MarshalByRefObject, 
    IDataReader, IDisposable, IDataRecord, IEnumerable
public ref class AdomdDataReader sealed : public MarshalByRefObject, 
    IDataReader, IDisposable, IDataRecord, IEnumerable
[<SealedAttribute>]
type AdomdDataReader =  
    class
        inherit MarshalByRefObject
        interface IDataReader
        interface IDisposable
        interface IDataRecord
        interface IEnumerable
    end
public final class AdomdDataReader extends MarshalByRefObject implements IDataReader, IDisposable, IDataRecord, IEnumerable

AdomdDataReader 类型公开以下成员。

属性

  名称 说明
公共属性 Depth Gets a value indicating the depth of nesting for the current row.
公共属性 FieldCount Gets a value indicating the number of columns in the current row.
公共属性 IsClosed Gets a value indicating whether the data reader is closed.
公共属性 Item[ ( [ ( Int32] ) ] ) Gets the value of a specified column in its native format, given the ordinal position of the column. In Microsoft Visual C#, this property is the indexer for the AdomdDataReader class.
公共属性 Item[ ( [ ( String] ) ] ) Gets the value of a specified column in its native format, given the name of the column. In Microsoft Visual C#, this property is the indexer for the AdomdDataReader class.
公共属性 RecordsAffected This member is reserved for future use.

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方法

  名称 说明
公共方法 Close Closes the AdomdDataReader.
公共方法 CreateObjRef (从 MarshalByRefObject 继承。)
公共方法 Dispose Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
公共方法 Equals (从 Object 继承。)
受保护方法 Finalize (从 Object 继承。)
公共方法 GetBoolean Returns a Boolean that contains the value from the specified column.
公共方法 GetByte Returns a Byte that contains the value from the specified column.
公共方法 GetBytes This member is reserved for future use.
公共方法 GetChar Returns a Char that contains the value from the specified column.
公共方法 GetChars Returns an array of Char objects that contain a stream of values from the specified column.
公共方法 GetData Returns a System.Data.IDataReader interface to be used when a column points to more remote structured data.
公共方法 GetDataReader Gets an AdomdDataReader object from the specified column.
公共方法 GetDataTypeName Returns a String that contains the full name of the data type for the specified column.
公共方法 GetDateTime Returns a DateTime that contains the value from the specified column.
公共方法 GetDecimal Returns a Decimal that contains the value from the specified column.
公共方法 GetDouble Returns a Double that contains the value from the specified column.
公共方法 GetEnumerator Gets an IEnumerator interface for iterating through the collection.
公共方法 GetFieldType Returns a Type that represents the data type of the specified column.
公共方法 GetFloat Returns a Float that contains the value from the specified column.
公共方法 GetGuid Returns a Guid that contains the value from the specified column.
公共方法 GetHashCode (从 Object 继承。)
公共方法 GetInt16 Returns an Int16 that contains the value from the specified column.
公共方法 GetInt32 Returns an Int32 that contains the value from the specified column.
公共方法 GetInt64 Returns an Int64 that contains the value from the specified column.
公共方法 GetLifetimeService (从 MarshalByRefObject 继承。)
公共方法 GetName Returns the name of the specified column.
公共方法 GetOrdinal Returns the ordinal position of the specified column.
公共方法 GetSchemaTable Returns a DataTable that describes the column metadata of the AdomdDataReader.
公共方法 GetString Returns a String that contains the value from the specified column.
公共方法 GetTimeSpan Returns a TimeSpan that contains the value from the specified column.
公共方法 GetType (从 Object 继承。)
公共方法 GetValue Returns the value for the specified column in its native format.
公共方法 GetValues Gets an array of values for all of the columns in the current row.
公共方法 InitializeLifetimeService (从 MarshalByRefObject 继承。)
公共方法 IsDBNull Returns a Boolean that contains a value indicating whether the column is set to null.
受保护方法 MemberwiseClone() () () () (从 Object 继承。)
受保护方法 MemberwiseClone(Boolean) (从 MarshalByRefObject 继承。)
公共方法 NextResult This member is reserved for future use.
公共方法 Read Advances the AdomdDataReader to the next row.
公共方法 ToString (从 Object 继承。)

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显式接口实现

  名称 说明
显式接口实现私有方法 IEnumerable. . :: . .GetEnumerator

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注释

The AdomdDataReader class is the implementation of the [System.Data.IDataReader] interface for ADOMD.NET. All Microsoft .NET Framework data providers implement the [System.Data.IDataReader] interface as a way of quickly reading forward-only result sets.

To create an AdomdDataReader, you must call the ExecuteReader method of the AdomdCommand, rather than directly using a constructor.

While the AdomdDataReader is in use, the AdomdCommand and the associated AdomdConnection is busy serving the AdomdDataReader. While in this state, no operations can be performed on the AdomdConnection or AdomdCommand objects other than closing them. This remains the case until the Close or Dispose method of the AdomdDataReader is called. Changes made to a result set by another process or thread while data is being read may be visible to the user of the AdomdDataReader. However, the precise behavior is timing dependent.

IsClosed and RecordsAffected are the only properties that you can call after the AdomdDataReader is closed.

线程安全

此类型的任何公共 static(在 Visual Basic 中为 Shared) 成员都是线程安全的。不保证所有实例成员都是线程安全的。