AdoDotNetDataReader Class

Artikel
02/28/2011

Provides an implementation of the DataReader class using an implementation of the ADO.NET IDataReader interface.

Inheritance Hierarchy

System.Object
Microsoft.VisualStudio.Data.DataReader
Microsoft.VisualStudio.Data.AdoDotNet.AdoDotNetDataReader

Namespace: Microsoft.VisualStudio.Data.AdoDotNet
Assembly: Microsoft.VisualStudio.Data (in Microsoft.VisualStudio.Data.dll)

Syntax

'Declaration
Public Class AdoDotNetDataReader _
    Inherits DataReader

public class AdoDotNetDataReader : DataReader

public ref class AdoDotNetDataReader : public DataReader

type AdoDotNetDataReader =  
    class
        inherit DataReader
    end

public class AdoDotNetDataReader extends DataReader

The AdoDotNetDataReader type exposes the following members.

Constructors

	Name	Description
	AdoDotNetDataReader(IDataReader)	Class constructor. Initializes a parameterized instance of the AdoDotNetDataReader class with an implementation of the IDataReader interface.
	AdoDotNetDataReader(IDataReader, IDbCommand, array<DataParameter[])	Class constructor. Initializes a parameterized instance of the AdoDotNetDataReader class with an implementation of the IDataReader interface and the command and/or parameters that produced the IDataReader.

Top

Properties

	Name	Description
	InnerDataReader	Retrieves the underlying IDataReader object that is driving the current data reader.
	IsClosed	Retrieves a Boolean value that indicates whether the specified data reader instance has been closed. (Overrides DataReader.IsClosed.)
	ItemCount	Retrieves the number of items in the current block of data. (Overrides DataReader.ItemCount.)
	Status	Retrieves a numerical status code returned by the method currently providing data to the data reader. (Overrides DataReader.Status.)

Top

Methods

	Name	Description
	Close	Closes the current IDataReader object instance. (Overrides DataReader.Close().)
	Dispose()	Releases managed resources held for the current DataReader instance. (Inherited from DataReader.)
	Dispose(Boolean)	Cleans up resources associated with the current DataReader instance, both when the public Dispose method is called and as well as when the object is finalized with a call to the Finalize method. (Inherited from DataReader.)
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Finalizes the current DataReader instance. (Inherited from DataReader.)
	GetBytes	Retrieves a specified number of bytes of binary data. (Overrides DataReader.GetBytes(Int32, array<Byte[], Int32, Int32).)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetItem(Int32)	Retrieves an object instance representing the retrievable item as determined by an index into the current block of data. (Overrides DataReader.GetItem(Int32).)
	GetItem(String)	Retrieves an object instance representing the retrievable item as specified by name. (Overrides DataReader.GetItem(String).)
	GetItemMaxLength	Retrieves the maximum length, in characters, of data items at the specified index. (Overrides DataReader.GetItemMaxLength(Int32).)
	GetItemName	Retrieves the name assigned to the data item at the specified index, if any. (Overrides DataReader.GetItemName(Int32).)
	GetItemType	Returns the data type of a data item, or items, at the specified index in a specified format. (Overrides DataReader.GetItemType(Int32, DataItemTypeFormat).)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsNullItem	Indicates whether the data item at the specified index is unspecified, that is, nulla null reference (Nothing in Visual Basic). (Overrides DataReader.IsNullItem(Int32).)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	NextResult	Advances the data reader to the next result in cases where the reader contains multiple results. (Overrides DataReader.NextResult().)
	Read	Advances the reader to the next block of data in cases where the reader contains more than one block. (Overrides DataReader.Read().)
	Terminate	Terminates the data reader immediately, without necessarily returning all of the data nor setting output parameters. (Overrides DataReader.Terminate().)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

Top

Remarks

This class provides an implementation based on the IDataReader interface of the DataReader class.

It is unlikely that a data provider will need to override or otherwise modify the behavior of this class; rather, they can simply instantiate it whenever they have an ADO.NET IDataReader and they need to return a DDEX DataReader

object.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Freigeben über