DataReader Class

Definition

Provides the ability to expose data from any data source.

public ref class DataReader abstract : IDisposable, Microsoft::VisualStudio::Data::Services::SupportEntities::IVsDataReader, Microsoft::VisualStudio::Data::Services::SupportEntities::IVsDataReaderDescriptor
public abstract class DataReader : IDisposable, Microsoft.VisualStudio.Data.Services.SupportEntities.IVsDataReader, Microsoft.VisualStudio.Data.Services.SupportEntities.IVsDataReaderDescriptor
type DataReader = class
    interface IVsDataReader
    interface IDisposable
    interface IVsDataReaderDescriptor
Public MustInherit Class DataReader
Implements IDisposable, IVsDataReader, IVsDataReaderDescriptor
Inheritance
DataReader
Derived
Implements

Constructors

DataReader()

Initializes a new instance of the DataReader class.

Properties

Descriptor

Gets information that describes the data from a data source.

HasDescriptor

Gets a value indicating whether the data reader exposes its IVsDataReaderDescriptor implementation through the Descriptor property.

IsClosed

Gets a Boolean value that indicates whether the specified reader has been closed.

ItemCount

Gets the number of items in the current block of data.

Status

Gets a numerical status code returned by the method currently providing data to the data reader.

Methods

Close()

Closes the DataReader instance.

Dispose()

Releases managed resources held for the current DataReader instance.

Dispose(Boolean)

Cleans up resources associated with the current DataReader instance, both when the public Dispose() method is called and when the object is finalized with a call to the Finalize() method.

Finalize()

Finalizes the current DataReader instance.

GetBytes(Int32, Byte[], Int32, Int32)

Retrieves a specified number of bytes of raw binary data.

GetBytes(String, Byte[], Int32, Int32)

Retrieves a specified number of bytes of raw binary data.

GetItem(Int32)

Retrieves the value of the item at the specified index in the current block of data.

GetItem(String)

Retrieves the value of a data item with the specified name in the current block of data.

GetItemIndex(String)

Returns the index corresponding to the specified item name in the block of data.

GetItemMaxLength(Int32)

Retrieves the maximum length, in characters, of data items at the specified index.

GetItemName(Int32)

Retrieves the name assigned to the data item at the specified index, if any.

GetItemType(Int32)

Retrieves the data type of a data item, or items, at the specified index for the default format Default.

GetItemType(Int32, DataItemTypeFormat)

Retrieves the data type of a data item, or items, at the specified index in a specified format.

IsNullItem(Int32)

Indicates whether the data item at the specified index is unspecified, that is, null.

IsNullItem(String)

Indicates whether the value of the given data item is unspecified, that is, null.

NextResult()

Advances the data reader to the next result set in cases where the reader contains multiple result sets.

Read()

Advances the reader to the next block of data in cases where the reader contains more than one block of data.

Terminate()

Terminates the data reader immediately, without necessarily returning all of the data or setting output parameters.

Applies to