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DataReader Class

Provides the ability to expose data from any data.

Inheritance Hierarchy


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


Public MustInherit Class DataReader _
    Implements IDisposable
public abstract class DataReader : IDisposable
public ref class DataReader abstract : IDisposable
type DataReader =  
        interface IDisposable
public abstract class DataReader implements IDisposable

The DataReader type exposes the following members.


  Name Description
Protected method DataReader Class constructor. Instantiates a nonparameterized instance of the DataReader class.



  Name Description
Public property IsClosed Retrieves a Boolean value that indicates whether the specified reader has been closed.
Public property ItemCount Retrieves the number of items in the current block of data.
Public property Status Retrieves a numerical status code returned by the method currently providing data to the data reader.



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



All base-level data retrieval mechanisms return a 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.

See Also


Microsoft.VisualStudio.Data Namespace