DynamicsDataReader Class

In This Topic

Reads a forward-only stream of rows from Dynamics CRM.

Syntax

Visual Basic
C#

'Declaration
 
Public Class DynamicsDataReader 
   Inherits Devart.Data.SqlShimDataReader
   Implements System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IDisposable

public class DynamicsDataReader : Devart.Data.SqlShimDataReader, System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IDisposable

Remarks

To create a DynamicsDataReader, you must call the ExecuteReader method of the DynamicsCommand object, rather than directly using a constructor.

System.Data.Common.DbDataReader.IsClosed and RecordsAffected are the only properties that you can call after the DynamicsDataReader is closed. In some cases, you must call Close before you can call RecordsAffected.

Example

The following example creates a DynamicsConnection, a DynamicsCommand, and a DynamicsDataReader. The example reads through the data, writing it out to the console. Finally, the example closes the DynamicsDataReader, then the DynamicsConnection.

csharp

public void ReadMyData(string myConnString)  {
        DynamicsConnection dynamicsConnection = new DynamicsConnection(myConnString);
        DynamicsCommand dynamicsCommand = (DynamicsCommand)dynamicsConnection.CreateCommand();
        dynamicsCommand.CommandText = "SELECT contactid, firstname, lastname FROM contact";
        dynamicsConnection.Open();
        DynamicsDataReader dynamicsReader = dynamicsCommand.ExecuteReader();
        try {
                // Always call Read before accessing data.
                while (dynamicsReader.Read()) {
                Console.WriteLine(dynamicsReader.GetGuid(0).ToString() + " " + 
                dynamicsReader.GetString(1) + " " + dynamicsReader.GetString(2));
        }
        }
        finally {
                // always call Close when done reading.
                dynamicsReader.Close();

                // Close the connection when done with it.
                dynamicsConnection.Close();
        }
}

Visual Basic

Public Sub ReadMyData(ByVal myConnString As String)
        Dim dynamicsConnection As New DynamicsConnection(myConnString)
        Dim dynamicsCommand As DynamicsCommand = dynamicsConnection.CreateCommand()
                dynamicsCommand.CommandText = "SELECT contactid, firstname, lastname FROM contact"
        dynamicsConnection.Open()
        Dim dynamicsReader As DynamicsDataReader = dynamicsCommand.ExecuteReader()
        Try
                ' Always call Read before accessing data.
                While dynamicsReader.Read()
                        Console.WriteLine(String.Concat(dynamicsReader.GetGuid(0).ToString(), " ", _
                        dynamicsReader.GetString(1), " ", dynamicsReader.GetString(2)))
                End While
        Finally
                ' always call Close when done reading.
                dynamicsReader.Close()

                        ' Close the connection when done with it.
                        dynamicsConnection.Close()
        End Try
End Sub

Inheritance Hierarchy

System.Object
   System.MarshalByRefObject
      System.Data.Common.DbDataReader
         Devart.Common.DbDataReaderBase
            Devart.Data.SqlShimDataReader
               Devart.Data.Dynamics.DynamicsDataReader

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DynamicsDataReader Members
Devart.Data.Dynamics Namespace
DynamicsConnection Class
DynamicsCommand Class

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