DbDataTable Class

In This Topic

The DbDataTable class represents a single object that provides all of the functionality needed to retrieve and manipulate data from a data source. The DbDataTable class is built using existing ADO.NET components.

Syntax

Visual Basic
C#

'Declaration
 
Public MustInherit Class DbDataTable 
   Inherits System.Data.DataTable
   Implements System.ComponentModel.IComponent, System.ComponentModel.IListSource, System.ComponentModel.ISupportInitialize, System.ComponentModel.ISupportInitializeNotification, System.IDisposable, System.IServiceProvider, System.Runtime.Serialization.ISerializable, System.Xml.Serialization.IXmlSerializable

public abstract class DbDataTable : System.Data.DataTable, System.ComponentModel.IComponent, System.ComponentModel.IListSource, System.ComponentModel.ISupportInitialize, System.ComponentModel.ISupportInitializeNotification, System.IDisposable, System.IServiceProvider, System.Runtime.Serialization.ISerializable, System.Xml.Serialization.IXmlSerializable

Remarks

The DbDataTable class extends the System.Data.DataTable class to provide a single object that can be used to access and update data from a data source. When a DbDataTable is created, the default values of its constituent parts are set to reasonable defaults, meaning that the programmer can create a single object and immediately use it to retrieve and manipulate data from a data source. It allows to cut down the size of the written code.

The DbDataTable class is designed to employ both connected and disconnected data access models. It also provides functionality for asynchronous fill operations.

The DbDataTable class can be fully adjusted at design-time. You may retrieve data at design-time from a data source if you set Active property to true.

For more information on advanced features of DbDataTable please refer to topic DataTable Advanced Features.

Example

This sample shows how to use DbDataTable. The routine accepts DbTable-compatible object and IDbConnection implementor object as parameters. After SQL query text has been set, the data is retrieved from the table.

csharp

static void UseDataTable(DbDataTable myDataTable, IDbConnection myConnection)
{
  myDataTable.Connection = myConnection;
  myDataTable.SelectCommand = myConnection.CreateCommand();
  myDataTable.SelectCommand.CommandText = "SELECT * FROM Test.Dept";
  try
  {
    myDataTable.Fill();
    myDataTable.Rows[1].Delete();
    myDataTable.Update();
    foreach(DataRow myRow in myDataTable.Rows)
    {
      foreach(DataColumn myCol in myDataTable.Columns)
      {
        Console.Write(myRow[myCol] + "\t");
      }
      Console.WriteLine();
    }
  }
  finally
  {
    myDataTable.Clear();
  }
}

Visual Basic

Public Sub UseDataTable(ByVal myDataTable As DbDataTable, ByVal myConnection As IDbConnection)
  myDataTable.Connection = myConnection
  myDataTable.SelectCommand = myConnection.CreateCommand()
  myDataTable.SelectCommand.CommandText = "SELECT * FROM Test.Dept"
  Try
    myDataTable.Fill()
    myDataTable.Rows(1).Delete()
    myDataTable.Update()
    Dim myRow As DataRow
    Dim myCol As DataColumn
    For Each myRow In myDataTable.Rows
      For Each myCol In myDataTable.Columns
        Console.Write(myRow(myCol) & Chr(9))
      Next myCol
      Console.WriteLine()
    Next myRow
  Finally
    myDataTable.Clear()
  End Try
End Sub

Inheritance Hierarchy

System.Object
   System.ComponentModel.MarshalByValueComponent
      System.Data.DataTable
         Devart.Common.DbDataTable
            Devart.Data.SqlServer.SqlDataTable

Reference

DbDataTable Members
Devart.Common Namespace

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