UniDataAdapter Class

In This Topic

Represents a set of data commands and a database connection that are used to fill the System.Data.DataSet and update a database.

Syntax

Visual Basic
C#

'Declaration
 
Public Class UniDataAdapter 
   Inherits Devart.Common.DbDataAdapter
   Implements System.ComponentModel.IComponent, System.Data.IDataAdapter, System.Data.IDbDataAdapter, System.ICloneable, System.IDisposable

public class UniDataAdapter : Devart.Common.DbDataAdapter, System.ComponentModel.IComponent, System.Data.IDataAdapter, System.Data.IDbDataAdapter, System.ICloneable, System.IDisposable

Remarks

The UniDataAdapter serves as a bridge between a System.Data.DataSet and database for retrieving and saving data. The UniDataAdapter provides this bridge by using System.Data.Common.DbDataAdapter.Fill to load data from the database into the System.Data.DataSet, and using System.Data.DataSet.Update() to send changes made in the System.Data.DataSet back to the database.

UniDataAdapter is used in conjunction with UniConnection and UniCommand to increase performance when connecting to a server.

The UniDataAdapter also includes the SelectCommand, InsertCommand, DeleteCommand, UpdateCommand, and TableMappings properties to facilitate loading and updating of data.

Example

The following example demonstrates how to retrieve and manipulate data using UniDataAdapter.

csharp

public void UseDataAdapter(UniConnection myConnection)
{
  UniDataAdapter myAdapter = new UniDataAdapter("SELECT DeptNo, DName FROM Test.Dept", myConnection);
  myAdapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
  DataSet myDataSet = new DataSet();
  myAdapter.Fill(myDataSet,"Departments");
  object[] rowVals = new object[2];
  rowVals[0] = 40;
  rowVals[1] = "Operations";
  myDataSet.Tables["Departments"].Rows.Add(rowVals);
  myAdapter.InsertCommand = new UniCommand("INSERT INTO Test.Dept (DeptNo, DName) " +
    "VALUES (:DeptNo, :DName)", myConnection);
  myAdapter.InsertCommand.Parameters.Add("DeptNo", UniDbType.Int, 0, "DeptNo");
  myAdapter.InsertCommand.Parameters.Add("DName", UniDbType.VarChar, 15, "DName");
  myAdapter.Update(myDataSet,"Departments"); 
  //Get all data from all tables within the dataset
  foreach(DataTable myTable in myDataSet.Tables)
  {
    foreach(DataRow myRow in myTable.Rows)
    {
      foreach (DataColumn myColumn in myTable.Columns)
      {
        Console.Write(myRow[myColumn]+"\t");
      }
      Console.WriteLine();
    }
    Console.WriteLine();
  }
}

Visual Basic

Public Sub UseDataAdapter(ByVal myConnection As UniConnection)
  Dim myAdapter As UniDataAdapter = New UniDataAdapter("SELECT DeptNo, DName FROM Test.Dept", myConnection)
  myAdapter.MissingSchemaAction = MissingSchemaAction.AddWithKey
  Dim myDataSet As DataSet = New DataSet
  myAdapter.Fill(myDataSet, "Departments")
  Dim rowVals(1) As Object
  rowVals(0) = "40"
  rowVals(1) = "Operations"
  myDataSet.Tables("Departments").Rows.Add(rowVals)
  myAdapter.InsertCommand = New UniCommand("INSERT INTO Test.Dept (DeptNo, DName) " & _
      "VALUES (:DeptNo, :DName)", myConnection)
  myAdapter.InsertCommand.Parameters.Add("DeptNo", UniDbType.Int, 0, "DeptNo")
  myAdapter.InsertCommand.Parameters.Add("DName", UniDbType.VarChar, 15, "DName")
  myAdapter.Update(myDataSet, "Departments")
  Dim myTable As DataTable
  Dim myRow As DataRow
  Dim myColumn As DataColumn
  ' Get all data from all tables within the dataset
  For Each myTable In myDataSet.Tables
    For Each myRow In myTable.Rows
      For Each myColumn In myTable.Columns
        Console.Write(myRow(myColumn) & Chr(9))
      Next myColumn
      Console.WriteLine()
    Next myRow
    Console.WriteLine()
  Next myTable
End Sub

Inheritance Hierarchy

System.Object
   System.MarshalByRefObject
      System.ComponentModel.Component
         System.Data.Common.DataAdapter
            System.Data.Common.DbDataAdapter
               Devart.Common.DbDataAdapter
                  Devart.Data.Universal.UniDataAdapter

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

UniDataAdapter Members
Devart.Data.Universal Namespace
UniConnection Class
UniCommand Class

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