illustrates the use of a DataView object to filter and sort rows : DataView « Database ADO.net « C# / C Sharp

1. C# / C Sharp
2. Database ADO.net
3. DataView

illustrates the use of a DataView object to filter and sort rows

/*
Mastering Visual C# .NET
by Jason Price, Mike Gunderloy

Publisher: Sybex;
ISBN: 0782129110
*/

/*
  Example23_5.cs illustrates the use of a DataView object to
  filter and sort rows
*/

using System;
using System.Data;
using System.Data.SqlClient;

public class Example23_5
{

  public static void Main()
  {

    // formulate a string containing the details of the
    // database connection
    string connectionString =
      "server=localhost;database=Northwind;uid=sa;pwd=sa";

    // create a SqlConnection object to connect to the
    // database, passing the connection string to the constructor
    SqlConnection mySqlConnection =
      new SqlConnection(connectionString);

    // formulate a string containing a SELECT statement
    string selectString =
      "SELECT CustomerID, CompanyName, City, Country " +
      "FROM Customers";

    // create a SqlCommand object to hold the SELECT statement
    SqlCommand mySqlCommand = mySqlConnection.CreateCommand();

    // set the CommandText property of the SqlCommand object to
    // the SELECT string
    mySqlCommand.CommandText = selectString;

    // create a SqlDataAdapter object
    SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();

    // set the SelectCommand property of the SqlAdapter object
    // to the SqlCommand object
    mySqlDataAdapter.SelectCommand = mySqlCommand;

    // create a DataSet object to store the results of
    // the SELECT statement
    DataSet myDataSet = new DataSet();

    // open the database connection using the
    // Open() method of the SqlConnection object
    mySqlConnection.Open();

    // use the Fill() method of the SqlDataAdapter object to
    // retrieve the rows from the table, storing the rows locally
    // in a DataTable of the DataSet object
    Console.WriteLine("Retrieving rows from the Customers table");
    mySqlDataAdapter.Fill(myDataSet, "Customers");

    // create a DataView object
    DataView myDataView =
      new DataView(myDataSet.Tables["Customers"]);

    // set the RowFilter property of the DataView object
    myDataView.RowFilter = "Country = 'UK'";

    // set the Sort property of the DataView object
    myDataView.Sort = "CustomerID ASC";

    // display the rows in the DataView object
    foreach (DataRowView myDataRowView in myDataView)
    {
      for (int count = 0; count < myDataView.Table.Columns.Count; count++)
      {
        Console.WriteLine(myDataRowView[count]);
      }
    }

    // close the database connection using the Close() method
    // of the SqlConnection object
    mySqlConnection.Close();

  }

}


           
       

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