The DataView provides different views of the data stored in a DataTable. That is we can customize the views of data from a DataTable. Changes made to a DataView affect the underlying DataTable automatically, and changes made to the underlying DataTable automatically affect any DataView objects that are viewing that DataTable. Note that if you create a DataView using the constructor that does not take any arguments, you will not be able to use the DataView until you have set the Table property.
A DataView enables you to create different views of the data stored in a DataTable, a capability that is often used in data-binding applications. We can create a new DataTable from the DataView . We can use the ToTable method to copy all the rows and columns, or a subset of the data into a new DataTable .
using System;
using System.Data;
using System.Data.SqlClient;
using System.Windows.Forms;
namespace WindowsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string connetionString = null;
SqlConnection connection ;
SqlCommand command ;
SqlDataAdapter adapter = new SqlDataAdapter();
DataSet ds = new DataSet();
DataView dv ;
string sql = null;
connetionString = "Data Source=ServerName;Initial Catalog=DatabaseName;User ID=UserName;Password=Password";
sql = "Select * from product";
connection = new SqlConnection(connetionString);
try
{
connection.Open();
command = new SqlCommand(sql, connection);
adapter.SelectCommand = command;
adapter.Fill(ds, "Copy to DataTable");
adapter.Dispose();
command.Dispose();
connection.Close();
dv = new DataView(ds.Tables[0], "Product_Price <= 2000", "Product_ID", DataViewRowState.CurrentRows);
DataTable dTable ;
dTable = dv.ToTable();
dataGridView1.DataSource = dTable;
}
catch (Exception ex)
{
MessageBox.Show (ex.ToString());
}
}
}
}