How to Filter a DataView

DataView enables you to create different views of the data stored in a DataTable. That is we can customize the views of data from a DataTable. DataView can be used to sort, filter, and search a DataTable , additionally we can add new rows and modify the content in a DataTable . We can create DataView in two ways. Either we can use the DataView constructor, or we can create a reference to the DefaultView property of the DataTable. Also we can create multiple DataViews for any given DataTable.

The following C# source code creates a view that shows all Product Details where the Product Price less than 3000. Create a new C# project and drag a DataGridView and a Button on default Form Form1 , and copy and paste the following C# Source Code on button click event.

Full Source C#
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, "Filter DataView"); adapter.Dispose(); command.Dispose(); connection.Close(); dv = new DataView(ds.Tables[0], "Product_Price < = 3000", "Product_Name", DataViewRowState.CurrentRows); dataGridView1.DataSource = dv; } catch (Exception ex) { MessageBox.Show (ex.ToString()); } } } }