Net-informations.com
SiteMap  | About    

How to Sort a DataView

The DataView provides different views of the data stored in a DataTable. DataView can be used to sort, filter, and search data in a DataTable , additionally we can add new rows and modify the content in a DataTable. DataViews can be created and configured on both design time and run time . 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. More over a DataView provides a dynamic view of data in the underlying DataTable: the content, ordering, and membership reflect changes as they occur.

We can sort single or multiple fields in a DataView , also we can specify the sort order like ASC (ascending) and DESC (descending) . The following C# example creates a View and apply sort on the column Product_Price in descending order. 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.




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, "Sort DataView");
                adapter.Dispose();
                command.Dispose();
                connection.Close();

                dv = new DataView(ds.Tables[0], "Product_Price > 3000", "Product_Price Desc", DataViewRowState.CurrentRows);

                dataGridView1.DataSource = dv;
            }
            catch (Exception ex)
            {
                MessageBox.Show (ex.ToString());
            }
        }
    }
}




net-informations.com (C) 2016    Founded by raps mk
All Rights Reserved. All other trademarks are property of their respective owners.