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How to Filter GridView Records with Dropdownlist Selection

How to Filter GridView Records with Dropdownlist Selection

In this tutorial i will explain you, How to Filter GridView Records with Dropdownlist Selection.

Design View:-

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    </head>
    <body>
    <form id="form1" runat="server">
    <div>
    <table align="center">
    <tr style="background-color:Green;color:White">
    <td>Dept No</td><td>Name</td><td>Location</td>
    </tr>
    <tr style="background-color:Green;color:White">
    <td>Filter By Location</td><td colspan="2"> 
    <asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="Loc" DataValueField="Loc" AutoPostBack="true" AppendDataBoundItems="true"
            onselectedindexchanged="DropDownList1_SelectedIndexChanged">
      <asp:ListItem Text="All" Value="All"></asp:ListItem>
      </asp:DropDownList>
    <asp:SqlDataSource ID="Loc" runat="server" ConnectionString="<%$ConnectionStrings:conn %>" SelectCommand="Select Distinct Loc from dept"></asp:SqlDataSource>
    </td>
    </tr>
    <tr>
    <td colspan="3">
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" ShowHeader="false">
     <Columns>
     <asp:BoundField DataField="deptno" HeaderText="dept no" ItemStyle-Width="120px" />
     <asp:BoundField DataField="dname" HeaderText="dept name" ItemStyle-Width="120px"/>    
     <asp:BoundField DataField="Loc" HeaderText="location" ItemStyle-Width="120px"/>
     </Columns>
    </asp:GridView>
    </td>
    </tr>
    </table>
    </div>
    </form>
    </body>
</html>

Code View:-

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        binddata();
    }
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        string strcon = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
        SqlConnection con = new SqlConnection(strcon);
        con.Open();
        if (DropDownList1.SelectedItem.Text == "All")
        {
            string strquery = "select * from dept";
            SqlCommand cmd = new SqlCommand(strquery, con);
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            da.Fill(ds);
            GridView1.DataSource = ds;
            GridView1.DataBind();
            con.Close();
        }
        else
        {
            string strquery = "select * from dept where loc='" + DropDownList1.SelectedItem.Text + "'";
            SqlCommand cmd = new SqlCommand(strquery, con);
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            da.Fill(ds);
            GridView1.DataSource = ds;
            GridView1.DataBind();
            con.Close();
        }
        
    }

    public void binddata()
    {
        string strcon = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
        SqlConnection con = new SqlConnection(strcon);
        con.Open();
        string strquery = "select deptno,dname,loc from dept";
        SqlCommand cmd = new SqlCommand(strquery, con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        GridView1.DataSource = ds;
        GridView1.DataBind();
        con.Close();
    }
}



Enjoy…..

One reply on “How to Filter GridView Records with Dropdownlist Selection”

I was just searching for this info for some time. After six hours of continuous Googleing, at last I got it in your site. I wonder what is the lack of Google strategy that do not rank this kind of informative sites in top of the list. Generally the top sites are full of garbage.

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