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Thursday, 11 December 2014

Add Select text in Dropdownlist in Asp.Net OR Adding Default Select Option in the DropDownList Using C#.Net in Asp.Net

12/11/2014 - By Pranav Singh 0



This article will show you how you can bind the value collection to dropdown list and add the “Select” value to the the dropdown in asp.net using c#.net. In this article I have use sql server to retrieve the data from the database.

Here is the sql table which we will bind with dropdownlist

 
So for this article first we will create a new asp.net application and add the below code into the .asp page.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="WebApplication1.WebForm2" %>

<!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>Add Select text in Dropdownlist in Asp.Net OR Adding Default Select Option in the DropDownList Using C#.Net in Asp.Net</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>   
        Country Name :<asp:DropDownList ID="DropDownList1" runat="server" Width="150px">
        </asp:DropDownList>   
    </div>
    </form>
</body>
</html>

Now add the below code into the .cs page for binding the dropdown list and assigning the default value.

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;

namespace WebApplication1
{
    public partial class WebForm2 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                BindDdl();
            }
        }
        private void BindDdl()
        {
            SqlConnection con = new SqlConnection("Data Source=SQLEXPRESS;Initial Catalog=Demo;Integrated Security=True");
            string queryValidate = "Select * from CountryName";
            DataTable objdt = new DataTable();
            SqlDataAdapter da = new SqlDataAdapter(queryValidate, con);
            da.Fill(objdt);
            if (objdt.Rows.Count > 0)
            {
                DropDownList1.DataSource = objdt;
                DropDownList1.DataTextField = "CountryName";
                DropDownList1.DataValueField = "Id";
                DropDownList1.DataBind();
                DropDownList1.Items.Insert(0, "Select Country");
            }
        }
    }
}

In above code I have shown how you can bind the dropdown list control using c#.net in asp.net. Just check the below code.

                DropDownList1.Items.Insert(0, "Select Country");

This piece of code is used for assigning the default value to the dropdown list control. Now we have done run the code and check the output.



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