How to Bind Data in DropDownList in ASP.Net with SqlDataSource

by Santhakumar Munuswamy

  Posted on  30 November 2014



Dropdownlist Control:

It is enables users to select from a single-selection drop-down list. The drop-down list contain "n" number of items. The DropDownList control also supports data binding, such as data to bind the control to a data source like object data source, xml data source and sql data source, that contains the items to display in the control. This DropDownList control can be used to add data manually or even dynamically data binding from database.

DataBind Method

It is method to bind the data source to the DropDownList control

DataTextField, DataValueField Property

To specify which field in the data source to bind to the Text and Value properties of each list item in the control.

SelectedIndex Property

The SelectedIndex property to programmatically determine the index of the item selected by the user from the DropDownList control


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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">

<html xmlns="" >
<head runat="server">
    <title> dropdownlist control</title>
    <form id="form1" runat="server">
    <td style="height: 45px"><asp:Label ID="Label1" runat="server" Style="left: -1px; position: relative; top: 0px"
            Text="Name:" Width="46px"></asp:Label></td>
     <td style="height: 45px"><asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="SqlDataSource1"
            DataTextField="EmpName" DataValueField="EmpName" Height="26px" Style="left: 3px;
            position: relative; top: 0px" Width="125px">
         <asp:ListItem> &lt;&lt; Select &gt;&gt;</asp:ListItem>
     <td style="height: 45px">
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:masterConnectionString %>"
            SelectCommand="SELECT [EmpName] FROM [tbl_employee_profile]"></asp:SqlDataSource></td>
        <asp:DropDownList ID="DropDownList" runat="server">

source from my old blog: Readmore


About the Author
Santhakumar Munuswamy is a seasoned Solution Architect and Most Valuable Professional in Cloud /AI solutions. He has been experienced around 14 years in Solution designing, Software Product Development, Technical Documentation, Project Management for Web and Cloud Applications. He has experience in the IT industry across different domains (Automotive, Telecommunications, Healthcare, Logistics & Warehouse Automation, etc.) with roles in Technical Architect, Genesys Consultant, Technical Lead, Team Lead, and Developer. He has experienced in mentorship and coaching high potential developers.

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