AJAX Control

Question

Hi Guys I am developing a web application in ASP.net. I have a relationship DropDownList and a textbox which is disable. I want that textbox enable when user select other in DropDownList using AJAX controls(Without refreshing the whole page). Help me on this topic. Regards Zuber Kazi

Zuber Kazi · Answer

Thank you Satyapriya but I am not getting how to add this in my project. Will you plz help me

Satyapriya Nayak · Answer

Hi Zuber Try this... Untitled Page ForeColor=Red Width=100px> AppendDataBoundItems=true runat=server Height=20px Width=156px onselectedindexchanged=DropDownList1_SelectedIndexChanged Font-Bold=True ForeColor=#FF9900> using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Data.SqlClient; namespace Ajax_dropdown { public partial class _Default : System.Web.UI.Page { string strConnString = ConfigurationManager.ConnectionStrings[ConnectionString].ConnectionString; string str; SqlCommand com; protected void Page_Load(object sender EventArgs e) { SqlConnection con = new SqlConnection(strConnString); if (!IsPostBack) { DropDownList1.Items.Add(Choose City); con.Open(); str = select * from area ; com = new SqlCommand(str con); SqlDataReader reader = com.ExecuteReader(); while (reader.Read()) { DropDownList1.Items.Add(reader[city].ToString()); } reader.Close(); con.Close(); } TextBox1.Text = ; TextBox1.Enabled = false; } protected void DropDownList1_SelectedIndexChanged(object sender EventArgs e) { TextBox1.Enabled = true; SqlConnection con = new SqlConnection(strConnString); con.Open(); str = select * from area where city=' + DropDownList1.SelectedValue + '; com = new SqlCommand(str con); SqlDataReader reader = com.ExecuteReader(); while (reader.Read()) { TextBox1.Text = reader[stdcode].ToString(); } reader.Close(); con.Close(); } } } Thanks If this post helps you mark it as answer