how to display while selectind dropdowns value from that perticular tables column value and to display in textbox?

Question

hi everyone..
my table contains

ID	waName	waProID	Date	Allocater
6	11	DU/0005	3/15/2012	Administrator
7	11	DU/0006	3/28/2012	Administrator

and in my aspx page contains
dropdowns[ddlwaProID] if i select from this record in TextBox i want to display Allocater Name..

can any one suggest me?just want to display in Text Box..
wat i have to do..i have to create sp?or only query s enough?

thanks and regards..

Satyapriya Nayak · Answer

Hi fahad Untitled Page onselectedindexchanged=DropDownList1_SelectedIndexChanged> 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 { 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) { DropDownList1.AutoPostBack = true; SqlConnection con = new SqlConnection(strConnString); if (!IsPostBack) { DropDownList1.Items.Add(Choose waProID); con.Open(); str = select * from test; com = new SqlCommand(str con); SqlDataReader reader = com.ExecuteReader(); while (reader.Read()) { DropDownList1.Items.Add(reader[waProID].ToString()); } reader.Close(); con.Close(); } } protected void DropDownList1_SelectedIndexChanged(object sender EventArgs e) { SqlConnection con = new SqlConnection(strConnString); con.Open(); str = select * from test where waProID=' + DropDownList1.SelectedItem.Text + '; com = new SqlCommand(str con); SqlDataReader reader = com.ExecuteReader(); while (reader.Read()) { TextBox1.Text = reader[Allocater].ToString(); } reader.Close(); con.Close(); } } } Thanks

Suthish Nair · Answer

Satyapriya Nayak Always use parameterized queries.

fahad sheikhji · Answer

thanks dude.

fahad sheikhji · Answer

thanks meera where should i place this in aspx.cs..in page load??

Meera Mohiddin · Answer

Hi Just simple query is enough. Try this one. in code behind: int l_iValue=convert.toint32(dropdownlist1.selectedvalue.tostring()) dataset l_ds=new dataset(); sqlconnection con=new sqlconnection(); sqldataadapter da=new sqldataadapter(select allocater from tablename where id=+l_ivalue) da.fill(ds); if(ds.tables[0].rows.count>0) { textbox1.text=ds.tables[0].rows[0][columnname].tostring(); }