Autocomplete in Ajax not working? - asp.net

Question

In Ajax, i am using autocompleteExender in my asp.net application, i write the service for that, when i run that service it is working fine, when i place autocompleteextender in asp.net page and assign properity for ajax autocompleteextender it is not working. this is my code service:
[WebMethod]
public string[] GetCompletionList(string prefixText)
{
SqlConnection con=new SqlConnection
("server=******;database=Mydb;user id=***;password=****;");
string sql = "Select productname from F_Product
Where productname like '" + prefixText + "%'";
SqlDataAdapter da = new SqlDataAdapter(sql, con);
try
{
DataTable dt = new DataTable();
da.Fill(dt);
string[] items = new string[dt.Rows.Count];
int i = 0;
foreach (DataRow dr in dt.Rows)
{
items.SetValue(dr[0].ToString(), i);
i++;
}
return items;
}
catch
{
return null;
}
finally
{
con.Close();
}
and this is my ajax autocompleteextender code.
<asp:AutoCompleteExtender ID="AutoCompleteExtender1" MinimumPrefixLength="2"
TargetControlID ="TextBox1" ServiceMethod="GetCompletionList"
ServicePath="~/Autocomplete.asmx"
runat="server">
</asp:AutoCompleteExtender>
<asp:TextBox ID="TextBox1" runat="server"
Width="213px"></asp:TextBox>

Answer 1

Try this out.
[WebMethod]
public string[] GetCompletionList(string prefixText)
{
string sql = "Select productname from F_Product Where productname like #prefixText ";
SqlDataAdapter da = new SqlDataAdapter(sql, System.Configuration.ConfigurationManager.ConnectionStrings["dbConnectionString"].ConnectionString);
da.SelectCommand.Parameters.Add("#prefixText", SqlDbType.VarChar, 50).Value = prefixText + "%";
DataTable dt = new DataTable();
da.Fill(dt);
string[] items = new string[dt.Rows.Count];
int i = 0;
foreach (DataRow dr in dt.Rows)
{
items.SetValue(dr["productname"].ToString(), i);
i++;
}
return items;
}
If you find it useful, please mark it as your answer else let me know...

Answer 2

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Web.Script.Services;
namespace YourProject
{
/// <summary>
/// Summary description for WebService
/// </summary>
// [ScriptService]
//[System.Web.Script.Services.ScriptService()]
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
[System.Web.Script.Services.ScriptService]
public class WebService : System.Web.Services.WebService
{
protected void Page_Load(object sender, EventArgs e)
{
}
[WebMethod]
public string HelloWorld()
{
return "Hello World";
}
[WebMethod]
public string[] GetCompletionList(string prefixText)
{
string sql = "Select productname from F_Product Where productname like #prefixText ";
SqlDataAdapter da = new SqlDataAdapter(sql, System.Configuration.ConfigurationManager.ConnectionStrings["dbConnectionString"].ConnectionString);
da.SelectCommand.Parameters.Add("#prefixText", SqlDbType.VarChar, 50).Value = prefixText + "%";
DataTable dt = new DataTable();
da.Fill(dt);
string[] items = new string[dt.Rows.Count];
int i = 0;
foreach (DataRow dr in dt.Rows)
{
items.SetValue(dr["productname"].ToString(), i);
i++;
}
return items;
}
}
}
If you find it useful, please mark it your answer else let me know...