I want to use AutoCompleteExtender with textbox to auto complete user’s entry from mysql database.
but the problem when I run the code and enter a litter should call the webservice method but the problem that the service method return nothing here is my code so please advice me.
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" />
</div>
<div>
<asp:UpdatePanel id="UPSearch" runat="server">
<ContentTemplate>
<asp:Panel runat="server" style="position:absolute; top: 48px; left: 10px;">
<asp:TextBox ID="txtSearch" runat="server"
style="position:absolute; top: 17px; left: 235px;"></asp:TextBox>
<cc1:AutoCompleteExtender ID="ACE_txtSearch" runat="server" TargetControlID="txtSearch" ServiceMethod= "GetByLastName" ServicePath="SearchService.asmx" MinimumPrefixLength="1" >
</cc1:AutoCompleteExtender>
<asp:RadioButton ID="rdoLastName" runat="server"
style="position:absolute; top: 96px; left: 224px; width: 186px;"
Text="Search By Last Name"/>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
Web Service
namespace Imam_Contacts
{
[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 SearchService : System.Web.Services.WebService
{
[WebMethod]
public string[] GetByLastName(string prefixText)
{
int count = 10;
string sql = "Select * from contact_info Where Last_Name like @prefixText";
SqlDataAdapter da = new SqlDataAdapter(sql,"server=localhost;User Id=root;database=contacts;Persist Security Info=True");
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["Last_Name"].ToString(), i);
i++;
}
return items;
}
}
}
This answer is only relevant if you can’t find a better solution but I’d highly recommend using jQuery and one of the many autocomplete plugins it has available. It’s far more reliable and much more customizable.