Web Service Binding

RadSearchBox can be bound to Web service. The path to the Web service and the name of the service method are specified in the WebServiceSettings' Path and Method properties:

<telerik:RadSearchBox RenderMode="Lightweight" runat="server" ID="RadSearchBox1">
    <WebServiceSettings Method="GetItems" Path="WebService.asmx" />
</telerik:RadSearchBox>

To use the integrated support, the Web service should have the following signature:

        [WebMethod]
public SearchBoxData GetItems(SearchBoxContext context)
{
    DataTable data = GetData(context.Text);

    List<SearchBoxItemData> items = new List<SearchBoxItemData>();

    for (int i = 0; i < data.Rows.Count; i++)
    {
        SearchBoxItemData itemData = new SearchBoxItemData();
        itemData.Text = data.Rows[i]["ProductName"].ToString();
        itemData.Value = data.Rows[i]["ProductId"].ToString();

        items.Add(itemData);
    }

    SearchBoxData result = new SearchBoxData();
    result.Items = items.ToArray();
    return result;
}

private static DataTable GetData(string filterString)
{
    SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);
    SqlCommand command = new SqlCommand("SELECT [ProductId], [ProductName] FROM [Products] WHERE [ProductName] LIKE '%' + @filterString + '%' ORDER BY [ProductId]");
    command.Parameters.AddWithValue("@filterString", filterString);
    command.Connection = connection;
    SqlDataAdapter adapter = new SqlDataAdapter(command);

    DataTable data = new DataTable();
    adapter.Fill(data);
    return data;
}

<WebMethod> _
Public Function GetItems(context As SearchBoxContext) As SearchBoxItemData()
    Dim data As DataTable = GetData(context.Text)

    Dim result As New List(Of SearchBoxItemData)()

    For i As Integer = 0 To data.Rows.Count - 1
        Dim itemData As New SearchBoxItemData()
        itemData.Text = data.Rows(i)("ProductName").ToString()
        itemData.Value = data.Rows(i)("ProductId").ToString()

        result.Add(itemData)
    Next

    Return result.ToArray()
End Function

Private Shared Function GetData(filterString As String) As DataTable
    Dim connection As New SqlConnection(ConfigurationManager.ConnectionStrings("NorthwindConnectionString").ConnectionString)
    Dim command As New SqlCommand("SELECT [ProductId], [ProductName] FROM [Products] WHERE [ProductName] LIKE '%' + @filterString + '%' ORDER BY [ProductId]")
    command.Parameters.AddWithValue("@filterString", filterString)
    command.Connection = connection
    Dim adapter As New SqlDataAdapter(command)

    Dim data As New DataTable()
    adapter.Fill(data)
    Return data
End Function