Binding to WCF service

RadAutoCompleteBox supports WCF binding. The steps below show how to load items from WCF service. It also shows how to use the context object to pass information from the client to the OperationContract.

JavaScript

<script type="text/javascript">
	function requesting(sender, eventArgs) {
		var context = eventArgs.get_context();
		//Data passed to the service.
		context["ClientData"] = "ClientData_Passed_To_The_Service";
	}
</script>

The path to the Web service and the name of the service method are specified in the WebServiceSettings' Path and Method properties:

ASPNET

<telerik:RadAutoCompleteBox RenderMode="Lightweight" runat="server" ID="RadAutoCompleteBox2" OnClientRequesting="requesting">
	<WebServiceSettings Path="LoadEntriesWCF.svc" Method="GetCompanyNames" />
</telerik:RadAutoCompleteBox>

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

C#

[OperationContract]
public AutoCompleteBoxData GetCompanyNames(RadAutoCompleteContext context)
{
	//Accesses the additional data sent from the client.
	string clientData = context["ClientData"].ToString();

	string sql = "SELECT  * from Customers WHERE CompanyName LIKE '" + context.Text + "%'";
	SqlDataAdapter adapter = new SqlDataAdapter(sql,
		ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);
	DataTable data = new DataTable();
	adapter.Fill(data);
	List<AutoCompleteBoxItemData> result = new List<AutoCompleteBoxItemData>();
	AutoCompleteBoxData  dropDownData = new AutoCompleteBoxData();

	result = new List<AutoCompleteBoxItemData>();

	for (int i = 0; i < data.Rows.Count; i++)
	{
		AutoCompleteBoxItemData  itemData = new AutoCompleteBoxItemData();
		itemData.Text = data.Rows[i]["CompanyName"].ToString();
		itemData.Value = data.Rows[i]["CustomerID"].ToString();

		result.Add(itemData);
	}

	dropDownData.Items = result.ToArray();
	return dropDownData;
}

VB.NET

<OperationContract()>
Public Function GetCompanyNames(context As RadAutoCompleteContext) As AutoCompleteBoxData
	'Accesses the additional data sent from the client.
	Dim clientData As String = context("ClientData").ToString()

	Dim sql As String = "SELECT  * from Customers WHERE CompanyName LIKE '" + context.Text + "%'"
	Dim adapter As New SqlDataAdapter(sql, ConfigurationManager.ConnectionStrings("NorthwindConnectionString").ConnectionString)
	Dim data As New DataTable()
	adapter.Fill(data)
	Dim result As New List(Of AutoCompleteBoxItemData)()
	Dim dropDownData As New AutoCompleteBoxData()

	result = New List(Of AutoCompleteBoxItemData)()

	For i As Integer = 0 To data.Rows.Count - 1
		Dim itemData As New AutoCompleteBoxItemData()
		itemData.Text = data.Rows(i)("CompanyName").ToString()
		itemData.Value = data.Rows(i)("CustomerID").ToString()

		result.Add(itemData)
	Next

	dropDownData.Items = result.ToArray()
	Return dropDownData
End Function

See Also

• Overview