WebService data source type enables you to connect WebCombo to a Web Service in elegant fashion, which is done through properties configuration without requiring you to write Javascript code.

This topic shows how to add new item to Web Service.

To add new item to WebService

Right-click on WebCombo control and select Properties.
Expand LayoutSettings and set AllowAddItem to True.
Create WebService.asmx in the same level with your aspx name.

Go to App_Code and add method GetEmployees and InsertEmployee in WebService.cs.

C#	Copy Code
[System.Web.Script.Services.ScriptService] [WebMethod] public QueryResult GetEmployees(DataSourceSelectArguments selectArguments) { NorthwindDataContext context = new NorthwindDataContext(); context.DeferredLoadingEnabled = false; context.ObjectTrackingEnabled = false; WebComboDataProvider<Employee> query = new WebComboDataProvider<Employee>(context.Employees); return query.Select(selectArguments); } [WebMethod]public TransactionResult InsertEmployee(Employee newObject) { NorthwindDataContext context = new NorthwindDataContext(); WebComboDataProvider<Employee> query = new WebComboDataProvider<Employee>(context.Employees); TransactionResult result = new TransactionResult(); // only add new item when the submitted firstname has not existed in our database if (context.Employees.Where(e => e.FirstName == newObject.FirstName).Count() == 0) { result = query.Insert(newObject); result.NewID = newObject.EmployeeID; result.AffectedResults = 1; } return result; }

Copy Code

[System.Web.Script.Services.ScriptService]
[WebMethod]
public QueryResult GetEmployees(DataSourceSelectArguments selectArguments)
{
   NorthwindDataContext context = new NorthwindDataContext();
   context.DeferredLoadingEnabled = false;
   context.ObjectTrackingEnabled = false;

   WebComboDataProvider<Employee> query = new WebComboDataProvider<Employee>(context.Employees);
   return query.Select(selectArguments);
}

[WebMethod]public TransactionResult InsertEmployee(Employee newObject)
{
   NorthwindDataContext context = new NorthwindDataContext();
   WebComboDataProvider<Employee> query = new WebComboDataProvider<Employee>(context.Employees);
   TransactionResult result = new TransactionResult();

   // only add new item when the submitted firstname has not existed in our database
   if (context.Employees.Where(e => e.FirstName == newObject.FirstName).Count() == 0)
   {
      result = query.Insert(newObject);
      result.NewID = newObject.EmployeeID;      result.AffectedResults = 1;   }

      return result;
}

Set the properties based on the table and code below.

Property	Value
BindingOperationMode	ClientBinding
DataSourceType	WebService
ServiceUrl	WebCombo_WebService.asmx (or any .asmx created by user)
ItemTypeName	Employee
SelectMethod	GetEmployees
InsertMethod	InsertEmployee

HTML	Copy Code
<ISWebCombo:WebCombo ID="WebCombo1" runat="server" DataTextField="FirstName" DataValueField="EmployeeID" Height="20px" UseDefaultStyle="True" Width="200px" BindingOperationMode="ClientBinding"> <LayoutSettings AllowAddItem="True"> </LayoutSettings> <ClientBindingSettings DataSourceType="WebService" ServiceUrl="WebCombo_WebService.asmx" ItemTypeName="Employee"> <ServiceMethods SelectMethod="GetEmployees" InsertMethod="InsertEmployee" /> </ClientBindingSettings> </ISWebCombo:WebCombo>

HTML

Copy Code

<ISWebCombo:WebCombo ID="WebCombo1" runat="server" DataTextField="FirstName" DataValueField="EmployeeID"
   Height="20px" UseDefaultStyle="True" Width="200px" BindingOperationMode="ClientBinding">
   <LayoutSettings AllowAddItem="True">   
   </LayoutSettings>
   <ClientBindingSettings DataSourceType="WebService" ServiceUrl="WebCombo_WebService.asmx" ItemTypeName="Employee">
      <ServiceMethods SelectMethod="GetEmployees" InsertMethod="InsertEmployee" />
   </ClientBindingSettings>
</ISWebCombo:WebCombo>

Run the project.

Intersoft WebCombo Documentation
How-to: Add New Item to Web Service
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To add new item to WebService

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