Developing Business Logic using the WCF Service Library with VS2K8 and ASP.NET 3.5 - Understanding the WCF Client: ASP.NET 3.5 web site
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Once the service is up and running, we should have a client accessing the service. In this case, I would like to access the WCF service using ASP.NET 3.5. For this purpose, a project named "WFClientWebsite" (of type ASP.NET website) is added to the solution.
Once the web site is created, a service reference is added to http://localhost:8181/EmpService which is hosted by "NorthwindBLLServiceHost" (refer to Fig 1). Once the reference is added, a proxy gets created at ASP.NET and all of those classes are available to ObjectDataSource controls for data binding.
The following is an output screen shot which demonstrates the access to service using the ObjectDataSource control.
Understanding the WCF Client: ASP.NET 3.5 web page source code
The following is the source design (which use ObjectDataSource, FormView and GridView controls) for the above web page:
<body>
<form id="form1" runat="server"> <div>
<asp:DropDownList ID="ddlEmpLookup" runat="server"
AutoPostBack="True" DataSourceID="odsrcEmpLookup" DataTextField="ename"
DataValueField="empno"> </asp:DropDownList>
<asp:Button ID="btnEdit" runat="server" Text="Edit" /> <asp:Button ID="btnAddNew" runat="server" Text="Add New" /> <asp:ObjectDataSource ID="odsrcEmpLookup" runat="server" SelectMethod="GetLookup" TypeName="EmpService.EmpServiceClient"> </asp:ObjectDataSource><hr />
<asp:FormView ID="fvEmpInfo" runat="server"
DataSourceID="odsrcEmpInfo" DataKeyNames="empno"> <EditItemTemplate>
Empno:
<asp:TextBox ID="EmpnoTextBox" runat="server" Text='<%# Bind
("Empno") %>' /> <br />
Ename:
<asp:TextBox ID="EnameTextBox" runat="server" Text='<%# Bind
("Ename") %>' /> <br />
Sal:
<asp:TextBox ID="SalTextBox" runat="server" Text='<%# Bind("Sal") %>' /> <br />
Deptno:
<asp:TextBox ID="DeptnoTextBox" runat="server" Text='<%# Bind
("Deptno") %>' /> <br />
<br />
<asp:LinkButton ID="UpdateButton" runat="server"
CausesValidation="True" CommandName="Update" Text="Update" /> <asp:LinkButton ID="DeleteButton" runat="server"
CausesValidation="True" CommandName="Delete" Text="Delete" /> <asp:LinkButton ID="UpdateCancelButton" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel" /> </EditItemTemplate>
<InsertItemTemplate>
Empno:
<asp:TextBox ID="EmpnoTextBox" runat="server" Text='<%# Bind
("Empno") %>' /> <br />
Ename:
<asp:TextBox ID="EnameTextBox" runat="server" Text='<%# Bind
("Ename") %>' /> <br />
Sal:
<asp:TextBox ID="SalTextBox" runat="server" Text='<%# Bind("Sal")
%>' /> <br />
Deptno:
<asp:TextBox ID="DeptnoTextBox" runat="server" Text='<%# Bind
("Deptno") %>' /> <br />
<br />
<asp:LinkButton ID="InsertButton" runat="server"
CausesValidation="True" CommandName="Insert" Text="Insert" /> <asp:LinkButton ID="InsertCancelButton" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel" /> </InsertItemTemplate>
<ItemTemplate>
Empno:
<asp:Label ID="EmpnoLabel" runat="server" Text='<%# Bind("Empno")
%>' /> <br />
Ename:
<asp:Label ID="EnameLabel" runat="server" Text='<%# Bind("Ename")
%>' /> <br />
Sal:
<asp:Label ID="SalLabel" runat="server" Text='<%# Bind("Sal") %
>' /> <br />
Deptno:
<asp:Label ID="DeptnoLabel" runat="server" Text='<%# Bind
("Deptno") %>' /> <br />
</ItemTemplate>
</asp:FormView><asp:ObjectDataSource ID="odsrcEmpInfo"
runat="server" SelectMethod="GetInfo" TypeName="EmpService.EmpServiceClient" DataObjectTypeName="EmpService.Employee" DeleteMethod="Delete" InsertMethod="Add" UpdateMethod="Update"> <SelectParameters>
<asp:controlparameter ControlID="ddlEmpLookup" Name="EmpNo" PropertyName="SelectedValue" Type="Int32" /> </SelectParameters>
</asp:ObjectDataSource> <hr /><asp:GridView ID="gvEmpList"
runat="server" DataSourceID="odsrcEmpList"> </asp:GridView><asp:ObjectDataSource ID="odsrcEmpList"
runat="server" SelectMethod="GetList" TypeName="EmpService.EmpServiceClient"> </asp:ObjectDataSource>
</div>
</form>
</body>
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