qr code generator c# code project Generate a test client for your WCF service by using Svcutil.exe. Start by opening a in C#

Print QR Code in C# Generate a test client for your WCF service by using Svcutil.exe. Start by opening a

14. Generate a test client for your WCF service by using Svcutil.exe. Start by opening a
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Navigate to the files you generated. Open these files and examine them. There should be a configuration file that defines an endpoint for communicating with the service. There should also be a code file that shows how to call the WCF service. This is the proxy class you can use to write an actual client. These are also the same files that get generated when you set a service reference to a WCF service.
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E xErcIsE 2 Consuming a WCF Service
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In this exercise, you create a web client for accessing the WCF service created in the previous exercise.
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1. 2.
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Continue editing the solution you created in the previous exercise. Alternatively, you can open the completed Lesson 3, Exercise 1 solution in the samples installed from the CD. Add a new website to the solution: right-click the solution and choose Add | New Web Site. Select ASP.NET Web Site. Name the website shipperClient. Right-click the website and choose Set As StartUp Project. Right-click the newly added website and choose Add Service Reference. Click Discover in the Add Service Reference dialog box. Select the ShipperService. Set the namespace to nwservices. Click OK to close the dialog box. Open the Default.aspx page of the ShipperClient site. Add controls to the page to allow the user to select a shipper based on ID, display the details of that shipper, edit the shipper details, and save the details back to the WCF service. Your form layout should be similar to that shown in Figure 10-13.
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616 ChAPTER 10
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Writing and Working with HTTP Modules and Web Services
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FigURE 10-13 The client form layout.
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Add code to the Get Shipper button s click event to call the WCF service and put the results into the Shipper Data form. Your code should look as follows.
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Sample of Visual Basic Code Protected Sub ButtonGet_Click(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles ButtonGetShipper.Click 'todo: add validation & error handling Dim shipperId As Integer = Integer.Parse(TextBoxShipperCode.Text) Dim nwShipper As New NwServices.ShipperServiceClient() Dim shipper As NwServices.Shipper shipper = nwShipper.GetShipper(shipperId) TextBoxShipperId.Text = shipper.ShipperId.ToString() TextBoxCompany.Text = shipper.CompanyName TextBoxPhone.Text = shipper.Phone End Sub
Lesson 3: Creating and Consuming WCF Services
ChAPTER 10
Sample of C# Code protected void ButtonGet_Click(object sender, EventArgs e) { //todo: add validation & error handling int shipperId = int.Parse(TextBoxShipperCode.Text); NwServices.ShipperServiceClient nwShipper new NwServices.ShipperServiceClient(); =
NwServices.Shipper shipper = new NwServices.Shipper(); shipper = nwShipper.GetShipper(shipperId); TextBoxShipperId.Text = shipper.ShipperId.ToString(); TextBoxCompany.Text = shipper.CompanyName; TextBoxPhone.Text = shipper.Phone; }
Add code to the Save button s click event to call the WCF service with the values from the various TextBox controls. Your code should look as follows.
Sample of Visual Basic Code Protected Sub ButtonSave_Click(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles ButtonSave.Click 'todo: add validation & error handling Dim shipper As New NwServices.Shipper() shipper.ShipperId = Integer.Parse(TextBoxShipperId.Text) shipper.CompanyName = TextBoxCompany.Text shipper.Phone = TextBoxPhone.Text Dim nwShipper As New NwServices.ShipperServiceClient() nwShipper.SaveShipper(shipper) End Sub Sample of C# Code protected void ButtonSave_Click(object sender, EventArgs e) { //todo: add validation & error handling NwServices.Shipper shipper = new NwServices.Shipper(); shipper.ShipperId = int.Parse(TextBoxShipperId.Text); shipper.CompanyName = TextBoxCompany.Text; shipper.Phone = TextBoxPhone.Text; NwServices.ShipperServiceClient nwShipper = new NwServices.ShipperServiceClient(); nwShipper.SaveShipper(shipper); }
Run the application. Enter a Shipper ID (1, 2, or 3). Edit the data and save it back to the database.
618 ChAPTER 10
Writing and Working with HTTP Modules and Web Services
Lesson Summary
WCF is a unifying programming model for creating service-oriented applications. With WCF, you can create services that work with HTTP, TCP, MSMQ, and named pipes. ASP.NET and IIS allow you to host WCF services that you want to expose as HTTP. You can use this model to write services that take advantage of ASP.NET features such as session state and security. You write a WCF service by first defining a contract (typically as an interface). The contract uses the ServiceContract and OperationContract attribute classes to define the service and its methods, respectively. You can write WCF services that can be called from AJAX by using the REST protocol and JSON message format. You do so by decorating your service with the WebInvokeAttribute class. You can create WCF Data Services to be used with the Open Data Protocol (OData). You do so by inheriting from the DataServices class and using the DataServiceConfiguration class to indicate which items of your data model you intend to expose.
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