- How to Consume a Web Service
- Creating the Web Service Consumer
- Testing the Web Service Consumer
- Summary
This chapter is from the book
This chapter is from the book
This chapter is from the book
Creating the Web Service Consumer
Now that you have created your proxy, you need to create an ASP.NET Web Forms page to call your Web Service and display the results to the user's Web browser.
-
Open your favorite text editor, and type in one of the following blocks of code:
VB Code Listing
-
Save the file as
<html>
<head>
<title>Developer Estimate</title>
<script language=vb runat=server>
sub btnGo_Click(Sender as Object, E as EventArgs)
dim wsPMCalc as new Pmcalc
dim intHours as integer
intHours = txtDeveloperEstimate.text.toInt32
lblResult.text = wsPMCalc.DeveloperEstimate(intHours).toString
end sub
</script>
</head>
<body>
<form runat=server>
<p align="center"><b>Developer Time Estimate for Project Managers</b></p>
<p>Enter Developers Estimate: <asp:textbox id=txtDeveloperEstimate
size=5 runat=server />
<asp:button id= btnGo text=Go runat=server onClick=btnGo_Click /></p>
<p>Modified Projected Estimate: <asp:Label id=lblResult runat=server /></p>
</form>
</body>
</html>
C# Code Listing
<html>
<head>
<title>Developer Estimate</title>
<script language=CSharp runat=server>
public void btnGo_Click(Object Sender, System.EventArgs E) {
Pmcalc wsPMCalc = new Pmcalc();
Int32 intHours;
intHours = txtDeveloperEstimate.Text.ToInt32();
lblResult.Text = wsPMCalc.DeveloperEstimate(intHours).ToString();
}
</script>
</head>
<body>
<form runat=server>
<p align="center"><b>Developer Time Estimate for Project Managers</b></p>
<p>Enter Developers Estimate: <asp:textbox id=txtDeveloperEstimate
size=5 runat=server />
<asp:button id= btnGo text=Go runat=server onClick=btnGo_Click /></p>
<p>Modified Projected Estimate: <asp:Label id=lblResult runat=server /></p>
</form>
</body>
</html>
c:\pmcalc_web\default.aspx
Examining Your Web Page Code
Before you continue, spend a moment to look at the code. No matter which language you chose to use, there are two things I want to point out. First, notice that you are not using typical HTML form fields. Instead, you are using ASP.NET server-side controls. When these tags are processed on the server, the ASP.NET Web Forms HTTP Handler interprets and renders them as HTML. These Server Side controls give you a high degree of programmability when creating your Web Forms applications.
Second, notice that you have a method called btnGo_Click, which is an event handler that fires when the user clicks the Go button. This "post-back" and event-based programming model is a little different from the "classic" ASP pages you might have created in the past.
After the user fires the btnGo_Click event, a call to the Web Service is made (via the proxy). Notice how your code to reference and call the Web Service treats it as though it were an object residing on your physical system. This is the value of the proxy: to make method calls transparent to the user-programmer.