具体是这样的:
invoke the web service of http://samples.gotdotnet.com/quickstart/aspplus/samples/services/MathService/CS/MathService.asmx?WSDL
which service privided the math mothd such as add/sub/mulite/div.
I invoke the mothd in the win ce with compact framework,
ye,the result is out at faniliy.I am happy now.
some source followed :
switch (comboBox1.SelectedItem.ToString()) { case "+": textBox3.Text = MathService.Add(Single.Parse(textBox1.Text),Single.Parse(textBox2.Text)).ToString(); break; case "-": textBox2.Text = MathService.Subtract(Single.Parse(textBox1.Text),Single.Parse(textBox2.Text)).ToString(); break; case "*": textBox2.Text = MathService.Multiply(Single.Parse(textBox1.Text),Single.Parse(textBox2.Text)).ToString(); break; case "/": textBox2.Text = MathService.Divide(Single.Parse(textBox1.Text),Single.Parse(textBox2.Text)).ToString(); break; } 
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