.net web service 调用的几种方式

偏执的太偏执、 2022-09-25 11:30 185阅读 0赞

首先当然是开发一个webservice，我们来个简单的计算器的实现，代码如下

\[c-sharp\] [view plain][] [copy][view plain]

1.  **using** System; 
2.  **using** System.Collections; 
3.  **using** System.ComponentModel; 
4.  **using** System.Data; 
5.  **using** System.Linq; 
6.  **using** System.Web; 
7.  **using** System.Web.Services; 
8.  **using** System.Web.Services.Protocols; 
9.  **using** System.Xml.Linq; 
10. **namespace** WebServiceApp 
11. \{ 
12. /// <summary>
13. /// CalcService 的摘要说明
14. /// </summary>
15.  \[WebService(Namespace = "http://tempuri.org/")\] 
16.  \[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1\_1)\] 
17.  \[ToolboxItem(**false**)\] 
18. // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
19. //\[System.Web.Script.Services.ScriptService\]
20. **public****class** CalcService : System.Web.Services.WebService 
21.  \{ 
22.  \[WebMethod\] 
23. **public****double** Add(**double** x, **double** y) 
24.  \{ 
25. **return** x + y; 
26.  \} 
27.  \[WebMethod\] 
28. **public****double** Minus(**double** x, **double** y) 
29.  \{ 
30. **return** x - y; 
31.  \} 
32.  \[WebMethod\] 
33. **public****double** Multiply(**double** x, **double** y) 
34.  \{ 
35. **return** x \* y; 
36.  \} 
37.  \[WebMethod\] 
38. **public****double** Devide(**double** x, **double** y) 
39.  \{ 
40. **return** x / y; 
41.  \} 
42.  \[WebMethod\] 
43. **public****double** Power(**double** x, **int** n) 
44.  \{ 
45. **double** result = 1; 
46. **for** (**int** i = 1; i <= n; i++) 
47.  \{ 
48.  result \*= x; 
49.  \} 
50. **return** result; 
51.  \} 
52.  \[WebMethod\] 
53. **public****double** Sin(**double** x) 
54.  \{ 
55. **return** Math.Sin(x); 
56.  \} 
57.  \[WebMethod\] 
58. **public****double** Cos(**double** x) 
59.  \{ 
60. **return** Math.Cos(x); 
61.  \} 
62.  \} 
63. \}

好，这么一个简单的webservice是开发完了,用IIS发布

调用的URL为： http://localhost/WebServiceApp/CalcService.asmx

下面分别介绍三种方式来调用该webservice，分别是：ASP.NET、Javascript、WinForm

先说第一种方式ASP.NET

新建一个ASP.NET网络应用程序，我取名为WebClient

第一步当然是添加web引用，把刚才的webservice调用网站复制到输入框中，然后取名为默认的localhost

在Default.aspx页面代码中添加如下代码

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1.  <%@ Page Language="C\#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebClient.\_Default" %> 
2.  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
3.  <html xmlns="http://www.w3.org/1999/xhtml" > 
4.  <head runat="server"> 
5.   <title>WebService Test</title> 
6.  </head> 
7.  <body> 
8.   <form id="form1" runat="server"> 
9.   <div> 
10.  <asp:TextBox ID="num1" runat="server"></asp:TextBox> 
11.  <asp:DropDownList ID="oper" runat="server" AutoPostBack="True"
12.  onselectedindexchanged="oper\_SelectedIndexChanged"> 
13.  <asp:ListItem Text="+" Value="+" Selected="True"></asp:ListItem> 
14.  <asp:ListItem Text="-" Value="-"></asp:ListItem> 
15.  <asp:ListItem Text="\*" Value="\*"></asp:ListItem> 
16.  <asp:ListItem Text="/" Value="/"></asp:ListItem> 
17.  <asp:ListItem Text="power" Value="power"></asp:ListItem> 
18.  <asp:ListItem Text="sin" Value="sin"></asp:ListItem> 
19.  <asp:ListItem Text="cos" Value="cos"></asp:ListItem> 
20.  </asp:DropDownList> 
21.  <asp:TextBox ID="num2" runat="server"></asp:TextBox> 
22.  <asp:Button ID="btnResult" runat="server" Text="=" οnclick="btnResult\_Click" /> 
23.  <asp:TextBox ID="result" runat="server"></asp:TextBox> 
24.  </div> 
25.  </form> 
26. </body> 
27. </html>

也就是提供输入数字和显示结果的界面，很简单

后台代码为

\[c-sharp\] [view plain][] [copy][view plain]

1.  **using** System; 
2.  **using** System.Collections; 
3.  **using** System.Configuration; 
4.  **using** System.Data; 
5.  **using** System.Linq; 
6.  **using** System.Web; 
7.  **using** System.Web.Security; 
8.  **using** System.Web.UI; 
9.  **using** System.Web.UI.HtmlControls; 
10. **using** System.Web.UI.WebControls; 
11. **using** System.Web.UI.WebControls.WebParts; 
12. **using** System.Xml.Linq; 
13. **namespace** WebClient 
14. \{ 
15. **public** partial **class** \_Default : System.Web.UI.Page 
16.  \{ 
17. **protected****void** Page\_Load(**object** sender, EventArgs e) 
18.  \{ 
19.  \} 
20. **protected****void** btnResult\_Click(**object** sender, EventArgs e) 
21.  \{ 
22. **double** num1 = Double.Parse(**this**.num1.Text.Trim()); 
23. **double** num2 = Double.Parse(**this**.num2.Text.Trim()); 
24. **string** oper = **this**.oper.SelectedValue; 
25. **double** result = 0; 
26. 
27.  localhost.CalcService service = **new** WebClient.localhost.CalcService(); 
28. **switch** (oper) 
29.  \{ 
30. **case**"+": 
31.  result = service.Add(num1, num2); 
32. **break**; 
33. **case**"-": 
34.  result = service.Minus(num1, num2); 
35. **break**; 
36. **case**"\*": 
37.  result = service.Multiply(num1, num2); 
38. **break**; 
39. **case**"/": 
40.  result = service.Devide(num1, num2); 
41. **break**; 
42. **case**"power": 
43.  result = service.Power(num1,(**int**)num2); 
44. **break**; 
45. **case**"sin": 
46.  result = service.Sin(num1); 
47. **break**; 
48. **case**"cos": 
49.  result = service.Cos(num1); 
50. **break**; 
51. **default**: 
52.  result = service.Add(num1, num2); 
53. **break**; 
54.  \} 
55. **this**.result.Text = result + ""; 
56.  \} 
57. **protected****void** oper\_SelectedIndexChanged(**object** sender, EventArgs e) 
58.  \{ 
59. **string** oper = **this**.oper.SelectedValue; 
60. **if** (oper.Equals("sin") || oper.Equals("cos")) 
61.  \{ 
62. **this**.num2.Visible = **false**; 
63.  \} 
64. **else**
65.  \{ 
66. **this**.num2.Visible = **true**; 
67.  \} 
68.  \} 
69.  \} 
70. \}

着重要看的是下面一行代码

localhost.CalcService service = new WebClient.localhost.CalcService();

该代码将创建了一个我们开发的webservice的计算器实例

然后通过该实例去调用webservice暴露出来的服务接口

结果

![0_13089908489CR9.gif][]

[view plain]: http://blog.csdn.net/cyxlzzs/article/details/6567497#
[0_13089908489CR9.gif]: /images/20220717/2d6c0fa53dbc44a5b1e3105c965155be.png