HttpSimpleClientProtocol.Invoke(String, String, Object[]) 方法

参考

定义

命名空间:: System.Web.Services.Protocols

程序集:: System.Web.Services.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

使用 HTTP 调用 XML Web services 方法。

protected:
 System::Object ^ Invoke(System::String ^ methodName, System::String ^ requestUrl, cli::array <System::Object ^> ^ parameters);

protected object Invoke (string methodName, string requestUrl, object[] parameters);

member this.Invoke : string * string * obj[] -> obj

Protected Function Invoke (methodName As String, requestUrl As String, parameters As Object()) As Object

参数

methodName: String

正调用 Invoke(String, String, Object[]) 方法的派生类中的 XML Web services 方法的名称。

requestUrl: String

客户端正在请求的 XML Web services 方法的 URL。

parameters: Object[]

一个对象数组，包含要传递到远程 XML Web services 的参数。数组中值的顺序与派生类的调用方法中的参数顺序对应。

Object

包含派生类方法的返回值、所有引用或 out 参数的对象数组。

例外

Exception

请求到达了服务器计算机，但未被成功处理。

示例

下面的代码示例是一个 ASP.NET Web 窗体，它调用名为的 MathXML Web 服务。在 EnterBtn_Click 函数中，Web 窗体以同步方式调用 Add XML Web 服务方法。

<%@ Page Language="VB" %>
<html>
    <script language="VB" runat="server">
    Sub EnterBtn_Click(Src As Object, E As EventArgs)
        Dim math As New Math()
        
        ' Call to Add XML Web service method.
        Dim result As Integer = math.Add(Convert.ToInt32(Num1.Text),Convert.ToInt32(Num2.Text))
        
        Total.Text = "Total: " & result.ToString()
    End Sub 'EnterBtn_Click
 
  </script>
 
    <body>
       <form action="MathClient.aspx" runat=server>
           
          Enter the two numbers you want to add and then press the Total button.
          <p>
          Number 1: <asp:textbox id="Num1" runat=server/>  +
          Number 2: <asp:textbox id="Num2" runat=server/> =
          <asp:button text="Total" Onclick="EnterBtn_Click" runat=server/>
          <p>
          <asp:label id="Total"  runat=server/>
          
       </form>
    </body>
 </html>

下面的代码示例是由 Web 服务描述语言工具 (Wsdl.exe) 为 Math 以下 XML Web 服务生成的代理类。 Add在代理类的方法中Invoke，方法以同步方式调用 Add Web 服务方法。

#using <System.Web.Services.dll>
#using <System.Xml.dll>
#using <System.dll>

using namespace System::Diagnostics;
using namespace System::Xml::Serialization;
using namespace System;
using namespace System::Web::Services::Protocols;
using namespace System::Web::Services;

namespace MyMath
{

   [System::Web::Services::WebServiceBindingAttribute(Name="MathSoap",Namespace="http://tempuri.org/")]
   public ref class Math: public System::Web::Services::Protocols::SoapHttpClientProtocol
   {
   public:

      [System::Diagnostics::DebuggerStepThroughAttribute]
      Math()
      {
         this->Url = "http://www.contoso.com/math.asmx";
      }


      [System::Diagnostics::DebuggerStepThroughAttribute]
      [System::Web::Services::Protocols::SoapDocumentMethodAttribute("http://tempuri.org/Add",
      Use=System::Web::Services::Description::SoapBindingUse::Literal,
      ParameterStyle=System::Web::Services::Protocols::SoapParameterStyle::Wrapped)]
      int Add( int num1, int num2 )
      {
         array<Object^>^temp0 = {num1,num2};
         array<Object^>^results = this->Invoke( "Add", temp0 );
         return  *dynamic_cast<int^>(results[ 0 ]);
      }


      [System::Diagnostics::DebuggerStepThroughAttribute]
      System::IAsyncResult^ BeginAdd( int num1, int num2, System::AsyncCallback^ callback, Object^ asyncState )
      {
         array<Object^>^temp1 = {num1,num2};
         return this->BeginInvoke( "Add", temp1, callback, asyncState );
      }


      [System::Diagnostics::DebuggerStepThroughAttribute]
      int EndAdd( System::IAsyncResult^ asyncResult )
      {
         array<Object^>^results = this->EndInvoke( asyncResult );
         return  *dynamic_cast<int^>(results[ 0 ]);
      }

   };

}

namespace MyMath {
    using System.Diagnostics;
    using System.Xml.Serialization;
    using System;
    using System.Web.Services.Protocols;
    using System.Web.Services;

    [System.Web.Services.WebServiceBindingAttribute(Name="MathSoap", Namespace="http://tempuri.org/")]
    public class Math : System.Web.Services.Protocols.SoapHttpClientProtocol {

        [System.Diagnostics.DebuggerStepThroughAttribute()]
        public Math() {
            this.Url = "http://www.contoso.com/math.asmx";
        }

        [System.Diagnostics.DebuggerStepThroughAttribute()]
        [System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/Add", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]
        public int Add(int num1, int num2) {
            object[] results = this.Invoke("Add", new object[] {num1,
                        num2});
            return ((int)(results[0]));
        }

        [System.Diagnostics.DebuggerStepThroughAttribute()]
        public System.IAsyncResult BeginAdd(int num1, int num2, System.AsyncCallback callback, object asyncState) {
            return this.BeginInvoke("Add", new object[] {num1,
                        num2}, callback, asyncState);
        }

        [System.Diagnostics.DebuggerStepThroughAttribute()]
        public int EndAdd(System.IAsyncResult asyncResult) {
            object[] results = this.EndInvoke(asyncResult);
            return ((int)(results[0]));
        }
    }
}

Namespace MyMath
    
    <System.Web.Services.WebServiceBindingAttribute(Name:="MathSoap", [Namespace]:="http://tempuri.org/")>  _
    Public Class Math
        Inherits System.Web.Services.Protocols.SoapHttpClientProtocol
        
        <System.Diagnostics.DebuggerStepThroughAttribute()>  _
        Public Sub New()
            MyBase.New
            Me.Url = "http://www.contoso.com/math.asmx"
        End Sub
        
        <System.Diagnostics.DebuggerStepThroughAttribute(),  _
         System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/Add", Use:=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle:=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)>  _
        Public Function Add(ByVal num1 As Integer, ByVal num2 As Integer) As Integer
            Dim results() As Object = Me.Invoke("Add", New Object() {num1, num2})
            Return CType(results(0),Integer)
        End Function
        
        <System.Diagnostics.DebuggerStepThroughAttribute()>  _
        Public Function BeginAdd(ByVal num1 As Integer, ByVal num2 As Integer, ByVal callback As System.AsyncCallback, ByVal asyncState As Object) As System.IAsyncResult
            Return Me.BeginInvoke("Add", New Object() {num1, num2}, callback, asyncState)
        End Function
        
        <System.Diagnostics.DebuggerStepThroughAttribute()>  _
        Public Function EndAdd(ByVal asyncResult As System.IAsyncResult) As Integer
            Dim results() As Object = Me.EndInvoke(asyncResult)
            Return CType(results(0),Integer)
        End Function
    End Class
End Namespace

下面的代码示例是 Math XML Web 服务，从中创建了上述代理类。

<%@ WebService Language="C#" Class="Math"%>
 using System.Web.Services;
 using System;
 
 public class Math {
      [ WebMethod ]
      public int Add(int num1, int num2) {
          return num1+num2;
          }
 }

<%@ WebService Language="VB" Class="Math"%>
Imports System.Web.Services
Imports System

Public Class Math
    <WebMethod()> _
    Public Function Add(num1 As Integer, num2 As Integer) As Integer
        Return num1 + num2
    End Function 'Add
End Class 'Math

注解

参数 methodName 用于查找参数的类型，并返回调用 Invoke 方法的方法的值。它还用于查找可能已添加到方法的自定义属性。 HttpMethodAttribute 和 XmlElementAttribute 提供有关 SOAP 协议所需的派生方法的其他信息。

适用于

通过

HttpSimpleClientProtocol.Invoke(String, String, Object[]) 方法

定义

参数

返回

例外

示例

注解

适用于

其他资源