如何：从使用 ASP.NET 创建的 Web 服务中引发异常

代码示例

下面的代码示例引发 SoapException 并通过设置 Detail 属性提供有关该异常的其他详细信息。 有关从 ASP.NET Web 服务中引发异常的更多信息，请参见“在 XML Web services 中处理和引发异常”。

示例

<%@ WebService Language="VB" class="ThrowSoapException"%>

Imports System
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.Xml.Serialization
Imports System.Xml

Public Class ThrowSoapException
    Inherits WebService
    
    ' This Web service method throws a SOAP client fault code. 
    <WebMethod()> _
    Public Sub myThrow()
        
        ' Build the detail element of the SOAP fault.
        Dim doc As New System.Xml.XmlDocument()
        Dim node As System.Xml.XmlNode = _
            doc.CreateNode(XmlNodeType.Element, _
            SoapException.DetailElementName.Name, _
            SoapException.DetailElementName.Namespace)
 
        ' Build specific details for the SoapException.
        ' Add first child of detail XML element.
        Dim details As System.Xml.XmlNode = _ 
            doc.CreateNode(XmlNodeType.Element, _
            "mySpecialInfo1", "http://tempuri.org/")

        ' Add second child of detail XML element with an attribute.
        Dim details2 As System.Xml.XmlNode = _
            doc.CreateNode(XmlNodeType.Element, _
            "mySpecialInfo2", "http://tempuri.org/")
        Dim attr As XmlAttribute = doc.CreateAttribute("t", _ 
            "attrName", "http://tempuri.org/")
        attr.Value = "attrValue"
        details2.Attributes.Append(attr)

        ' Append the two child elements to the detail node.
        node.AppendChild(details)
        node.AppendChild(details2)
                
        'Throw the exception.
        Dim se As New SoapException("Fault occurred", _
            SoapException.ClientFaultCode, _
            Context.Request.Url.AbsoluteUri, node)
        Throw se
        Return
    End Sub
End Class

<%@ WebService Language="C#" class="ThrowSoapException"%>

using System;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Serialization;
using System.Xml;

public class ThrowSoapException : WebService 
{
    // This Web service method throws a SOAP client fault code.
    [WebMethod]
    public void myThrow(){

        // Build the detail element of the SOAP fault.
        System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
        System.Xml.XmlNode node = doc.CreateNode(XmlNodeType.Element,
             SoapException.DetailElementName.Name,              SoapException.DetailElementName.Namespace);

        // Build specific details for the SoapException.
        // Add first child of detail XML element.
        System.Xml.XmlNode details =
          doc.CreateNode(XmlNodeType.Element, "mySpecialInfo1",
                         "http://tempuri.org/");
        System.Xml.XmlNode detailsChild = 
          doc.CreateNode(XmlNodeType.Element, "childOfSpecialInfo",
                         "http://tempuri.org/");
        details.AppendChild(detailsChild);
            
        // Add second child of detail XML element with an attribute.
        System.Xml.XmlNode details2 =
          doc.CreateNode(XmlNodeType.Element, "mySpecialInfo2",
                         "http://tempuri.org/");
        XmlAttribute attr = doc.CreateAttribute("t", "attrName",
                            "http://tempuri.org/");
        attr.Value = "attrValue";
        details2.Attributes.Append(attr);

        // Append the two child elements to the detail node.
        node.AppendChild(details);
        node.AppendChild(details2);
            
        //Throw the exception    
        SoapException se = new SoapException("Fault occurred",
          SoapException.ClientFaultCode,
          Context.Request.Url.AbsoluteUri ,
          node);

        throw se;
        return;
    }
}

请参见

任务

如何：处理由 Web 服务方法引发的异常

参考

SoapException Class
SoapHeaderException Class

概念

在 XML Web services 中处理和引发异常
生成 XML Web services 客户端

其他资源

Handling and Throwing Exceptions
使用 ASP.NET 的 XML Web services

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