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在 C# 中，当连接到 Magento API 时，它会在成功登录时抛出异常：

// connect to the first store
_magentoService = new MagentoService {Url = "http://store1.com/index.php/api/v2_soap"};
_magentoService.login(user1, password1);

// later on, connect to the second store (note the different url)
_magentoService = new MagentoService {Url = "http://store2.com/index.php/api/v2_soap"};
_magentoService.login(user2, password2);

连接到第一家商店返回：

<?xml version="1.0" encoding="UTF-8"?><SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="urn:Magento" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><SOAP-ENV:Body><ns1:loginResponse><loginReturn xsi:type="xsd:string">bec0144c8642f227e8fb3d032f40xxxx</loginReturn></ns1:loginResponse></SOAP-ENV:Body></SOAP-ENV:Envelope>

这是成功登录所期望的确切响应。连接到第二个商店也会返回完全相同的结果，并且还会引发异常：

  System.Net.WebException was caught
  Message=The request failed with the error message:
  <?xml version="1.0" encoding="UTF-8"?><SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="urn:Magento" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><SOAP-ENV:Body><ns1:loginResponse><loginReturn xsi:type="xsd:string">bec0144c8642f227e8fb3d032f40zzzz</loginReturn></ns1:loginResponse></SOAP-ENV:Body></SOAP-ENV:Envelope>
  Source=System.Web.Services
  StackTrace:
       at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
       at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)

为什么登录成功后会抛出异常？第一个站点（成功）是 Magento v1.6，失败的商店是 Magento v1.7

我通过网络参考使用 Magento，login() 方法的生成代码如下。调用 this.Invoke 时发生异常：

[System.Web.Services.Protocols.SoapRpcMethodAttribute("urn:Mage_Api_Model_Server_V2_HandlerAction", RequestNamespace="urn:Magento", ResponseNamespace="urn:Magento")]
[return: System.Xml.Serialization.SoapElementAttribute("loginReturn")]
public string login(string username, string apiKey) {
    object[] results = this.Invoke("login", new object[] {
                username,
                apiKey});
    return ((string)(results[0]));
}
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