Question

我有一个通常指向邮政编码查询网络服务的网址：

"http://localhost/afddata.pce?Serial=xxxxxx&Password=<PASSWORD>&UserID=<UNAME>&Data=Address&Task=PropertyLookup&Fields=List&MaxQuantity=200&Lookup=BD1+3RA"

我需要调用这个url，可能是使用HttWebRequest并获取输出，这是一个xml字符串（参见示例）：

<?xml version="1.0"?>
<AFDPostcodeEverywhere>
<Result>1</Result><ErrorText></ErrorText><Item value="1"><Postcode>BD1 3RA</Postcode>
<PostcodeFrom></PostcodeFrom>
<Key>BD1 3RA1001</Key>
<List>BD1 3RA     City of Bradford Metropolitan District Council, Fountain Hall, Fountain Street, BRADFORD</List>
<CountryISO>GBR</CountryISO>
</Item>
</AFDPostcodeEverywhere>

我的问题是，当我在浏览器中输入网址时，我在浏览器中获取了上面的xml，但是我无法通过代码获取此xml字符串。任何人都可以帮我PLZ！它非常非常紧急！根据我的阅读，我们需要提出肥皂要求，但我不知道该怎么做！提前谢谢！

Answer 1

就个人而言，我更喜欢使用XDocument.Load方法，然后使用LINQ-to-XML来读取结果。它比.NET框架中的其他解析机制更清晰。

var xmlDoc = XDocument.Load("http://localhost/afddata.pce?Serial=xxxxxx&Password=<PASSWORD>&UserID=<UNAME>&Data=Address&Task=PropertyLookup&Fields=List&MaxQuantity=200&Lookup=BD1+3RA");

然后，您可以使用LINQ来解析结果，或者调用ToString（）以将XML作为字符串获取。

Answer 2

您可以从HttpWebResponse对象获取XML响应（如果我记得的话，在System.Net命名空间下）。

要获得HttpWebResponse，首先必须构建一个HttpWebRequest对象。

见：

您可以使用以下代码将响应转换为可以遍历的XMLDocument：

HttpWebRequest HttpWReq = (HttpWebRequest)WebRequest.Create("http://pce.afd.co.uk/afddata.pce?...");
using (HttpWebResponse HttpWResp = (HttpWebResponse)HttpWReq.GetResponse())
{
       XmlDocument xmlDoc = new XmlDocument();
       xmlDoc.Load(HttpWResp.GetResponseStream());
}

编辑（1）：

有问题的公司似乎有一个ASMX webservice，您可以在.NET应用程序中使用它来获取必要的数据。

您需要密码和序列号（可以从URL获取）。

Answer 3

答案很晚，但我正在使用RestSharp来实现这项确切的服务。

Robert W发现的Web服务无法满足我的需求，因为它需要2次调用才能获取完整的地址数据，一次获取匹配列表，一次获取所选地址。

XML服务提供的格式包含所有匹配结果的完整地址数据。

这是我的解决方案。

您需要自定义IAuthenticator：

public class AfdAuthenticator : IAuthenticator
{
    private readonly string serial;
    private readonly string password;
    private readonly string userId;

    public AfdAuthenticator(string serial, string password, string userId)
    {
        this.serial = serial;
        this.password = password;
        this.userId = userId;
    }

    public void Authenticate(IRestClient client, IRestRequest request)
    {
        // AFD requires the authentication details to be included as query string parameters
        request.AddQueryParameter("Serial", this.serial);
        request.AddQueryParameter("Password", this.password);
        request.AddQueryParameter("UserID", this.userId);
    }
}

您需要回复课程：

[XmlRoot(ElementName = "AFDPostcodeEverywhere")]
public class AfdPostcodeEverywhere
{
    [XmlElement(ElementName = "Result")]
    public int Result { get; set; }

    [XmlElement(ElementName = "ErrorText")]
    public string ErrorText { get; set; }

    [XmlElement(ElementName = "Items")]
    public List<Item> Items { get; set; }
}

[XmlRoot(ElementName = "Item")]
public class Item
{
    [XmlElement(ElementName = "AbbreviatedPostalCounty")]
    public string AbbreviatedPostalCounty { get; set; }

    [XmlElement(ElementName = "OptionalCounty")]
    public string OptionalCounty { get; set; }

    [XmlElement(ElementName = "AbbreviatedOptionalCounty")]
    public string AbbreviatedOptionalCounty { get; set; }

    [XmlElement(ElementName = "PostalCounty")]
    public string PostalCounty { get; set; }

    [XmlElement(ElementName = "TraditionalCounty")]
    public string TraditionalCounty { get; set; }

    [XmlElement(ElementName = "AdministrativeCounty")]
    public string AdministrativeCounty { get; set; }

    [XmlElement(ElementName = "Postcode")]
    public string Postcode { get; set; }

    [XmlElement(ElementName = "DPS")]
    public string Dps { get; set; }

    [XmlElement(ElementName = "PostcodeFrom")]
    public string PostcodeFrom { get; set; }

    [XmlElement(ElementName = "PostcodeType")]
    public string PostcodeType { get; set; }

    [XmlElement(ElementName = "Phone")]
    public string Phone { get; set; }

    [XmlElement(ElementName = "Key")]
    public string Key { get; set; }

    [XmlElement(ElementName = "List")]
    public string List { get; set; }

    [XmlElement(ElementName = "Locality")]
    public string Locality { get; set; }

    [XmlElement(ElementName = "Property")]
    public string Property { get; set; }

    [XmlElement(ElementName = "Street")]
    public string Street { get; set; }

    [XmlElement(ElementName = "Name")]
    public string Name { get; set; }

    [XmlElement(ElementName = "Organisation")]
    public string Organisation { get; set; }

    [XmlElement(ElementName = "Town")]
    public string Town { get; set; }

    [XmlAttribute(AttributeName = "value")]
    public int Value { get; set; }
}

我通过使用PostMan调用服务然后使用Xml2CSharp从XML生成类来生成这些

然后你可以使用这段代码：

// Create a RestClient passing in a custom authenticator and base url
var client = new RestClient
    {
        Authenticator = new AfdAuthenticator("YOUR SERIAL", "YOUR PASSWORD", "YOUR USERID"),
        BaseUrl = new UriBuilder("http", "pce.afd.co.uk").Uri
    };

// Create a RestRequest using the AFD service endpoint and setting the Method to GET
var request = new RestRequest("afddata.pce", Method.GET);

// Add the required AFD query string parameters
request.AddQueryParameter("Data", "Address");
request.AddQueryParameter("Task", "FastFind");
request.AddQueryParameter("Fields", "Simple");
request.AddQueryParameter("Lookup", "BD1 3RA");

    // Execute the request expecting an AfdPostcodeEverywhere returned 
var response = client.Execute<AfdPostcodeEverywhere>(request);

// Check that RestSharp got a response
if (response.StatusCode != HttpStatusCode.OK)
{
    throw new Exception(response.StatusDescription);
}

// Check that RestSharp was able to process the response
if (response.ResponseStatus != ResponseStatus.Completed)
{
    throw new Exception(response.ErrorMessage, response.ErrorException);
}

var afdPostcodeEverywhere = response.Data;

// Check that AFD returned data
if (afdPostcodeEverywhere.Result < 0)
{
    throw new Exception(afdPostcodeEverywhere.ErrorText);
}

// Process the results
var addresses = afdPostcodeEverywhere.Items;

数据，任务，字段和查找选项以及所有结果代码的完整详细信息可以在SDK中包含的AFD API文档中找到。

查询邮政编码查找Web服务通过代码

3 个答案:

编辑（1）：