Question

我有一个asp.net API，该API正在使用从服务器返回的xml数据。这是返回数据的格式（当我在地址栏中键入localhost ....时会得到什么）

ID = 3, fname = a, lname = a, phone = 123, company = abcID = 4, fname = a, lname = b, phone = c, company = dID = 5, fname = aa, lname = bb, phone = cc, company = ddID = 6, fname = Frame, lname = Blame, phone = 5555555555, company = Company

当我尝试使用C＃从API返回数据时，出现此错误

将值“ ID = 3，fname = a，lname = a，电话= 123，公司= abc”转换为类型“ TestData”时出错

这是我用来尝试检索数据的方法。要正确返回数据该怎么办？

        public List<TestData> GetGridInfo()
    {
        string URI = "http://localhost/api/getinfo";

        using (var webClient = new System.Net.WebClient())
        {
            var json = webClient.DownloadString(URI);

            var message = JsonConvert.DeserializeObject<List<TestData>>(json);

            return message;
        }
    }

这是API语法->

        public IEnumerable<string> Get()
    {
        List<string> result = new List<string>();
        using (XamarinEntities entities = new XamarinEntities())
        {
            result = entities.appinfoes.AsEnumerable().Where(x => x.approveduser == null || x.approveduser=="No").Select(y =>  "ID = "+y.ID+", fname = "+ y.fname+", lname = "+ y.lname+", phone = "+ y.phone+", company = "+ y.company).ToList();
        }
        return result;
    }

编辑->上面的语法是它在本地计算机上的外观，如果我使用服务器来访问本地主机，则这是我得到的格式，在我看来就像XML ...

<?xml version="1.0" encoding="ISO-8859-1"?>
<ArrayOfstring     xmlns="http://schemas.microsoft.com/2003/10/Serialization/Arrays"     xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<string>ID = 3, fname = a, lname = a, phone = 123, company = abc</string>
<string>ID = 4, fname = a, lname = b, phone = c, company = d</string>
<string>ID = 5, fname = aa, lname = bb, phone = cc, company = dd</string>
</ArrayOfstring>

Answer 1

您没有返回JSON。您返回的不是JSON的字符串数组

你应该做

public string Get()
{
    List<string> result = new List<string>();
    using (XamarinEntities entities = new XamarinEntities())
    {
        result = entities.appinfoes.AsEnumerable().Where(x => x.approveduser == null || x.approveduser=="No").Select(y =>  "ID = "+y.ID+", fname = "+ y.fname+", lname = "+ y.lname+", phone = "+ y.phone+", company = "+ y.company).ToList();
    }
    return JsonConvert.SerializeObject(result);
}

以上代码将返回JSON而不是字符串数组

更改代码以接收列表

例如

public List<string> GetGridInfo()
{
    string URI = "http://localhost/api/getinfo";

    using (var webClient = new System.Net.WebClient())
    {
        var json = webClient.DownloadString(URI);

        var message = JsonConvert.DeserializeObject<List<string>>(json);

        return message;
    }
}

一条建议使用HttpClient代替WebClient

从Asp.Net API返回XML数据

1 个答案: