我的RESTFUL Web服务和我的Web应用程序中有这两个类
public class Service
{
public int ID { get; set; }
public int HCode { get; set; }
public int HUserID { get; set; }
public string PatientNID { get; set; }
public List<Document> DocumentList { get; set; }
public int ServiceTypeID { get; set; }
public string TestName { get; set; }
public string Comment { get; set; }
public DateTime Date { get; set; }
}
public class Document
{
public int ID { get; set; }
public int ServiceID { get; set; }
public string FileName { get; set; }
public string Extension { get; set; }
public byte[] ByteDocument { get; set; }
}
这是收发对象并在网络服务中发回列表
public List<Serivce> GetServiceByHUserID(Service service)
{
SqlCommand cmd = new SqlCommand(
"SELECT *"
+ " FROM TransactionHistory"
+ " WHERE UserID = @HUserUserIDParam"
, con);
cmd.Parameters.Add(
"@HUserUserIDParam", SqlDbType.NVarChar).Value = service.HUserID;
return GetServiceResponse(cmd);
}
private List<Service> GetServiceResponse(SqlCommand cmd)
{
List<Service> serviceList = new List<Service>();
try
{
// Filling Data
....
}
return serviceList;
}
catch (Exception e) { return null; }
finally { con.Close(); }
}
这是Web应用程序中的发送对象和接收列表
private List<Service> GetServiceListResponse(HttpWebRequest request
, Service service)
{
try
{
var json = new JavaScriptSerializer().Serialize(service);
request.Method = "POST";
request.ContentType = "application/json";
request.ContentLength = json.Length;
StreamWriter requestWriter = new StreamWriter(request.GetRequestStream(),
System.Text.Encoding.ASCII);
requestWriter.Write(json);
requestWriter.Close();
WebResponse webResponse = request.GetResponse();
Stream webStream = webResponse.GetResponseStream();
StreamReader responseReader = new StreamReader(webStream);
string response = responseReader.ReadToEnd();
JavaScriptSerializer serializer = new JavaScriptSerializer();
// ERROR HERE
dynamic item = serializer.Deserialize<List<Service>>(response);
// ERROR HERE
responseReader.Close();
return item;
}
catch (Exception e) { return null; }
}
当我尝试返回List&lt; .Service&gt;作为一个JSON对象并反序列化它我得到了该错误
这是例外
无法将'System.String'类型的对象转换为'System.Byte []'
答案 0 :(得分:0)
我找到了解决方案
这只是改变我在序列化和反序列化中使用的类(在.NET中构建的类称为 JavaScriptSerializer )
从 JavaScriptSerializer ()到 JsonConvert
在Github上发布:https://github.com/JamesNK/Newtonsoft.Json/releases
NuGut上的最新软件包:安装包Newtonsoft.Json
Newtonsoft网站:http://www.newtonsoft.com/json
在引用dll或下载软件包之后,引用代码中的dll(在.cs类中):
using Newtonsoft.Json;
其他参考资料:
using System.IO;
using System.Text;
在发送和使用 UTF8 编码之前序列化json对象:
string json = JsonConvert.SerializeObject(service);
request.Method = "POST";
request.Method = "POSt";
request.ContentType = "application/json";
request.ContentLength = Encoding.UTF8.GetByteCount(json);
StreamWriter requestWriter = new StreamWriter(request.GetRequestStream(), new UTF8Encoding(false));
requestWriter.Write(json);
requestWriter.Close();
在收到回复后反序列化json对象:
List<Service> serviceList = JsonConvert.DeserializeObject<List<Service>>(response);