Category: WCF

07 Mar 2017 19:54

Joined:	25/09/2006
Level:	Gold
Points:	477

Points:	5

Wcf error There was an error deserializing the object of type System.String. End element 'root' from

try
{
WebClient proxy = new WebClient();
byte[] data = proxy.DownloadData("http://localhost:36/Service.svc/GetData");
Stream stream = new MemoryStream(data);
DataContractJsonSerializer obj = new DataContractJsonSerializer(typeof(string));
string result = obj.ReadObject(stream).ToString();
Console.WriteLine(result.ToString());
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
error There was an error deserializing the object of type System.String. End element 'root' from namespace '' expected. Found element 'd' from namespace '
There was an error deserializing the object of type System.String. End element 'root' from namespace '' expected. Found element 'd' from namespace '

#769018

08 Mar 2017 13:40

Joined:	18/12/2008
Level:	Gold
Points:	2921

Points:	4

Hi,

This issue might come because of couple of reasons.
If you are not declared the variables properly you might get this issue and one more thing is if array was not used in a proper manner.


[DataMember]
private string _name;
public string player_name

The above will give this same error you got. To overcome we should declare like below.


private string _name;
[DataMember]
public string player_name

If the variable is not mandatory make it as false.


[DataMember(Name = "RequestId", IsRequired = false)]

Also check your Json format. Most of the issue are happen because of Json format.

Thanks,
Mani

#769019

08 Mar 2017 14:28

Joined:	25/09/2006
Level:	Gold
Points:	477

Points:	1

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class Service : IService
{

public string GetData()
{

SqlConnection con = new SqlConnection("Data Source=.;Persist Security Info=True;password=CACHEmemory1234;User ID=sa;Initial Catalog=HRAdminAffairs");
con.Open();
SqlCommand cmd = new SqlCommand("getNationality", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@CompanyName", "hasoub");

SqlDataAdapter sda = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
sda.Fill(ds);
cmd.ExecuteNonQuery();
con.Close();
DataTable dt = ds.Tables[0];
JavaScriptSerializer serializer = new JavaScriptSerializer();
List<Dictionary<string, object>> rows = new List<Dictionary<string, object>>();
Dictionary<string, object> row;
foreach (DataRow dr in dt.Rows)
{
row = new Dictionary<string, object>();
foreach (DataColumn col in dt.Columns)
{
row.Add(col.ColumnName, dr[col]);
}
rows.Add(row);
}
return serializer.Serialize(rows);
}
[ServiceContract]
public interface IService
{
//[WebGet(UriTemplate = "/Employees", ResponseFormat = WebMessageFormat.Xml)]
// [WebInvoke(Method = "POST", ResponseFormat = WebMessageFormat.Json)]
[OperationContract]
[WebInvoke( Method = "GET", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]

// [WebGet(UriTemplate = "GetData", ResponseFormat = WebMessageFormat.Json)]
string GetData();

//[DataContract]
//public class employee
//{
// [datamember]
// public datatable employeetable
// {
// get;
// set;
// }
//}
}

Wcf error There was an error deserializing the object of type System.String. End element 'root' from

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