CODEWITHSUNDEEP
jsonasp.net-mvc-4deserialization
Karthik
Karthik

Reputation: 207

{"No parameterless constructor defined for type of 'System.String[]'."} while deserailsing json data

This is my controller 

[NoCache]
    public ActionResult SaveAssociate(string data)
    {
        JavaScriptSerializer json = new JavaScriptSerializer();
        List<string> mystring = json.Deserialize<List<string>>(data);
        return Content("Hai");
    }

Expression data value :

[{"AssetName":"8888","AssetNumber":"8888","Classification":null,"ParentAsset":null,"SerialNumber":"8888","ParentCompany":"JPL Holdings","Barcode":null,"RFIDTags":null,"AssetId":"dfe2ae51-f153-4a67-bd3b-0114d8a40751","Notes":null,"Manufacturer":null,"DepartmentId":null,"Department":null,"SupplierId":null,"Supplier":null},{"AssetName":"552014","AssetNumber":"552014","Classification":null,"ParentAsset":"8888","SerialNumber":"552014","ParentCompany":"JPL Holdings","Barcode":null,"RFIDTags":null,"AssetId":"4109ba40-af78-486a-a40e-1d14a2d7b42f","Notes":null,"Manufacturer":null,"DepartmentId":null,"Department":null,"SupplierId":null,"Supplier":null},{"AssetName":"201","AssetNumber":"201","Classification":null,"ParentAsset":null,"SerialNumber":"2011","ParentCompany":"JPL Holdings","Barcode":null,"RFIDTags":null,"AssetId":"3e552280-16df-4c17-a4a5-1f61c4c96835","Notes":null,"Manufacturer":null,"DepartmentId":null,"Department":null,"SupplierId":null,"Supplier":null}]

At this line List<string> mystring = json.Deserialize<List<string>>(data); am getting 

{"No parameterless constructor defined for type of 'System.String[]'."}

even i tried like this

 [Serializable]
public class GetUser
{
    public GetUserdata[] Data { get; set; }
}

[Serializable]
public class GetUserdata
{
    public string AssetName { get; set; }
    public string AssetNumber { get; set; }
    public string Classification { get; set; }
    public string ParentAsset { get; set; }
    public string SerialNumber { get; set; }
    public string ParentCompany { get; set; }
    public string Barcode { get; set; }
    public string RFIDTags { get; set; }
    public string AssetId { get; set; }
    public string Notes { get; set; }
    public string Manufacturer { get; set; }
    public string DepartmentId { get; set; }
    public string Department { get; set; }
    public string SupplierId { get; set; }
    public string Supplier { get; set; }
}

controller

 public ActionResult SaveAssociate(string data)
    {
        JavaScriptSerializer json = new JavaScriptSerializer();
        GetUser mystring = json.Deserialize<GetUser>(data);
        return Content("Hai");
    }

Am getting error Type 'AssetTrackingSystem.Model.GetUser' is not supported for deserialization of an array.

Help me

Upvotes: 0

Views: 9162

Answers (1)

user3383479
user3383479

Reputation:

Instead of the above code, could you try:

 public ActionResult SaveAssociate(string data)
 {
    JavaScriptSerializer json = new JavaScriptSerializer();
    GetUserdata[] myUsers = json.Deserialize<GetUserdata[]>(data);
    return Content("Hai");
  }

Because your Json is sent as an array of object not an object of array. I hope it will help you.

Upvotes: 1

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