I am trying to deserialize JSON data to a dataset - c#
I thought JSON was supposed to be easy to use.
I have a C# .NET Windows form program in Visual Studio 2015 being used as a client consuming a Web API 2 remote server with RestSharp as the HTTP client.
the data returned from the API call is in Json format. However, when I try to deserialize the returned Json into a dataset using this statement:
DataSet data = (DataSet)JsonConvert.DeserializeObject(response.Content, (typeof(DataSet))); ,
I get this error:
"Unexpected JSON token while reading DataTable: EndArray".
If I use the text from "response.Content" and validate it here: http://www.jsonlint.com/#, the results says "Valid JSON".
When I use the debugger to view the "response.Content" as Json, it shows the correct records that I am looking for.
I have tried different formats of JsonConvert, such as:
DataSet data = JsonConvert.DeserializeObject<DataSet>(response.Content);
DataTable datat = (DataTable)JsonConvert.DeserializeObject(response.Content, (typeof(DataTable)));
I also tried this:
XmlDocument xd1 = new XmlDocument();
xd1 = (XmlDocument)JsonConvert.DeserializeXmlNode(response.Content, "RootObject");
DataSet dataset = new DataSet();
dataset.ReadXml(new XmlNodeReader(xd1));
which I got from here: http://www.c-sharpcorner.com/blogs/how-to-parse-json-string-to-dataset-in-c-sharp1
That seems to work without giving an error, but the dataset contains four tables ( RootObject, data, CustomerRoles and ShoppingCartitems).
I tried removing three of the tables, but there are constraints and foreignkeys that I don't know how to remove and it won't allow me to remove the tables until I remove the constraints. If I try to remove the constraints, it gives this error: "Cannot remove unique constraint 'Constraint1'. Remove foreign key constraint 'RootObject_data' first."
Does anybody know how to use the "easy to use", "most popular" JSON format to deserialize my Json data into a dataset and come out with one table of data?
JSON data
{
"success": true,
"data": [{
"Id": 6,
"CustomerGuid": "70b390d8-82d5-4bba-aa68-fc8268a1b1ff",
"UserName": "victoria_victoria#nopCommerce.com",
"Email": "victoria_victoria#nopCommerce.com",
"CustomerRoles": [{
"Id": 3,
"Name": "Registered",
"SystemName": "Registered"
}],
"AdminComment": null,
"IsTaxExempt": false,
"AffiliateId": 0,
"VendorId": 0,
"HasShoppingCartItems": false,
"Active": false,
"Deleted": false,
"IsSystemAccount": false,
"SystemName": null,
"LastIpAddress": null,
"CreatedOnUtc": "\/Date(1472933472393)\/",
"LastLoginDateUtc": null,
"LastActivityDateUtc": "\/Date(1472933472393)\/",
"ExternalAuthenticationRecords": [],
"ShoppingCartItems": []
}, {
"Id": 5,
"CustomerGuid": "eb9e6f24-f362-4c10-942a-366e2919dc11",
"UserName": "brenda_lindgren#nopCommerce.com",
"Email": "brenda_lindgren#nopCommerce.com",
"CustomerRoles": [{
"Id": 3,
"Name": "Registered",
"SystemName": "Registered"
}],
"AdminComment": null,
"IsTaxExempt": false,
"AffiliateId": 0,
"VendorId": 0,
"HasShoppingCartItems": false,
"Active": false,
"Deleted": false,
"IsSystemAccount": false,
"SystemName": null,
"LastIpAddress": null,
"CreatedOnUtc": "\/Date(1472933472363)\/",
"LastLoginDateUtc": null,
"LastActivityDateUtc": "\/Date(1472933472363)\/",
"ExternalAuthenticationRecords": [],
"ShoppingCartItems": []
}, {
"Id": 4,
"CustomerGuid": "9f46dbae-6942-410c-90b8-9b38a0890064",
"UserName": "james_pan#nopCommerce.com",
"Email": "james_pan#nopCommerce.com",
"CustomerRoles": [{
"Id": 3,
"Name": "Registered",
"SystemName": "Registered"
}],
"AdminComment": null,
"IsTaxExempt": false,
"AffiliateId": 0,
"VendorId": 0,
"HasShoppingCartItems": false,
"Active": false,
"Deleted": false,
"IsSystemAccount": false,
"SystemName": null,
"LastIpAddress": null,
"CreatedOnUtc": "\/Date(1472933472317)\/",
"LastLoginDateUtc": null,
"LastActivityDateUtc": "\/Date(1472933472317)\/",
"ExternalAuthenticationRecords": [],
"ShoppingCartItems": []
}, {
"Id": 3,
"CustomerGuid": "6277386b-13ee-427b-9cfe-4ebfa487c340",
"UserName": "arthur_holmes#nopCommerce.com",
"Email": "arthur_holmes#nopCommerce.com",
"CustomerRoles": [{
"Id": 3,
"Name": "Registered",
"SystemName": "Registered"
}],
"AdminComment": null,
"IsTaxExempt": false,
"AffiliateId": 0,
"VendorId": 0,
"HasShoppingCartItems": false,
"Active": false,
"Deleted": false,
"IsSystemAccount": false,
"SystemName": null,
"LastIpAddress": null,
"CreatedOnUtc": "\/Date(1472933472253)\/",
"LastLoginDateUtc": null,
"LastActivityDateUtc": "\/Date(1472933472253)\/",
"ExternalAuthenticationRecords": [],
"ShoppingCartItems": []
}, {
"Id": 2,
"CustomerGuid": "241f45f1-b38c-4e22-8c5a-743fa3276620",
"UserName": "steve_gates#nopCommerce.com",
"Email": "steve_gates#nopCommerce.com",
"CustomerRoles": [{
"Id": 3,
"Name": "Registered",
"SystemName": "Registered"
}],
"AdminComment": null,
"IsTaxExempt": false,
"AffiliateId": 0,
"VendorId": 0,
"HasShoppingCartItems": false,
"Active": false,
"Deleted": false,
"IsSystemAccount": false,
"SystemName": null,
"LastIpAddress": null,
"CreatedOnUtc": "\/Date(1472933472207)\/",
"LastLoginDateUtc": null,
"LastActivityDateUtc": "\/Date(1472933472207)\/",
"ExternalAuthenticationRecords": [],
"ShoppingCartItems": []
}, {
"Id": 1,
"CustomerGuid": "a940dc03-5f52-47d2-9391-8597b3b31cf2",
"UserName": "tony#lakesideos.com",
"Email": "tony#lakesideos.com",
"CustomerRoles": [{
"Id": 1,
"Name": "Administrators",
"SystemName": "Administrators"
}, {
"Id": 2,
"Name": "Forum Moderators",
"SystemName": "ForumModerators"
}, {
"Id": 3,
"Name": "Registered",
"SystemName": "Registered"
}],
"AdminComment": null,
"IsTaxExempt": false,
"AffiliateId": 0,
"VendorId": 0,
"HasShoppingCartItems": true,
"Active": true,
"Deleted": false,
"IsSystemAccount": false,
"SystemName": null,
"LastIpAddress": "71.185.255.7",
"CreatedOnUtc": "\/Date(1472933470783)\/",
"LastLoginDateUtc": "\/Date(1477522483903)\/",
"LastActivityDateUtc": "\/Date(1477523996553)\/",
"ExternalAuthenticationRecords": [],
"ShoppingCartItems": [{
"Id": 1,
"StoreId": 1,
"ShoppingCartTypeId": 1,
"CustomerId": 1,
"ProductId": 18,
"AttributesXml": null,
"CustomerEnteredPrice": 0.0000,
"Quantity": 1,
"CreatedOnUtc": "\/Date(1473801903447)\/",
"UpdatedOnUtc": "\/Date(1473803336207)\/",
"IsFreeShipping": false,
"IsShipEnabled": true,
"AdditionalShippingCharge": 0.0000,
"IsTaxExempt": false
}]
}]
}
Here's a brief overview of what you need to do.
Taking from NewtonSoft - Deserialize Object example
Snippet of your data
{
"Id": 1,
"CustomerGuid": "a940dc03-5f52-47d2-9391-8597b3b31cf2",
"UserName": "tony#lakesideos.com",
"Email": "tony#lakesideos.com"
This is a Customer object. It needs it's own C# model class.
public class Customer {
int id;
string guid;
string username;
string email;
// etc...
// getters and setters...
}
This is stored in a list of data
"data": [ { ... }, { ... } ]
You need another Object to hold a list of those objects plus a boolean success value. Let's call this one Response.
{
"success": true,
"data": [{
That class starts with
public class Response {
bool success;
IList<Customer> data;
Then, you need other lists and object classes for something like this
"CustomerRoles": [{
"Id": 3,
"Name": "Registered",
"SystemName": "Registered"
}],
Once you've modeled the entire domain of classes, you should be able to have
Response res = JsonConvert.DeserializeObject<Response>(json);
Since you seem to have already tried that, and are getting an error about the END_ARRAY character, something within your DataSet class is not correctly mapped to a List
And then get res.data to access the list of data, then you can loop over those Customer objects to build your Dataset / table objects, I assume to display your data in some list of the GUI
Try starting from Response.Data instead of Response.Content, that will get you one layer in to expose the actual data to deserialize.
For example:
var response = _requestProcessor.Process<Request, Response>(
new Request(id)).dataList;
return new JsonNetResult() { Data = response, JsonRequestBehavior= JsonRequestBehavior.AllowGet };
Whatever the Request object is, it has an object that holds the responses' data in it; that is the actual item to deserialize.
Perhaps what you need to do is what Cricket_007 suggests, and make a class to encapsulate the Success object returned in the JSON, then deserialize to one Success object and a Data object, which is a list of the objects you're trying to get to.
The steps you need to follow are:
Convert the whole JSON string to an object that consists of the two objects within, Success and Data.
JSONObject content = new JSONObject(Response.Content); perhaps, this is untested.
From that object, deserialize just the Data object within it.
content.data -or- content["data"]
or some such should get you to the parts you want to work with.
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