I am using Newtonsoft.dll and this is the scenario,
List<int> listNumbers = new List<int>() { 1, 2, 3, 4, 5};
var result = JsonConvert.SerializeObject(listNumbers);
the result is ,
[1,2,3,4,5]
But I want the following type of result,
[{"cardvalue":1},{"cardvalue":2},{"cardvalue":3},{"cardvalue":4},{"cardvalue":5}]
How can I do this ?
Try-
var result = listNumbers.Select(a => new
{
cardvalue = a
});
var jsonResult = JsonConvert.SerializeObject(result);
or serialize result directly -
var result = JsonConvert.SerializeObject(listNumbers.Select(a => new
{
cardvalue = a
}));
Related
I want to convert a string to multi-level list, but I cannot find a efficient way to do.
From String:
[[1,2,3],[1,2]]
To List:
List< List < int>>
Try this as a funtion
List<List<int>> convert(String val){
List<List<int>> list = [];
jsonDecode(val).forEach((mainList) {
List<int> subList = [];
mainList.forEach((sList) {
subList.add(sList);
});
list.add(subList);
});
return list;
}
Also import dart:convert;
String str = '[[1,2,3],[1,2]]';
List<List<int>> list=[];
for(String s in str.split('],[')){
List<int> l = [];
String formattedString = s.replaceAll('[','').replaceAll(']','');
for(String innerS in formattedString.split(',')){
l.add(int.parse(innerS));
print(l);
}
list.add(l);
}
Output: [[1, 2, 3], [1, 2]]
Shorter version:
import 'dart:convert';
void main() {
var jsonMap = "[[1,2,3],[1,2]]";
List<List<int>> items = (jsonDecode(jsonMap) as List).map((lst) =>
(lst as List).map((i) => (i as int)).toList()).toList();
print(items);
}
I'm trying to get datatypes of a JSON.stringify to compare them.
I had used:
var id = d.patogeno;
alert(id);
But it tell the alert that is not defined.
I got this database:
var IDData = JSON.stringify([
["node/9837102", "node/26794", "Customer", "patongenoA", "1412451.0", 3, 520, "1412381"],
["node/9837102", "node/44210", "Customer", "patongenoB", "1436765.0", 2, 384, "1436693"],
]);
and the following function:
function createNodes(startnodes, endnodes, startnodetype, endnodetype, PayTime, TXN_COUNT, Total_Amt, SendTime) {
var node_set = new Set();
var links = [];
var nodetype = d3.set();
startnodes.forEach(function(src, i) {
var tgt = endnodes[i];
node_set.add({
id: src,
type: startnodetype[i]
});
node_set.add({
id: tgt,
type: endnodetype[i]
});
links.push({
source: src,
target: tgt,
paytime: PayTime[i],
patogeno: TXN_COUNT[i], // cambio ---- variable con cual trabajar
total_amt: Total_Amt[i],
SendTime: SendTime[i],
value: 1
});
});
I need to know the value of every patogeno and return it to compare it. Is there a way to do it?, or How to return a specific value, for example: "patogenoB" from IDData?
First, JSON.stringify produces a string.
const obj = {example: 5}
const str = JSON.stringify(obj)
console.log(typeof str) // 'string'
If you want an addressable object, you would do the reverse to a string:
const str = '{"example": 5}'
const obj = JSON.parse(str)
console.log(obj.example) // 5
I do not know how to answer your question with respect to JSON.stringify, nor do I understand why you would be turning an array of arrays into a string instead of converting them into addressable objects, but at the very end of createNodes, you would be able to do this:
links.forEach((d) => console.log(d.patogeno))
I'm trying to add to the JsonResult object a parsed Json string, but I couldn't do it, the parser object in the browser is shown as:
"filter":[[[]],[[[],[]]]]
This is the full code
public JsonResult AjaxStandardGet(int id)
{
Standard ec = db.Standard.FirstOrDefault(s => s.IdStandard == id);
// inside filter: { "KeyDynamic1": "Value1", "KeyDynamic2": [ "AAA", "DDD"] }
var filter = JsonConvert.DeserializeObject(ec.Filter);
return Json(new
{
ec.IdStandard,
ec.Description,
filter,
ec.Observations,
Services = ec.StandardServices.Select(s => new {
s.IdStandardServices,
Tecnology = s.Tecnology?.Nombre,
ServiceType = s.ServiceType?.Description,
s.Quantity,
s.Cost,
Options = (!string.IsNullOrEmpty(s.Options) ? s.Options.Split(',') : null),
Total = s.Quantity * s.Cost
}),
Success = true
});
}
I can't create the model object because the filters are not allways the same.
I tried this:
Dictionary<string, object> filter = JsonConvert.DeserializeObject<Dictionary<string, object>>(ec.Filter);
And I get
"filter":{"KeyDynamic1":"Value1","KeyDynamic2":[[],[]]}
I suggest you to JToken or dynamic:
JToken filter = JToken.Parse(ec.Filter);
dynamic filter = JsonConvert.DeserializeObject<dynamic>(ec.Filter);
Here is working fiddle.
Update
It seems that JavaScriptSerializer is not able to do it. So you can serialize your result using Newtonsoft.Json and return it as a string:
var result = new
{
ec.IdStandard,
ec.Description,
filter,
ec.Observations,
Services = ec.StandardServices.Select(s => new {
s.IdStandardServices,
Tecnology = s.Tecnology?.Nombre,
ServiceType = s.ServiceType?.Description,
s.Quantity,
s.Cost,
Options = (!string.IsNullOrEmpty(s.Options) ? s.Options.Split(',') : null),
Total = s.Quantity * s.Cost
}),
Success = true
};
var json = JsonConvert.SerializeObject(result);
return Content(json, "application/json");
I am developing a ASP.NET MVC Web Api. Project. I am returning data with JSON format. Before I return data to user I serialize data using JsonConvert.SerializeObject to change their json property names.My code return data in JSON format. But with an issue. That is it always return data into string even if the data is array or object.
This is my action method that returns json.
public HttpResponseMessage Get()
{
IEnumerable<Region> dbRegions = regionRepo.GetCachedRegions();
List<ContentRegion> regions = new List<ContentRegion>();
if(dbRegions!=null && dbRegions.Count()>0)
{
foreach(var region in dbRegions)
{
ContentRegion contentRegion = new ContentRegion
{
Id = region.Id,
ImageUrl = Url.AbsoluteContent(region.ImagePath),
SmallImageUrl = (String.IsNullOrEmpty(region.ImagePath))?null:Url.AbsoluteContent(CommonHelper.GetImageUrl(region.ImagePath,AppConfig.SmallThumbSuffix)),
MediumImageUrl = (String.IsNullOrEmpty(region.ImagePath))?null:Url.AbsoluteContent(CommonHelper.GetImageUrl(region.ImagePath,AppConfig.MediumThumbSuffix)),
Name = region.Name,
MmName = region.MmName,
Description = region.Description,
MmDescription = region.MmDescription,
Latitude = region.Latitude,
Longitude = region.Longitude
};
regions.Add(contentRegion);
}
}
string json = JsonConvert.SerializeObject(regions);
if(!string.IsNullOrEmpty(json))
{
json = json.Trim(new char[] { '"' });
}
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new ObjectContent(json.GetType(),json,Configuration.Formatters.JsonFormatter)
};
}
Actually this code should return Json array. But when I parse data from client (from Android using Volley). It cannot be parsed into Json Array.
This is the data I get:
As you can see the double quote both in the beginning and at the end. The reason I cannot parse it into array in Volley is it is returning as a string because of that double. How can I serialize it trimming that quote? I used trim, but not removed.
You are unnecessarily complicating things. In Web API you can return JSON just by returning any object inside the built-in methods, the framework will serialize it for you.
public IHttpActionResult Get()
{
IEnumerable<Region> dbRegions = regionRepo.GetCachedRegions();
List<ContentRegion> regions = new List<ContentRegion>();
if(dbRegions != null && dbRegions.Count() > 0) {
foreach(var region in dbRegions)
{
ContentRegion contentRegion = new ContentRegion
{
Id = region.Id,
ImageUrl = Url.AbsoluteContent(region.ImagePath),
SmallImageUrl = (String.IsNullOrEmpty(region.ImagePath))?null:Url.AbsoluteContent(CommonHelper.GetImageUrl(region.ImagePath,AppConfig.SmallThumbSuffix)),
MediumImageUrl = (String.IsNullOrEmpty(region.ImagePath))?null:Url.AbsoluteContent(CommonHelper.GetImageUrl(region.ImagePath,AppConfig.MediumThumbSuffix)),
Name = region.Name,
MmName = region.MmName,
Description = region.Description,
MmDescription = region.MmDescription,
Latitude = region.Latitude,
Longitude = region.Longitude
};
regions.Add(contentRegion);
}
}
return Ok(regions);
}
As an aside: from what I can see you are mapping manually your domain objects into DTOs: take into consideration the use of an automatic mapping mechanism like AutoMapper.
I am not sure this is the best solution or not. I solved the problem using this way.
This is my action method
public HttpResponseMessage Get()
{
try
{
IEnumerable<Region> dbRegions = regionRepo.GetCachedRegions();
List<ContentRegion> regions = new List<ContentRegion>();
if (dbRegions != null && dbRegions.Count() > 0)
{
foreach (var region in dbRegions)
{
ContentRegion contentRegion = new ContentRegion
{
Id = region.Id,
ImageUrl = Url.AbsoluteContent(region.ImagePath),
SmallImageUrl = (String.IsNullOrEmpty(region.ImagePath)) ? null : Url.AbsoluteContent(CommonHelper.GetImageUrl(region.ImagePath, AppConfig.SmallThumbSuffix)),
MediumImageUrl = (String.IsNullOrEmpty(region.ImagePath)) ? null : Url.AbsoluteContent(CommonHelper.GetImageUrl(region.ImagePath, AppConfig.MediumThumbSuffix)),
Name = region.Name,
MmName = region.MmName,
Description = region.Description,
MmDescription = region.MmDescription,
Latitude = region.Latitude,
Longitude = region.Longitude
};
regions.Add(contentRegion);
}
}
string json = JsonConvert.SerializeObject(regions);
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(json, Encoding.Default, "application/json")
};
}
catch
{
return Request.CreateResponse(HttpStatusCode.InternalServerError);
}
}
It's not required to convert object to json string.
You can try :
return Request.CreateResponse<List<ContentRegion>>(HttpStatusCode.OK,regions);
Not tested.
config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));
Use this line in your WebApiConfig.
And here your code should be
public HttpResponseMessage Get()
{
IEnumerable<Region> dbRegions = regionRepo.GetCachedRegions();
List<ContentRegion> regions = new List<ContentRegion>();
HttpResponseMessage temp = ControllerContext.Request.CreateResponse(HttpStatusCode.OK, "");
if (dbRegions != null && dbRegions.Count() > 0)
{
foreach (var region in dbRegions)
{
ContentRegion contentRegion = new ContentRegion
{
Id = region.Id,
ImageUrl = Url.AbsoluteContent(region.ImagePath),
SmallImageUrl = (String.IsNullOrEmpty(region.ImagePath)) ? null : Url.AbsoluteContent(CommonHelper.GetImageUrl(region.ImagePath, AppConfig.SmallThumbSuffix)),
MediumImageUrl = (String.IsNullOrEmpty(region.ImagePath)) ? null : Url.AbsoluteContent(CommonHelper.GetImageUrl(region.ImagePath, AppConfig.MediumThumbSuffix)),
Name = region.Name,
MmName = region.MmName,
Description = region.Description,
MmDescription = region.MmDescription,
Latitude = region.Latitude,
Longitude = region.Longitude
};
regions.Add(contentRegion);
}
}
temp = ControllerContext.Request.CreateResponse(HttpStatusCode.OK, regions);
return temp;
//string json = JsonConvert.SerializeObject(regions);
//if (!string.IsNullOrEmpty(json))
//{
// json = json.Trim(new char[] { '"' });
//}
//return new HttpResponseMessage(HttpStatusCode.OK)
//{
// Content = new ObjectContent(json.GetType(), json, Configuration.Formatters.JsonFormatter)
//};
}
I have one dropdown in the table.Once I make Onchange event I got all the table value and I want to convert it into json to send it to the servlet.
var item = [];
function dropDownOnChange(e) {
var selectedValue = e.options[e.selectedIndex].value;
alert("selectedValue:" + selectedValue);
var currentRow= $(e).closest("tr");
var AccountNo = $("td:eq(0)",$(currentRow)).text();
alert("accountno"+AccountNo);
var AccountType =$("td:eq(1)",$(currentRow)).text();
alert("acctyp"+AccountType);
var AcctypID = $("td:eq(3)",$(currentRow)).text();
alert("accID"+AcctypID);
Here I tried to convert it to JSON. I want to send this JSON value on my final save.
var objddlvalue = {};
objddlvalue["AccountNo"] = AccountNo;
objddlvalue["AccountType"] = AccountType;
objddlvalue["Account Type_Val"] = AcctypID;
objddlvalue["AccountStatus"] = selectedValue;
item.push(objddlvalue);
console.log(item);
jsonObj1 = JSON.stringify(item);
console.log(jsonObj1);
I am getting my JSON value like:
[{
"AccountNo": "89348734",
"AccountType": "Credit",
"Account Type_Val": "21",
"AccountStatus": "Invalid"
}]
When I check on online JSON checker it says the format is correct. But when I access it form servlet I can not parse it to jarray.
JSONObject jsonObj1 = (JSONObject)JSONValue.parse(request.getParameter("jsondata1"));
System.out.println("Json Object........"+jsonObj1.toJSONString());
JSONArray arr = (JSONArray) jsonObj.get(jsonObj1);
How to loop through my JSON object?
public static void main(String[] args) {
String jsonExternal = "[" +
"{"+
"\"AccountNo\": \"89348734\","+
"\"AccountType\": \"Credit\","+
"\"Account Type_Val\": \"21\","+
"\"AccountStatus\": \"Invalid\""+
"},"+
"{"+
"\"AccountNo\": \"89348734_test\","+
"\"AccountType\": \"Credit_test\","+
"\"Account Type_Val\": \"21_test\","+
"\"AccountStatus\": \"Invalid_test\""+
"}]";
JSONArray arr = (JSONArray)JSONValue.parse(jsonExternal);
for(Object obj : arr) {
JSONObject jsonObj = (JSONObject)obj;
Collection keySet = jsonObj.keySet();
Collection entrySet = jsonObj.entrySet();
Collection values = jsonObj.values();
for(Object o : keySet) {
System.out.println(o.toString());
}
for(Object o : entrySet) {
System.out.println(o.toString());
}
for(Object o : values) {
System.out.println(o.toString());
}
System.out.println(jsonObj.get("AccountNo"));
System.out.println(jsonObj.get("AccountType"));
System.out.println(jsonObj.get("Account Type_Val"));
System.out.println(jsonObj.get("AccountStatus"));
}
}