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I need to deserialize the this json returned from grogle maps api:
{
"destination_addresses": [
"Via Medaglie D'Oro, 10, 47121 Forlì FC, Italia",
"Via Torino, 20123 Milano, Italia",
"Via Guglielmo Marconi, 71, 40121 Bologna, Italia",
"Via Irnerio, 40126 Bologna, Italia"
],
"origin_addresses": [
"Via Medaglie D'Oro, 10, 47121 Forlì FC, Italia",
"Via Torino, 20123 Milano, Italia",
"Via Guglielmo Marconi, 71, 40121 Bologna, Italia",
"Via Irnerio, 40126 Bologna, Italia"
],
"rows": [
{
"elements": [
{
"distance": {
"text": "1 m",
"value": 0
},
"duration": {
"text": "1 min",
"value": 0
},
"status": "OK"
},
{
"distance": {
"text": "286 km",
"value": 286281
},
"duration": {
"text": "2 ore 48 min",
"value": 10083
},
"status": "OK"
},
{
"distance": {
"text": "80,1 km",
"value": 80088
},
"duration": {
"text": "1 ora 3 min",
"value": 3789
},
"status": "OK"
},
{
"distance": {
"text": "77,6 km",
"value": 77594
},
"duration": {
"text": "57 min",
"value": 3422
},
"status": "OK"
}
]
},
{
"elements": [
{
"distance": {
"text": "288 km",
"value": 287811
},
"duration": {
"text": "2 ore 48 min",
"value": 10052
},
"status": "OK"
},
{
"distance": {
"text": "1 m",
"value": 0
},
"duration": {
"text": "1 min",
"value": 0
},
"status": "OK"
},
{
"distance": {
"text": "212 km",
"value": 212423
},
"duration": {
"text": "2 ore 8 min",
"value": 7664
},
"status": "OK"
},
{
"distance": {
"text": "218 km",
"value": 218219
},
"duration": {
"text": "2 ore 9 min",
"value": 7740
},
"status": "OK"
}
]
},
{
"elements": [
{
"distance": {
"text": "78,5 km",
"value": 78528
},
"duration": {
"text": "56 min",
"value": 3346
},
"status": "OK"
},
{
"distance": {
"text": "212 km",
"value": 212190
},
"duration": {
"text": "2 ore 5 min",
"value": 7519
},
"status": "OK"
},
{
"distance": {
"text": "1 m",
"value": 0
},
"duration": {
"text": "1 min",
"value": 0
},
"status": "OK"
},
{
"distance": {
"text": "2,0 km",
"value": 1979
},
"duration": {
"text": "5 min",
"value": 316
},
"status": "OK"
}
]
},
{
"elements": [
{
"distance": {
"text": "74,7 km",
"value": 74719
},
"duration": {
"text": "55 min",
"value": 3278
},
"status": "OK"
},
{
"distance": {
"text": "218 km",
"value": 217951
},
"duration": {
"text": "2 ore 9 min",
"value": 7712
},
"status": "OK"
},
{
"distance": {
"text": "3,8 km",
"value": 3782
},
"duration": {
"text": "11 min",
"value": 671
},
"status": "OK"
},
{
"distance": {
"text": "1 m",
"value": 0
},
"duration": {
"text": "1 min",
"value": 0
},
"status": "OK"
}
]
}
],
"status": "OK"
}
I need to create a Distance Matrix so I'm only interested in the "value" field inside "distance".
I've tried this approach:
DataSet data = JsonConvert.DeserializeObject<DataSet>(jsonResponse);
DataTable dataTab = data.Tables["Elements"];
foreach (DataRow elements in dataTab.Rows)
{
Console.WriteLine(elements["distance"]);
//Do something else here
}
But The JSonConvert returns "Additional text found in JSON string after finishing deserializing object."
689
Json to Deserialize a Complex Json. When we are using a framework version earlier than . NET 3.0, it is recommended to use Newtonsoft. Json to serialize and deserialize objects.
A common way to deserialize JSON is to first create a class with properties and fields that represent one or more of the JSON properties. Then, to deserialize from a string or a file, call the JsonSerializer. Deserialize method.
The process whereby a lower-level format (e.g. that has been transferred over a network, or stored in a data store) is translated into a readable object or other data structure. In JavaScript, for example, you can deserialize a JSON string to an object by calling the function JSON.
Json structure is made up with {}, [], comma, colon and double quotation marks and it includes the following data types: Object, Number, Boolean, String, and Array. Serialize means convert an object instance to an XML document. Deserialize means convert an XML document into an object instance.
You should deserialize to classes that match your data. You can generate these classes at http://json2csharp.com/.
// use like
var rootObj = JsonConvert.DeserializeObject<RootObject>(jsonResponse);
foreach (var row in rootObj.rows)
{
foreach (var element in row.elements)
{
Console.WriteLine(element.distance.text);
}
}
// you might want to change the property names to .Net conventions
// use [JsonProperty] to let the serializer know the JSON names where needed
public class Distance
{
public string text { get; set; }
public int value { get; set; }
}
public class Duration
{
public string text { get; set; }
public int value { get; set; }
}
public class Element
{
public Distance distance { get; set; }
public Duration duration { get; set; }
public string status { get; set; }
}
public class Row
{
public List<Element> elements { get; set; }
}
public class RootObject
{
public List<string> destination_addresses { get; set; }
public List<string> origin_addresses { get; set; }
public List<Row> rows { get; set; }
public string status { get; set; }
}
I believe the issue is with the cast to 'DataSet' based on a similar question I found searching Stack Overflow.
Try this as I believe it would work (you may need to use 'rows' instead of 'Elements', but I believe the approach of using a JObject will resolve the primary issue of the 'additional text'.
JObject json = JsonConvert.DeserializeObject<JObject>(jsonResponse);
foreach (Dictionary<string, object> item in data["Elements"])
{
foreach (string val in item.Values) {
Console.WriteLine(val);
}
}
Using dynamic :
dynamic json = JsonConvert.DeserializeObject(jsonResponse);
var rowCount = json.rows.Count;
Func<dynamic, int> getElementCount = r => r.elements.Count;
var maxElements = Enumerable.Max(json.rows, getElementCount);
var matrix = new int?[rowCount, maxElements];
for(int i = 0; i < rowCount; i++)
{
var elements = json.rows[i].elements;
for(int j = 0; j < elements.Count; j++)
{
var element = elements[j];
matrix[i, j] = element.distance.value;
}
}
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