How to check if json array is empty in c#?

Question

I'm calling Google Maps and use System.JSON to parse the object. I grab my object using:

double placeLat = json["results"][0]["geometry"]["location"]["lat"];

Then I want to check wheater the third objects exists and if yes perform some actions, but apparently the following fails. I know that Google Maps returns 2 objects in this case and I want to check for the third one to avoid performing actions on null and passing them further.. The following works fine when Google Maps returns 3 objects so I believe my condition is wrong.

if (json["results"][2] != null) {

        }

I get this error:

Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index

Any ideas of how to properly build the if statement in case using System.JSON?

Abhishek Kanrar · Accepted Answer · 2019-05-08 06:20:34Z

6

if(jsonobject.Count>0)
 {
 }

answered May 8, 2019 at 6:20

Abhishek Kanrar

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Comments

Saeed · Accepted Answer · 2016-05-21 19:28:43Z

4

If the results array only has two entries in it, then you can't access json["results"][2] because index 2 is outside the bounds of the array.

Before you access index 2, check json["results"].Count to make sure index 2 exists. You might need to cast it to JsonArray before you access the Count.

answered May 21, 2016 at 19:28

Saeed

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R2Psoft · Accepted Answer · 2020-05-07 13:21:54Z

-1

var response = await httpClient.PostAsync(uri, content);
                    var instituteDetails = await response.Content.ReadAsStringAsync();
                    **if (response.IsSuccessStatusCode && instituteDetails.Length>2)**
                    {
                        createModel = JsonConvert.DeserializeObject<IList<PaymentResponseDetailsModel>>(instituteDetails);
                        **if(createModel.Count()>0)**
                        {
                            return View(createModel);
                        }
                        else
                        {
                            return RedirectToAction("RegistrationInfo");
                        }
                       });                           
                    }

answered May 7, 2020 at 13:21

R2Psoft

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1 Comment

R2Psoft Over a year ago

if (response.IsSuccessStatusCode && instituteDetails.Length>2) and if(createModel.Count()>0) worked fine if you getting empty jsonstring and model .

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