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NullReferences Exception

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Learn iOS Programming

NullReferences Exception

Joma Alrzini

6yAsked Oct 16, 2019, 6:42 AM691Learn iOS Programming

I got this error when I tried to run the good which gives and object reference not to an instance of an object

this is the code

string responseString = reader.ReadToEnd();
dynamic jsonData = JsonConvert.DeserializeObject(responseString);
var results = new List();
foreach (var item in jsonData.items)
{
results.Add(new Result
{
Title = item.title,
Link = item.link,
Snippet = item.snippet,
});
}

please kindly help

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Guest User6y ago
Accepted answer
Show the contents of responseString
Joma Alrzini6y ago
It still on the line foreach (var item in jsonData.items)
Guest User6y ago
If you debug, on what line is it crashing?

What exactly is in the JSON?
Joma Alrzini6y ago
Thanks

but it still giving the same error

and I got runtime binder Exception
Guest User6y ago
DeserializeObject can return null when responseString is empty or invalid, so then jsonData.items will not exist. Try the following:
string responseString = reader.ReadToEnd();
dynamic jsonData = JsonConvert.DeserializeObject(responseString);
var results = new List();
if (jsonData != null)
{
  foreach (var item in jsonData.items)
  {
    results.Add(new Result
    {
    Title = item.title,
    Link = item.link,
    Snippet = item.snippet
    });
  }
}