So I have this JSON file. I want to get the data out of it in C#.
{
"Server": [
{
"Name": "Server1",
"AvgTemp": 36,
"CurTemp": 50.3,
"MaxTemp": 41,
"MinTemp": 37
},
{
"Name": "Server2",
"AvgTemp": 36,
"CurTemp": 50.3,
"MaxTemp": 41,
"MinTemp": 41
},
{
"Name": "Server3",
"AvgTemp": 36,
"CurTemp": 50.3,
"MaxTemp": 41,
"MinTemp": 36
},
{
"Name": "Server4",
"AvgTemp": 36,
"CurTemp": 50.3,
"MaxTemp": 41,
"MinTemp": 41.3
}
]
}
I already tried this:
public ReadJson()
{
//prevents the threads to block each other while accessing the json file
using (var file = new FileStream("E:\Programming\Timmermann00\Betrieblicher_Auftrag\JSON\Values.json", FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
using (StreamReader r = new StreamReader(file))
{
string json = r.ReadToEnd();
//Testing
List<Values> values = JsonConvert.DeserializeObject<List<Values>>(json);
}
}
public class Values : INotifyPropertyChanged
{
public Values()
{
}
string Name { get; set; }
string avgTemp;
public string AvgTemp { get => avgTemp; set
{
if(avgTemp!= value)
{
avgTemp = value;
this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(AvgTemp)));
}
}
}
string maxTemp;
public string MaxTemp { get => maxTemp; set
{
if(maxTemp != value)
{
maxTemp = value;
this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(MaxTemp)));
}
}
}
string minTemp;
public string MinTemp
{
get => minTemp; set
{
if (minTemp != value)
{
minTemp= value;
this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(MinTemp)));
}
}
}
string curTemp;
public string CurTemp
{
get => curTemp; set
{
if (curTemp != value)
{
curTemp = value;
this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CurTemp)));
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
}
I get an error that says that my JSON file doesn’t have any arrays in it so it can’t convert into a List. Error message:
Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type ‘System.Collections.Generic.List`1[Betrieblicher_Auftrag.Values]’ because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly.
What is wrong?
2
Answers
You need a
Root
class for the deserialization.And deserialize as
Root
instance.Working code.
can you try with this.