System.Text.Json cannot bind to fields #69936
Description
Description
When I have a type with a JsonConstructor and some fields, I cannot deserialize JSON to that type because an exception is thrown:
System.InvalidOperationException:
Each parameter in the deserialization constructor on type 'Steve'
must bind to an object property or field on deserialization.
Reproduction Steps
Run this test:
public class Steve
{
[JsonConstructor]
public Steve(string a, string b, string c)
{
A = a;
B = b;
C = c;
}
public string A {get;}
public string B {get; }
public string C;
}
[Fact]
public void SteveTest()
{
string json = @"{
""A"": ""a"",
""B"": ""b"",
""C"": ""c""
}";
JsonSerializer.Deserialize<Steve>(json);
}Expected behavior
Either:
- the field is bound to and no exception happens, or
- the exception message doesn't mention the word field
Actual behavior
An exception is thrown
Regression?
No response
Known Workarounds
No response
Configuration
No response
Other information
I discovered this issue while mimicking the behaviour of S.T.J in this Pull Request.
The PR is for adding binding to immutable types in System.Configuration.