Convert a Json string to C# class object

Question

I have a json string like {field:'DateToEnd',dir:'asc'}

And i have a class in c# with following two properties.

public class SortDescriptor
{
    public SortDescriptor()
    {
    }
    public string Field { get; set; }
    public string Dir { get; set; }
}

Now i want to convert this string to the class object so that i can access the properties.

I tried the following example. But it's not working for me.

JavaScriptSerializer serialize = new JavaScriptSerializer();
SortDescriptor sort = (SortDescriptor)serialize.DeserializeObject(fixSortString);

It gives following error:

Unable to cast object of type 'System.Collections.Generic.Dictionary`2[System.String,System.Object]' to type 'NF.Common.SortDescriptor'.

Can anyone let me know that how i can do this?

Use json.net from nuget (newtonsoft.json) – deeiip Mar 24 '16 at 06:49 — deeiip, Mar 24 '16 at 06:49
`serialize.Deserialize(fixSortString);` – Gene R Mar 24 '16 at 06:53 — Gene R, Mar 24 '16 at 06:53
@JeremyThompson I have edited my question. – Code Rider Mar 24 '16 at 06:55 — Code Rider, Mar 24 '16 at 06:55
@GeneR It works for me. Thanks. – Code Rider Mar 24 '16 at 06:58 — Code Rider, Mar 24 '16 at 06:58
That's my 2nd answer – Jeremy Thompson Mar 24 '16 at 07:00 — Jeremy Thompson, Mar 24 '16 at 07:00

score 0 · Accepted Answer · answered Mar 24 '16 at 06:52

I'm pretty sure DeserializeObject requires a type as a second parameter, eg

JavaScriptSerializer serialize = new JavaScriptSerializer();
SortDescriptor sort = (SortDescriptor)serialize.DeserializeObject(fixSortString, typeof(SortDescriptor));

Or using Generics:

JavaScriptSerializer serialize = new JavaScriptSerializer(); 
SortDescriptor sort = (SortDescriptor)serialize.DeserializeObject<SortDescriptor>(fixSortString);

Convert a Json string to C# class object

1 Answers1