How to serialize a color with Json?

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I have the following code, where I’m trying to serialize and deserialize a class that has two variables Color:

static void Main(string[] args)
{
    Color cor = Color.FromArgb(255, 255, 0, 0);
    Color cor2 = Color.FromArgb(255, 0, 0, 255);
    JavaScriptSerializer serial = new JavaScriptSerializer();
    string serializado = serial.Serialize(new cores() { corI=cor, corE=cor2 });
    cores teste = serial.Deserialize<cores>(serializado);
    Console.WriteLine(teste.corI + " - " + teste.corE);
}

class cores
{
    public Color corI { get; set; }
    public Color corE { get; set; }
}

However, the exit from this program is:

Color [Empty] - Color [Empty]

I mean, it didn’t work.

My question is, why does Json not work for Color? How to make it work?

c# json

  • It would not be easier just to save the color in Hex or RGB format in your Json structure?

  • Also, I don’t know if it is possible to get the same results by creating a structure, since Color is a structure and not a class. Anyway, take a look here to see if it helps you.

  • @Cat I already fixed it, I’m passing an array of integers. But I asked the question because it got me kind of stuck and I wanted to know why it didn’t work.

  • Do you have any reason to use the JavaScriptSerializer to serialize for json?

1 answer

1


Using the class JavaScriptSerializer the color is serialized, but when it comes to deserialize it cannot create the objects again, now using its own library to work with Json, the Color structure is built again. I have made the comparisons below:

Javascriptserializer

JavaScriptSerializer serial = new JavaScriptSerializer();
string serializado = serial.Serialize(new cores() { corI=cor, corE=cor2 });
Console.Write(serializado);

Exit:

{ "corI":{ "R":255, "G":0, "B":0, "A":255, "IsKnownColor":false, "IsEmpty":false, "IsNamedColor":false, "IsSystemColor":false, "Name":"ffff0000" }, "corE":{ "R":0, "G":0, "B":255, "A":255, "IsKnownColor":false, "IsEmpty":false, "IsNamedColor":false, "IsSystemColor":false, "Name":"ff0000ff" } }

Performing

cores teste = serial.Deserialize<cores>(serializado);
Console.WriteLine(teste.corI + " - " + teste.corE);

Exit:

The JavaScriptSerializer failed to build the object again

Color [Empty] - Color [Empty]

Newtonsoft.Json

Now using a class that works with Json, in case I used the Newtonsoft.Json library, the result is different:

string serializado = JsonConvert.SerializeObject(new cores() { corI = cor, corE = cor2 });
Console.Write(serializado);

Exit

Exit is much simpler

{"Cori":"255, 0, 0","core":"0, 0, 255"}

Performing

cores teste = JsonConvert.DeserializeObject<cores>(serializado);
Console.WriteLine(teste.corI + " - " + teste.corE);

Exit

He can reconstruct the object.

Color [Red] - Color [Blue]

Completion

I don’t know why you are using this class, but it seems to me not a good option, when you just want to turn an object into a string, I recommend you to use one of the Json libraries, which are optimized and suitable for this.

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