Json on bradleycarey.com

System.Text.Json.Serialization - Read Numbers from JSON strings

Thu, 17 Sep 2020 00:00:00 +0000

Lets say you are POSTing a json that looks like this:

{
  "someNumber": "123"
}

…to a server-side web api DTO that looks like this:

public class Stuff
{
    public int? SomeNumber { get; set; }
}

This thing will fail since the number in the json is quoted. It looks like System.Text.Json is adding JsonNumberHandling.AllowReadingFromString which will accomplish this once .NET 5.0 is finally released.

In the meantime, I wrote a custom converter which works with nullable ints.

StringJsonConverter.cs Link to heading

public class StringJsonConverter : JsonConverter<int?>
{
    public override int? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        return reader.TokenType switch
        {
            JsonTokenType.Number => reader.GetInt32(),
            JsonTokenType.Null => null,
            JsonTokenType.String => int.TryParse(reader.GetString(), out var parsed) ? parsed : (int?)null,
            _ => throw new ArgumentOutOfRangeException(nameof(reader), reader.TokenType, "Cannot parse unexpected JSON token type.")
        };
    }

    public override void Write(Utf8JsonWriter writer, int? value, JsonSerializerOptions options)
    {
        if (value.HasValue)
        {
            writer.WriteNumberValue(value.Value);
        }
        else
        {
            writer.WriteNullValue();
        }
    }
}

Don’t forget to register it in one of the many ways you can do so:

SSMS – Selecting rows as json truncates long json strings

Sun, 18 Nov 2018 00:40:04 -0500

In the newer versions of Microsoft SQL Server, it is now super easy to return selected rows as json data.

Unfortunately, SSMS seems to truncate json strings that are longer than 2033 chars no matter what you do. This seems to happen no matter if you show the results in the grid, text, or a file.

Here is a workaround using a variable and PRINT if you want to just get the json string on your clipboard:

Tutorial: How To Create Your Own Sprite

Mon, 20 Aug 2012 15:36:12 -0400

While there is some documentation for the *.spr file format, it can be underwhelming and full of technical jargon. This post aims to provide an easy to follow tutorial for the creation your own sprites so together we can populate the sprite network with an even larger amount and variety of random sprites.

Table Of Contents Link to heading

What is a sprite? Link to heading

If you right click your favorite sprite and open it with notepad, you’ll notice it is nothing more than plain text. This text tells the sprite engine how and what to display. When a sprite is opened, this text is read by the sprites engine which is then rendered using the sprites engine according to the file’s contents:

JSON resources in .NET

Fri, 03 Aug 2012 11:25:50 -0400

While working on Sprite Editor, I had to dig deep into the web in order to come up with a fast, lightweight method for the deserialization or parsing JSON files. The .NET 4 Framework does have a few methods to enable this functionality, but they are not very customizable or powerful.