C# basic JsonConverter tip
Introduction Learn how to properly use a JsonConverter, along with property and global setup for converters. Before getting started, the converter is intentionally simple. The focus here is proper planning for the data for a specific task, like importing data from a JSON file into a database, in this case, properly formatted. Sample converter Reads and converts the JSON string value to ensure the…
Using a JsonConverter in C# can simplify the process of converting data formats, such as importing data from a JSON file into a database. Proper planning of the data for a specific task, like ensuring proper formatting, is crucial. In this example, a simple JsonConverter is used to read and convert the JSON string value, capitalizing the first character of a string.
The provided JsonConverter, named `UpperCaseFirstCharConverter`, inherits from `JsonConverter` and implements three methods: `CanConvert`, `Read`, and `Write`. The `CanConvert` method checks if the desired type to convert is a string. The `Read` method reads the JSON string value, sets it to an empty string if null, and capitalizes the first character using the `CapitalizeFirstLetter()` method. The `Write` method writes the string value to the JSON output.
To use the converter, include it in the `GlobalJsonOptions` with other converters and set `WriteIndented` to true for proper formatting. In the example usage, a list of `Person` objects is defined with sample data, including names in lowercase. The `JsonSerializer` is then used to deserialize the JSON data into a list of `Person` objects, and the list is serialized back into JSON format using the `UpperCaseFirstCharConverter`.
This results in a proper-cased JSON output, with the first character of the `FirstName` and `LastName` properties capitalized.
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