Why Does Json.NET Throw an 'Unexpected Character' Error When Deserializing a File Path?

Unexpected Character Parsing Error in Json.NET

When working with Json.NET, you may encounter the error "Unexpected character encountered while parsing value." This error typically occurs when Json.NET attempts to deserialize invalid or malformed JSON.

Cause of the Error

In the provided case, the specified JSON file path is assigned to the tmpfile string. However, the DeserializeObject method expects a valid JSON string as its argument, not a file path. As a result, the error is thrown when Json.NET tries to parse the file path as JSON.

Solution

To resolve this error, you need to modify the code to read the contents of the JSON file into a string and then deserialize the string using DeserializeObject. Here's the corrected code:

string json = File.ReadAllText(tmpfile);
ViewerStatsFormat current = JsonConvert.DeserializeObject<ViewerStatsFormat>(json);

By loading the file contents into the json string, you can then provide Json.NET with the valid JSON data it needs to deserialize.

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