How to Handle ASP.NET MVC JsonResult's Non-Standard Date Format in JavaScript?

ASP.NET MVC JsonResult Date Format

When returning a JsonResult in ASP.NET MVC, you may encounter an issue where date properties are serialized in a format like "/Date(1239018869048)/". This format is not readable by JavaScript and can cause problems when handling dates in your application.

Solution 1: Manually Parse Date String in JavaScript

One approach is to parse the date string manually in JavaScript using the following code:

value = new Date(parseInt(value.replace("/Date(", "").replace(")/",""), 10));

This code removes the "Date(" and ")" characters from the string and converts it to a Date object.

Solution 2: Use JSON.parse() with a Reviver Function

Another option is to use the JSON.parse() function with a reviver function that converts the date string to a Date object. For example:

var parsed = JSON.parse(data, function(key, value) {
  if (typeof value === 'string') {
    var d = /\/Date\((\d*)\)\//.exec(value);
    return (d) ? new Date(+d[1]) : value;
  }
  return value;
});

In this code, the reviver function checks if the value is a string and matches the "/Date((d*))/" pattern. If it does, the value is converted to a Date object using the Date constructor. Otherwise, the original value is returned.

Additional Considerations

It's important to note that the JSON specification does not define a standard date format. The "/Date(ticks)/" format used by ASP.NET MVC is a convention that allows JSON to represent a Date object.

When handling dates in JavaScript, you should consider the following:

• The Date.parse() function can also be used to parse date strings, but it has some limitations.
• You may need to specify the correct time zone when creating a Date object to ensure that dates are handled correctly.
• ES6 introduced a new Date.toISOString() method that returns a date in the ISO 8601 format, which is a standard format recognized by many programming languages and applications.

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