使用JavaScript解析.NET编码的JSON时出现意外字符

Question

I'm developing an ASP.NET Web Pages app, and I'm seeing a problem where the Javascript JSON.parse() method is unable to parse JSON output by the .NET Json.Encode() method. My specific problem is with the ampersand (&) character (Unicode U+0026).

For example, executing this code:

object SomeObject = new { SomeProperty = "A&B" };
Response.Write(Json.Encode(SomeObject));

In my .cshtml file results in the following content in the response:

{"SomeProperty":"A\u0026B"}

Which leads to a SyntaxError: Unexpected token u in my JavaScript:

function SomeCallback(aRequest) {
    if (aRequest.status === 200) {
        var lResponseJSON = JSON.parse(aRequest.Response); // Error on this line
    }
}

How can I get the .NET JSON encoding and the JS JSON decoding to play nice when special characters are involved?

(Preferably, short of manually going through the stringified JSON before it's parsed to replace the unicode encodings)

EDIT: Might be worth mentioning that using Json.Write(SomeObject, Response.Output) instead of Response.Write(Json.Encode(SomeObject)) has no effect on the JSON output.

Answer 1

Your problem has to be somewhat different that you are showing:

When I run this code through my console:

var k = JSON.parse('{"SomeProperty":"A\u0026B"}')
console.log(k);
// Object {SomeProperty: "A&B"}

everything behaves correctly.

Though it looks strange, this is valid JSON:

{"SomeProperty":"A\u0026B"}