When utilizing a question mark in a string, there is a discrepancy between the encoding in asp.net server and URL encoding

When encoding a string in ASP.NET, I use the function Server.UrlEncode(GAE?), which results in the string GAE%3f.

However, when using the JavaScript function encodeURIComponent(GAE?), the result is GAE%3F.

Unfortunately, the validation of the string fails because of this mismatch. Is there a way to encode encodeURIComponent(GAE?) as GAE%3f to meet my requirement?

Alternatively, if the encoding of Server.UrlEncode is causing the issue by capitalizing the letter 'F', is there a way to ensure it is in lowercase when using encodeURIComponent(GAE?)? The question mark (?) is currently encoded as %3F, but it should be %3f.

javascriptc#asp.net

Answer №1

In my opinion, the most effective method would involve decoding first and then conducting the comparison.

However, if there is a requirement to compare before decoding for any specific reason, you can utilize the following code to convert the encoded "special characters" to lowercase/uppercase:

string AdjustEncoding(string value) {
    var result = new StringBuilder(value);
    int searchIndex = value.IndexOf('%');

    while (searchIndex >= 0)
    {
        result[searchIndex + 1] = char.ToUpper(result[searchIndex + 1]);
        result[searchIndex + 2] = char.ToUpper(result[searchIndex + 2]);
        searchIndex = value.IndexOf('%', searchIndex + 2);
    }

    return result.ToString();
}

You can apply this function to both strings and then compare them:

if (AdjustEncoding(string1) == AdjustEncoding(string2)) { /*...*/ }

Answer №2

Have you attempted using Uri.EscapeDataString("?") yet?

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