Finding the equivalent of BigInt from Javascript in C#

Question

Finding the equivalent of BigInt from Javascript in C#

After creating a JavaScript script that converts a string to BigInt, I encountered a challenge while trying to find a C# equivalent function. The original conversion in Javascript looked like this:

BigInt("0x40000000061c924300441104148028c80861190a0ca4088c144020c60c831088")

The output was: 28948022309972676171332135370609260321582865398090858033119816311589805691016

I attempted using the following functions in C#:

Convert.ToInt64("0x40000000061c924300441104148028c80861190a0ca4088c144020c60c831088")

and

BigInteger.Parse("0x40000000061c924300441104148028c80861190a0ca4088c144020c60c831088",NumberStyles.Any)

However, both resulted in an exception stating that the value could not be parsed.

If anyone has insight or suggestions on a C# function that can achieve the same result as BigInt() in JS, it would be greatly appreciated!

javascript c#

Answer 1

Answer №1

To convert a BigInteger back to string format, use the ToString() method and pass the parameter "R" to maintain its original value.

Here is an excerpt from the documentation:

"In most cases, when using the ToString method with a BigInteger, only 50 decimal digits of precision are supported. If the BigInteger value has more than 50 digits, only the 50 most significant digits will be preserved in the output string; all others will be replaced with zeros. However, by using the "R" format specifier, you can ensure that the whole BigInteger value is preserved for round-tripping numeric values. This means that the string returned by ToString(String) with the "R" format maintains the entire BigInteger value, allowing it to be parsed with Parse or TryParse without any loss of data."

Consider using "R" instead of "N" for your conversion needs.

For further information and an example, visit: http://msdn.microsoft.com/en-us/library/dd268260.aspx

Answer 2

To convert a BigInteger back to string format, use the ToString() method and pass the parameter "R" to maintain its original value.

Here is an excerpt from the documentation:

"In most cases, when using the ToString method with a BigInteger, only 50 decimal digits of precision are supported. If the BigInteger value has more than 50 digits, only the 50 most significant digits will be preserved in the output string; all others will be replaced with zeros. However, by using the "R" format specifier, you can ensure that the whole BigInteger value is preserved for round-tripping numeric values. This means that the string returned by ToString(String) with the "R" format maintains the entire BigInteger value, allowing it to be parsed with Parse or TryParse without any loss of data."

Consider using "R" instead of "N" for your conversion needs.

For further information and an example, visit: http://msdn.microsoft.com/en-us/library/dd268260.aspx

Answer 3

Answer №2

To properly parse hex values, it is important to remove the leading "0x".

         private static BigInteger? ParseHexBigInteger(string input) {
            if (input.StartsWith("0x", StringComparison.OrdinalIgnoreCase)) {
                if (BigInteger.TryParse(input.Substring(2), NumberStyles.AllowHexSpecifier, CultureInfo.InvariantCulture, out var bigInt)) {
                    return bigInt;
                }
            }
            else if (BigInteger.TryParse(input, NumberStyles.Any, CultureInfo.InvariantCulture, out var bigInt)) {
                return bigInt;
            }
            return null;
        }
    

        //Example Usage
        var hexValue = ParseHexBigInteger("0x40000000061c924300441104148028c80861190a0ca4088c144020c60c831088");
// => Result: 28948022309972676171332135370609260321582865398090858033119816311589805691016

Answer 4

To properly parse hex values, it is important to remove the leading "0x".

         private static BigInteger? ParseHexBigInteger(string input) {
            if (input.StartsWith("0x", StringComparison.OrdinalIgnoreCase)) {
                if (BigInteger.TryParse(input.Substring(2), NumberStyles.AllowHexSpecifier, CultureInfo.InvariantCulture, out var bigInt)) {
                    return bigInt;
                }
            }
            else if (BigInteger.TryParse(input, NumberStyles.Any, CultureInfo.InvariantCulture, out var bigInt)) {
                return bigInt;
            }
            return null;
        }
    

        //Example Usage
        var hexValue = ParseHexBigInteger("0x40000000061c924300441104148028c80861190a0ca4088c144020c60c831088");
// => Result: 28948022309972676171332135370609260321582865398090858033119816311589805691016

Answer 5

Answer №3

Bigint in JavaScript represents a 64-bit integer, also known as a long or Int64.

For more information, check out this article.

Answer 6

Bigint in JavaScript represents a 64-bit integer, also known as a long or Int64.

For more information, check out this article.

Answer 7

Answer №4

To make it function, simply eliminate the 'x' character in the string and enable the hex specifier:

After removing the 'x', use this code: BigInteger.Parse("0x40000000061c924300441104148028c80861190a0ca4088c144020c60c831088".Replace("x", string.Empty), NumberStyles.AllowHexSpecifier);

Answer 8

To make it function, simply eliminate the 'x' character in the string and enable the hex specifier:

After removing the 'x', use this code: BigInteger.Parse("0x40000000061c924300441104148028c80861190a0ca4088c144020c60c831088".Replace("x", string.Empty), NumberStyles.AllowHexSpecifier);

Finding the equivalent of BigInt from Javascript in C#

Answer №1

Answer №2

Answer №3

Answer №4

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