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How to convert between hexadecimal strings and numeric types
Learn how to convert between hexadecimal strings and numeric types. See code examples and view additional available resources.
07/20/2015
hexadecimal strings [C#], converting to numeric type
conversions [C#], hexadecimal strings
strings [C#], converting hexadecimal strings
hexadecimal strings [C#]
how-to
7115c49f-7d1d-40c3-8bd9-aae0cc1d46b6

How to convert between hexadecimal strings and numeric types (C# Programming Guide)

These examples show you how to perform the following tasks:

  • Obtain the hexadecimal value of each character in a string.

  • Obtain the char that corresponds to each value in a hexadecimal string.

  • Convert a hexadecimal string to an int.

  • Convert a hexadecimal string to a float.

  • Convert a byte array to a hexadecimal string.

Examples

This example outputs the hexadecimal value of each character in a string. First it parses the string to an array of characters. Then it calls xref:System.Convert.ToInt32%28System.Char%29 on each character to obtain its numeric value. Finally, it formats the number as its hexadecimal representation in a string.

[!code-csharpcsProgGuideTypes#30]

This example parses a string of hexadecimal values and outputs the character corresponding to each hexadecimal value. First it calls the Split(Char[]) method to obtain each hexadecimal value as an individual string in an array. Then it calls xref:System.Convert.ToInt32%28System.String%2CSystem.Int32%29 to convert the hexadecimal value to a decimal value represented as an int. It shows two different ways to obtain the character corresponding to that character code. The first technique uses xref:System.Char.ConvertFromUtf32%28System.Int32%29, which returns the character corresponding to the integer argument as a string. The second technique explicitly casts the int to a char.

[!code-csharpcsProgGuideTypes#31]

This example shows another way to convert a hexadecimal string to an integer, by calling the xref:System.Int32.Parse%28System.String%2CSystem.Globalization.NumberStyles%29 method.

[!code-csharpcsProgGuideTypes#32]

The following example shows how to convert a hexadecimal string to a float by using the xref:System.BitConverter?displayProperty=nameWithType class and the xref:System.UInt32.Parse%2A?displayProperty=nameWithType method.

[!code-csharpcsProgGuideTypes#39]

The following example shows how to convert a byte array to a hexadecimal string by using the xref:System.BitConverter?displayProperty=nameWithType class.

[!code-csharpcsProgGuideTypes#38]

The following example shows how to convert a byte array to a hexadecimal string by calling the xref:System.Convert.ToHexString%2A?displayProperty=nameWithType method introduced in .NET 5.0.

[!code-csharpcsProgGuideTypes#48]

See also