Convert int to hex with leading zeros

C#HexString Formatting

C# Problem Overview

How to convert int (4 bytes) to hex ("XX XX XX XX") without cycles?

for example:

i=13 hex="00 00 00 0D"

i.ToString("X") returns "D", but I need a 4-bytes hex value.

C# Solutions

Solution 1 - C#

You can specify the minimum number of digits by appending the number of hex digits you want to the X format string. Since two hex digits correspond to one byte, your example with 4 bytes needs 8 hex digits. i.e. use i.ToString("X8").

If you want lower case letters, use x instead of X. For example 13.ToString("x8") maps to 0000000d.

Solution 2 - C#

try this:

int innum = 123;
string Hex = innum .ToString("X");  // gives you hex "7B"
string Hex = innum .ToString("X8");  // gives you hex 8 digit "0000007B"
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Questionuser2264990View Question on Stackoverflow
Solution 1 - C#CodesInChaosView Answer on Stackoverflow
Solution 2 - C#KF2View Answer on Stackoverflow