String Format for Hex

Question

With below code  the colorsting always gives  DDDD  Green  Red and Space values int he How to fix this   string colorstring  int Blue   13  int Green   0  int Red   0  int Space   14  colorstring   String Format    0 X  0 X  0 X  0 X    Blue  Green  Red  Space

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More generally   byte   buf   new byte     123  2  233     string s   String Concat buf Select b   gt  b ToString  X2

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Translate composed UInt32 color Value to CSS in  NET  I know the question applies to 3 input values  red green blue   But there may be the situation where you already have a composed 32bit Value  It looks like you want to send the data to some HTML CSS renderer  because of the  HEX format   Actually CSS wants you to print 6 or at least 3 zero filled hex digits here  so   0 X06  or   0 X03  would be required  Due to some strange behaviour  this always prints 8 digits instead of 6    Solve this by   String Format    0 X02  1 X02  2 X02     Value  amp  0x00FF0000   gt  gt  16   Value  amp  0x0000FF00   gt  gt  8   Value  amp  0x000000FF   gt  gt  0

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If we have built in functions to convert your integer values to COLOR then why to worry   string hexValue   string Format   0 X    intColor    Color brushes   System Drawing ColorTranslator FromHtml     hexValue

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The number 0 in  0 X  refers to the position in the list or arguments  In this case 0 means use  the first value  which is Blue  Use  1 X  for the second argument  Green   and so on  colorstring   String Format  quot   0 X  1 X  2 X  3 X  quot   Blue  Green  Red  Space     The syntax for the format parameter is described in the documentation   Format Item Syntax Each format item takes the following form and consists of the following components    index  alignment   formatString    The matching braces   quot   quot  and  quot   quot   are required  Index Component The mandatory index component  also called a parameter specifier  is a number starting from 0 that identifies a corresponding item in the list of objects  That is  the format item whose parameter specifier is 0 formats the first object in the list  the format item whose parameter specifier is 1 formats the second object in the list  and so on  Multiple format items can refer to the same element in the list of objects by specifying the same parameter specifier  For example  you can format the same numeric value in hexadecimal  scientific  and number format by specifying a composite format string like this   quot  0 X   0 E   0 N  quot   Each format item can refer to any object in the list  For example  if there are three objects  you can format the second  first  and third object by specifying a composite format string like this   quot  1   0   2  quot   An object that is not referenced by a format item is ignored  A runtime exception results if a parameter specifier designates an item outside the bounds of the list of objects  Alignment Component The optional alignment component is a signed integer indicating the preferred formatted field width  If the value of alignment is less than the length of the formatted string  alignment is ignored and the length of the formatted string is used as the field width  The formatted data in the field is right-aligned if alignment is positive and left-aligned if alignment is negative  If padding is necessary  white space is used  The comma is required if alignment is specified  Format String Component The optional formatString component is a format string that is appropriate for the type of object being formatted  Specify a standard or custom numeric format string if the corresponding object is a numeric value  a standard or custom date and time format string if the corresponding object is a DateTime object  or an enumeration format string if the corresponding object is an enumeration value  If formatString is not specified  the general   quot G quot   format specifier for a numeric  date and time  or enumeration type is used  The colon is required if formatString is specified   Note that in your case you only have the index and the format string  You have not specified  and do not need  an alignment component

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You can also pad the characters left by including a number following the X  such as this  string format  0x 0 X8    string to modify   which yields  0x00000C20

[c#] String.Format for Hex

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