Convert string to Color in C

Question

I am encountering a problem which is how do I convert input strings like  RED  to the actual Color type Color Red in C   Is there a good way to do this   I could think of using a switch statement and cases statement for each color type but I don t think that is clever enough

User · Answer

Since the OP mentioned in a comment that he s using Microsoft Xna Framework Graphics Color rather than System Drawing Color you can first create a System Drawing Color then convert it to a Microsoft Xna Framework Graphics Color  public static Color FromName string colorName        System Drawing Color systemColor   System Drawing Color FromName colorName          return new Color systemColor R  systemColor G  systemColor B  systemColor A     Here Color is Microsoft Xna Framework Graphics Color

User · Answer

The simplest way   string input   null  Color color   Color White   TextBoxText Changed object sender  EventsArgs e       input   TextBox Text     Button Click object sender  EventsArgs e       color   Color FromName input

User · Answer

Color red   Color FromName  Red         The MSDN doesn t say one way or another  so there s a good chance that it is case-sensitive    UPDATE  Apparently  it is not    As far as I can tell  ColorTranslator FromHtml is also   If Color FromName cannot find a match  it returns new Color 0 0 0    If ColorTranslator FromHtml cannot find a match  it throws an exception   UPDATE   Since you re using Microsoft Xna Framework Graphics Color  this gets a bit tricky   using XColor   Microsoft Xna Framework Graphics Color  using CColor   System Drawing Color    CColor clrColor   CColor FromName  Red      XColor xColor   new XColor clrColor R  clrColor G  clrColor B  clrColor A

User · Answer

It depends on what you re looking for  if you need System Windows Media Color  like in WPF  it s very easy   System Windows Media Color color    Color System Windows Media ColorConverter ConvertFromString  Red     or hexadecimal color  e g   131A84

User · Answer

It would really have been nice if you d mentioned which Color type you were interested in to start with      One simple way of doing this is to just build up a dictionary via reflection   public static class Colors       private static readonly Dictionary lt string  Color gt  dictionary           typeof Color  GetProperties BindingFlags Public                                        BindingFlags Static                        Where prop   gt  prop PropertyType    typeof Color                         ToDictionary prop   gt  prop Name                                     prop   gt   Color  prop GetValue null  null          public static Color FromName string name                   Adjust behaviour for lookup failure etc         return dictionary name             That will be relatively slow for the first lookup  while it uses reflection to find all the properties  but should be very quick after that   If you want it to be case-insensitive  you can pass in something like StringComparer OrdinalIgnoreCase as an extra argument in the ToDictionary call  You can easily add TryParse etc methods should you wish   Of course  if you only need this in one place  don t bother with a separate class etc

User · Answer

I ve used something like this before           public static T CreateFromString lt T gt  string stringToCreateFrom             T output   Activator CreateInstance lt T gt              if   output GetType   IsEnum              throw new IllegalTypeException             try               output    T  Enum Parse typeof  T   stringToCreateFrom  true                     catch  Exception ex                string error    Cannot parse      stringToCreateFrom      to enum      typeof  T  FullName                     logger Error error  ex               throw new IllegalArgumentException error  ex                      return output

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The following can generate a color from name  hex  or known name  Color beige   StringToColor  quot Beige quot    Color purple   StringToColor  quot  800080 quot    Color window   StringToColor  quot Window quot     public static Color StringToColor string colorStr        TypeConverter cc   TypeDescriptor GetConverter typeof Color        var result    Color cc ConvertFromString colorStr       return result     The snippet was taken from Jo Albahari s C  in a Nutshell

User · Answer

This worked nicely for my needs    Hope someone can use it          public static Color FromName String name                var color props  typeof Colors  GetProperties            foreach  var c in color props              if  name Equals c Name  StringComparison OrdinalIgnoreCase                   return  Color c GetValue new Color    null           return Colors Transparent

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System Drawing Color myColor   System Drawing ColorTranslator FromHtml  Red       Use my method if you want to accept HTML-style hex colors

User · Answer

For transferring colors via xml-strings I ve found out   Color x   Color Red     for example String s   x ToArgb   ToString       to from xml     Int32 argb   Convert ToInt32 s   Color red   Color FromArgb argb

[c#] Convert string to Color in C#

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