html页面颜色名称和颜色值转换

浏览数：27 / 时间：2015年06月09日

public 
static string ToHtmlColor(string 
colorName)        {
          try
          {
              if 
(colorName.StartsWith("#"))
                  colorName = colorName.Replace("#", string.Empty);
              int 
v = int.Parse(colorName, System.Globalization.NumberStyles.HexNumber);
 
              Color col = Color.FromArgb
             (
                   Convert.ToByte((v >> 24) & 255),
                   Convert.ToByte((v >> 16) & 255),
                   Convert.ToByte((v >> 8) & 255),
                   Convert.ToByte((v >> 0) & 255)
              );
 
              int 
alpha = col.A;
              var 
red = Convert.ToString(col.R, 16); ;
              var 
green = Convert.ToString(col.G, 16);
              var 
blue = Convert.ToString(col.B, 16);
              return 
string.Format("#{0}{1}{2}", red, green, blue);
          }
          catch
          {
              return 
"black";
          }
      }
     public 
static String ColorToStr(System.Drawing.Color color)
      {
          try
          {
              string 
color_s = System.Drawing.ColorTranslator.ToHtml(color);
              color_s = color_s.Substring(1, color_s.Length - 1);
              return 
"#" + Convert.ToString(Convert.ToInt32(color_s, 16) + 40000, 16);
          }
          catch
          {
              return 
"black";
          }
      }