ASP.Net/XML/Web safe color

Web safe color list

   <source lang="csharp">

<%-- Pro ASP.NET Web Forms Techniques, Second Edition By Alex Homer ISBN: 1-59059-317-0 Published: Dec 2003 Publisher: Apress.ru --%>

<%@Page Language="C#" %> <%@Import Namespace="System.Drawing" %> <script runat="server"> void Page_Load() {

 // array to hold list of 168 "known" colors
 Color[] aKnownCols = new Color[168];
 KnownColor eValue;
 for (eValue = 0; eValue <= KnownColor.YellowGreen; eValue++) {
   aKnownCols[(int) eValue] = Color.FromKnownColor(eValue);
 }
 // array to hold list of 216 browser-safe colors
 Color[] aSafeCols = new Color[216];
 int rValue, gValue, bValue;
 int iPointer = 0;
 for (rValue = 0; rValue <= 255; rValue += 51) {
   for (gValue = 0; gValue <= 255; gValue += 51) {
     for (bValue = 0; bValue <= 255; bValue += 51) {
       aSafeCols[iPointer] = Color.FromArgb(rValue, gValue, bValue);
       iPointer += 1;
     }
   }
 }
 // create a table containing the browser-safe colors
 // and indicate any matching .NET standard color
 // declare variables, we"ll create 5 rows simultaneously
 TableRow oRow1, oRow2, oRow3, oRow4, oRow5;
 TableCell oCell;
 Color oKnown;
 String sDecimalVals, sHexVals, sKnown;
 // to create empty cell with colored background
 String sColorCell = "       ";
 // create empty Table object and five Row objects
 Table oTable = new Table();
 oRow1 = new TableRow();
 oRow2 = new TableRow();
 oRow3 = new TableRow();
 oRow4 = new TableRow();
 oRow5 = new TableRow();
 // set horizontal alignment for three rows
 oRow2.HorizontalAlign = HorizontalAlign.Center;
 oRow3.HorizontalAlign = HorizontalAlign.Center;
 oRow4.HorizontalAlign = HorizontalAlign.Center;
 // iterate through array of safe colors
 foreach (Color oColor in aSafeCols) {
   // create the strings showing decimal and hex RGB values
   sDecimalVals = oColor.R.ToString() + "," + oColor.G.ToString()
                + "," + oColor.B.ToString();
   sHexVals = "#" + oColor.R.ToString("x2") + oColor.G.ToString("x2")
            + oColor.B.ToString("x2");
   // see if this color is same as any standard color by iterating
   // through "known" colors array and comparing ARGB values.
   // not breaking at first match avoids returning "system" colors
   // such as "DialogText" and "WindowTitleBarText" which come first
   sKnown = "";
   foreach (Color oEKnown in aKnownCols) {
     if (oEKnown.ToArgb() == oColor.ToArgb()) {
       sKnown = oEKnown.Name;
     }
   }
   // create a new cell, and add LiteralControl containing value
   oCell = new TableCell();
   oCell.Controls.Add(new LiteralControl(sColorCell));
   // set properties for this cell, and add to row 1
   oCell.BorderColor = Color.Black;
   oCell.BorderStyle = BorderStyle.Solid;
   oCell.BorderWidth = Unit.Pixel(1);
   oCell.BackColor = oColor;
   oRow1.Cells.Add(oCell);
   // repeat for cells containing decimal and hex RGB values
   oCell = new TableCell();
   oCell.Controls.Add(new LiteralControl(sDecimalVals));
   oRow2.Cells.Add(oCell);
   oCell = new TableCell();
   oCell.Controls.Add(new LiteralControl(sHexVals));
   oRow3.Cells.Add(oCell);
   // create cell for matching "known" color if there is one
   oCell = new TableCell();
   if (sKnown != "") {
     oCell.Controls.Add(new LiteralControl(sKnown));
     // create color object using "known" color name
     Color oEKnown = Color.FromName(sKnown);
     oCell.BackColor = oEKnown;
     oCell.BorderColor = Color.Black;
     oCell.BorderStyle = BorderStyle.Solid;
     oCell.BorderWidth = Unit.Pixel(1);
     // see if we need to use white text on this background
     // color when displaying color name in cell
     if (oEKnown.R < 124 && oEKnown.G < 124) {
       oCell.ForeColor = Color.White;
     }
   }
   // add "known color" cell to row 4
   oRow4.Cells.Add(oCell);
   // create cell in row 5 to provide space between color rows
   oCell = new TableCell();
   oCell.Controls.Add(new LiteralControl(" "));
   oRow5.Cells.Add(oCell);
   // if Blue element of color has reached 255 start a new row
   // add five existing rows to table, create new ones and set
   // horizontal alignment for the three of them holding text
   if (oColor.B == 255) {
     oTable.Rows.Add(oRow1);
     oTable.Rows.Add(oRow2);
     oTable.Rows.Add(oRow3);
     oTable.Rows.Add(oRow4);
     oTable.Rows.Add(oRow5);
     oRow1 = new TableRow();
     oRow2 = new TableRow();
     oRow3 = new TableRow();
     oRow4 = new TableRow();
     oRow5 = new TableRow();
     oRow2.HorizontalAlign = HorizontalAlign.Center;
     oRow3.HorizontalAlign = HorizontalAlign.Center;
     oRow4.HorizontalAlign = HorizontalAlign.Center;
   }
 }
 // table complete, so insert into page within PlaceHolder control
 ctlPlaceholder.Controls.Add(oTable);

} </script> <!doctype html public "-//W3C//DTD HTML 3.2 Final//EN"> <html> <head> <title>Browser-safe and Standard Colors</title> </head> <body> Browser-safe and Standard Colors <asp:PlaceHolder id="ctlPlaceholder" runat="server" /> </body> </html>

      </source>