namespace ExampleCodeSnippets
{
 using cd = CreatingData;

 public class SymbolRotationTheming
 {
 /// <summary>
 /// Name of the column, which contains the rotation angle in degrees [0, 360]
 /// </summary>
 public System.String StyleRotationColumn { get; set; }

 /// <summary>
 /// Default vector style from which parts are to be modified
 /// </summary>
 public SharpMap.Styles.VectorStyle DefaultStyle { get; set; }

 /// <summary>
 /// Creates an instance of this class
 /// </summary>
 /// <param name="styleRotationColumn">Name of the column, which contains the rotation angle in degrees [0, 360]</param>
 public SymbolRotationTheming(System.String styleRotationColumn)
 :this(styleRotationColumn, new SharpMap.Styles.VectorStyle())
 {
 }

 /// <summary>
 /// Creates an instance of this class
 /// </summary>
 /// <param name="styleRotationColumn">Name of the column, which contains the rotation angle in degrees [0, 360]</param>
 /// <param name="defaultStyle">Default vector style from which parts are to be modified</param>
 public SymbolRotationTheming(System.String styleRotationColumn, SharpMap.Styles.VectorStyle defaultStyle)
 {
 StyleRotationColumn = styleRotationColumn;
 DefaultStyle = defaultStyle;
 }

 private static SharpMap.Styles.VectorStyle CloneStyle(SharpMap.Styles.VectorStyle styleToClone)
 {
 SharpMap.Styles.VectorStyle style =
 new SharpMap.Styles.VectorStyle
 {
 Enabled = styleToClone.Enabled,
 MinVisible = styleToClone.MinVisible,
 MaxVisible = styleToClone.MaxVisible,
 Line = styleToClone.Line.Clone() as System.Drawing.Pen,
 Fill = styleToClone.Fill.Clone() as System.Drawing.Brush,
 Outline = styleToClone.Outline.Clone() as System.Drawing.Pen,
 EnableOutline = styleToClone.EnableOutline,
 Symbol = styleToClone.Symbol.Clone() as System.Drawing.Bitmap,
 SymbolOffset = styleToClone.SymbolOffset,
 SymbolRotation = styleToClone.SymbolRotation,
 SymbolScale = styleToClone.SymbolScale
 };

 return style;
 }

 public SharpMap.Styles.VectorStyle GetRotatedSymol(SharpMap.Data.FeatureDataRow row)
 {
 if (!System.String.IsNullOrEmpty(StyleRotationColumn))
 try
 {
 SharpMap.Styles.VectorStyle dataStyle = CloneStyle(DefaultStyle);
 dataStyle.SymbolRotation = System.Convert.ToSingle(row[StyleRotationColumn]);
 return dataStyle;
 }
 catch { }

 return null;
 }
 }

 public class SymbolFromFeatureDataRowTheming
 {
 /// <summary>
 /// Name of the column, which contains the rotation angle in degrees [0, 360]
 /// </summary>
 public System.String SymbolColumn { get; set; }

 /// <summary>
 /// Default vector style from which parts are to be modified
 /// </summary>
 public SharpMap.Styles.VectorStyle DefaultStyle { get; set; }

 /// <summary>
 /// Creates an instance of this class
 /// </summary>
 /// <param name="symbolColumn">Name of the column, which contains the symbol</param>
 public SymbolFromFeatureDataRowTheming(System.String symbolColumn)
 : this(symbolColumn, new SharpMap.Styles.VectorStyle())
 {
 }

 /// <summary>
 /// Creates an instance of this class
 /// </summary>
 /// <param name="styleRotationColumn">Name of the column, which contains the symbol</param>
 /// <param name="defaultStyle">Default vector style from which parts are to be modified</param>
 public SymbolFromFeatureDataRowTheming(System.String styleRotationColumn, SharpMap.Styles.VectorStyle defaultStyle)
 {
 SymbolColumn = styleRotationColumn;
 DefaultStyle = defaultStyle;
 }

 private static SharpMap.Styles.VectorStyle CloneStyle(SharpMap.Styles.VectorStyle styleToClone)
 {
 SharpMap.Styles.VectorStyle style =
 new SharpMap.Styles.VectorStyle
 {
 Enabled = styleToClone.Enabled,
 MinVisible = styleToClone.MinVisible,
 MaxVisible = styleToClone.MaxVisible,
 Line = styleToClone.Line.Clone() as System.Drawing.Pen,
 Fill = styleToClone.Fill.Clone() as System.Drawing.Brush,
 Outline = styleToClone.Outline.Clone() as System.Drawing.Pen,
 EnableOutline = styleToClone.EnableOutline,
 Symbol = styleToClone.Symbol.Clone() as System.Drawing.Bitmap,
 SymbolOffset = styleToClone.SymbolOffset,
 SymbolRotation = styleToClone.SymbolRotation,
 SymbolScale = styleToClone.SymbolScale
 };

 return style;
 }

 public SharpMap.Styles.VectorStyle GetRotatedSymol(SharpMap.Data.FeatureDataRow row)
 {
 if (!System.String.IsNullOrEmpty(SymbolColumn))
 try
 {
 SharpMap.Styles.VectorStyle dataStyle = CloneStyle(DefaultStyle);
 if (!row.IsNull(SymbolColumn))
 {
 dataStyle.Symbol = new System.Drawing.Bitmap(
 new System.IO.MemoryStream((byte[]) row[SymbolColumn]));
 }
 return dataStyle;
 }
 catch { }

 return null;
 }
 }

 [NUnit.Framework.TestFixture]
 public class SymbolRotationThemingTest
 {
 private static readonly System.Random _randomNumberGenerator = new System.Random();
 static System.Double[] GetRandomOrdinates(System.Int32 size, System.Double min, System.Double max)
 {
 System.Double[] arr = new System.Double[size];
 System.Double width = max - min;
 for(System.Int32 i = 0; i < size; i++)
 {
 System.Double randomValue = _randomNumberGenerator.NextDouble();
 arr[i] = min + randomValue*width;
 }
 return arr;
 }
 
 [NUnit.Framework.Test]
 public void TestSymbolRotationTheming()
 {
 //Create a map
 SharpMap.Map map = new SharpMap.Map(new System.Drawing.Size(720,360));
 
 //Create some random sample data
 SharpMap.Data.FeatureDataTable fdt =
 cd.CreatePointFeatureDataTableFromArrays(cd.GetRandomOrdinates(80, -180, 180),
 cd.GetRandomOrdinates(80, -90, 90), null);

 //Add rotation column and fill with random rotation values
 fdt.Columns.Add("Rotation", typeof (System.Double));
 foreach (SharpMap.Data.FeatureDataRow row in fdt.Rows)
 row["Rotation"] = _randomNumberGenerator.NextDouble()*360d;


 //Create layer and datasource
 SharpMap.Layers.VectorLayer vl = new SharpMap.Layers.VectorLayer("Points", new SharpMap.Data.Providers.GeometryFeatureProvider(fdt));
 
 //Create default style
 SharpMap.Styles.VectorStyle defaultStyle = new SharpMap.Styles.VectorStyle();
 defaultStyle.Symbol = new System.Drawing.Bitmap(@"..\..\..\DemoWinForm\Resources\flag.png");
 defaultStyle.SymbolScale = 0.5f;

 //Create theming class and apply to layer
 SymbolRotationTheming srt = new SymbolRotationTheming("Rotation", defaultStyle);
 vl.Theme = new SharpMap.Rendering.Thematics.CustomTheme(srt.GetRotatedSymol);

 map.Layers.Add(vl);
 map.ZoomToExtents();
 System.Drawing.Image mapImage = map.GetMap();
 mapImage.Save("SymbolRotation.bmp");
 }
 }

 [NUnit.Framework.TestFixture]
 public class SymbolFromFeatureDataRowTest
 {
 //private static readonly System.Random _randomNumberGenerator = new System.Random();
 //static System.Double[] GetRandomOrdinates(System.Int32 size, System.Double min, System.Double max)
 //{
 // System.Double[] arr = new System.Double[size];
 // System.Double width = max - min;
 // for (System.Int32 i = 0; i < size; i++)
 // {
 // System.Double randomValue = _randomNumberGenerator.NextDouble();
 // arr[i] = min + randomValue * width;
 // }
 // return arr;
 //}

 [NUnit.Framework.Test]
 public void TestSymbolSelectionTheming()
 {
 //Create a map
 SharpMap.Map map = new SharpMap.Map(new System.Drawing.Size(720, 360));

 //Create some random sample data
 SharpMap.Data.FeatureDataTable fdt =
 cd.CreatePointFeatureDataTableFromArrays(cd.GetRandomOrdinates(80, -180, 180),
 cd.GetRandomOrdinates(80, -90, 90), null);

 //Add rotation column and fill with random rotation values
 fdt.Columns.Add("Symbol", typeof(System.Byte[]));
 foreach (SharpMap.Data.FeatureDataRow row in fdt.Rows)
 row["Symbol"] = RandomSymbol((int)System.Math.Floor(cd.RandomNumberGenerator.NextDouble() * 360d));


 //Create layer and datasource
 SharpMap.Layers.VectorLayer vl = new SharpMap.Layers.VectorLayer("Points", new SharpMap.Data.Providers.GeometryFeatureProvider(fdt));

 //Create default style
 SharpMap.Styles.VectorStyle defaultStyle = new SharpMap.Styles.VectorStyle();
 defaultStyle.Symbol = new System.Drawing.Bitmap(@"..\..\..\DemoWinForm\Resources\flag.png");
 defaultStyle.SymbolScale = 0.5f;

 //Create theming class and apply to layer
 SymbolFromFeatureDataRowTheming srt = new SymbolFromFeatureDataRowTheming("Symbol", defaultStyle);
 vl.Theme = new SharpMap.Rendering.Thematics.CustomTheme(srt.GetRotatedSymol);

 map.Layers.Add(vl);
 map.ZoomToExtents();
 System.Drawing.Image mapImage = map.GetMap();
 mapImage.Save("SymbolFromFDR.bmp");
 }

 private byte[] RandomSymbol(int number)
 {
 number = number%360;
 string text ="";
 System.Drawing.Brush brush = null;
 if (number < 60)
 return null;
 if (number < 120)
 {
 text = "<120";
 brush = System.Drawing.Brushes.DarkGreen;
 }
 else if(number < 240)
 {
 text = number.ToString();
 brush = System.Drawing.Brushes.Orange;
 }
 else
 {
 text = ">240";
 brush = System.Drawing.Brushes.Red;
 }

 System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(120, 60);
 System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bmp);
 System.Drawing.RectangleF size = new System.Drawing.RectangleF(0f, 0f, 120f, 60f);
 g.FillRectangle(System.Drawing.Brushes.White, size);
 var sf = new System.Drawing.StringFormat(System.Drawing.StringFormatFlags.NoWrap)
 {Alignment = System.Drawing.StringAlignment.Center};

 g.DrawString(text, new System.Drawing.Font("Arial", 24), brush, size, sf);
 g.Flush();
 g.Dispose();
 var ms = new System.IO.MemoryStream();
 bmp.MakeTransparent(System.Drawing.Color.White);
 bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
 return ms.ToArray();
 }
 }

 public class TestExternalData
 {
 public void DoTest()
 {
 SharpMap.Data.Providers.ShapeFile sf = new SharpMap.Data.Providers.ShapeFile("cities.shp");
 SharpMap.Data.FeatureDataSet fds = new SharpMap.Data.FeatureDataSet();
 sf.ExecuteIntersectionQuery(sf.GetExtents(), fds);
 SharpMap.Data.Providers.GeometryFeatureProvider gfp =
 new SharpMap.Data.Providers.GeometryFeatureProvider(fds.Tables[0]);

 System.Data.DataTable dt = new System.Data.DataTable("external");
 dt.Columns.Add("city", typeof (string));
 dt.Columns.Add("males", typeof (int));
 dt.Columns.Add("females", typeof (int));


 }
 }
}