====== Source Code ServicesEditionSample LabelToShowLocation CS 091218.zip ======


====Program.cs====

<code csharp> using System;  
 using System.Collections.Generic;  
 using System.Linq;  
 using System.Windows.Forms;  
  
 namespace LabelToShowLocation  
 {  
     static class Program  
     {  
         /// <summary>  
         /// The main entry point for the application.  
         /// </summary>  
         [STAThread]  
         static void Main()  
         {  
             Application.EnableVisualStyles();  
             Application.SetCompatibleTextRenderingDefault(false);  
             Application.Run(new TestForm());  
         }  
     }  
 }  
 </code>



====TestForm.cs====

<code csharp> using System;  
 using System.Collections.ObjectModel;  
 using System.Drawing;  
 using System.Windows.Forms;  
 using ThinkGeo.MapSuite.Core;  
  
 namespace LabelToShowLocation  
 {  
     public partial class TestForm : Form  
     {  
         private MapEngine mapEngine = new MapEngine();  
         private Bitmap bitmap = null;  
  
        public TestForm()  
         {  
             InitializeComponent();  
         }  
  
         private void TestForm_Load(object sender, EventArgs e)  
         {  
             // Set the extent and the background color  
             mapEngine.CurrentExtent = ExtentHelper.GetDrawingExtent(new RectangleShape(-83.2794,36.8835,-82.755,36.5744), Map.Width, Map.Height);  
             mapEngine.BackgroundFillBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean);  
  
             //Displays the World Map Kit as a background.  
             ThinkGeo.MapSuite.Core.WorldMapKitLayer worldMapKitLayer = new ThinkGeo.MapSuite.Core.WorldMapKitLayer();  
             mapEngine.StaticLayers.Add(worldMapKitLayer);  
  
             //Layers for labeling location only, no displaying. Using counties and states.  
             ShapeFileFeatureLayer Layer1 = new ShapeFileFeatureLayer(@"..\..\Data\counties.shp");  
             ShapeFileFeatureLayer Layer2 = new ShapeFileFeatureLayer(@"..\..\Data\USStates.shp");  
             mapEngine.StaticLayers.Add("CountyLayer", Layer1);  
             mapEngine.StaticLayers.Add("StateLayer", Layer2);  
  
             DrawImage();  
  
             LabelLocation();  
         }  
  
         //Function for updating the label with the location of the center of the map with the county and state information.  
         private void LabelLocation()  
         {  
             string county = "";  
             string state = "";  
             //Gets the point in world coordinate of the center of the current extent.  
             PointShape centerPointShape = ExtentHelper.ToWorldCoordinate(mapEngine.CurrentExtent, bitmap.Width / 2,  
                           bitmap.Height / 2, bitmap.Width, bitmap.Height);  
  
             //Displays the label for county only if current extent is within 1 degree (if using decimal degrees as GeographyUnit)  
             if (mapEngine.CurrentExtent.Width < 1)  
             {  
             ShapeFileFeatureLayer countyLayer = (ShapeFileFeatureLayer)mapEngine.StaticLayers["CountyLayer"];  
             countyLayer.Open();  
             //Spatial query to find the county being in the center of the map.  
             Collection<Feature> countyFeatures = countyLayer.FeatureSource.SpatialQuery(centerPointShape, QueryType.Contains, ReturningColumnsType.AllColumns);  
             countyLayer.Close();  
                 if (countyFeatures.Count > 0)  
                 {  
                     county = countyFeatures[0].ColumnValues["Name"] + " county, ";  
                 }  
             }  
  
             //Displays the label for the state only if current extent is withing 5 degrees (if using deciaml degrees as GeographyUnit)  
             if (mapEngine.CurrentExtent.Width < 5)  
             {  
                 ShapeFileFeatureLayer stateLayer = (ShapeFileFeatureLayer)mapEngine.StaticLayers["StateLayer"];  
                 stateLayer.Open();  
                 //Spatial query to find the state being in the center of the map.  
                 Collection<Feature> stateFeatures = stateLayer.QueryTools.GetFeaturesContaining(centerPointShape, ReturningColumnsType.AllColumns);  
                 stateLayer.Close();  
                 if (stateFeatures.Count > 0)  
                 {  
                     state = stateFeatures[0].ColumnValues["State_name"];  
                 }  
             }  
  
             lblLocation.Text = county + state;  
         }  
  
         private void DrawImage()  
         {  
             if (bitmap != null) { bitmap.Dispose(); }  
             bitmap = new Bitmap(Map.Width, Map.Height);  
             mapEngine.OpenAllLayers();  
             mapEngine.DrawStaticLayers(bitmap, GeographyUnit.DecimalDegree);  
             mapEngine.DrawDynamicLayers(bitmap, GeographyUnit.DecimalDegree);  
             mapEngine.CloseAllLayers();  
  
             Map.Image = bitmap;  
         }  
  
         private void ToolBar_ButtonClick(object sender, ToolBarButtonClickEventArgs e)  
         {  
             switch (e.Button.Tag.ToString())  
             {  
                 case "Zoom In":  
                     mapEngine.CurrentExtent.ScaleDown(50);  
                     LabelLocation();  
                     break;  
                 case "Zoom Out":  
                     mapEngine.CurrentExtent.ScaleUp(50);  
                     LabelLocation();  
                     break;  
                 case "Full Extent":  
                     mapEngine.CurrentExtent = ExtentHelper.GetDrawingExtent(new RectangleShape(-180.0, 83.0, 180.0, -90.0), Map.Width, Map.Height);  
                     lblLocation.Text = "";  
                     break;  
                 case "Pan Left":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Left, 20);  
                     LabelLocation();  
                     break;  
                 case "Pan Right":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Right, 20);  
                     LabelLocation();  
                     break;  
                 case "Pan Up":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Up, 20);  
                     LabelLocation();  
                     break;  
                 case "Pan Down":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Down, 20);  
                     LabelLocation();  
                     break;  
                 default:  
                     break;  
             }  
             DrawImage();  
         }  
  
         private void btnClose_Click(object sender, EventArgs e)  
         {  
             this.Close();  
         }  
  
         private void Map_MouseMove(object sender, MouseEventArgs e)  
         {  
             //Displays the X and Y in screen coordinates.  
             statusStrip1.Items["toolStripStatusLabelScreen"].Text = "X:" + e.X + " Y:" + e.Y;  
  
             //Gets the PointShape in world coordinates from screen coordinates.  
             PointShape pointShape = ExtentHelper.ToWorldCoordinate(mapEngine.CurrentExtent, new ScreenPointF(e.X, e.Y), Map.Width, Map.Height);  
  
             //Displays world coordinates.  
             statusStrip1.Items["toolStripStatusLabelWorld"].Text = "(world) X:" + Math.Round(pointShape.X, 4) + " Y:" + Math.Round(pointShape.Y, 4);  
         }  
  
  
     }  
 }  
 </code>