MapPoint

ZIP Code and City Finder Sample in C#

External

Working with locations (finding them) http://msdn.microsoft.com/library/en-us/mappoint2004/BIZAPILocation.asp?frame=true
MSDN Programming MapPoint pages http://msdn.microsoft.com/library/default.asp?url=/library/en-us/mappoint2004/BIZAboutProgramming.asp
The MSDN site about using it http://msdn.microsoft.com/mappoint/
Finding a place on the map
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/mappoint2004/ALLFindPlace.asp
MP2K (Magazine for MapPoint) http://www.mp2kmag.com/
Calling MapPoint From C++ Without the MFC Safety Net http://www.mp2kmag.com/a106--c++.without.mfc.mappoint.html

ZIP Code and City Finder Sample in C#

The reference article (in VB) is here:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnmap04/html/ZIPtoCity.asp

Here is the C# version of it:

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace Lookup
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Button button1;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(16, 16);
			this.textBox1.Name = "textBox1";
			this.textBox1.TabIndex = 0;
			this.textBox1.Text = "";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(16, 56);
			this.button1.Name = "button1";
			this.button1.TabIndex = 1;
			this.button1.Text = "Find City";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(292, 266);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.button1,
																		  this.textBox1});
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private MapPoint.Location FindCityForZipCode( string strZipCode, MapPoint.Map oMap)
		{
			MapPoint.Location		oZipLoc;
			MapPoint.FindResults	oZipResults;

			oZipResults = oMap.FindAddressResults( null, null, null, null, strZipCode, "USA");

			if ( MapPoint.GeoFindResultsQuality.geoFirstResultGood == oZipResults.ResultsQuality) {
				IEnumerator at = oZipResults.GetEnumerator();
				if ( !at.MoveNext()) {
					return null;
				}
				oZipLoc = (MapPoint.Location) at.Current;
			} else {
				return null;
			}

			if ( MapPoint.GeoShowDataBy.geoShowByPostal1 != oZipLoc.Type) {
				// not a zip code match
				return null;
			}

			oZipLoc.GoTo();
			int x;
			int y;
			x = oMap.LocationToX(oZipLoc);
			y = oMap.LocationToY(oZipLoc);

			MapPoint.FindResults oContext;
			oContext = oMap.ObjectsFromPoint( x, y);

			MapPoint.Location obj;

			for( IEnumerator at = oContext.GetEnumerator(); at.MoveNext(); ) {
				obj = (MapPoint.Location) (at.Current);
				if ( MapPoint.GeoShowDataBy.geoShowByCity == obj.Type) {
					return obj;
				}
			}

			for( IEnumerator at = oContext.GetEnumerator(); at.MoveNext(); ) {
				obj = (MapPoint.Location) (at.Current);
				if ( MapPoint.GeoShowDataBy.geoShowByRegion2 == obj.Type) {
					return obj;
				}
			}

			return null;
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			MapPoint.Application	oApp;
			MapPoint.Location		oCityLoc;
			MapPoint.Map			oMap;

			oApp = new MapPoint.Application();
			oMap = oApp.ActiveMap;

			oMap.Application.Visible = true;
			oMap.Application.UserControl = true;

			string strZipCode  = textBox1.Text;

			oCityLoc = FindCityForZipCode( strZipCode, oMap);

			System.Windows.Forms.MessageBox.Show( "Got " + oCityLoc.Name);
		}
	}
}