form1.cs

提供了大量初学CSharp的示例

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using ESRI.MapObjects2.Core;

namespace LinePrj
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button button1;
		private ESRI.MapObjects2.Core.AxMap axMap1;
		private System.ComponentModel.IContainer components;

		private ESRI.MapObjects2.Core.MapLayer m_pCountiesLyr;
		private ESRI.MapObjects2.Core.MapLayer m_pCitiesLyr;
		private System.Windows.Forms.SaveFileDialog dlgSave;
		private ESRI.MapObjects2.Core.MapLayer layer;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private String m_dataPath = "D:/Program Files/ESRI/MapObjects2/Samples/Data/";

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			layer = new ESRI.MapObjects2.Core.MapLayerClass();
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
			this.button1 = new System.Windows.Forms.Button();
			this.axMap1 = new ESRI.MapObjects2.Core.AxMap();
			this.dlgSave = new System.Windows.Forms.SaveFileDialog();
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			((System.ComponentModel.ISupportInitialize)(this.axMap1)).BeginInit();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(472, 40);
			this.button1.Name = "button1";
			this.button1.TabIndex = 1;
			this.button1.Text = "线条";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// axMap1
			// 
			this.axMap1.Location = new System.Drawing.Point(16, 11);
			this.axMap1.Name = "axMap1";
			this.axMap1.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("axMap1.OcxState")));
			this.axMap1.Size = new System.Drawing.Size(408, 208);
			this.axMap1.TabIndex = 2;
			this.axMap1.MouseDownEvent += new ESRI.MapObjects2.Core.MouseDownEventHandler(this.axMap1_MouseDownEvent);
			this.axMap1.MouseMoveEvent += new ESRI.MapObjects2.Core.MouseMoveEventHandler(this.axMap1_MouseMoveEvent);
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(32, 232);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(240, 32);
			this.label1.TabIndex = 3;
			this.label1.Text = "label1";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(352, 226);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(192, 40);
			this.label2.TabIndex = 4;
			this.label2.Text = "label2";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(568, 273);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.label2,
																		  this.label1,
																		  this.axMap1,
																		  this.button1});
			this.Name = "Form1";
			this.Text = "Form1";
			this.Load += new System.EventHandler(this.Form1_Load);
			((System.ComponentModel.ISupportInitialize)(this.axMap1)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			if (CreateLineMapLayer())
				SaveData();
			this.axMap1.Layers.Add(layer);
			layer.Symbol.Color = Convert.ToUInt32(ESRI.MapObjects2.Core.ColorConstants.moRed);
			//this.axMap1.TrackingLayer.Refresh(true, null);
			this.axMap1.TrackingLayer.get_Symbol(0).Color = Convert.ToUInt32(ESRI.MapObjects2.Core.ColorConstants.moRed);
			//this.axMap1.TrackingLayer.Refresh(true, this.axMap1.TrackingLayer);
			this.axMap1.CtlRefresh();
		}

		private void Form1_Load(object sender, System.EventArgs e)
		{
			this.axMap1.ScrollBars = true;
			InitializeMapData();
			InitializeTrackingLayer();
		}

		private void InitializeMapData()
		{
			try 
			{
				System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default;
				ESRI.MapObjects2.Core.DataConnection dataConn = new ESRI.MapObjects2.Core.DataConnectionClass();
				string dataPath = ReturnDataPath("Northeast");
				dataConn.Database = dataPath;
				dataConn.Connect();
				if (dataConn.Connected)
				{
					this.m_pCountiesLyr = new ESRI.MapObjects2.Core.MapLayerClass();
					ESRI.MapObjects2.Core.GeoDataset gds = dataConn.FindGeoDataset("Counties");
					if (gds != null)
					{
						this.m_pCountiesLyr.GeoDataset = gds;
						this.m_pCountiesLyr.Symbol.Color = Convert.ToUInt32(ESRI.MapObjects2.Core.ColorConstants.moPaleYellow);
						this.axMap1.Layers.Add(this.m_pCountiesLyr);
					}
					this.m_pCitiesLyr = new ESRI.MapObjects2.Core.MapLayerClass();
					gds = dataConn.FindGeoDataset("Necenter");
					if (gds != null)
					{
						this.m_pCitiesLyr.GeoDataset = gds;
						this.m_pCitiesLyr.Symbol.Color = Convert.ToUInt32(ESRI.MapObjects2.Core.ColorConstants.moBlue);
						this.axMap1.Layers.Add(this.m_pCitiesLyr);
					}
				}
				if (this.axMap1.Layers.Count < 2)
				{
					MessageBox.Show("加载地图文件出错","错误");
				}
			} 
			catch (System.Exception e) 
			{
				MessageBox.Show(e.Message);
			}
			finally 
			{
				System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default;
			}
		}

		private string ReturnDataPath(string dataPath)
		{
			/*string basePath = Application.ExecutablePath;
			int index = basePath.LastIndexOf("Samples");
			if (index > -1)
			{
				return basePath.Substring(0, index + 8) + "Data\\" + dataPath;
			}
			else
				return null;*/
			return this.m_dataPath + dataPath;
		}

		private void InitializeTrackingLayer()
		{
			stdole.StdFont fnt = new stdole.StdFontClass();
			fnt.Name = "Wingdings";
			fnt.Bold = false;
			this.axMap1.TrackingLayer.SymbolCount = 2;
			this.axMap1.TrackingLayer.get_Symbol(0).Color = (uint)ESRI.MapObjects2.Core.ColorConstants.moBlue;
			this.axMap1.TrackingLayer.get_Symbol(0).Style = (short)ESRI.MapObjects2.Core.MarkerStyleConstants.moTrueTypeMarker;
			this.axMap1.TrackingLayer.get_Symbol(0).Font = fnt;
			this.axMap1.TrackingLayer.get_Symbol(0).Size = 16;
			this.axMap1.TrackingLayer.get_Symbol(0).CharacterIndex = 88;

			this.axMap1.TrackingLayer.get_Symbol(1).Color = (uint)ESRI.MapObjects2.Core.ColorConstants.moPurple;
			this.axMap1.TrackingLayer.get_Symbol(1).Style = (short)ESRI.MapObjects2.Core.MarkerStyleConstants.moTrueTypeMarker;
			this.axMap1.TrackingLayer.get_Symbol(1).Font = fnt;
			this.axMap1.TrackingLayer.get_Symbol(1).Size = 16;
			this.axMap1.TrackingLayer.get_Symbol(1).CharacterIndex = 88;
		}

		private bool CreateLineMapLayer()
		{
			bool result = false;
			try
			{
				// Exports the layer (along with it's PRJ file) to the currently selected
				// coordinate system.
				this.dlgSave.Filter = "ESRI Shapefiles (*.shp)|*.shp";
				this.dlgSave.Title = "Save projected layer as...";
				if (dlgSave.ShowDialog(this) == DialogResult.OK)
				{
					if (dlgSave.FileName != null)
					{
						// Export the layer's records to the selected Coordinatesystem.
						this.Cursor = System.Windows.Forms.Cursors.WaitCursor;
						ESRI.MapObjects2.Core.DataConnection dc ;
						dc = new ESRI.MapObjects2.Core.DataConnectionClass();
						ESRI.MapObjects2.Core.GeoDataset gds;//= new ESRI.MapObjects2.Core.GeoDatasetClass();

						//MessageBox.Show(dlgSave.FileName);
						string path = dlgSave.FileName.Substring(0, dlgSave.FileName.Length - 7);
						//MessageBox.Show(path);
						dc.Database = path;
						dc.Connect();
						if (!dc.Connected)
						{
							MessageBox.Show("请指定已经有的文件");
						}
						else
						{
							ESRI.MapObjects2.Core.TableDesc tabDesc = new ESRI.MapObjects2.Core.TableDescClass();
							tabDesc.FieldCount = 2;
							//tabDesc.set_FieldLength(0,10);
							tabDesc.set_FieldName(0, "X");
							tabDesc.set_FieldType(0, ESRI.MapObjects2.Core.FieldTypeConstants.moDouble);
							tabDesc.set_FieldPrecision(0, 10);
							tabDesc.set_FieldScale(0, 3);

							//tabDesc.set_FieldLength(1, 10);
							tabDesc.set_FieldName(1, "Y");
							tabDesc.set_FieldType(1, ESRI.MapObjects2.Core.FieldTypeConstants.moDouble);
							tabDesc.set_FieldPrecision(1, 10);
							tabDesc.set_FieldScale(1, 3);
							String fileName = "xia"; 
							gds = dc.AddGeoDataset(fileName, ESRI.MapObjects2.Core.ShapeTypeConstants.moShapeTypeLine,
								tabDesc, null,null);
							if (gds != null)
								MessageBox.Show(gds.ToString());
							layer.GeoDataset = gds;
							dc.Disconnect();
							result = true;
						}
					}
				}
			}
			catch (System.Runtime.InteropServices.ExternalException COMEx)
			{
				MessageBox.Show(COMEx.ErrorCode + ": " + COMEx.Message);
			}
			catch (System.Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
			finally
			{
				this.Cursor = System.Windows.Forms.Cursors.Default;
			}
			return result;
		}

		private void SaveData()
		{
			try
			{
				ESRI.MapObjects2.Core.Field xField ;
				//xField = new ESRI.MapObjects2.Core.FieldClass();
				ESRI.MapObjects2.Core.Field yField;// = new ESRI.MapObjects2.Core.FieldClass();
				ESRI.MapObjects2.Core.Field shapeField;// = new ESRI.MapObjects2.Core.FieldClass();
				ESRI.MapObjects2.Core.Fields fields;// = new ESRI.MapObjects2.Core.FieldsClass();
				ESRI.MapObjects2.Core.Recordset rs = layer.Records;
				rs.AutoFlush = false;
				fields = rs.Fields;
				shapeField = fields.Item("Shape");
				xField = fields.Item("X");
				yField = fields.Item("Y");

				ESRI.MapObjects2.Core.Line line = new ESRI.MapObjects2.Core.LineClass();
				ESRI.MapObjects2.Core.Point pt = new ESRI.MapObjects2.Core.PointClass();
				ESRI.MapObjects2.Core.Points pts = new ESRI.MapObjects2.Core.PointsClass();
				//pt.X = this.axMap1.Extent.Left;
				//pt.Y = (this.axMap1.Extent.Top - this.axMap1.Extent.Height) / 2;
				pt.X = 1181604.156d;
				pt.Y = 2298957.796d;
				pts.Add(pt);
				
			
				//pts = new ESRI.MapObjects2.Core.PointsClass();
				//pt.X = this.axMap1.Extent.Left + this.axMap1.Extent.Width / 400;
				//pt.Y = (this.axMap1.Extent.Top - this.axMap1.Extent.Height) / 20;
				pt.X = 2394976.10558d;
				pt.Y = 2574260.6747d;
				pts.Add(pt);

				pt.X = 2078887.6153d;
				pt.Y = 2089931.5363d;
				pts.Add(pt);

				line.Parts.Add(pts);
				rs.AddNew();
				shapeField.Value = line;
				xField.Value = pt.X;
				yField.Value = pt.Y;
				rs.Update();

				/*pts = new ESRI.MapObjects2.Core.PointsClass();
				pt = this.axMap1.Extent.Center;
				pts.Add(pt);
				line.Parts.Add(pts);
				rs.AddNew();
				shapeField.Value = line;
				xField.Value = pt.X;
				yField.Value = pt.Y;
				rs.Update();

				pts = new ESRI.MapObjects2.Core.PointsClass();
				pt.X = this.axMap1.Extent.Center.X + this.axMap1.Extent.Width / 40;
				pt.Y = (this.axMap1.Extent.Top - this.axMap1.Extent.Height / 4)/20;
				pts.Add(pt);
				line.Parts.Add(pts);
				rs.AddNew();
				shapeField.Value = line;
				xField.Value = pt.X;
				yField.Value = pt.Y;
				rs.Update();

				pts = new ESRI.MapObjects2.Core.PointsClass();
				pt.X = this.axMap1.Extent.Right ;
				pt.Y = this.axMap1.Extent.Height ;
				pts.Add(pt);
				line.Parts.Add(pts);
				rs.AddNew();
				shapeField.Value = line;
				xField.Value = pt.X;
				yField.Value = pt.Y;
				rs.Update();*/
				rs.AutoFlush = true;
			}
			catch (System.Runtime.InteropServices.COMException com)
			{
				MessageBox.Show("保存数据出错" + com.Message);
				return;
			}
			catch (System.Exception ex)
			{
				MessageBox.Show(ex.Message );
				return;
			}
		}

		private void axMap1_MouseDownEvent(object sender, ESRI.MapObjects2.Core.MouseDownEventArgs e)
		{
		
		}

		private void axMap1_MouseMoveEvent(object sender, ESRI.MapObjects2.Core.MouseMoveEventArgs e)
		{
			ESRI.MapObjects2.Core.Point pt = this.axMap1.ToMapPoint(e.x, e.y);
			this.label1.Text = pt.X + " " + pt.Y;
			this.label2.Text = e.x + " " + e.y;
		}
	}

}