AE10.2与C#2012开发

此实例是以ArcEngine为平台，在Visual C#的集成开发环境下进行开发的一个简单实例。目的是让大家初步了解二次开发的大致过程。此实例要求达到的功能是：搭建系统的基本框架，实现地图控件（MapControl)、工具栏控件(ToolbarControl)、图层管理控件(TocControl)之间的交互操作，同时实现地图加载、全屏显示、放大、缩小、漫游等基本的GIS功能。
2.1 代码展示
2.1.1 主应用程序

namespace ZY
{
    static class Program
    {
        private static LicenseInitializer m_AOLicenseInitializer = new ZY.LicenseInitializer();
        /// 

        /// 应用程序的主入口点。
        /// 
        [STAThread]
        static void Main()
        {
            //ESRI License Initializer generated code.
            m_AOLicenseInitializer.InitializeApplication(new esriLicenseProductCode[] { esriLicenseProductCode.esriLicenseProductCodeEngine },
            new esriLicenseExtensionCode[] { });
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
            //ESRI License Initializer generated code.
            //Do not make any call to ArcObjects after ShutDownApplication()
            m_AOLicenseInitializer.ShutdownApplication();
        }
    }
}
2.1.2  引用arcengine组件库

2.1.3 实现打开shp文件的功能，添加openFileDialog1控件

private void menuAddShp_Click(object sender, EventArgs e)
        {               
                IWorkspaceFactory pWorkspaceFactory = new ShapefileWorkspaceFactory();
                //添加文件过滤器选择后缀.shp
                openFileDialog1.Filter = "ShapeFile文件(*.shp)|*.shp";
                //设置文件对话框的初始路径
                openFileDialog1.InitialDirectory = @"C:\Program Files (x86)\ArcGIS\DeveloperKit10.2\Samples\data\World";
                //示例数据文件夹
                openFileDialog1.Multiselect = false;
                DialogResult pDialogResult = openFileDialog1.ShowDialog();
                if (pDialogResult != DialogResult.OK)
                    return;
                //获取文件名与路径
                string pPath = openFileDialog1.FileName;
                string pFolder = System.IO.Path.GetDirectoryName(pPath);
                string pFileName = System.IO.Path.GetFileName(pPath);

                IWorkspace PWorkspace = pWorkspaceFactory.OpenFromFile(pFolder, 0);
                IFeatureWorkspace pFeatureWorkspace = pWorkspaceFactory as IFeatureWorkspace;
                IFeatureClass pFC = pFeatureWorkspace.OpenFeatureClass(pFileName);
                IFeatureLayer pFLayer = new FeatureLayerClass();
                pFLayer.FeatureClass = pFC;
                pFLayer.Name = pFC.AliasName;
                ILayer pLayer = pFLayer as ILayer;
                IMap pMap = axMapControl1.Map;
                pMap.AddLayer(pLayer);
                axMapControl1.ActiveView.Refresh();

                /*IWorkspace pWorkspace1 = pWorkspaceFactory.OpenFromFile(@"C:\Program Files (x86)\ArcGIS\DeveloperKit10.2\Samples\data\World", 0);
                IFeatureWorkspace pFeatureWorkspace = pWorkspace1 as IFeatureWorkspace;
                IFeatureClass pFC = pFeatureWorkspace.OpenFeatureClass("world30.shp");
                IFeatureLayer pFLayer = new FeatureLayerClass();
                pFLayer.FeatureClass = pFC;
                pFLayer.Name = pFC.AliasName;
                ILayer pLayer=pFLayer as */      
        }
2.1.4  实现打开地图文档mxd```
private void
```adMapDocument()
        {
            //利用System中OpenFileDialog方法，显示一个对话框，提示用户打开文件
            System.Windows.Forms.OpenFileDialog openFileDialog;
            openFileDialog = new OpenFileDialog();
            openFileDialog.InitialDirectory = m_Path;
            //对话框结果不为OK不往下进行
            DialogResult DR=openFileDialog.ShowDialog();
            //设置对话框的名称
            openFileDialog.Title = "打开地图文档";
            //获取或设置当前文件名筛选器字符串，来决定打开文件的类型为*.Mxd
            openFileDialog.Filter = "map documents(*.mxd)|*.mxd";
            //判断，如果对话框结果不为OK的话不继续往下进行
            if (DR != DialogResult.OK)
                return;

            //获取文件的路径filePath以及文件名称
            string filePath = openFileDialog.FileName;
            if (axMapControl1.CheckMxFile(filePath))
            {
                //定义axMapControl控制鼠标指针选项为沙漏光标
                axMapControl1.MousePointer = esriControlsMousePointer.esriPointerHourglass;
                //传入LoadMxFlie方法的三个参数，filePath—文件路径；0—地图名称或索引；Type.Missing—通过反射进行调用获取参数的默认值
                axMapControl1.LoadMxFile(filePath, 0, Type.Missing);
                //定义axMapControl控制鼠标指针为默认箭头
                axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
                axMapControl1.Extent = axMapControl1.FullExtent;
            }
            else
            {
                MessageBox.Show(filePath + "不是有效的地图文档");
            }
        }
2.1.5  添加mdb数据


 public void Open

WorkspaceFromFileAccess(string clsName, string DBPath)
        {   
            //新建一个Access的工作空间工厂
            IWorkspaceFactory workspaceFactory = new AccessWorkspaceFactoryClass();
            //根据Access路径打开一个Access工作空间工厂，获得工作空间对象
            IWorkspace workspace = workspaceFactory.OpenFromFile(DBPath, 0);
            IFeatureWorkspace accessWorkspace = workspace as IFeatureWorkspace;
            //打开图层名为clsName的数据集，获取其要素类对象FeatureClass
            IFeatureClass tFeatureClass = accessWorkspace.OpenFeatureClass(clsName);
            //实例化一个图层（IFeatureLayer）对象素类
            //该对象类用于装载被打开的tFeatureClass，最后axMapControl控件上显示
            IFeatureLayer pFtLayer =new FeatureLayerClass() ;
            pFtLayer.FeatureClass= tFeatureClass  ;
            pFtLayer.Name = clsName;
            axMapControl1.AddLayer(pFtLayer);              
        }
2.2  打开效果
2.2.1  系统界面

系统添加了打开，另存为，缩放，漫游，全图等控件。
2.2.2  读取自带world.lyr数据

2.2.3  系统2.0版本，加载mxd文档，shp文件，mdb空间数据文件

2.3  实现二次开发的图像绘制功能
2.3.1  打开美国地图mxd文件，漫游至加州

2.3.2  线段绘制实现代码
  private void 线ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //设置枚举变量的绘制几何图形类型
            oprFlag = Operation.ConstructionPolyLine;//对应上述所定义的枚举Operation
            geoCollection = new PolylineClass();
            ptCollection = new PolylineClass();
        }
private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
        {
            //类型声明       
            missing = Type.Missing; 
            //若为添加折线事件
            if (oprFlag == Operation.ConstructionPolyLine)
            {
                //axMapControl1控件的当前控件为指针（null）
                axMapControl1.CurrentTool = null;
                //通过AddPoint方法从GetPoint函数中获取鼠标单击的坐标
                ptCollection.AddPoint(GetPoint(e.mapX, e.mapY), ref missing, ref missing);
                //定义几何类型绘制折线的方法
                Geometry = axMapControl1.TrackLine();

                //通过addFeature函数的两个参数，Highways—绘制折线的图层；Geometry—绘制的几何折线
                AddFeature("Highways", Geometry);
                //折线添加完成之后结束编辑状态
                oprFlag = Operation.Nothing;
解读一些简单的Python代码
3.1  Demo1\04批量删除gdb中的数据   
import arcpy;
from arcpy import env
env.workspace=r'C:\Users\yanrui\Documents\ArcGIS\Default.gdb'
fcs = arcpy.ListFeatureClasses()
for fc in fcs:
    arcpy.Delete_management(fc)
ArcPy 是一个以成功的 arcgisscripting 模块为基础并继承了 arcgisscripting 功能进而构建而成的站点包。目的是为以实用高效的方式通过 Python 执行地理数据分析、数据转换、数据管理和地图自动化创建基础。
3.2  使用 Python 内置的 len 函数来获取该数值
import arcpy

arcpy.env.workspace = "c:/ Shapefiles"

fcs = arcpy.ListFeatureClasses()
fcCount = len(fcs)
print fcCount
3.3  列出工作空间中所有以字母 G 开头的要素类
import arcpy

arcpy.env.workspace = "D:/ data.gdb"
fcs = arcpy.ListFeatureClasses("G*")
3.4  为文件夹内形式为标记图像文件格式 (TIFF) 图像的所有栅格创建栅格金字塔
arcpy.env.workspace= "D:/ images"
#
for tiff in arcpy.ListRasters("*", "TIF"): 
    # Create pyramids
    #
    arcpy.BuildPyramids_management(tiff)
3.5  Python插入多边形数据
import arcpy
f=open(r'C:\data.txt')
cursor=arcpy.InsertCursor(r'C:\Data\polygon.shp')
array=arcpy.Array()
point=arcpy.Point()
for line in f:
    pt=line.split()
    str = pt[3].split(';')
    name = pt[1]
    for j in str:
        xy = j.split(',')
        point.X = float(xy[0]);
        point.Y = float(xy[1])
        array.add(point)
    row = cursor.newRow()
    row.shape = array
    row.name = name
    array.removeAll() 
    cursor.insertRow(row)