C# AE开发入门及加载矢量和栅格图片

C# AE开发入门及加载矢量和栅格图片

一、实验目的
加载矢量（Shapefile、DXF）和栅格图片（TIFF）
二、实验步骤
主要步骤：
–创建UI：MapControl、LicenseControl；
–绑定运行时；
–添加引用

（一）配置开发环境，添加引用，运行基本界面

1. 打开VS2012，新建windows窗体程序
   
2. 在工具箱——〉容器下拖入一个SplitContainer容器
3. 在工具箱——〉ArcGIS Windows Forms下拖入一个MapControl控件，并将其DOCK属性改为FILL即可
   
4. 在工具箱——〉ArcGIS Windows Forms下拖入一个LicenseControl控件（运行时不可见）5.在程序入口代码（Program.cs）处添加绑定，在Application.Run(new Form1()); 前添加一行ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.EngineOrDesktop);
5. 添加引用，在引用上右键，选择Add ArcGIS Reference，在Engine（Core）下添加以下几个引用：

ESRI.ArcGIS.Geodatabase;
ESRI.ArcGIS.DataSourcesRaster;
ESRI.ArcGIS.DataSourcesFile;
ESRI.ArcGIS.DataSourcesGDB;

7. 在Form1.cs下添加下列引用命名空间
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.DataSourcesFile;
using ESRI.ArcGIS.DataSourcesGDB;
using ESRI.ArcGIS.DataSourcesRaster;
8. 添加三个按钮控件，并分别修改按钮文本为：AddSHP，AddCAD，AddTIFF

9. 运行至如下界面

（二）实现按钮加载图片功能
1.加载Shapefile文件

private void button1_Click(object sender, EventArgs e)
        {
            //打开文件对话框，选择shp文件
            OpenFileDialog of = new OpenFileDialog();
            of.Filter = "*(.shpfile)|*.shp";
            of.Title = "打开shp文件";

            string path;
            string name;
            if (of.ShowDialog() == DialogResult.OK)
            {
                path = System.IO.Path.GetDirectoryName(of.FileName);
                name = System.IO.Path.GetFileName(of.FileName);

            }
            else return;

            //新建一个Shapefile工厂类
            IWorkspaceFactory pWF; 
            pWF = new ShapefileWorkspaceFactoryClass();

            //使用工厂类打开一个工作空间
           
            IWorkspace pW = pWF.OpenFromFile(path, 0);

            //将工作空间强制转换为要素工作空间
            IFeatureWorkspace pFW = (IFeatureWorkspace)pW;

            //定义要素类并从要素工作空间打开一个Shapefile
            IFeatureClass pFC = pFW.OpenFeatureClass(name);

            //新建FeatureLayerClass，并将shapefile要素加载到要素图层类
            IFeatureLayer pFlyr = new FeatureLayerClass();
            pFlyr.FeatureClass = pFC;

            //将要素图层加入mapcontrol并刷新
            axMapControl1.AddLayer(pFlyr);
            axMapControl1.ActiveView.Refresh();
        }

运行结果


2.加载TIFF文件

private void button2_Click(object sender, EventArgs e)
        {
            //打开文件对话框，选择tif文件
            OpenFileDialog of = new OpenFileDialog();
            of.Filter = "*(.tif)|*.tif";
            of.Title = "打开tif文件";

            string path;
            string name;
            if (of.ShowDialog() == DialogResult.OK)
            {
                path = System.IO.Path.GetDirectoryName(of.FileName);
                name = System.IO.Path.GetFileName(of.FileName);
            }
            else return;

            //新建一个Raster工厂类
            IWorkspaceFactory workspcFac = new RasterWorkspaceFactory();

            //使用工厂类打开一个栅格工作空间
            IRasterWorkspace rasterWorkspc;
            rasterWorkspc = workspcFac.OpenFromFile(path, 0) as IRasterWorkspace;
            //新建栅格数据集和栅格图层   
         
            IRasterDataset rasterDataset = new RasterDatasetClass();
            IRasterLayer rasterLay = new RasterLayerClass();

            //从栅格工作空间选择要的打开tiff文件并将数据集中的文件加载到图层上
            rasterDataset = rasterWorkspc.OpenRasterDataset(name);
            rasterLay.CreateFromDataset(rasterDataset );

            //将栅格图层加入mapcontrol并刷新
            axMapControl1.AddLayer(rasterLay );
            axMapControl1.Refresh();
        }

运行结果

3. 加载DXF文件

        private void button3_Click(object sender, EventArgs e)
        {
            //打开文件对话框，选择dxf文件
            OpenFileDialog of = new OpenFileDialog();
            of.Filter = "*(.dxf)|*.dxf";
            of.Title = "打开cad文件";
            string path;
            string name;
            if (of.ShowDialog() == DialogResult.OK)
            {
                path = System.IO.Path.GetDirectoryName(of.FileName);
                name = System.IO.Path.GetFileName(of.FileName);
            }
            else return;

            //新建CAD工厂类
            CadWorkspaceFactoryClass fac = new CadWorkspaceFactoryClass();
            
            //定义要素工作空间
            IFeatureWorkspace space = fac.OpenFromFile(path ,0) as IFeatureWorkspace ;
           
            //加载面
            IFeatureClass polygon = space.OpenFeatureClass(name+":Polygon");
            IFeatureLayer layer3 = new CadFeatureLayerClass();
            layer3 = new CadFeatureLayerClass();
            layer3.FeatureClass = polygon;
           
            //加载线
            IFeatureClass polyline = space.OpenFeatureClass(name + ":Polyline");
            IFeatureLayer layer = new CadFeatureLayerClass();
            layer.FeatureClass = polyline;
            
            //加载点
            IFeatureClass point = space.OpenFeatureClass(name+":Point");
            IFeatureLayer layer2 = new CadFeatureLayerClass();
            layer2 = new CadFeatureLayerClass();
            layer2.FeatureClass = point;     
                 
            //加载注记
            IFeatureClass anno = space.OpenFeatureClass(name+":Annotation");
            IFeatureLayer layer4 = new CadFeatureLayerClass();
            layer4 = (IFeatureLayer) new CadAnnotationLayer();
            layer4.FeatureClass = anno;

            axMapControl1.AddLayer(layer3);
            axMapControl1.AddLayer(layer);
            axMapControl1.AddLayer(layer2);
            axMapControl1.AddLayer(layer4);
            axMapControl1.Refresh();
        }

运行结果

4.注意事项
（1）如果报以下错误，在引用Carto时将嵌入互操作类型改为False即可
（2）加载CAD文件注记和点线面分别加载，加载注记时不能直接使用CadFeatureLayerClass，需要用CadAnnotationLayer，然后将其强制转换为IFeatureLayer。
（3）对话框如果不进行选择文件需返回原来的窗口而不能报错。