ArcEngine 打开AutoCAD文件的几种方法

方法一、

IWorkspaceFactory pWorkspaceFactory;

IFeatureWorkspace pFeatureWorkspace;

IFeatureLayer pFeatureLayer;

IFeatureDataset pFeatureDataset;

//打开CAD数据集

pWorkspaceFactory = new CadWorkspaceFactoryClass();

pFeatureWorkspace = (IFeatureWorkspace)pWorkspaceFactory.OpenFromFile(directoryPath, 0);

//打开一个要素集

pFeatureDataset = pFeatureWorkspace.OpenFeatureDataset(fileName);

//IFeaturClassContainer可以管理IFeatureDataset中的每个要素类

IFeatureClassContainer pFeatureClassContainer = (IFeatureClassContainer)pFeatureDataset;

//对CAD文件中的要素进行遍历处理

for (int i = 0; i < pFeatureClassContainer.ClassCount - 1; i++)

{

IFeatureClass pFeatureClass = pFeatureClassContainer.get_Class(i);

if (pFeatureClass.FeatureType == esriFeatureType.esriFTAnnotation)

{

//如果是注记，则添加注记层

pFeatureLayer = new CadAnnotationLayerClass();

}

else//如果是点、线、面，则添加要素层

{

pFeatureLayer = new FeatureLayerClass();

pFeatureLayer.Name = pFeatureClass.AliasName;

pFeatureLayer.FeatureClass = pFeatureClass;

this.axmc_Main.Map.AddLayer(pFeatureLayer);

this.axmc_Main.ActiveView.**();

}

}

方法二、

//--定义工作空间，并用CadWorkspaceFactoryClass()实例化它

IWorkspaceFactory pWorkspaceFactory = new CadWorkspaceFactoryClass();

//--打开相应的工作空间，并赋值给要素空间，OpenFromFile（）

//--中的参数为CAD文件夹的路径

IFeatureWorkspace pFeatureWorkspace = pWorkspaceFactory.OpenFromFile(directoryPath, 0) as IFeatureWorkspace;

/*--打开线要素类，如果要打开点类型的要素，需要把下边的代码该成：

*-- IFeatureClass pFeatureClass = pFeatureWorkspace.OpenFeatureClass (fileName + ":point");

*-- 由此可见fileName为CAD图的名字，后边加上要打开的要素类的类型，中间用冒号

*-- 隔开，大家可以想想多边形和标注是怎么打开的。 */

//point polyline

IFeatureClass pFeatureClass = pFeatureWorkspace.OpenFeatureClass(fileName + ":point");

IFeatureLayer pFeatureLayer = new FeatureLayerClass();

pFeatureLayer.FeatureClass = pFeatureClass;

this.axmc_Main.Map.AddLayer(pFeatureLayer);

this.axmc_Main.ActiveView.**();

方法三、

/*--下边的两行代码是定义一个CAD工作空间，然后打开它，但这次不是赋值给

--IFeatureWorkspace对象,而是赋值给IWorkspace定义的对象*/

IWorkspaceFactory pWorkspaceFactory = new CadWorkspaceFactoryClass();

IWorkspace pWorkspace = pWorkspaceFactory.OpenFromFile(directoryPath, 0);

//--定义一个CAD画图空间，并把上边打开的工作空间赋给它

ICadDrawingWorkspace pCadDrawingWorkspace = pWorkspace as ICadDrawingWorkspace;

//--定义一个CAD的画图数据集，并且打开上边指定的工作空间中一幅CAD图

//--然后赋值给CAD数据集

ICadDrawingDataset pCadDrawingDataset = pCadDrawingWorkspace.OpenCadDrawingDataset(fileName);

//--通过ICadLayer类，把上边得到的CAD数据局赋值给ICadLayer类对象的

//--CadDrawingDataset属性

ICadLayer pCadLayer = new CadLayerClass();

pCadLayer.CadDrawingDataset = pCadDrawingDataset;

//--利用MapControl加载CAD层

this.axmc_Main.Map.AddLayer(pCadLayer);

this.axmc_Main.ActiveView.**();

方法四、

IWorkspaceFactory pWorkspaceFactory = new CadWorkspaceFactoryClass();

IFeatureWorkspace pFeatureWorkspace = pWorkspaceFactory.OpenFromFile(directoryPath, 0) as IFeatureWorkspace;

IFeatureDataset pFeatureDataset = pFeatureWorkspace.OpenFeatureDataset(fileName);

IFeatureClassContainer pFeatureClassContainer = (IFeatureClassContainer)pFeatureDataset;

for (int i = 0; i < pFeatureClassContainer.ClassCount - 1; i++)

{

IFeatureClass pFeatureClass = pFeatureClassContainer.get_Class(i);

IFeatureLayer pFeatureLayer = new FeatureLayerClass();

pFeatureLayer.FeatureClass = pFeatureClass;

//ICadLayer pCadLayer = new CadLayerClass();

//pCadLayer = pFeatureLayer as ICadLayer;

this.axmc_Main.Map.AddLayer(pFeatureLayer);

this.axmc_Main.ActiveView.**();

}

方法五、

//Add passed file to MapControl

ICadDrawingDataset pCadDrawingDataset = GetCadDrawingDataset(directoryPath, fileName);

if (pCadDrawingDataset == null) return;

ICadLayer pCadLayer = new CadLayerClass();

pCadLayer.CadDrawingDataset = pCadDrawingDataset;

pCadLayer.Name = fileName;

this.axmc_Main.AddLayer(pCadLayer, 0);

/// <summary>

/// 获取记录集

/// </summary>

/// <param name="directoryPath"></param>

/// <param name="fileName"></param>

/// <returns></returns>

private ICadDrawingDataset GetCadDrawingDataset(string directoryPath, string fileName)

{

//Create a WorkspaceName object

IWorkspaceName pWorkspaceName = new WorkspaceNameClass();

pWorkspaceName.WorkspaceFactoryProgID = "esriDataSourcesFile.CadWorkspaceFactory";

pWorkspaceName.PathName = directoryPath;

//Create a CadDrawingName object

IDatasetName pDatasetName = new CadDrawingNameClass();

pDatasetName.Name = fileName;

pDatasetName.WorkspaceName = pWorkspaceName;

//Open the CAD drawing

IName pName = (IName)pDatasetName;

return (ICadDrawingDataset)pName.Open();

}