转自原文c# 调用ArcEngine的GP工具，AE调用GP工具
IAoInitialize m_AoInitialize = new AoInitializeClass(); esriLicenseStatuslicenseStatus = esriLicenseStatus.esriLicenseUnavailable; licenseStatus = m_AoInitialize.Initialize(esriLicenseProductCode.esriLicenseProductCodeArcInfo); if (licenseStatus == esriLicenseStatus.esriLicenseCheckedOut) { GeoprocessortGp = newGeoprocessor(); tGp.OverwriteOutput = true; licenseStatus = m_AoInitialize.IsExtensionCodeAvailable(esriLicenseProductCode.esriLicenseProductCodeEngine,esriLicenseExtensionCode.esriLicenseExtensionCodeSpatialAnalyst); licenseStatus = m_AoInitialize.CheckOutExtension(esriLicenseExtensionCode.esriLicenseExtensionCodeSpatialAnalyst); //LICenced arcengine ESRI.ArcGIS.ConversionTools.ASCIIToRastertASC = newESRI.ArcGIS.ConversionTools.ASCIIToRaster(); tASC.data_type = "FLOAT"; tASC.in_ascii_file = pWorkSpacePath + @"a1.txt"; tASC.out_raster = pWorkSpacePath + "a1.img"; //ScrollToBottom("ASCIIToRaster"); IGeoProcessorResulttGeoResult = (IGeoProcessorResult)tGp.Execute(tASC, null); if (tGeoResult.Status == ESRI.ArcGIS.esriSystem.esriJobStatus.esriJobSucceeded) { ESRI.ArcGIS.SpatialAnalystTools.ReclassifytReclass = newESRI.ArcGIS.SpatialAnalystTools.Reclassify(); tReclass.in_raster = pWorkSpacePath + "a1.img"; tReclass.missing_values = "NODATA"; tReclass.out_raster = pWorkSpacePath + @"Out3.img"; tReclass.reclass_field = "VALUE"; tReclass.remap = "0 958 10;958 988 20;988 990 30;990 1000 40;1000 1100 50"; // ScrollToBottom("Reclassify"); tGeoResult = (IGeoProcessorResult)tGp.Execute(tReclass, null); if (tGeoResult.Status == ESRI.ArcGIS.esriSystem.esriJobStatus.esriJobSucceeded) { ESRI.ArcGIS.ConversionTools.RasterToPolygontRTP = newESRI.ArcGIS.ConversionTools.RasterToPolygon(); tRTP.in_raster = pWorkSpacePath + "Out3.img"; tRTP.out_polygon_features = pWorkSpacePath + "a2_shp.shp"; tRTP.raster_field = "VALUE"; tRTP.simplify = "SIMPLIFY"; //ScrollToBottom("RasterToPolygon"); tGeoResult = (IGeoProcessorResult)tGp.Execute(tRTP, null); if (tGeoResult.Status == ESRI.ArcGIS.esriSystem.esriJobStatus.esriJobSucceeded) { licenseStatus = m_AoInitialize.CheckInExtension(esriLicenseExtensionCode.esriLicenseExtensionCodeSpatialAnalyst); { ESRI.ArcGIS.DataManagementTools.SmoothPolygontSP = newESRI.ArcGIS.DataManagementTools.SmoothPolygon(); tSP.algorithm = "PAEK"; tSP.in_features = pWorkSpacePath + "a2_shp.shp"; tSP.out_feature_class = pWorkSpacePath + "a2_shp_smooth.shp"; tSP.tolerance = "2"; tSP.endpoint_option = "FIXED_ENDPOINT"; tSP.error_option = "FLAG_ERRORS"; ScrollToBottom("SmoothPolygon"); tGeoResult = (IGeoProcessorResult)tGp.Execute(tSP, null); } } } } // arcengine liencesd 当使用高版本的liencesd在使用中，如果需要低版本的liencesd，需要动态签出liencesd，不然将不会执行成功！ // writeMessage(tGp); } MessageBox.Show("ok");
Geoprocessing是ArcGIS提供的一个非常实用的工具，借由Geoprocessing工具可以方便的调用ArcToolBox中提供的各类工具，本文在ArcEngine9.2平台环境下总结了调用ArcToolBox工具的使用方法：
1、调用ArcToolBox工具方法
以ArcToolBox->Analysis Tools->Proximity->Buffer工具的调用为例，C#代码如下：
using ESRI.ArcGIS.AnalysisTools; //添加引用
using ESRI.ArcGIS.Geoprocessor;
Geoprocessor gp = new Geoprocessor(); //初始化Geoprocessor
gp.OverwriteOutput = true; //允许运算结果覆盖现有文件
ESRI.ArcGIS.AnalysisTools.Buffer pBuffer = new ESRI.ArcGIS.AnalysisTools.Buffer(); //定义Buffer工具
pBuffer.in_features = pVorLineLayer; //输入对象，既可是IFeatureLayer对象，也可是完整文件路径如“D:\\data.shp”
pBuffer.out_feature_class = pBuffer; //输出对象，一般是包含输出文件名的完整文件路径，如“D:\\buffer.shp”
//设置缓冲区的大小，即可是带单位的具体数值，如0.1 Decimal Degrees；也可是输入图层中的某个字段，如“BufferLeng”
pBuffer.buffer_distance_or_field = "BufferLeng";
pBuffer.dissolve_option = "ALL"; //支持融合缓冲区重叠交叉部分
gp.Execute(pBuffer, null); //执行缓冲区分析
ArcToolBox中各个工具调用时需添加的引用分别如下图所示：
参考网页：http://edndoc.esri.com/arcobjects/9.2/NET/c4ff8b68-0410-435f-b8e5-682d5cea47cf.htm
2、参数设置
在调用ArcToolBox执行具体的分析操作时，需要设置各类输入输出参数，简单概括起来说主要分为两类：对应于Environment Settings对话框的Geoprocessor对象设置、对应于具体操作窗口的方法设置。以ArcToolBox->Analysis Tools->Overlay->Intersect为例，C#代码如下：
Geoprocessor gp = new Geoprocessor();
gp.OverwriteOutput = true; //覆盖原有文件并重写
//Environment Settings对话框参数设置，具体名称参考操作界面Help中对应参数文档
object obj = gp.GetEnvironmentValue("Extent"); //设置Exten，大小写无关；
gp.SetEnvironmentValue("Extent", "MAXOF"); //或者"113.697050 115.074770 29.969986 31.362495"
obj = gp.GetEnvironmentValue("OutputZFlag"); //设置Output has Z Values
gp.SetEnvironmentValue("OutputZFlag", "DEFAULT");
obj = gp.GetEnvironmentValue("OutputMFlag"); //设置Output has M Values
gp.SetEnvironmentValue("OutputMFlag", "DEFAULT");
obj = gp.GetEnvironmentValue("OutputCoordinateSystem"); //设置Output Coordinate System
gp.SetEnvironmentValue("OutputCoordinateSystem", Application.StartupPath + "\\zhouyang.prj");
obj = gp.GetEnvironmentValue("QualifiedFieldNames"); //设置Maintain fully qualifid field names
gp.SetEnvironmentValue("QualifiedFieldNames", "QUALIFIED");
//关于Environment Settings的设置可以参考ArcMap操作界面提供的文档，如图所示：
Environment Settings设置
参数名称参考帮助，如上图所示为Extent，其取值有三种形式
//具体操作窗口的方法设置
Intersect pIntersect = new Intersect();
//多个对象的输入：用分号隔开包含完整路径的文件名
pIntersect.in_features = pInputFeature1 + ";" + pInputFeature2;
//多个对象的输入：使用IGpValueTableObject接口，该接口可以设置Rank（http://resources.esri.com/help/9.3/arcgisengine/dotnet/84349562-e062-44ee-8db0-9fcdcd64708b.htm）
//object inputfeature1 = @"D:\周杨\贝贝\WuhanCity\ThiessenPolygons_Line_Buffer.shp";
//object inputfeature2 = @"D:\周杨\贝贝\wuhanCity_shp\poi Point.shp";
//IGpValueTableObject pObject = new GpValueTableObjectClass();
//pObject.SetColumns(2);
//pObject.AddRow(ref inputfeature1);
//pObject.AddRow(ref inputfeature2);
//pIntersect.in_features = pObject;
pIntersect.out_feature_class = pOutputFeature;
pIntersect.join_attributes = "All";
pIntersect.output_type = "POINT";
gp.Execute(pIntersect, null); //执行
//Intersect参数设置跟弹出的Intersect对话框对应，如图所示：
参考网页：http://edndoc.esri.com/arcobjects/9.2/NET/552ca115-f23b-4a74-a2c5-069c50d6cdcf.htm
3、运行结果对象提取
Geoprocessor对象通过Execute方法执行后将结果保存到指定输出路径下，通过也可以通过IGeoProcessorResult接口读取存储在内容中的结果对象，C#代码如下：
//执行图层求交运算
IGeoProcessorResult pResult = (IGeoProcessorResult)gp.Execute(pIntersect, null);
IGPUtilities pGPUtil = new GPUtilitiesClass();
IFeatureClass pFC;
IQueryFilter pQF;
pGPUtil.DecodeFeatureLayer(pResult.GetOutput(0),out pFC,out pQF);
int count = pFC.FeatureCount(null); //统计Feature对象个数
IFeatureCursor pCursor = pFC.Insert(true); //提取FeatureCursor对象
IFeatureLayer pFeatureLayer = new FeatureLayerClass();
pFeatureLayer.FeatureClass = pFC;
m_mapControl.Map.AddLayer(pFeatureLayer); //加载图层对象
参考网页：http://edndoc.esri.com/arcobjects/9.2/NET/1b14f488-84de-4e7f-8009-cfe612f8dcbe.htm
其实总的说来，ESRI的官方帮助和各类在线帮助文档中都提供了相应的说明，可以很容易搞清楚一些内容，但是在具体的操作过程中，有时候经常得不到结果，这时候就需要关注下Environment Settings中的部分参数是否设置了，有可能没有像软件操作界面中那样进行默认设置。
