arcgis Engine创建shp图层

原文：http://blog.sina.com.cn/s/blog_90b91bf10100ydvg.html

以创建点图层为例。

首先要得到保存文件的地址。

  SaveFileDialog saveFileDialog = new SaveFileDialog();

            saveFileDialog.Filter = "Shape文件（*.shp）|*.shp";

            saveFileDialog.Title = "新建点形shp文件";

            saveFileDialog.CheckFileExists = false;

            DialogResult dialogResult = saveFileDialog.ShowDialog();

            IWorkspaceFactory pWorkspaceFactory = new ShapefileWorkspaceFactory();

            int index;

            string fileName;

            string filePath;

            if (dialogResult == DialogResult.OK)

            {

                fileFullPath = saveFileDialog.FileName;

                index = fileFullPath.LastIndexOf("\");

                fileName = fileFullPath.Substring(index + 1);

                filePath = fileFullPath.Substring(0, index);

                if (System.IO.File.Exists(saveFileDialog.FileName))//检查文件是否存在

                {

                    if (MessageBox.Show("该文件夹下已经有同名文件，替换原文件？", "询问", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK)

                    {

                        IFeatureWorkspace FWS = pWorkspaceFactory.OpenFromFile(filePath, 0) as IFeatureWorkspace;

                        IFeatureClass pFeatureClass = FWS.OpenFeatureClass(fileName);

                        IDataset pDataset = pFeatureClass as IDataset;

                        pDataset.Delete();

                    }

                    //System.IO.File.Delete(saveFileDialog.FileName);

                    else

                        return;

                }

                

            }

            else

            {

                fileFullPath = null;

                return;

            }  

然后，要为该SHP建立新的字段：

            IFields pFields = new FieldsClass();

            IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;

            IField pField = new FieldClass();

            IFieldEdit pFieldEdit = pField as IFieldEdit;

            pFieldEdit.Name_2 = "Shape";

            pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;

            IGeometryDef pGeometryDef = new GeometryDef();

            IGeometryDefEdit pGeometryDefEdit = pGeometryDef as IGeometryDefEdit;

            pGeometryDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPoint;//点、线、面什么的

            pGeometryDefEdit.SpatialReference_2 = axMapControl1.SpatialReference;

          

            ISpatialReferenceFactory2 ipSpaRefFa = new SpatialReferenceEnvironmentClass();

            IGeographicCoordinateSystem ipGeoCorSys = new GeographicCoordinateSystemClass();

            ipGeoCorSys = ipSpaRefFa.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_WGS1984);

            ISpatialReference ipSpaRef = ipGeoCorSys;

            //IControlPrecision2 contrPrecision = ipSpaRef as IControlPrecision2;

           

            pGeometryDefEdit.SpatialReference_2 = ipSpaRef;

            

            pFieldEdit.GeometryDef_2 = pGeometryDef;

            pFieldsEdit.AddField(pField);

            pField = new FieldClass();//新建字段

            pFieldEdit = pField as IFieldEdit;

            pFieldEdit.Length_2 = 100;

            pFieldEdit.Name_2 = "editorName";

            pFieldEdit.AliasName_2 = "editorName";

            pFieldEdit.Type_2 = esriFieldType.esriFieldTypeString;

            

            pFieldsEdit.AddField(pField);

            //继续增加其它字段

        最后创建图层    

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

           

           int i = fileName.IndexOf(".shp");

            if(i == -1 )

            pFeatureWorkspace.CreateFeatureClass(fileName + ".shp", pFields, null, null, esriFeatureType.esriFTSimple, "Shape", "");

            else

            pFeatureWorkspace.CreateFeatureClass(fileName, pFields, null, null, esriFeatureType.esriFTSimple, "Shape", "");

           

            axMapControl1.AddShapeFile(filePath, fileName + ".shp");