[转] arcgis Engine创建shp图层

小生 原文 arcgis Engine创建shp图层

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");