C#+ArcGIS Engine 中创建Shp点图层

 if (lblFilePath.Text.Trim() == "")//         '检查保存路径不为空
                {
                    MessageBox.Show("请选择保存路径");
                    return;
                }
                if (TxtSaveName.Text.Trim() == "")//         '检查文件名不为空
                {
                    MessageBox.Show("请选择保存图层名");
                    return;
                }

                //指定目录，如果存在则删除
                //ISpatialReference pSpatialReference = _frmMain.pCurrentMap.ActiveView.FocusMap.SpatialReference;
              

                string strShapeFolder = lblFilePath.Text;
                string strShapeFile = TxtSaveName.Text.Trim() + ".shp";

                FileInfo fFile = new FileInfo(strShapeFolder + @"\" + TxtSaveName.Text.Trim() + ".shp");
                //是否重命名
                if (fFile.Exists)
                {
                   
                    DialogResult r2 = MessageBox.Show("此文件名已经存在，要覆盖吗？", "返回值 是6 否7", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                    if (r2 == System.Windows.Forms.DialogResult.Yes)    //取消关闭
                    {
                        DirectoryInfo fold = new DirectoryInfo(strShapeFolder);
                        FileInfo[] files = fold.GetFiles(TxtSaveName.Text.Trim() + ".*");
                        foreach (FileInfo f in files)
                        {
                            f.Delete();
                        }
                    }
                    else
                    {
                        TxtSaveName.Focus();
                        return;
                    }
                }

                string shapeFileFullName = strShapeFolder + strShapeFile;
                IWorkspaceFactory pWorkspaceFactory = new ShapefileWorkspaceFactory();
                IFeatureWorkspace pFeatureWorkspace = (IFeatureWorkspace)pWorkspaceFactory.OpenFromFile(strShapeFolder, 0);
                IFeatureClass pFeatureClass;
                if (File.Exists(shapeFileFullName))
                {
                    pFeatureClass = pFeatureWorkspace.OpenFeatureClass(strShapeFile);
                    IDataset pDataset = (IDataset)pFeatureClass;
                    pDataset.Delete();
                }

                //设置字段
                int i;
                double tmpLongitude;
                double tmplatitude;
                IPoint pPoint;

                IFields pFields = new FieldsClass();
                IFieldsEdit pFieldsEdit = (IFieldsEdit)pFields;

                IField pField = new FieldClass();
                IFieldEdit pFieldEdit = (IFieldEdit)pField;

                ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironment();
                IGeographicCoordinateSystem pGCS;
                pGCS = spatialReferenceFactory.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_WGS1984);

                pFieldEdit.Name_2 = "SHAPE";
                pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;

                IGeometryDefEdit pGeoDef = new GeometryDefClass();
                IGeometryDefEdit pGeoDefEdit = (IGeometryDefEdit)pGeoDef;
                pGeoDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPoint;
                pGeoDefEdit.SpatialReference_2 = pGCS; //new UnknownCoordinateSystemClass();
                pFieldEdit.GeometryDef_2 = pGeoDef;
                pFieldsEdit.AddField(pField);

                pField = new FieldClass();
                pFieldEdit = (IFieldEdit)pField;
                pFieldEdit.Name_2 = "经度";
                pFieldEdit.Type_2 = esriFieldType.esriFieldTypeDouble;
                pFieldsEdit.AddField(pField);

                pField = new FieldClass();
                pFieldEdit = (IFieldEdit)pField;
                pFieldEdit.Name_2 = "纬度";
                pFieldEdit.Type_2 = esriFieldType.esriFieldTypeDouble;
                pFieldsEdit.AddField(pField);

                pField = new FieldClass();
                pFieldEdit = (IFieldEdit)pField;
                pFieldEdit.Name_2 = "地点";
                pFieldEdit.Type_2 = esriFieldType.esriFieldTypeString;
                pFieldEdit.Length_2 = 30;
                pFieldsEdit.AddField(pField);

                pField = new FieldClass();
                pFieldEdit = (IFieldEdit)pField;
                pFieldEdit.Name_2 = "炮型";
                pFieldEdit.Type_2 = esriFieldType.esriFieldTypeString;
                pFieldEdit.Length_2 = 30;
                pFieldsEdit.AddField(pField);

                pField = new FieldClass();
                pFieldEdit = (IFieldEdit)pField;
                pFieldEdit.Name_2 = "高程";
                pFieldEdit.Type_2 = esriFieldType.esriFieldTypeDouble;
                pFieldsEdit.AddField(pField);

                //创建shp
                pFeatureClass = pFeatureWorkspace.CreateFeatureClass(strShapeFile, pFields, null, null, esriFeatureType.esriFTSimple, "SHAPE", "");

                //进度条
                dlgReadProgress newprogress = new dlgReadProgress();
                {
                    newprogress.Label1.Text = "正在生成shp文件，请稍候。。。";
                    newprogress.ProgressBar.Maximum = gvwPoint.SelectedRows.Count;
                    newprogress.ProgressBar.Step = 1;
                }
              
                for (i = 0; i < gvwPoint.SelectedRows.Count; i++)
                {
                    tmpLongitude = Convert.ToDouble(gvwPoint.SelectedRows[i].Cells[3].Value.ToString().Trim());
                    tmpLongitude += Convert.ToDouble(gvwPoint.SelectedRows[i].Cells[4].Value.ToString().Trim()) / 60.0;
                    tmpLongitude += Convert.ToDouble(gvwPoint.SelectedRows[i].Cells[5].Value.ToString().Trim()) / 3600.0;

                    tmplatitude = Convert.ToDouble(gvwPoint.SelectedRows[i].Cells[6].Value.ToString().Trim());
                    tmplatitude += Convert.ToDouble(gvwPoint.SelectedRows[i].Cells[7].Value.ToString().Trim()) / 60.0;
                    tmplatitude += Convert.ToDouble(gvwPoint.SelectedRows[i].Cells[8].Value.ToString().Trim()) / 3600.0;

                    pPoint = new PointClass();
                    pPoint.X = tmpLongitude;
                    pPoint.Y = tmplatitude;
                    IFeature pFeature = pFeatureClass.CreateFeature();
                    pFeature.Shape = pPoint;
                    pFeature.set_Value(pFeature.Fields.FindField("经度"), tmpLongitude.ToString("F4"));
                    pFeature.set_Value(pFeature.Fields.FindField("纬度"), tmplatitude.ToString("F4"));
                    pFeature.set_Value(pFeature.Fields.FindField("地点"), gvwPoint.SelectedRows[i].Cells[2].Value);
                    pFeature.set_Value(pFeature.Fields.FindField("炮型"), gvwPoint.SelectedRows[i].Cells[11].Value);
                    pFeature.set_Value(pFeature.Fields.FindField("高程"), gvwPoint.SelectedRows[i].Cells[9].Value);
                    pFeature.Store();

                    newprogress.ProgressBar.PerformStep();
                    newprogress.Show();
                    newprogress.Refresh();
                }
                newprogress.Close();

                DialogResult r1 = MessageBox.Show("是否加载当前图层？", "返回值 是6 否7", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                if (r1 == DialogResult.Yes)
                {
                    IFeatureLayer pFeaturelayer = new FeatureLayerClass();
                    pFeaturelayer.FeatureClass = pFeatureClass;
                    pFeaturelayer.Name = "layer";

                    _frmMain.pCurrentMap.AddLayer(pFeaturelayer);
                }