删除要素

单个要素的删除

private bool DeleteFeature(IFeature pFeature)

        {

            try

            {

                var pFeatureClass = pFeature.Class as IFeatureClass;

 

                var pDataset = pFeatureClass as IDataset;

                IWorkspace pWorkspace = pDataset.Workspace;

                var pWorkspaceEdit = pWorkspace as IWorkspaceEdit;

 

                pWorkspaceEdit.StartEditing(false);

                pWorkspaceEdit.StartEditOperation();

                pFeature.Delete();

                pWorkspaceEdit.StopEditOperation();

                pWorkspaceEdit.StopEditing(true);

                return true;

            }

            catch (Exception ex)

            {

                return false;

            }

        }

　　

批量要素的删除

SQL语句删除大大提高了执行效率。

private void DeleteData()

        {

            for (int j = 0; j < arrLayerNameTemp.Length; j++)

            {

                string strLyrNm = arrLayerNameTemp[j].ToString();

                IFeatureClass pFeatureClass = clsDevelopeHelper.GetFeatureClassByName(workspace, strLyrNm);

                if (pFeatureClass != null)

                {

                    IQueryFilter QueryFilter = new QueryFilterClass();

                    if (pFeatureClass.FeatureCount(QueryFilter) > 0)

                    {

                        //判断是否支持

                        //(1)判断是否支持SQL语句

                        IWorkspaceProperties pWspProperties = workspace asIWorkspaceProperties;

                        IWorkspaceProperty pWspProperty = pWspProperties.get_Property(esriWorkspacePropertyGroupType.esriWorkspacePropertyGroup,

                            (int)esriWorkspacePropertyType.esriWorkspacePropCanExecuteSQL);

                        if (!pWspProperty.IsSupported) return;

                        //删除数据

                        IDataset pDataset = pFeatureClass as IDataset;

                        pDataset.Workspace.ExecuteSQL("delete from " + pDataset.Name);

                    }

                }

            }

        }

　　文章出处：http://blog.163.com/liuyang1285@126/blog/#m=0