ArcEngine实现要素属性表分页查询

用过ArcGIS的同志应该都知道它的属性表分页功能，如下图所示：

这次我也照葫芦画瓢，自己做了一个ArcEngine + DevExpress的分页Demo，分页主要使用IQueryFilterDefinition3接口的SetPaginationClause方法，需要注意的是：该接口只对于GDB要素有效，对shp文件则无效。界面效果如下图所示：

MainForm.cs代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using DevExpress.XtraEditors.Repository;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.DataSourcesFile;
using ESRI.ArcGIS.DataSourcesGDB;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Output;
using ESRI.ArcGIS.SystemUI;

namespace DXApplication1
{
    public partial class MainForm : DevExpress.XtraEditors.XtraForm
    {
        // 要素类
        private IFeatureClass featureClass = null;

        // 要素数量
        private int featureCount = 0;

        // 当前页索引
        private int pageIndex = 0;

        // 每页记录条数
        private int pageSize = 0;

        // 页数总和
        private int pageTotal = 0;

        // 构造函数
        public MainForm()
        {
            InitializeComponent();
            Init();
        }

        // 初始化
        private void Init()
        {
            // 获取要素类
            this.featureClass = Common.GetFeatureClass();
            this.featureCount = featureClass.FeatureCount(null);

            // 每页记录条数
            RepositoryItemComboBox item = cmbPageSize.Edit as RepositoryItemComboBox;
            item.Items.Add(50);
            item.Items.Add(100);
            item.Items.Add(200);
            item.Items.Add(500);
            this.cmbPageSize.EditValue = item.Items[0];

            // 计算分页参数
            this.pageIndex = 1;
            this.pageSize = int.Parse(this.cmbPageSize.EditValue.ToString());
            this.pageTotal = featureCount % pageSize == 0 ? featureCount / pageSize : featureCount / pageSize + 1;

            // 设置标签文本
            this.txtCurrentPageIndex.EditValue = pageIndex.ToString();
            this.lblPageTotal.Caption = "页，共" + pageTotal.ToString() + "页";
            this.lblRowsCount.Caption = "共有" + featureCount.ToString() + "条记录";
            this.GetPaginationTable(pageIndex, pageSize);
        }

        // 切换每页记录条数
        private void cmbPageSize_EditValueChanged(object sender, EventArgs e)
        {
            this.pageIndex = 1;
            this.pageSize = int.Parse(this.cmbPageSize.EditValue.ToString());
            this.pageTotal = featureCount % pageSize == 0 ? featureCount / pageSize : featureCount / pageSize + 1;
            this.txtCurrentPageIndex.EditValue = pageIndex.ToString();
            this.lblPageTotal.Caption = "页，共" + pageTotal.ToString() + "页";
            this.GetPaginationTable(pageIndex, pageSize);
        }

        // 第一页
        private void btnFirstPage_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            if (pageIndex != 1)
            {
                this.pageIndex = 1;
                this.txtCurrentPageIndex.EditValue = pageIndex.ToString();
                this.GetPaginationTable(pageIndex, pageSize);
            }
        }

        // 前一页
        private void btnPreviousPage_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            if (pageIndex != 1)
            {
                this.pageIndex -= 1;
                this.txtCurrentPageIndex.EditValue = pageIndex.ToString();
                this.GetPaginationTable(pageIndex, pageSize);
            }
        }

        // 后一页
        private void btnNextPage_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            if (pageIndex != pageTotal)
            {
                this.pageIndex += 1;
                this.txtCurrentPageIndex.EditValue = pageIndex.ToString();
                this.GetPaginationTable(pageIndex, pageSize);
            }
        }

        // 最后一页
        private void btnLastPage_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            if (pageIndex != pageTotal)
            {
                this.pageIndex = pageTotal;
                this.txtCurrentPageIndex.EditValue = pageIndex.ToString();
                this.GetPaginationTable(pageIndex, pageSize);
            }
        }

        // 跳转
        private void btnGo_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            int go;
            if (!int.TryParse(txtTargetPageIndex.EditValue.ToString(), out go))
            {
                XtraMessageBox.Show("请输入正确的页数！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }
            if (go < 1 || go > pageTotal)
            {
                XtraMessageBox.Show("输入的页数必须小于总页数！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }
            this.pageIndex = go;
            this.txtCurrentPageIndex.EditValue = pageIndex.ToString();
            this.GetPaginationTable(pageIndex, pageSize);
        }

        // 获取分页数据
        private void GetPaginationTable(int offset, int rowsCount)
        {
            IQueryFilter pQueryFilter = new QueryFilter();
            IQueryFilterDefinition3 pQueryFilterDefinition3 = pQueryFilter as IQueryFilterDefinition3;
            pQueryFilterDefinition3.SetPaginationClause((offset - 1) * rowsCount, rowsCount);
            dgvAttributesTable.DataSource = Common.GetAttributesTable(featureClass, pQueryFilter);
        }
    }
}

Common.cs代码：

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.DataSourcesFile;
using ESRI.ArcGIS.DataSourcesGDB;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Output;
using ESRI.ArcGIS.SystemUI;


namespace DXApplication1
{
    public class Common
    {
        // 获取要素类
        public static IFeatureClass GetFeatureClass()
        {
            IWorkspaceFactory pWorkspaceFactory = new FileGDBWorkspaceFactory();
            IWorkspace pWorkspace = pWorkspaceFactory.OpenFromFile(@"C:\Users\DSF\Desktop\test.gdb", 0);
            IFeatureWorkspace pFeatureWorkspace = pWorkspace as IFeatureWorkspace;
            IFeatureClass pFeatureClass = pFeatureWorkspace.OpenFeatureClass("data");
            return pFeatureClass;
        }

        // 获取要素属性表
        public static DataTable GetAttributesTable(IFeatureClass pFeatureClass, IQueryFilter pQueryFilter)
        {
            string geometryType = string.Empty;
            if (pFeatureClass.ShapeType == esriGeometryType.esriGeometryPoint)
            {
                geometryType = "点";
            }
            if (pFeatureClass.ShapeType == esriGeometryType.esriGeometryMultipoint)
            {
                geometryType = "点集";
            }
            if (pFeatureClass.ShapeType == esriGeometryType.esriGeometryPolyline)
            {
                geometryType = "折线";
            }
            if (pFeatureClass.ShapeType == esriGeometryType.esriGeometryPolygon)
            {
                geometryType = "面";
            }

            // 字段集合
            IFields pFields = pFeatureClass.Fields;
            int fieldsCount = pFields.FieldCount;

            // 写入字段名
            DataTable dataTable = new DataTable();
            for (int i = 0; i < fieldsCount; i++)
            {
                dataTable.Columns.Add(pFields.get_Field(i).Name);
            }

            // 要素游标
            IFeatureCursor pFeatureCursor = pFeatureClass.Search(pQueryFilter, true);
            IFeature pFeature = pFeatureCursor.NextFeature();
            if (pFeature == null)
            {
                return dataTable;
            }

            // 获取MZ值
            IMAware pMAware = pFeature.Shape as IMAware;
            IZAware pZAware = pFeature.Shape as IZAware;
            if (pMAware.MAware)
            {
                geometryType += " M";
            }
            if (pZAware.ZAware)
            {
                geometryType += "Z";
            }

            // 写入字段值
            while (pFeature != null)
            {
                DataRow dataRow = dataTable.NewRow();
                for (int i = 0; i < fieldsCount; i++)
                {
                    if (pFields.get_Field(i).Type == esriFieldType.esriFieldTypeGeometry)
                    {
                        dataRow[i] = geometryType;
                    }
                    else
                    {
                        dataRow[i] = pFeature.get_Value(i).ToString();
                    }
                }
                dataTable.Rows.Add(dataRow);
                pFeature = pFeatureCursor.NextFeature();
            }

            // 释放游标
            System.Runtime.InteropServices.Marshal.ReleaseComObject(pFeatureCursor);
            return dataTable;
        }
    }
}