[C#] [ArcGIS] [Engine] NPOI 實現將屬性表導出爲Excel文檔（提供插件鏈接）

目錄

1.Intro

2.Details

3.Environment

4.Source

(1) 將要素類存儲爲DataTable

(2) 生成Excel文檔

5.Conclusion

---

1.Intro

偶爾翻到了去年上半年寫的項目，覺得這個方法不錯，拿出來共享一下。爲了便於屬性提取，寫了個導出成Excel的函數，用到了NPOI控件的方法，具體實現很簡單，先獲取要導出屬性表的要素類，然後將要素類的屬性錶轉換爲DataTable，再導出就方便很多了。

2.Details

首先將要素類的屬性錶轉化爲DataTable類型的數據存儲，這裏使用了DevExpress的GridControl控件進行數據源關聯，

// dataTable爲要素類屬性錶轉化的DataTable類型的對象
this.gridControl.DataSource = dataTable;

然後就可以顯示屬性表，比微軟自帶的DataGridView方便很多，功能也強大很多，同時可以在屬性表中自定義右鍵事件，能夠刪除列和行（不會對原始的屬性數據造成修改），從而便捷的定義要導出的數據。注意，在綁定數據源之後，由於GridControl的數據源是和DataTable對象雙向關聯的，所以對任何一個造成修改，都會影響另一個。

導出效果。

3.Environment

Environment：Windows 7及以上

Language：C#

IDE：Visual Studio 2012

SDK：ArcGIS Engine 10.2

4.Source

(1) 將要素類存儲爲DataTable

        /// <summary>
        /// 獲取要素屬性表
        /// </summary>
        /// <param name="pFeatureClass">要素類對象</param>
        /// <returns>返回DataTable對象</returns>
        public static DataTable Get_AttributesTable(IFeatureClass pFeatureClass)
        {
            string geometryType = string.Empty;
            if (pFeatureClass.ShapeType == esriGeometryType.esriGeometryPoint)
            {
                geometryType = "點";
            }
            if (pFeatureClass.ShapeType == esriGeometryType.esriGeometryMultipoint)
            {
                geometryType = "點集";
            }
            if (pFeatureClass.ShapeType == esriGeometryType.esriGeometryPolyline)
            {
                geometryType = "折線";
            }
            if (pFeatureClass.ShapeType == esriGeometryType.esriGeometryPolygon)
            {
                geometryType = "面";
            }

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

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

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

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

            // 寫入字段值
            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();
            }

            // 釋放遊標
            System.Runtime.InteropServices.Marshal.ReleaseComObject(pFeatureCursor);
            return dataTable;
        }

 

(2) 生成Excel文檔

        /// <summary>
        /// 生成Excel文件
        /// </summary>
        /// <param name="dataTable">數據表對象</param>
        /// <param name="filePath">輸出路徑</param>
        private void CreateExcelFile(DataTable dataTable, string filePath)
        {
            NPOI.SS.UserModel.IWorkbook workbook = null;
            if (System.IO.Path.GetExtension(filePath) == ".xls")
            {
                workbook = new NPOI.HSSF.UserModel.HSSFWorkbook();
            }
            else
            {
                workbook = new NPOI.XSSF.UserModel.XSSFWorkbook();
            }

            // 創建行
            NPOI.SS.UserModel.ISheet sheet = workbook.CreateSheet("屬性表");
            NPOI.SS.UserModel.IRow row = sheet.CreateRow(0);
            NPOI.SS.UserModel.ICell cell = null;

            // 寫入列名
            int columnCount = dataTable.Columns.Count;

            for (int i = 0; i < columnCount; i++)
            {
                cell = row.CreateCell(i);
                cell.SetCellValue(dataTable.Columns[i].ColumnName);
            }

            // 寫入列值
            int rowCount = dataTable.Rows.Count;

            for (int i = 0; i < rowCount; i++)
            {
                row = sheet.CreateRow(i + 1);
                for (int j = 0; j < columnCount; j++)
                {
                    cell = row.CreateCell(j);
                    cell.SetCellValue(dataTable.Rows[i][j].ToString());
                }
            }

            // 寫入文件
            System.IO.FileStream fileStream = new System.IO.FileStream(filePath, System.IO.FileMode.Create);
            workbook.Write(fileStream);
            fileStream.Close();
        }

5.Conclusion

NPOI 2.0.1.0 破解版

百度網盤鏈接：https://pan.baidu.com/s/104FAoGPGjoYSFFXm57fzwg

提取碼：7hry