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284 lines
12 KiB
284 lines
12 KiB
using NPOI.HSSF.UserModel;
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using NPOI.SS.UserModel;
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using NPOI.SS.Util;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.IO;
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using System.Text;
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namespace NFine.Code.Excel
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{
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public class NPOIExcel
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{
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private string _title;
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private string _sheetName;
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private string _filePath;
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/// <summary>
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/// 导出到Excel
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/// </summary>
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/// <param name="table"></param>
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/// <returns></returns>
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public bool ToExcel(DataTable table)
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{
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FileStream fs = new FileStream(this._filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
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IWorkbook workBook = new HSSFWorkbook();
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this._sheetName = this._sheetName.IsEmpty() ? "sheet1" : this._sheetName;
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ISheet sheet = workBook.CreateSheet(this._sheetName);
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//处理表格标题
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IRow row = sheet.CreateRow(0);
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row.CreateCell(0).SetCellValue(this._title);
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sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, table.Columns.Count - 1));
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row.Height = 500;
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ICellStyle cellStyle = workBook.CreateCellStyle();
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IFont font = workBook.CreateFont();
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font.FontName = "微软雅黑";
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font.FontHeightInPoints = 17;
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cellStyle.SetFont(font);
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cellStyle.VerticalAlignment = VerticalAlignment.Center;
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cellStyle.Alignment = HorizontalAlignment.Center;
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row.Cells[0].CellStyle = cellStyle;
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//处理表格列头
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row = sheet.CreateRow(1);
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for (int i = 0; i < table.Columns.Count; i++)
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{
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row.CreateCell(i).SetCellValue(table.Columns[i].ColumnName);
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row.Height = 350;
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sheet.AutoSizeColumn(i);
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}
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//处理数据内容
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for (int i = 0; i < table.Rows.Count; i++)
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{
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row = sheet.CreateRow(2 + i);
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row.Height = 250;
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for (int j = 0; j < table.Columns.Count; j++)
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{
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row.CreateCell(j).SetCellValue(table.Rows[i][j].ToString());
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sheet.SetColumnWidth(j, 256 * 15);
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}
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}
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//写入数据流
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workBook.Write(fs);
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fs.Flush();
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fs.Close();
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return true;
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}
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/// <summary>
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/// 导出到Excel
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/// </summary>
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/// <param name="table"></param>
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/// <param name="title"></param>
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/// <param name="sheetName"></param>
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/// <returns></returns>
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public bool ToExcel(DataTable table, string title, string sheetName, string filePath)
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{
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this._title = title;
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this._sheetName = sheetName;
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this._filePath = filePath;
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return ToExcel(table);
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}
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/// <summary>
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/// 组装workbook.
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/// </summary>
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/// <param name="dictionary">列头</param>
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/// <param name="dt">dataTable数据</param>
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/// <param name="columnHeader">表头</param>
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/// <returns></returns>
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public HSSFWorkbook BuildWorkbook(Dictionary<string, string> dictionary, DataTable dt, string columnHeader = "")
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{
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var workbook = new HSSFWorkbook();
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ISheet sheet = workbook.CreateSheet(string.IsNullOrWhiteSpace(dt.TableName) ? "Sheet1" : dt.TableName);
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var dateStyle = workbook.CreateCellStyle();
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var format = workbook.CreateDataFormat();
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dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");
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//取得列宽
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// var arrColWidth = new int[dt.Columns.Count];
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var arrColWidth = new int[dictionary.Count + 1];
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int itemCoutn = 0;//需要导出的列的数量.
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foreach (DataColumn item in dt.Columns)
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{
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//判断需要导出的 “列”
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if (dictionary.ContainsKey(item.ColumnName))
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{
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arrColWidth[itemCoutn] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
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itemCoutn++;
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}
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}
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itemCoutn = 0;
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for (var i = 0; i < dt.Rows.Count; i++)
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{
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for (var j = 0; j < dt.Columns.Count; j++)
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{
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//判断需要导出的 “列”
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if (dictionary.ContainsKey(dt.Rows[i][j].ToString()))
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{
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int intTemp = Encoding.GetEncoding(936).GetBytes(dt.Rows[i][j].ToString()).Length;
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if (intTemp > arrColWidth[j])
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{
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arrColWidth[j] = intTemp;
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}
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}
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}
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}
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int rowIndex = 0;//行索引，第一行为：表头（列头）
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foreach (DataRow row in dt.Rows)
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{
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#region 表头 列头
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if (rowIndex == 65535 || rowIndex == 0)
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{
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if (rowIndex != 0)
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{
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sheet = workbook.CreateSheet();
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}
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#region 表头及样式
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{
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IRow headerRow = sheet.CreateRow(0);
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headerRow.HeightInPoints = 19.5F;
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headerRow.Height = 40 * 20;
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headerRow.CreateCell(0).SetCellValue(columnHeader);
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//CellStyle
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ICellStyle headStyle = workbook.CreateCellStyle();
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headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;// 左右居中
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headStyle.VerticalAlignment = VerticalAlignment.Center;// 上下居中
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// 设置单元格的背景颜色（单元格的样式会覆盖列或行的样式）
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headStyle.FillForegroundColor = (short)11;
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//定义font
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IFont font = workbook.CreateFont();
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font.FontHeightInPoints = 20;
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font.Boldweight = 700;
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headStyle.SetFont(font);
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headerRow.GetCell(0).CellStyle = headStyle;
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//根据表的列数计算
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//sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 0, 0, dt.Columns.Count - 1));
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sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 0, 0, dictionary.Count));
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#endregion
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}
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{
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#region 列头及样式
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var headerRow = sheet.CreateRow(1);
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//CellStyle
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ICellStyle headStyle = workbook.CreateCellStyle();
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headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;// 左右居中
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headStyle.VerticalAlignment = VerticalAlignment.Center;// 上下居中
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//定义font
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IFont font = workbook.CreateFont();
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font.FontHeightInPoints = 10;
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font.Boldweight = 700;
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headStyle.SetFont(font);
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int columnCount = 0;
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foreach (var dic in dictionary)
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{
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foreach (DataColumn column in dt.Columns)
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{
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//判断需要导出的 “列”
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if (dic.Key.ToLower() == column.ColumnName.ToLower())
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{
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//headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
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//headerRow.GetCell(column.Ordinal).CellStyle = headStyle;
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//sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
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headerRow.CreateCell(columnCount).SetCellValue(dic.Value);//column.ColumnName
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headerRow.GetCell(columnCount).CellStyle = headStyle;
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sheet.SetColumnWidth(columnCount, (arrColWidth[columnCount]) * 256);
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columnCount++;
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continue;
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}
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}
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}
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#endregion
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}
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rowIndex = 2;
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}
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#endregion
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#region 内容
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var dataRow = sheet.CreateRow(rowIndex);
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int columnContentCount = 0; //column.Ordinal
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foreach (var dicKey in dictionary)
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{
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foreach (DataColumn column in dt.Columns)
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{
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//判断需要导出的 “列”
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if (dicKey.Key.ToLower() == column.ColumnName.ToLower())
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{
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var newCell = dataRow.CreateCell(columnContentCount);
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string drValue = row[column].ToString();
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switch (column.DataType.ToString())
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{
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case "System.String"://字符串类型
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newCell.SetCellValue(drValue);
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break;
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case "System.DateTime"://日期类型
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DateTime dateV;
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DateTime.TryParse(drValue, out dateV);
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newCell.SetCellValue(dateV);
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newCell.CellStyle = dateStyle;//格式化显示
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break;
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case "System.Boolean"://布尔型
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bool boolV = false;
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bool.TryParse(drValue, out boolV);
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newCell.SetCellValue(boolV);
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break;
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case "System.Int16"://整型
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case "System.Int32":
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case "System.Int64":
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case "System.Byte":
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int intV = 0;
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int.TryParse(drValue, out intV);
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newCell.SetCellValue(intV);
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break;
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case "System.Decimal"://浮点型
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case "System.Double":
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double doubV = 0;
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double.TryParse(drValue, out doubV);
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newCell.SetCellValue(doubV);
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break;
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case "System.DBNull"://空值处理
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newCell.SetCellValue("");
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break;
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default:
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newCell.SetCellValue("");
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break;
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}
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columnContentCount++;//列索引
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continue;
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}
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}
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}
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#endregion
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rowIndex++;
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}
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//自动列宽
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for (int i = 0; i <= dictionary.Count; i++)
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sheet.AutoSizeColumn(i, true);
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return workbook;
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}
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}
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}
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