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using NPOI.HSSF.UserModel;
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using NPOI.SS.UserModel;
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using NPOI.HSSF.Util;
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namespace Common.Tools
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{
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/// <summary>
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/// Description：Npoi之Excel数据导出帮助类（创建Excel表格行列，设置行高，设置字体样式，单元格边框样式，单元格背景颜色和样式，单元格内容对齐方式等常用属性和样式封装）
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/// </summary>
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public class NpoiExcelExportHelper
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{
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private static NpoiExcelExportHelper _exportHelper;
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public static NpoiExcelExportHelper _
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{
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get => _exportHelper ?? (_exportHelper = new NpoiExcelExportHelper());
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set => _exportHelper = value;
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}
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/// <summary>
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/// TODO:先创建行，然后在创建对应的列
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/// 创建Excel中指定的行
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/// </summary>
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/// <param name="sheet">Excel工作表对象</param>
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/// <param name="rowNum">创建第几行(从0开始)</param>
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/// <param name="rowHeight">行高</param>
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public HSSFRow CreateRow(ISheet sheet, int rowNum, float rowHeight)
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{
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HSSFRow row = (HSSFRow)sheet.CreateRow(rowNum); //创建行
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row.HeightInPoints = rowHeight; //设置列头行高
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return row;
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}
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/// <summary>
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/// 创建行内指定的单元格
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/// </summary>
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/// <param name="row">需要创建单元格的行</param>
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/// <param name="cellStyle">单元格样式</param>
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/// <param name="cellNum">创建第几个单元格(从0开始)</param>
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/// <param name="cellValue">给单元格赋值</param>
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/// <returns></returns>
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public HSSFCell CreateCells(HSSFRow row, HSSFCellStyle cellStyle, int cellNum, string cellValue)
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{
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HSSFCell cell = (HSSFCell)row.CreateCell(cellNum); //创建单元格
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cell.CellStyle = cellStyle; //将样式绑定到单元格
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if (!string.IsNullOrWhiteSpace(cellValue))
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{
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//单元格赋值
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cell.SetCellValue(cellValue);
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}
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return cell;
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}
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/// <summary>
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/// 行内单元格常用样式设置
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/// </summary>
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/// <param name="workbook">Excel文件对象</param>
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/// <param name="hAlignment">水平布局方式</param>
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/// <param name="vAlignment">垂直布局方式</param>
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/// <param name="fontHeightInPoints">字体大小</param>
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/// <param name="isAddBorder">是否需要边框</param>
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/// <param name="boldWeight">字体加粗 (None = 0,Normal = 400，Bold = 700</param>
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/// <param name="fontName">字体（仿宋，楷体，宋体，微软雅黑...与Excel主题字体相对应）</param>
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/// <param name="isAddBorderColor">是否增加边框颜色</param>
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/// <param name="isItalic">是否将文字变为斜体</param>
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/// <param name="isLineFeed">是否自动换行</param>
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/// <param name="isAddCellBackground">是否增加单元格背景颜色</param>
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/// <param name="fillPattern">填充图案样式(FineDots 细点，SolidForeground立体前景，isAddFillPattern=true时存在)</param>
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/// <param name="cellBackgroundColor">单元格背景颜色（当isAddCellBackground=true时存在）</param>
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/// <param name="fontColor">字体颜色</param>
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/// <param name="underlineStyle">下划线样式（无下划线[None],单下划线[Single],双下划线[Double],会计用单下划线[SingleAccounting],会计用双下划线[DoubleAccounting]）</param>
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/// <param name="typeOffset">字体上标下标(普通默认值[None],上标[Sub],下标[Super]),即字体在单元格内的上下偏移量</param>
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/// <param name="isStrikeout">是否显示删除线</param>
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/// <returns></returns>
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public HSSFCellStyle CreateStyle(HSSFWorkbook workbook, HorizontalAlignment hAlignment, VerticalAlignment vAlignment, short fontHeightInPoints, bool isAddBorder, short boldWeight, string fontName = "宋体", bool isAddBorderColor = true, bool isItalic = false, bool isLineFeed = false, bool isAddCellBackground = false, FillPattern fillPattern = FillPattern.NoFill, short cellBackgroundColor = HSSFColor.Yellow.Index, short fontColor = HSSFColor.Black.Index, FontUnderlineType underlineStyle =
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FontUnderlineType.None, FontSuperScript typeOffset = FontSuperScript.None, bool isStrikeout = false)
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{
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HSSFCellStyle cellStyle = (HSSFCellStyle)workbook.CreateCellStyle(); //创建列头单元格实例样式
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cellStyle.Alignment = hAlignment; //水平居中
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cellStyle.VerticalAlignment = vAlignment; //垂直居中
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cellStyle.WrapText = isLineFeed;//自动换行
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//背景颜色，边框颜色，字体颜色都是使用 HSSFColor属性中的对应调色板索引，关于 HSSFColor 颜色索引对照表，详情参考：https://www.cnblogs.com/Brainpan/p/5804167.html
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//TODO：引用了NPOI后可通过ICellStyle 接口的 FillForegroundColor 属性实现 Excel 单元格的背景色设置，FillPattern 为单元格背景色的填充样式
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//TODO:十分注意，要设置单元格背景色必须是FillForegroundColor和FillPattern两个属性同时设置，否则是不会显示背景颜色
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if (isAddCellBackground)
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{
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cellStyle.FillForegroundColor = cellBackgroundColor;//单元格背景颜色
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cellStyle.FillPattern = fillPattern;//填充图案样式(FineDots 细点，SolidForeground立体前景)
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}
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//是否增加边框
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if (isAddBorder)
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{
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//常用的边框样式 None(没有),Thin(细边框，瘦的),Medium(中等),Dashed(虚线),Dotted(星罗棋布的),Thick(厚的),Double(双倍),Hair(头发)[上右下左顺序设置]
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cellStyle.BorderBottom = BorderStyle.Thin;
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cellStyle.BorderRight = BorderStyle.Thin;
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cellStyle.BorderTop = BorderStyle.Thin;
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cellStyle.BorderLeft = BorderStyle.Thin;
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}
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//是否设置边框颜色
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if (isAddBorderColor)
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{
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//边框颜色[上右下左顺序设置]
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cellStyle.TopBorderColor = HSSFColor.DarkGreen.Index;//DarkGreen(黑绿色)
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cellStyle.RightBorderColor = HSSFColor.DarkGreen.Index;
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cellStyle.BottomBorderColor = HSSFColor.DarkGreen.Index;
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cellStyle.LeftBorderColor = HSSFColor.DarkGreen.Index;
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}
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/**
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* 设置相关字体样式
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*/
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var cellStyleFont = (HSSFFont)workbook.CreateFont(); //创建字体
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//假如字体大小只需要是粗体的话直接使用下面该属性即可
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//cellStyleFont.IsBold = true;
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cellStyleFont.Boldweight = boldWeight; //字体加粗
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cellStyleFont.FontHeightInPoints = fontHeightInPoints; //字体大小
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cellStyleFont.FontName = fontName;//字体（仿宋，楷体，宋体 ）
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cellStyleFont.Color = fontColor;//设置字体颜色
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cellStyleFont.IsItalic = isItalic;//是否将文字变为斜体
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cellStyleFont.Underline = underlineStyle;//字体下划线
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cellStyleFont.TypeOffset = typeOffset;//字体上标下标
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cellStyleFont.IsStrikeout = isStrikeout;//是否有删除线
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cellStyle.SetFont(cellStyleFont); //将字体绑定到样式
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return cellStyle;
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}
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}
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}
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