最近有網友諮詢如何設置單元格樣式,在以前的版本中是不支持的,以前主要考慮的是數據,對於導出的樣式並無支持,這個 issue 也讓我以爲目前還不是足夠的靈活,因而進行了一些探索,增長了更多擴展的可能性,一塊兒來看一下吧html
由於導入導出是針對某一個 Sheet 而言的,因此支持爲不一樣的 Sheet 設置不一樣的配置,若是全部 Sheet 的配置都是同樣的,則只配置默認的 Sheet 配置就能夠了,新版本中增長了三個委託,進一步的加強的導出的靈活性git
/// <summary> /// Cell Action on export /// </summary> public Action<ICell>? CellAction { get; set; } /// <summary> /// Row Action on export /// </summary> public Action<IRow>? RowAction { get; set; } /// <summary> /// Sheet Action on export /// </summary> public Action<ISheet>? SheetAction { get; set; }
能夠不一樣的 Level 擴展本身想要的功能,這些擴展會在寫入數據以後執行,能夠藉此來設置特殊單元格的樣式,若是你想也能夠從新設置導出的數據,來看下面的示例:github
首先來看一個設置 Header 字體樣式的一個示例,完整代碼參考:https://github.com/WeihanLi/WeihanLi.Npoi/blob/310d7637e82210f7558b2a60a637b43485c0e562/samples/DotNetCoreSample/Program.cs#L157c#
var setting = FluentSettings.For<TestEntity>(); // ExcelSetting setting.HasAuthor("WeihanLi") .HasTitle("WeihanLi.Npoi test") .HasDescription("WeihanLi.Npoi test") .HasSubject("WeihanLi.Npoi test"); setting.HasSheetSetting(config => { config.StartRowIndex = 1; config.SheetName = "SystemSettingsList"; config.AutoColumnWidthEnabled = true; config.RowAction = row => { if (row.RowNum == 0) { var style = row.Sheet.Workbook.CreateCellStyle(); style.Alignment = HorizontalAlignment.Center; var font = row.Sheet.Workbook.CreateFont(); font.FontName = "JetBrains Mono"; font.IsBold = true; font.FontHeight = 200; style.SetFont(font); row.Cells.ForEach(c => c.CellStyle = style); } }; }); setting.Property(_ => _.SettingId) .HasColumnIndex(0); setting.Property(_ => _.SettingName) .HasColumnTitle("SettingName") .HasColumnIndex(1); setting.Property(_ => _.DisplayName) .HasOutputFormatter((entity, displayName) => $"AAA_{entity?.SettingName}_{displayName}") .HasInputFormatter((entity, originVal) => originVal?.Split(new[] { '_' })[2]) .HasColumnTitle("DisplayName") .HasColumnIndex(2); setting.Property(_ => _.SettingValue) .HasColumnTitle("SettingValue") .HasColumnIndex(3); setting.Property(_ => _.CreatedTime) .HasColumnTitle("CreatedTime") .HasColumnIndex(4) .HasColumnWidth(10) .HasColumnFormatter("yyyy-MM-dd HH:mm:ss"); setting.Property(_ => _.CreatedBy) .HasColumnInputFormatter(x => x += "_test") .HasColumnIndex(4) .HasColumnTitle("CreatedBy"); setting.Property(x => x.Enabled) .HasColumnInputFormatter(val => "Enabled".EqualsIgnoreCase(val)) .HasColumnOutputFormatter(v => v ? "Enabled" : "Disabled"); setting.Property("HiddenProp") .HasOutputFormatter((entity, val) => $"HiddenProp_{entity?.PKID}"); setting.Property(_ => _.PKID).Ignored(); setting.Property(_ => _.UpdatedBy).Ignored(); setting.Property(_ => _.UpdatedTime).Ignored(); }
導出代碼:app
var entities = new List<TestEntity>() { new TestEntity() { PKID = 1, SettingId = Guid.NewGuid(), SettingName = "Setting1", SettingValue = "Value1", DisplayName = "dd\"d,1" }, new TestEntity() { PKID=2, SettingId = Guid.NewGuid(), SettingName = "Setting2", SettingValue = "Value2", Enabled = true, CreatedBy = "li\"_" }, }; entities.ToExcelFile("test.xlsx");
導出結果以下:單元測試
能夠看得出來,咱們導出的結果中第一行的樣式和別的樣式會不一樣測試
除了直接導出到 excel 文件以外,還能夠支持導出到某一個 sheet 中,我在個人另一個 DbTool 的項目中也在使用,將原來的一大坨代碼作了很大的簡化,詳細修改能夠參考這個 commit: https://github.com/WeihanLi/DbTool/commit/7c7b980714af11e5fec3f8b3babac0904f94cff3#diff-d0ef24afd15ae6aa4ead43fbe31a895c1c051ab9c6e50f4ff4c7544a9592f958R8字體
最後實際使用的導出代碼:ui
var workbook = ExcelHelper.PrepareWorkbook(FileExtension.EndsWith(".xls") ? ExcelFormat.Xls : ExcelFormat.Xlsx); foreach (var tableEntity in tableInfo) { //Create Sheet var sheet = workbook.CreateSheet(tableEntity.TableName); //create title var titleRow = sheet.CreateRow(0); var titleCell = titleRow.CreateCell(0); titleCell.SetCellValue(tableEntity.TableDescription); // export list data to excel sheet.ImportData(tableEntity.Columns); } return workbook.ToExcelBytes();
相比以前的代碼,大大簡化了,原來的代碼能夠參考https://github.com/WeihanLi/DbTool/commit/7c7b980714af11e5fec3f8b3babac0904f94cff3#diff-d0ef24afd15ae6aa4ead43fbe31a895c1c051ab9c6e50f4ff4c7544a9592f958L17-L121, 100 多行代碼,太長了不方便截圖excel
大部分的代碼都變成了配置,部分配置代碼能夠參考下面的代碼,具體配置能夠參考:https://github.com/WeihanLi/DbTool/blob/wpf-dev/src/DbTool/ExcelDbDocExporter.cs
var settings = FluentSettings.For<ColumnEntity>(); settings.HasExcelSetting(x => { x.Author = "DbTool"; }) .HasSheetSetting(x => { x.StartRowIndex = 2; x.AutoColumnWidthEnabled = true; x.RowAction = row => { // apply header row style if (row.RowNum == 1) { var headerStyle = row.Sheet.Workbook.CreateCellStyle(); headerStyle.Alignment = HorizontalAlignment.Center; var headerFont = row.Sheet.Workbook.CreateFont(); headerFont.FontHeight = 180; headerFont.IsBold = true; headerFont.FontName = "微軟雅黑"; headerStyle.SetFont(headerFont); row.Cells.ForEach(c => c.CellStyle = headerStyle); } }; x.SheetAction = sheet => { // set merged region sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 0, 0, 6)); // apply title style var titleStyle = sheet.Workbook.CreateCellStyle(); titleStyle.Alignment = HorizontalAlignment.Left; var font = sheet.Workbook.CreateFont(); font.FontHeight = 200; font.FontName = "微軟雅黑"; font.IsBold = true; titleStyle.SetFont(font); titleStyle.FillBackgroundColor = IndexedColors.Black.Index; titleStyle.FillForegroundColor = IndexedColors.SeaGreen.Index; titleStyle.FillPattern = FillPattern.SolidForeground; sheet.GetRow(0).GetCell(0).CellStyle = titleStyle; }; }); // ...
上面的代碼經過 RowAction
配置了 Header 行的單元格的樣式,經過 SheetAction
配置了 Title 行的單元格合併和 Title 單元格的樣式,導出結果以下圖所示:
WeihanLi.Npoi
經過 Fluent API 的方式提供了很是靈活的導入導出配置,若是你也有導入導出 Excel 的需求,能夠了解一下,若是不能知足的地方或者使用過程當中有遇到任何問題歡迎給我提 issue https://github.com/WeihanLi/WeihanLi.Npoi/issues/new/choose
其餘介紹文章:
更多的使用文檔能夠參考項目示例項目,單元測試以及文檔