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WeihanLi.Npoi 1.16.0 Release Notes
Intro
最近有网友咨询如何设置单元格样式,在之前的版本中是不支持的,之前主要考虑的是数据,对于导出的样式并没有支持,这个 issue 也让我觉得目前还不是足够的灵活,于是进行了一些探索,增加了更多扩展的可能性,一起来看一下吧
Sheet Setting
因为导入导出是针对某一个 Sheet 而言的,所以支持为不同的 Sheet 设置不同的配置,如果所有 Sheet 的配置都是一样的,则只配置默认的 Sheet 配置就可以了,新版本中增加了三个委托,进一步的增强的导出的灵活性
/// <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; }
可以不同的 Level 扩展自己想要的功能,这些扩展会在写入数据之后执行,可以借此来设置特殊单元格的样式,如果你想也可以重新设置导出的数据,来看下面的示例:
Sample1
首先来看一个设置 Header 字体样式的一个示例,完整代码参考:https://github.com/WeihanLi/WeihanLi.Npoi/blob/310d7637e82210f7558b2a60a637b43485c0e562/samples/DotNetCoreSample/Program.cs#L157
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(); }
导出代码:
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");
导出结果如下:
可以看得出来,我们导出的结果中第一行的样式和别的样式会不同
Another Sample
除了直接导出到 excel 文件之外,还可以支持导出到某一个 sheet 中,我在我的另外一个 DbTool 的项目中也在使用,将原来的一大坨代码做了很大的简化,详细修改可以参考这个 commit: https://github.com/WeihanLi/DbTool/commit/7c7b980714af11e5fec3f8b3babac0904f94cff3#diff-d0ef24afd15ae6aa4ead43fbe31a895c1c051ab9c6e50f4ff4c7544a9592f958R8
最后实际使用的导出代码:
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();
相比之前的代码,大大简化了,原来的代码可以参考https://github.com/WeihanLi/DbTool/commit/7c7b980714af11e5fec3f8b3babac0904f94cff3#diff-d0ef24afd15ae6aa4ead43fbe31a895c1c051ab9c6e50f4ff4c7544a9592f958L17-L121, 100 多行代码,太长了不方便截图
大部分的代码都变成了配置,部分配置代码可以参考下面的代码,具体配置可以参考: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 = "微软雅黑"; 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 = "微软雅黑"; 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; }; }); // ...
上面的代码通过 RowAction
配置了 Header 行的单元格的样式,通过 SheetAction
配置了 Title 行的单元格合并和 Title 单元格的样式,导出结果如下图所示:
More
WeihanLi.Npoi
通过 Fluent API 的方式提供了非常灵活的导入导出配置,如果你也有导入导出 Excel 的需求,可以了解一下,如果不能满足的地方或者使用过程中有遇到任何问题欢迎给我提 issue https://github.com/WeihanLi/WeihanLi.Npoi/issues/new/choose
其他介绍文章:
更多的使用文档可以参考项目示例项目,单元测试以及文档
- 示例项目:https://github.com/WeihanLi/WeihanLi.Npoi/blob/dev/samples/DotNetCoreSample/Program.cs
- 单元测试:https://github.com/WeihanLi/WeihanLi.Npoi/blob/dev/test/WeihanLi.Npoi.Test/ExcelTest.cs
- 文档:https://weihanli.github.io/WeihanLi.Npoi/index.html