使用WeihanLi.Npoi操作Excel

文章出处:WeihanLi---原文地址

WeihanLi.Npoi

Intro

Npoi 扩展,适用于.netframework4.5及以上和netstandard2.0, .netframework基于NPOI, .netstandard基于DotNetCore.NPOI

NpoiExtensions for target framework net4.5 or netstandard2.0,for net45 basedon NPOI,for .netstandard basedonDotNetCore.NPOI

Use

Install

.NetFramework

Install-Package WeihanLi.Npoi

.NetCore

dotnet add package WeihanLi.Npoi

GetStarted

1. LoadFromExcelFile

   it consider the first row of the sheet as the header not for read,it will read data from next row.You can point out your header row through the exposed api if needed.

• Read Excel to DataSet

  // read excel to dataSet, read all sheets data to dataSet,by default it will read from the headerRowIndex(0) + 1var dataSet = ExcelHelper.ToDataSet(string excelPath);// read excel to dataSet, read all sheets data to dataSet,headerRowIndex is not for read,read from headerRowIndex+1var dataSet = ExcelHelper.ToDataSet(string excelPath, int headerRowIndex);

• Read Excel to DataTable

  // read excel to dataTable directly,by default read the first sheet contentvar dataTable = ExcelHelper.ToDataTable(string excelPath);// read excel workbook's sheetIndex sheet to dataTable directlyvar dataTableOfSheetIndex = ExcelHelper.ToDataTable(string excelPath, int sheetIndex);// read excel workbook's sheetIndex sheet to dataTable,custom headerRowIndexvar dataTableOfSheetIndex = ExcelHelper.ToDataTable(string excelPath, int sheetIndex, int headerRowIndex);// read excel to dataTable use mapping relations and settings from typeof(T),by default read the first sheet contentvar dataTableT = ExcelHelper.ToDataTable<T>(string excelPath);// ... sheetIndex and headerRowIndex is also supported like above

• Read Excel to List

  // read excel first sheet content to a List<T>var entityList = ExcelHelper.ToEntityList<T>(string excelPath);// read excel sheetIndex sheet content to a List<T>// you can custom header row index via sheet attribute or fluent api HasSheetvar entityList1 = ExcelHelper.ToEntityList<T>(string excelPath, int sheetIndex);

// load excel workbook from filevar workbook = LoadExcel(string excelPath);// prepare a workbook accounting to excelPathvar workbook = PrepareWorkbook(string excelPath);// prepare a workbook accounting to excelPath and custom excel settingsvar workbook = PrepareWorkbook(string excelPath, ExcelSetting excelSetting);// prepare a workbook whether *.xlsx filevar workbook = PrepareWorkbook(bool isXlsx);// prepare a workbook whether *.xlsx file and custom excel settingvar workbook = PrepareWorkbook(bool isXlsx, ExcelSetting excelSetting);

List<TEntity> ToEntityList<TEntity>([NotNull]this IWorkbook workbook)DataTable ToDataTable([NotNull]this IWorkbook workbook)

ISheet ImportData<TEntity>([NotNull] this ISheet sheet, DataTable dataTable)int ImportData<TEntity>([NotNull] this IWorkbook workbook, IEnumerable<TEntity> list,            int sheetIndex)int ImportData<TEntity>([NotNull] this ISheet sheet, IEnumerable<TEntity> list)int ImportData<TEntity>([NotNull] this IWorkbook workbook, [NotNull] DataTable dataTable,            int sheetIndex)

ToExcelFile<TEntity>([NotNull] this IEnumerable<TEntity> entityList,
            [NotNull] string excelPath)int ToExcelStream<TEntity>([NotNull] this IEnumerable<TEntity> entityList,
            [NotNull] Stream stream)byte[] ToExcelBytes<TEntity>([NotNull] this IEnumerable<TEntity> entityList)int ToExcelFile([NotNull] this DataTable dataTable, [NotNull] string excelPath)int ToExcelStream([NotNull] this DataTable dataTable, [NotNull] Stream stream)byte[] ToExcelBytes([NotNull] this DataTable dataTable)byte[] ToExcelBytes([NotNull] this IWorkbook workbook)int WriteToFile([NotNull] this IWorkbook workbook, string filePath)object GetCellValue([NotNull] this ICell cell, Type propertyType)

T GetCellValue<T>([NotNull] this ICell cell)SetCellValue([NotNull] this ICell cell, object value)

Define Custom Mapping and settings

1. Attributes

   Add ColumnAttribute on the property of the entity which you used for export or import

   Add SheetAttribute on the entity which you used for export or import,you can set the StartRowIndex on your need(by default it is 1)

   for example:

   public class TestEntity{
       [Column("PKID")]    public int PKID { get; set; }
   
       [Column("账单标题")]    public string BillTitle { get; set; }
   
       [Column("账单详情")]    public string BillDetails { get; set; }
   
       [Column("创建人")]    public string CreatedBy { get; set; }
   
       [Column("创建时间")]    public DateTime CreatedTime { get; set; }
   }internal class TestEntity1{    /// <summary>
       /// 用户名
       /// </summary>
       [Column("用户名")]    public string Username { get; set; }
   
       [Column(IsIgnored = true)]    public string PasswordHash { get; set; }
   
       [Column("可用余额")]    public decimal Amount { get; set; } = 1000M;
   
       [Column("微信id")]    public string WechatOpenId { get; set; }
   
       [Column("是否启用")]    public bool IsActive { get; set; }
   }

2. FluentApi

   You can also use FluentApi above version 1.0.3

   for example:

   var setting = ExcelHelper.SettingFor<TestEntity>();// ExcelSettingsetting.HasAuthor("WeihanLi")
       .HasTitle("WeihanLi.Npoi test")
       .HasDescription("")
       .HasSubject("");
   
   setting.HasSheetConfiguration(0, "系统设置列表");
   
   setting.HasFilter(0, 1)
       .HasFreezePane(0, 1, 2, 1);
   setting.Property(_ => _.SettingId)
       .HasColumnIndex(0);
   
   setting.Property(_ => _.SettingName)
       .HasColumnTitle("设置名称")
       .HasColumnIndex(1);
   
   setting.Property(_ => _.DisplayName)
       .HasColumnTitle("设置显示名称")
       .HasColumnIndex(2);
   
   setting.Property(_ => _.SettingValue)
       .HasColumnTitle("设置值")
       .HasColumnIndex(3);
   
   setting.Property(_ => _.CreatedTime)
       .HasColumnTitle("创建时间")
       .HasColumnIndex(5)
       .HasColumnFormatter("yyyy-MM-dd HH:mm:ss");
   
   setting.Property(_ => _.CreatedBy)
       .HasColumnIndex(4)
       .HasColumnTitle("创建人");
   
   setting.Property(_ => _.UpdatedBy).Ignored();
   setting.Property(_ => _.UpdatedTime).Ignored();
   setting.Property(_ => _.PKID).Ignored();

Samples

• dotnetcore sample

• dotnet sample

Contact

Contact me: weihanli@outlook.com

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