C# 导出Excel的6种简单方法实现

using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Excel2016;

  //Create a new workbook
  IWorkbook workbook = application.Workbooks.Create(1);
  IWorksheet sheet = workbook.Worksheets[0];

  //Create a dataset from XML file
  DataSet customersDataSet = new DataSet();
  customersDataSet.ReadXml(Path.GetFullPath(@"../../Data/Employees.xml"));

  //Create datatable from the dataset
  DataTable dataTable = new DataTable();
  dataTable = customersDataSet.Tables[0];

  //Import data from the data table with column header, at first row and first column, 
  //and by its column type.
  sheet.ImportDataTable(dataTable, true, 1, 1, true);

  //Creating Excel table or list object and apply style to the table
  IListObject table = sheet.ListObjects.Create("Employee_PersonalDetails", sheet.UsedRange);

  table.BuiltInTableStyle = TableBuiltInStyles.TableStyleMedium14;

  //Autofit the columns
  sheet.UsedRange.AutofitColumns();

  //Save the file in the given path
  Stream excelStream = File.Create(Path.GetFullPath(@"Output.xlsx"));
  workbook.SaveAs(excelStream);
  excelStream.Dispose();
}

value = instance.ImportDataTable(dataTable, firstRow, firstColumn, importOnSave);

value = instance.ImportDataTable(dataTable, namedRange, showColumnName, rowOffset, colOffset);

using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Excel2016;

  //Read the data from XML file
  StreamReader reader = new StreamReader(Path.GetFullPath(@"../../Data/Customers.xml"));

  //Assign the data to the customerObjects collection
  IEnumerable customerObjects = GetData (reader.ReadToEnd());  

  //Create a new workbook
  IWorkbook workbook = application.Workbooks.Create(1);
  IWorksheet sheet = workbook.Worksheets[0];

  //Import data from customerObjects collection
  sheet.ImportData(customerObjects, 5, 1, false);

  #region Define Styles
  IStyle pageHeader = workbook.Styles.Add("PageHeaderStyle");
  IStyle tableHeader = workbook.Styles.Add("TableHeaderStyle");

  pageHeader.Font.RGBColor = Color.FromArgb(0, 83, 141, 213);
  pageHeader.Font.FontName = "Calibri";
  pageHeader.Font.Size = 18;
  pageHeader.Font.Bold = true;
  pageHeader.HorizontalAlignment = ExcelHAlign.HAlignCenter;
  pageHeader.VerticalAlignment = ExcelVAlign.VAlignCenter;

  tableHeader.Font.Color = ExcelKnownColors.White;
  tableHeader.Font.Bold = true;
  tableHeader.Font.Size = 11;
  tableHeader.Font.FontName = "Calibri";
  tableHeader.HorizontalAlignment = ExcelHAlign.HAlignCenter;
  tableHeader.VerticalAlignment = ExcelVAlign.VAlignCenter;
  tableHeader.Color = Color.FromArgb(0, 118, 147, 60);
  tableHeader.Borders[ExcelBordersIndex.EdgeLeft].LineStyle = ExcelLineStyle.Thin;
  tableHeader.Borders[ExcelBordersIndex.EdgeRight].LineStyle = ExcelLineStyle.Thin;
  tableHeader.Borders[ExcelBordersIndex.EdgeTop].LineStyle = ExcelLineStyle.Thin;
  tableHeader.Borders[ExcelBordersIndex.EdgeBottom].LineStyle = ExcelLineStyle.Thin;
  #endregion

  #region Apply Styles
  //Apply style to the header
  sheet["A1"].Text = "Yearly Sales Report";
  sheet["A1"].CellStyle = pageHeader;

  sheet["A2"].Text = "Namewise Sales Comparison Report";
  sheet["A2"].CellStyle = pageHeader;
  sheet["A2"].CellStyle.Font.Bold = false;
  sheet["A2"].CellStyle.Font.Size = 16;

  sheet["A1:D1"].Merge();
  sheet["A2:D2"].Merge();
  sheet["A3:A4"].Merge();
  sheet["D3:D4"].Merge();
  sheet["B3:C3"].Merge();

  sheet["B3"].Text = "Sales";
  sheet["A3"].Text = "Sales Person";
  sheet["B4"].Text = "January - June";
  sheet["C4"].Text = "July - December";
  sheet["D3"].Text = "Change(%)";
  sheet["A3:D4"].CellStyle = tableHeader;
  sheet.UsedRange.AutofitColumns();
  sheet.Columns[0].ColumnWidth = 24;
  sheet.Columns[1].ColumnWidth = 21;
  sheet.Columns[2].ColumnWidth = 21;
  sheet.Columns[3].ColumnWidth = 16;
  #endregion

  sheet.UsedRange.AutofitColumns();

  //Save the file in the given path
  Stream excelStream = File.Create(Path.GetFullPath(@"Output.xlsx"));
  workbook.SaveAs(excelStream);
  excelStream.Dispose();
}

using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Excel2016;

  //Create a new workbook
  IWorkbook workbook = application.Workbooks.Create(1);
  IWorksheet sheet = workbook.Worksheets[0];

  if(sheet.ListObjects.Count == 0)
  {
    //Estabilishing the connection in the worksheet
    string dBPath = Path.GetFullPath(@"../../Data/EmployeeData.mdb");
    string ConnectionString = "OLEDB;Provider=Microsoft.JET.OLEDB.4.0;Password=\"\";User ID=Admin;Data Source="+ dBPath;
    string query = "SELECT EmployeeID,FirstName,LastName,Title,HireDate,Extension,ReportsTo FROM [Employees]";
    IConnection Connection = workbook.Connections.Add("Connection1", "Sample connection with MsAccess", ConnectionString, query, ExcelCommandType.Sql);
    sheet.ListObjects.AddEx(ExcelListObjectSourceType.SrcQuery, Connection, sheet.Range["A1"]);
  }

  //Refresh Excel table to get updated values from database
  sheet.ListObjects[0].Refresh();

  sheet.UsedRange.AutofitColumns();

  //Save the file in the given path
  Stream excelStream = File.Create(Path.GetFullPath(@"Output.xlsx"));
  workbook.SaveAs(excelStream);
  excelStream.Dispose();
}

#region Loading the data to DataGridView
DataSet customersDataSet = new DataSet();

//Read the XML file with data
string inputXmlPath = Path.GetFullPath(@"../../Data/Employees.xml");
customersDataSet.ReadXml(inputXmlPath);
DataTable dataTable = new DataTable();

//Copy the structure and data of the table
dataTable = customersDataSet.Tables[1].Copy();

//Removing unwanted columns
dataTable.Columns.RemoveAt(0);
dataTable.Columns.RemoveAt(10);
this.dataGridView1.DataSource = dataTable;

dataGridView1.AlternatingRowsDefaultCellStyle.BackColor = Color.White;
dataGridView1.RowsDefaultCellStyle.BackColor = Color.LightBlue;
dataGridView1.ColumnHeadersDefaultCellStyle.Font = new System.Drawing.Font("Tahoma", 9F, ((System.Drawing.FontStyle)(System.Drawing.FontStyle.Bold)));
dataGridView1.ForeColor = Color.Black;
dataGridView1.BorderStyle = BorderStyle.None;
#endregion

using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;

  //Create a workbook with single worksheet
  IWorkbook workbook = application.Workbooks.Create(1);

  IWorksheet worksheet = workbook.Worksheets[0];

  //Import from DataGridView to worksheet
  worksheet.ImportDataGridView(dataGridView1, 1, 1, isImportHeader: true, isImportStyle: true);

  worksheet.UsedRange.AutofitColumns();
  workbook.SaveAs("Output.xlsx");
}

using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Excel2016;

  //Reads input Excel stream as a workbook
  IWorkbook workbook = application.Workbooks.Open(File.OpenRead(Path.GetFullPath(@"../../../Expenses.xlsx")));
  IWorksheet sheet = workbook.Worksheets[0];

  //Preparing first array with different data types
  object[] expenseArray = new object[14]
  {"Paul Pogba", 469.00d, 263.00d, 131.00d, 139.00d, 474.00d, 253.00d, 467.00d, 142.00d, 417.00d, 324.00d, 328.00d, 497.00d, "=SUM(B11:M11)"};

  //Inserting a new row by formatting as a previous row.
  sheet.InsertRow(11, 1, ExcelInsertOptions.FormatAsBefore);

  //Import Peter's expenses and fill it horizontally
  sheet.ImportArray(expenseArray, 11, 1, false);

  //Preparing second array with double data type
  double[] expensesOnDec = new double[6]
  {179.00d, 298.00d, 484.00d, 145.00d, 20.00d, 497.00d};

  //Modify the December month's expenses and import it vertically
  sheet.ImportArray(expensesOnDec, 6, 13, true);

  //Save the file in the given path
  Stream excelStream = File.Create(Path.GetFullPath(@"Output.xlsx"));
  workbook.SaveAs(excelStream);
  excelStream.Dispose();
}

using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Excel2016;

  //Preserve data types as per the value
  application.PreserveCSVDataTypes = true;

  //Read the CSV file
  Stream csvStream = File.OpenRead(Path.GetFullPath(@"../../../TemplateSales.csv")); ;

  //Reads CSV stream as a workbook
  IWorkbook workbook = application.Workbooks.Open(csvStream);
  IWorksheet sheet = workbook.Worksheets[0];

  //Formatting the CSV data as a Table 
  IListObject table = sheet.ListObjects.Create("SalesTable", sheet.UsedRange);
  table.BuiltInTableStyle = TableBuiltInStyles.TableStyleMedium6;
  IRange location = table.Location;
  location.AutofitColumns();

  //Apply the proper latitude & longitude numerformat in the table
  TryAndUpdateGeoLocation(table,"Latitude");
  TryAndUpdateGeoLocation(table,"Longitude");

  //Apply currency numberformat in the table column 'Price'
  IRange columnRange = GetListObjectColumnRange(table,"Price");
  if(columnRange != null)
    columnRange.CellStyle.NumberFormat = "$#,##0.00";

  //Apply Date time numberformat in the table column 'Transaction_date'
  columnRange = GetListObjectColumnRange(table,"Transaction_date");
  if(columnRange != null)
    columnRange.CellStyle.NumberFormat = "m/d/yy h:mm AM/PM;@";

  //Sort the data based on 'Products'
  IDataSort sorter = table.AutoFilters.DataSorter;
  ISortField sortField = sorter. SortFields. Add(0, SortOn. Values, OrderBy. Ascending);
  sorter. Sort();

  //Save the file in the given path
  Stream excelStream;
  excelStream = File.Create(Path.GetFullPath(@"../../../Output.xlsx"));
  workbook.SaveAs(excelStream);
  excelStream.Dispose();
}