调用：
var ms = ExcelHelper.PrintInvoiceToExcel("观看时长", headline, items, (row, item) =>
{
row.CreateCell(0).SetCellValue(item.Id.ToString());
row.CreateCell(1).SetCellValue(item.ActivityName);
row.CreateCell(2).SetCellValue(item.MainVenue == 1 ? "主会场" : "分会场");
//row.CreateCell(3).SetCellValue(item.Surname);
row.CreateCell(3).SetCellValue(item.Name);
row.CreateCell(4).SetCellValue(item.Mobile);
row.CreateCell(5).SetCellValue(item.Email);
//row.CreateCell(6).SetCellValue(sec_to_hms(item.Duration));
row.CreateCell(6).SetCellValue(item.UserSumTime.ToString());
row.CreateCell(7).SetCellValue(item.CTime.ToARCTimeString());
row.CreateCell(8).SetCellValue(item.UTime.ToARCTimeString());
row.CreateCell(9).SetCellValue(item.LivelodTime.ToString());
row.CreateCell(10).SetCellValue(item.LiveWatchTime.ToString());
});
public class ExcelHelper : IDisposable
{
private string fileName = null; //文件名
private IWorkbook workbook = null;
private FileStream fs = null;
private bool disposed;
public ExcelHelper(string fileName)
{
this.fileName = fileName;
disposed = false;
}
/// <summary>
/// 将DataTable数据导入到excel中
/// </summary>
/// <param name="data"> 要导入的数据 </param>
/// <param name="isColumnWritten"> DataTable的列名是否要导入 </param>
/// <param name="sheetName"> 要导入的excel的sheet的名称 </param>
/// <returns> 导入数据行数(包含列名那一行) </returns>
public int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten)
{
int i = 0;
int j = 0;
int count = 0;
ISheet sheet = null;
fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
workbook = new XSSFWorkbook();
else if (fileName.IndexOf(".xls") > 0) // 2003版本
workbook = new HSSFWorkbook();
try
{
if (workbook != null)
{
sheet = workbook.CreateSheet(sheetName);
}
else
{
return -1;
}
if (isColumnWritten == true) //写入DataTable的列名
{
IRow row = sheet.CreateRow(0);
for (j = 0; j < data.Columns.Count; ++j)
{
row.CreateCell(j).SetCellValue(data.Columns[j].ColumnName);
}
count = 1;
}
else
{
count = 0;
}
for (i = 0; i < data.Rows.Count; ++i)
{
IRow row = sheet.CreateRow(count);
for (j = 0; j < data.Columns.Count; ++j)
{
row.CreateCell(j).SetCellValue(data.Rows[i][j].ToString());
}
++count;
}
workbook.Write(fs); //写入到excel
return count;
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
return -1;
}
}
/// <summary>
/// 将excel中的数据导入到DataTable中
/// </summary>
/// <param name="sheetName"> excel工作薄sheet的名称 </param>
/// <param name="isFirstRowColumn"> 第一行是否是DataTable的列名 </param>
/// <returns> 返回的DataTable </returns>
public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn)
{
ISheet sheet = null;
DataTable data = new DataTable();
int startRow = 0;
try
{
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
workbook = new XSSFWorkbook(fs);
else if (fileName.IndexOf(".xls") > 0) // 2003版本
workbook = new HSSFWorkbook(fs);
if (sheetName != null)
{
sheet = workbook.GetSheet(sheetName);
if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
{
sheet = workbook.GetSheetAt(0);
}
}
else
{
sheet = workbook.GetSheetAt(0);
}
if (sheet != null)
{
IRow firstRow = sheet.GetRow(0);
int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数
if (isFirstRowColumn)
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
ICell cell = firstRow.GetCell(i);
if (cell != null)
{
string cellValue = cell.StringCellValue;
if (cellValue != null)
{
DataColumn column = new DataColumn(cellValue);
data.Columns.Add(column);
}
}
}
startRow = sheet.FirstRowNum + 1;
}
else
{
startRow = sheet.FirstRowNum;
}
//最后一列的标号
int rowCount = sheet.LastRowNum;
for (int i = startRow; i <= rowCount; ++i)
{
IRow row = sheet.GetRow(i);
if (row == null) continue; //没有数据的行默认是null
DataRow dataRow = data.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
dataRow[j] = row.GetCell(j).ToString();
}
data.Rows.Add(dataRow);
}
}
return data;
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
return null;
}
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (!this.disposed)
{
if (disposing)
{
if (fs != null)
fs.Close();
}
fs = null;
disposed = true;
}
}
#region Excel
#region 生成下载文档
/// <summary>
/// 生成下载饿 EXCEL文档
/// </summary>
/// <typeparam name="T"> </typeparam>
/// <param name="sheetName"> sheet名称 </param>
/// <param name="headline"> 标题列表 </param>
/// <param name="list"> 数据集 </param>
/// <param name="bindRowAction"> 绑定数据委托 </param>
/// <returns> </returns>
public static MemoryStream PrintInvoiceToExcel<T>(string sheetName, string[] headline, List<T> list, Action<IRow, T> bindRowAction)
where T : new()
{
var listHead = new List<string>();
listHead.AddRange(headline.ToList());
//创建工作薄
var wk = new HSSFWorkbook();
//创建一个名称为mySheet的表
var tb = wk.CreateSheet(sheetName);
//创建一行，此行为第二行
var head = tb.CreateRow(0);
var heads = listHead.ToArray();
for (var i = 0; i < heads.Length; i++)
{
var cell = head.CreateCell(i);
cell.SetCellValue(heads[i]);
cell.CellStyle = GetCellStyle(wk, "微软雅黑", HSSFColor.White.Index, 10, HSSFColor.BlueGrey.Index);
}
if (list.Count > 0)
{
var i = 1;
foreach (var item in list)
{
var row = tb.CreateRow(i);
bindRowAction.Invoke(row, item);
i++;
}
}
try
{
var result = new MemoryStream();
wk.Write(result);
return result;
}
catch (Exception)
{
// ignored
}
return null;
}
/// <summary>
/// 获取excel文件名字
/// </summary>
/// <param name="fileName"> </param>
/// <returns> </returns>
public static string GetFileName(string fileName = "")
{
fileName = string.IsNullOrWhiteSpace(fileName) ? DateTime.Now.Ticks.ToString() : fileName;
return $"{fileName}-{DateTime.Now.ToARCBjTime().ToARCDateString()}.xls";
}
private static ICellStyle GetCellStyle(HSSFWorkbook wk, string fontfamily, short fontcolor, int fontsize, short bgColor)
{
ICellStyle cellstyle = wk.CreateCellStyle();
cellstyle.SetFont(GetFontStyle(wk, fontfamily, fontcolor, fontsize));
cellstyle.FillPattern = FillPattern.SolidForeground;
cellstyle.FillForegroundColor = bgColor;
cellstyle.VerticalAlignment = VerticalAlignment.Top;
return cellstyle;
}
private static IFont GetFontStyle(HSSFWorkbook hssfworkbook, string fontfamily, short fontcolor, int fontsize)
{
IFont font1 = hssfworkbook.CreateFont();
if (string.IsNullOrEmpty(fontfamily))
{
font1.FontName = fontfamily;
}
font1.Color = fontcolor;
font1.IsItalic = false;
font1.Boldweight = (short)FontBoldWeight.Bold;
font1.FontHeightInPoints = (short)fontsize;
return font1;
}
#endregion 生成下载文档
#endregion Excel
}
