基於NPOI開源框架寫的ExcelHelper

namespace exceltest}}

/// /// datatable匯出到excel的memorystream
/// 
/// 源datatable
/// 表頭文字
public static memorystream export(datatable dtsource, string strheadertext)
#endregion
hssfcellstyle datestyle = workbook.createcellstyle() as hssfcellstyle;
hssfdataformat format = workbook.createdataformat() as hssfdataformat;
datestyle.dataformat = format.getformat("yyyy-mm-dd");
//取得列寬
int arrcolwidth = new int[dtsource.columns.count];
foreach (datacolumn item in dtsource.columns)
for (int i = 0; i < dtsource.rows.count; i++)}}
int rowindex = 0;
foreach (datarow row in dtsource.rows)
#region 表頭及樣式
#endregion
#region 列頭及樣式
sheet.createfreezepane(0, 2, 0, dtsource.columns.count - 1);
}#endregion
rowindex = 2;
}#endregion
#region 填充內容
hssfrow datarow = sheet.createrow(rowindex) as hssfrow;
foreach (datacolumn column in dtsource.columns)
}#endregion
rowindex++;
}using (memorystream ms = new memorystream())
}/// /// 用於web匯出
/// 
/// 源datatable
/// 表頭文字
/// 檔名
public static void exportbyweb(datatable dtsource, string strheadertext, string strfilename)
/// 讀取excel
/// 預設第一行為標頭
/// 
/// excel文件路徑
/// 
public static datatable import(string strfilename)
hssfsheet sheet = hssfworkbook.getsheetat(0) as hssfsheet;
system.collections.ienumerator rows = sheet.getrowenumerator();
hssfrow headerrow = sheet.getrow(0) as hssfrow;
int cellcount = headerrow.lastcellnum;
for (int j = 0; j < cellcount; j++)
for (int i = (sheet.firstrownum + 1); i <= sheet.lastrownum; i++)
dt.rows.add(datarow);
}return dt;}}
}

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