把資料匯出excel的應用很廣泛，如果使用依賴於excel的com方法，則難度就很大，而且還必須安裝excel，否則就不能匯出。使用npoi匯出excel很簡單，只需要新增乙個程式集npoi.dll的引用就可以，而且不依賴於excel，也就是不需要安裝excel。自然比依賴於excel的com方法好很多。
核心**
[csharp]view plain
copy
public
static
void exportbyweb(listlist, string strfilename)
//}// 設定編碼和附件格式
#region 新建表，填充表頭，填充列頭，樣式
if (rowindex == 65535 || rowindex == 0)
#region 表頭及樣式
addtitle(workbook, sheet, columnnames.count, "產品線**彙總");
#endregion
#region 列頭及樣式
addcolumntitle(workbook, sheet, columnnames, arrcolumnwidth);
#endregion
rowindex = 2;
} #endregion
writedatarows(list, workbook, columnnames.count, sheet, rowindex);
using (memorystream ms = new memorystream())
} ///
/// 新增第一行的標題
///
///
///
///
///
private
static
void addtitle(hssfworkbook workbook, hssfsheet sheet, int maxcolumncount, string strheadertext)
private
static
void addcolumntitle(hssfworkbook workbook, hssfsheet sheet, list columnnames, int arrcolumnwidth)
} private
static listwritedatarows(listparentlist, hssfworkbook workbook, int maxcolumncount, hssfsheet sheet, int rowindex)
else
count++;
newcell = (hssfcell)datarow.createcell(count);
newcell.cellstyle = style2;
newcell.setcelltype(celltype.numeric);
if (row.p_pricehigh.hasvalue)
else
count++;
newcell = (hssfcell)datarow.createcell(count);
newcell.cellstyle = style2;
newcell.setcelltype(celltype.numeric);
newcell.setcellvalue(row.total_price);
count++;
//}#endregion
rowindex++;
} return listnext;
}
匯出結果
更有通用性的**
[csharp]view plain
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public
static
class exporttofile
} }
///
/// 用於web匯出
///
/// 源datatable
/// 表頭文字
/// 檔名
/// 柳永法 2010-5-8 22:21:41
public
static
void exportbyweb(listlist, string strheadertext, string strfilename, dictionary fieldnames)
private
static memorystream export(listlist, string strheadertext, dictionary fieldnames)
int rowindex = 0;
foreach (tmodel row in list)
#region 表頭及樣式
addfirstrow(workbook, sheet, fieldnames, strheadertext);
#endregion
#region 列頭及樣式
addsecondrow(workbook, sheet, fieldnames, arrcolwidth);
#endregion
rowindex = 2;
} #endregion
#region 填充內容
hssfrow datarow = (hssfrow)sheet.createrow(rowindex);
count = 0;
foreach (keyvaluepair column in fieldnames)
switch (dateytype)
count++;
} #endregion
rowindex++;
} using (memorystream ms = new memorystream())
}
private
static
void addfirstrow(hssfworkbook workbook, hssfsheet sheet, dictionary fieldnames, string strheadertext)
private
static
void addsecondrow(hssfworkbook workbook, hssfsheet sheet, dictionary fieldnames, int arrcolwidth)
} }
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