Npoi匯入匯出Excel操作

//

datatable匯出excel
private
static
void gridtoexcelbynpoi(datatable dt, string
strexcelfilename)
icellstyle cellstyle =workbook.createcellstyle();
//為避免日期格式被excel自動替換，所以設定 format 為 『@』 表示一率當成text來看
cellstyle.dataformat = hssfdataformat.getbuiltinformat("@"
);                cellstyle.borderbottom =npoi.ss.usermodel.borderstyle.thin;
cellstyle.borderleft =npoi.ss.usermodel.borderstyle.thin;
cellstyle.borderright =npoi.ss.usermodel.borderstyle.thin;
cellstyle.bordertop =npoi.ss.usermodel.borderstyle.thin;
npoi.ss.usermodel.ifont cellfont =workbook.createfont();
cellfont.boldweight = (short
)fontboldweight.normal;
cellstyle.setfont(cellfont);
//建立內容行
int irowindex = 1
;                
int icellindex = 0
;                
foreach (datarow rowitem in
dt.rows)
icellindex = 0
;                    irowindex++;
}//自適應列寬度
for (int i = 0; i < icolindex; i++)
//寫excel
filestream file = new
filestream(strexcelfilename, filemode.openorcreate);
workbook.write(file);
file.flush();
file.close();
messagebox.show(m_common_resourcemanager.getstring(
"export_to_excel_successfully
"), m_common_resourcemanager.getstring("
information
"), messageboxbuttons.ok, messageboxicon.information);
}catch
(exception ex)
finally 
}

///

///excel檔案導成datatable
///        ///
excel檔案目錄位址
///datatable表名
///excel sheet index
///public
static datatable xlstodatatable(string strfilepath, string strtablename,int
isheetindex)
if (strextname.equals("
.xls
") || strextname.equals("
.xlsx"))
//寫入內容
system.collections.ienumerator rows =sheet.getrowenumerator();
while
(rows.movenext())
datarow dr =dt.newrow();
foreach (icell item in
row.cells)
else
break
;                                        
case
celltype.string:
string str =item.stringcellvalue;
if (!string
.isnullorempty(str))
else
break
;                                        
case
celltype.unknown:
case
celltype.blank:
default
:                                            dr[item.columnindex] = string
.empty;
break
;                                    }
break
;                                
case
celltype.numeric:
if(dateutil.iscelldateformatted(item))
else
break
;                                
case
celltype.string:
string strvalue =item.stringcellvalue;
if (string
.isnullorempty(strvalue))
else
break
;                                
case
celltype.unknown:
case
celltype.blank:
default
:                                    dr[item.columnindex] = string
.empty;
break
;                            }
}dt.rows.add(dr);}}
}return
dt;        }

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