C#中对数据库文件的导入导出Excel

Excel导入数据库

using (Stream stream = File.Open(@"E:\10级net3班信息表.xls", FileMode.Open, FileAccess.Read))//建立流，指向要读取的文件

{

HSSFWorkbook workbook = new HSSFWorkbook(stream);

HSSFSheet sheet = workbook.GetSheet("10级net3班联系表");

excelthreelayer.bll.T_classmessage bstudent = new excelthreelayer.bll.T_classmessage();

//遍历所有行，LastRowNum是最后一行的索引，而不是总的行数，总的行数应该是LastRowNum+1，所以下面使用i<=sheet.LastRowNum或者i<LastRowNum+1

List<excelthreelayer.model.T_classmessage> list = new List<excelthreelayer.model.T_classmessage>();

for (int i = 1; i <= sheet.LastRowNum; i++)

{

HSSFRow row = sheet.GetRow(i);//获取行

excelthreelayer.model.T_classmessage minfo = new excelthreelayer.model.T_classmessage();

minfo.classname = row.GetCell(0).StringCellValue;

minfo.userid = row.GetCell(1).StringCellValue;

minfo.username = row.GetCell(2).StringCellValue;

minfo.tel = row.GetCell(3).StringCellValue;

minfo.QQ = row.GetCell(4).StringCellValue;

list.Add(minfo);

}

bstudent.Add1(list);

MessageBox.Show("操作成功");

}

将数据库的表信息导入Excel文件

excelthreelayer.bll.T_classmessage b = new excelthreelayer.bll.T_classmessage();

int maxid = b.GetMaxId();

using (FileStream stream = new FileStream(@"d:\2010级net班信息表.xls", FileMode.OpenOrCreate, FileAccess.ReadWrite))//建立文件写入流

{

HSSFWorkbook workbook = new HSSFWorkbook();

HSSFSheet sheet = workbook.CreateSheet("net班信息表");

sheet.CreateRow(0).CreateCell(0).SetCellValue("编号");//添加表头

sheet.CreateRow(0).CreateCell(1).SetCellValue("班级名称");

sheet.CreateRow(0).CreateCell(2).SetCellValue("学号");

sheet.CreateRow(0).CreateCell(3).SetCellValue("姓名");

sheet.CreateRow(0).CreateCell(4).SetCellValue("电话");

sheet.CreateRow(0).CreateCell(5).SetCellValue("QQ");

for (int i = 1; i < maxid; i++)

{

excelthreelayer.model.T_classmessage model = b.GetModel(i);//利用方法得到数据行的数据

HSSFRow row = sheet.CreateRow(i);

row.CreateCell(0, HSSFCell.CELL_TYPE_STRING).SetCellValue(model.id);

row.CreateCell(1, HSSFCell.CELL_TYPE_STRING).SetCellValue(model.classname);

row.CreateCell(2, HSSFCell.CELL_TYPE_STRING).SetCellValue(model.userid);

row.CreateCell(3, HSSFCell.CELL_TYPE_STRING).SetCellValue(model.username);

row.CreateCell(4, HSSFCell.CELL_TYPE_STRING).SetCellValue(model.tel);

row.CreateCell(5, HSSFCell.CELL_TYPE_STRING).SetCellValue(model.QQ);

}

workbook.Write(stream);//写入文件流

}