本文为大家分享了C#导入导出Excel数据的具体代码,供大家参考,具体内容如下
注:对于实体类对象最好新建一个并且继承原有实体类,这样可以将类型进行修改;
方法一:此种方法是用EPPLUS中的FileInfo流进行读取的(是不是流我还真不太了解,若有懂得请留言,非常感谢了)
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using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
using
System.Threading.Tasks;
using
Abp.Extensions;
namespace
HYZT.Ltxy.International.Ctrip.Exporting
{
public
class
ExcelLib
{
public
ICtripPolicyExcelImport GetExcel(
string
filePath)
{
if
(filePath.Trim() .IsNullOrEmpty())
throw
new
Exception(
"文件名不能为空"
);
//因为这儿用得是EPPLUS对Excel进行的操作,所以只能操作
//2007以后的版本以后的(即扩展名为.xlsx)
if
(!filePath.Trim().EndsWith(
"xlsx"
))
throw
new
Exception(
"请使用office Excel 2007版本或2010版本"
);
else
if
(filePath.Trim().EndsWith(
"xlsx"
))
{
ICtripPolicyExcelImport res =
new
CtripPolicyExcelImport(filePath.Trim());
return
res;
}
else
return
null
;
}
}
}
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方法接口:
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using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
using
System.Threading.Tasks;
namespace
HYZT.Ltxy.International.Ctrip.Exporting
{
public
interface
ICtripPolicyExcelImport
{
///
bool
Open();
//ExcelVersion Version { get; }
///
string
FilePath {
get
;
set
; }
///
bool
IfOpen {
get
; }
///
int
SheetCount {
get
; }
///
int
CurrentSheetIndex {
get
;
set
; }
///
int
GetRowCount();
///
int
GetColumnCount();
///
/// 行序号
int
GetCellCountInRow(
int
Row);
///
/// 行序号
/// 列序号
string
GetCellValue(
int
Row,
int
Col);
///
void
Close();
}
}
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方法实现:
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using
OfficeOpenXml;
using
System;
using
System.Collections.Generic;
using
System.IO;
using
System.Linq;
using
System.Text;
using
System.Threading.Tasks;
namespace
HYZT.Ltxy.International.Ctrip.Exporting
{
public
class
CtripPolicyExcelImport:ICtripPolicyExcelImport
{
public
CtripPolicyExcelImport()
{ }
public
CtripPolicyExcelImport(
string
path)
{ filePath = path; }
private
string
filePath =
""
;
private
ExcelWorkbook book =
null
;
private
int
sheetCount = 0;
private
bool
ifOpen =
false
;
private
int
currentSheetIndex = 0;
private
ExcelWorksheet currentSheet =
null
;
private
ExcelPackage ep =
null
;
public
bool
Open()
{
try
{
ep =
new
ExcelPackage(
new
FileInfo(filePath));
if
(ep ==
null
)
return
false
;
book =ep.Workbook;
sheetCount = book.Worksheets.Count;
currentSheetIndex = 0;
currentSheet = book.Worksheets[1];
ifOpen =
true
;
}
catch
(Exception ex)
{
throw
new
Exception(ex.Message);
}
return
true
;
}
public
void
Close()
{
if
(!ifOpen || ep ==
null
)
return
;
ep.Dispose();
}
//public ExcelVersion Version
//{ get { return ExcelVersion.Excel07; } }
public
string
FilePath
{
get
{
return
filePath; }
set
{ filePath = value; }
}
public
bool
IfOpen
{
get
{
return
ifOpen; } }
public
int
SheetCount
{
get
{
return
sheetCount; } }
public
int
CurrentSheetIndex
{
get
{
return
currentSheetIndex; }
set
{
if
(value != currentSheetIndex)
{
if
(value >= sheetCount)
throw
new
Exception(
"工作表序号超出范围"
);
currentSheetIndex = value;
currentSheet =book.Worksheets[currentSheetIndex+1];
}
}
}
public
int
GetRowCount()
{
if
(currentSheet ==
null
)
return
0;
return
currentSheet.Dimension.End.Row;
}
public
int
GetColumnCount()
{
if
(currentSheet ==
null
)
return
0;
return
currentSheet.Dimension.End.Column;
}
public
int
GetCellCountInRow(
int
Row)
{
if
(currentSheet ==
null
)
return
0;
if
(Row >= currentSheet.Dimension.End.Row)
return
0;
return
currentSheet.Dimension.End.Column;
}
//根据行号和列号获取指定单元格的数据
public
string
GetCellValue(
int
Row,
int
Col)
{
if
(currentSheet ==
null
)
return
""
;
if
(Row >= currentSheet.Dimension.End.Row || Col >= currentSheet.Dimension.End.Column)
return
""
;
object
tmpO =currentSheet.GetValue(Row+1, Col+1);
if
(tmpO ==
null
)
return
""
;
return
tmpO.ToString();
}
}
}
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方法调用实现功能:
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//用于程序是在本地,所以此时的路径是本地电脑的绝对路劲;
//当程序发布后此路径应该是服务器上的绝对路径,所以在此之前还要有
//一项功能是将本地文件上传到服务器上的指定位置,此时在获取路径即可
public
string
GetExcelToCtripPolicy(
string
filePath)
{
ExcelLib lib =
new
ExcelLib();
if
(filePath ==
null
)
return
new
ReturnResult<
bool
>(
false
,
"未找到相应文件"
);
string
str= tmp.GetCellValue(i, j);
return
str;
}
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方法二:将Excel表格转化成DataTable表,然后在对DataTable进行业务操作
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using
Abp.Application.Services;
using
OfficeOpenXml;
using
System;
using
System.Collections.Generic;
using
System.Data;
using
System.IO;
using
System.Linq;
using
System.Text;
using
System.Threading.Tasks;
namespace
HYZT.Ltxy.International.Ctrip.GetExcelToDataTable
{
public
class
EPPlusHelperAppService:ApplicationService,IEPPlusHelperAppService
{
private
static
string
GetString(
object
obj)
{
try
{
return
obj.ToString();
}
catch
(Exception ex)
{
return
""
;
}
}
///
///将指定的Excel的文件转换成DataTable (Excel的第一个sheet)
///
/// 文件的绝对路径
///
public
DataTable WorksheetToTable(
string
filePath)
{
try
{
FileInfo existingFile =
new
FileInfo(filePath);
ExcelPackage package =
new
ExcelPackage(existingFile);
ExcelWorksheet worksheet = package.Workbook.Worksheets[1];
//选定 指定页
return
WorksheetToTable(worksheet);
}
catch
(Exception)
{
throw
;
}
}
///
/// 将worksheet转成datatable
///
/// 待处理的worksheet
///
public
static
DataTable WorksheetToTable(ExcelWorksheet worksheet)
{
//获取worksheet的行数
int
rows = worksheet.Dimension.End.Row;
//获取worksheet的列数
int
cols = worksheet.Dimension.End.Column;
DataTable dt =
new
DataTable(worksheet.Name);
DataRow dr =
null
;
for
(
int
i = 1; i <= rows; i++)
{
if
(i > 1)
dr = dt.Rows.Add();
for
(
int
j = 1; j <= cols; j++)
{
//默认将第一行设置为datatable的标题
if
(i == 1)
dt.Columns.Add(GetString(worksheet.Cells[i, j].Value));
//剩下的写入datatable
else
dr[j - 1] = GetString(worksheet.Cells[i, j].Value);
}
}
return
dt;
}
}
}
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之前我有一个程序用的是方法一进行Excel导入的,速度不是很快,后来我又用了第二种方法但是速度更慢了,到底这两种方法哪种快,请指导,还是我用第二种方法的时候业务判断有问题,不得而知,就请明白人指导我到底这两种方法哪种比较好些。