C#用NPOI读取Excel数据到数据库中行的顺序乱怎么办？

Posted 2023-04-18

private void button4_Click(object sender, EventArgs e)

string filepath= @"D:\temp1.xlsx";
FileStream filestream = new FileStream(filepath, FileMode.OpenOrCreate,FileAccess.ReadWrite);
//filestream.Position=0;
XSSFWorkbook workbook = new XSSFWorkbook(filestream);
int sheetcount = workbook.Count;
if (sheetcount > 0)

var sheet = workbook.GetSheetAt(0);
for (int i = 1; i <= sheet.LastRowNum; i++)

IRow row = sheet.GetRow(i);
string tempname = Dqml(row,0);
string tempmm = Dqml(row,1);
sjvlj(tempname,tempmm);





void sjvlj(string a,string b)

SqlConnection conn = new SqlConnection();
conn.ConnectionString = "Data Source=(local);Initial Catalog=MF;User ID=sa;Pwd=P@ssw0rd";
conn.Open();
SqlTransaction sqltran = conn.BeginTransaction();
// textBox1.Text = a;
string sqlstring = string.Format("insert into table_4(yhm,mm) values('0','1')", a,b);

SqlCommand comm = new SqlCommand(sqlstring,conn);
comm.Transaction = sqltran;
int p = comm.ExecuteNonQuery();
sqltran.Commit();
comm.Dispose();
comm.Clone();
conn.Dispose();
conn.Close();



string Dqml(IRow row, int l)

if (row != null)

ICell cell = row.GetCell(l);
if (cell != null)

if (cell.CellType == CellType.String)
return cell.StringCellValue.Trim();

if (cell.CellType == CellType.Numeric)

return cell.NumericCellValue.ToString().Trim();

return cell.StringCellValue.Trim();

return string.Empty;

这里可以直接在vs程序中引入Spire.Xls.dll这一个dll程序集文件就可以实现数据的导入导出了。可以直接在NuGet中搜索安装，以下是导入excel数据到datatable的代码方法：

//创建Workbook对象并加载Excel文档

Workbook workbook = new Workbook();workbook.LoadFromFile(@"F:\\ExportData.xlsx" ,ExcelVersion.Version2013);

//获取第一张

sheetWorksheet sheet = workbook.Worksheets[0];

//设置range范围

CellRange range = sheet.Range[sheet.FirstRow, sheet.FirstColumn, sheet.LastRow, sheet.LastColumn];

//输出数据, 同时输出列名以及公式值

DataTable dt = sheet.ExportDataTable(range, true, true);

追问

这个东西没有用过能不能给我一个完整的例子？我照葫芦画瓢一下。看嫩不嫩满足需求。

参考技术A 一、下载引用

下载需要引用的dll，即：NPOI.dll，NPOI.OOXML.dll，NPOI.OpenXml4Net.dll，ICSharpCode.SharpZipLib.dll（office2007版需要此dll）。

二、excel转datatable类

[csharp] view
plain copy

using System;

using System.Data;

using System.IO;

using NPOI.SS.UserModel;

using NPOI.XSSF.UserModel;

using NPOI.HSSF.UserModel;

namespace NPOIOprateExcel



public class ExcelUtility



/// <summary>

/// 将excel导入到datatable

/// </summary>

/// <param name="filePath">excel路径</param>

/// <param name="isColumnName">第一行是否是列名</param>

/// <returns>返回datatable</returns>

public static DataTable ExcelToDataTable(string filePath, bool isColumnName)



DataTable dataTable = null;

FileStream fs = null;

DataColumn column = null;

DataRow dataRow = null;

IWorkbook workbook = null;

ISheet sheet = null;

IRow row = null;

ICell cell = null;

int startRow = 0;

try



using (fs = File.OpenRead(filePath))



// 2007版本

if (filePath.IndexOf(".xlsx") > 0)

workbook = new XSSFWorkbook(fs);

// 2003版本

else if (filePath.IndexOf(".xls") > 0)

workbook = new HSSFWorkbook(fs);

if (workbook != null)



sheet = workbook.GetSheetAt(0);//读取第一个sheet，当然也可以循环读取每个sheet

dataTable = new DataTable();

if (sheet != null)



int rowCount = sheet.LastRowNum;//总行数

if (rowCount > 0)



IRow firstRow = sheet.GetRow(0);//第一行

int cellCount = firstRow.LastCellNum;//列数

//构建datatable的列

if (isColumnName)



startRow = 1;//如果第一行是列名，则从第二行开始读取追问

你好！能不能把后面的代码也给我？这样做数据库表是顺序和Excel表里的顺序就一致了吗？我的错在哪里？

参考技术B

你判断是否乱序是根据哪个字段，此字段是否自动增长？

如果没有自动增长字段，查询时候也没指定order by，那么sql本身也没保证顺序，属于正常现象

你在单个insert周围用了事务，没什么意义

追问

我原来的Excel表里面是有日期，是连续的。但是按照我的方式导入到数据库中日期就不连续了。

追答

那你select的时候oder by date即可

参考技术C 乱就乱了，数据库中行的顺序无所谓，反正用的时候order by一下就行了。

NPOI读取Excel，导入数据到Excel练习01

NPOI 2.2.0.0,初级读取导入Excel

1.读取Excel，将数据绑定到dgv上

 1         private void button1_Click(object sender, EventArgs e)
 2         {
 3             List<Book> books = new List<Book>();
 4             //1.读取Excel文件
 5             using (FileStream fsReder = File.OpenRead("练习.xlsx"))
 6             {
 7                 //2.创建工作簿
 8                 IWorkbook wk = new XSSFWorkbook("练习.xlsx");
 9                 //IWorkbook wk=new XSSFWorkbook(fsReder);
10                 //获取第一个工作表
11                 ISheet sheet = wk.GetSheetAt(0);
12                 //3.遍历每一行,行和列的索引都是从0开始
13                 for (int i = 3; i < sheet.LastRowNum; i++)
14                 {
15                     IRow row = sheet.GetRow(i);
16                     //MessageBox.Show(row.GetCell(0).ToString());
17                     //4.读取每一行的数据，加到对象中
18                     books.Add(new Book()
19                     {
20                         Name = row.GetCell(0).ToString(),
21                         One = row.GetCell(1).ToString(),
22                         Two = row.GetCell(2).ToString(),
23                         Three = row.GetCell(3).ToString(),
24                         Four = row.GetCell(4).ToString(),
25                         Five = row.GetCell(5).ToString(),
26                         Six = row.GetCell(6).ToString(),
27 
28                     });
29                 }
30             }
31             //5.绑定数据
32             dgv.DataSource = books;
33             dgv.AutoGenerateColumns = false;
34             dgv.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
35             MessageBox.Show("操作完成");
36         }

View Code

　　2.将数据导入到Excel中

 1         private void button2_Click(object sender, EventArgs e)
 2         {
 3             List<Book> books = new List<Book>()
 4             {
 5                 new Book() {Name = "火影忍者",One  ="34",Two = "56",Three = "67",Four = "78",Five = "99",Six = "54"},
 6                 new Book() {Name = "海贼王",  One ="64",Two = "79",Three = "97",Four = "74",Five = "29",Six = "56"},
 7                 new Book() {Name = "死神",One  ="94",Two = "51",Three = "57",Four = "64",Five = "90",Six = "74"},
 8                 new Book() {Name = "游戏王",One  ="94",Two = "30",Three = "56",Four = "45",Five = "58",Six = "46"},
 9             };
10             //1.创建工作簿
11             using (FileStream fsWrite = File.OpenWrite("1.xlsx"))
12             {
13                 IWorkbook wk = new XSSFWorkbook();
14                 //2.创建第一个工作表
15                 ISheet sheet = wk.CreateSheet("第一张表");
16                 //第一行设置标题
17                 IRow rowHead = sheet.CreateRow(0);
18 
19                 rowHead.CreateCell(0).SetCellValue("图书名");                
20                 rowHead.CreateCell(1).SetCellValue("一月");              
21                 rowHead.CreateCell(2).SetCellValue("二月");           
22                 rowHead.CreateCell(3).SetCellValue("三月");
23                 rowHead.CreateCell(4).SetCellValue("四月");
24                 rowHead.CreateCell(5).SetCellValue("五月");
25                 rowHead.CreateCell(6).SetCellValue("六月");
26 
27                 //3.在工作表的最后一行下，循环创建工作表的每一行，添加数据
28                 for (int i = 1; i < books.Count; i++)
29                 {
30                     IRow row = sheet.CreateRow(i);
31                     row.CreateCell(0).SetCellValue(books[i].Name);
32                     row.CreateCell(1).SetCellValue(books[i].One);
33                     row.CreateCell(2).SetCellValue(books[i].Two);
34                     row.CreateCell(3).SetCellValue(books[i].Three);
35                     row.CreateCell(4).SetCellValue(books[i].Four);
36                     row.CreateCell(5).SetCellValue(books[i].Five);
37                     row.CreateCell(6).SetCellValue(books[i].Six);
38                 }
39                 wk.Write(fsWrite);
40             }
41 
42             MessageBox.Show("操作完成");
43         }

View Code