将Excel文件导入C＃或VB.Net中的Datagridview

您好我有excel文件与以下字段名称，mobileNo，TotalCoupen.i想要导入这些字段在datagridview唯一的序列号如果一个人总共5 coupen它会显示5 coupen序列像（10001,10002,10003,10004， 10005）我也附上图像

这里是我的代码这个代码加载excel文件成功，但不生成coupen没有它只导入excel文件

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO; using System.Data.SqlClient; using System.Configuration; using System.Data.OleDb; using Excel = Microsoft.Office.Interop.Excel; namespace ReadExcelFileApp { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { dataGridView1.Visible = false; } private void btnChoose_Click(object sender, EventArgs e) { string filePath = string.Empty; string fileExt = string.Empty; OpenFileDialog file = new OpenFileDialog();//open dialog to choose file if (file.ShowDialog() == System.Windows.Forms.DialogResult.OK)//if there is a file choosen by the user { filePath = file.FileName;//get the path of the file fileExt = Path.GetExtension(filePath);//get the file extension if (fileExt.CompareTo(".xls") == 0 || fileExt.CompareTo(".xlsx") == 0) { try { DataTable dtExcel = new DataTable(); dtExcel = ReadExcel(filePath, fileExt);//read excel file dataGridView1.Visible = true; dataGridView1.DataSource = dtExcel; } catch (Exception ex) { MessageBox.Show(ex.Message.ToString()); } } else { MessageBox.Show("Please choose .xls or .xlsx file only.", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Error);//custom messageBox to show error } } } private void btnClose_Click(object sender, EventArgs e) { this.Close();//to close the window(Form1) } public DataTable ReadExcel(string fileName, string fileExt) { string conn = string.Empty; DataTable dtexcel = new DataTable(); if (fileExt.CompareTo(".xls") == 0)//compare the extension of the file conn = @"provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileName + ";Extended Properties='Excel 8.0;HRD=Yes;IMEX=1';";//for below excel 2007 else conn = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1';";//for above excel 2007 using (OleDbConnection con = new OleDbConnection(conn)) { try { OleDbDataAdapter oleAdpt = new OleDbDataAdapter("select * from [Sheet1$]", con);//here we read data from sheet1 oleAdpt.Fill(dtexcel);//fill excel data into dataTable } catch(Exception ex) { MessageBox.Show(ex.Message.ToString()); } } return dtexcel; } } 

}

Answer 1

我不知道为什么你想要添加这些恕我直言重复行。 一个简单的解决scheme是用额外的行创build一个新的DataTable 。 循环遍历Excel数据表中的所有行，然后循环每个新行的total coupen时间，然后更新coupen no如图所示。 我不知道为什么你会这样做，但这是一种方法。 下面的代码使得从ReadExcel方法返回的DataTable一个新的DataTable成为ReadExcel 。 AddDuplicates方法根据需求添加行。

 dtExcel = ReadExcel(filePath, fileExt);//read excel file DataTable dgvTable = AddDuplicates(dtExcel); dataGridView1.Visible = true; //dataGridView1.DataSource = dtExcel; dataGridView1.DataSource = dgvTable; private DataTable AddDuplicates(DataTable dt) { DataTable dtcopy = dt.Clone(); int curCount = 100000; double coupenCount = 0; foreach(DataRow dr in dt.Rows) { coupenCount = (double)dr.ItemArray[2]; for (int i = 0; i < coupenCount; i++) { dtcopy.Rows.Add(dr.ItemArray[0], dr.ItemArray[1], ++curCount); } } return dtcopy; } 

Answer 2

试试这样做。

 using System; using System.Data; using System.Windows.Forms; using System.Data.SqlClient; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { System.Data.OleDb.OleDbConnection MyConnection; System.Data.DataSet DtSet; System.Data.OleDb.OleDbDataAdapter MyCommand; MyConnection = new System.Data.OleDb.OleDbConnection(@"provider=Microsoft.Jet.OLEDB.4.0;Data Source='c:\csharp.net-informations.xls';Extended Properties=Excel 8.0;"); MyCommand = new System.Data.OleDb.OleDbDataAdapter("select * from [Sheet1$]", MyConnection); MyCommand.TableMappings.Add("Table", "Net-informations.com"); DtSet = new System.Data.DataSet(); MyCommand.Fill(DtSet); dataGridView1.DataSource = DtSet.Tables[0]; MyConnection.Close(); } } }