本人小白，想要實現EXCEL文件中的數據導入到datagridview中，EXCEL中的數據是多行多列，行數和列數不確定，如何實現導入到datagridview中顯示，具體的界面如下：


兩個button，選擇文件button實現選擇Excel文件的功能，并在textbox中顯示文件路徑；button2實現讀取數據到datagridview。

using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Text;
using?System.Threading.Tasks;
using?System.Windows.Forms;

namespace?Datagridview_Exceltest
{
?
?public?partial?class?Form1?:?Form
????{
????????public?Form1()
????????{
????????????InitializeComponent();
????????}

????????private?void?button1_Click(object?sender,?EventArgs?e)
????????{
????????????this.openFileDialog1.ShowDialog();
????????????this.textBox1.Text?=?this.openFileDialog1.FileName;
????????}

????????private?void?button2_Click(object?sender,?EventArgs?e)
????????{
???????????string?fileName?=?"";
???????????fileName?=?this.textBox1.Text;
???????????if?(this.textBox1.Text?!=?"")
???????????{
???????????????try
???????????????{
???????????????????string?strCon?=?"?Provider?=?Microsoft.Jet.OLEDB.4.0?;?Data?Source?=?"?+?fileName?+?"?;Extended?Properties=Excel?8.0";
???????????????????System.Data.OleDb.OleDbConnection?myConn?=?new?System.Data.OleDb.OleDbConnection(strCon);
???????????????????string?strCom?=?"?SELECT?*?FROM?[punishCase$]?";
???????????????????System.Data.OleDb.OleDbDataAdapter?myCommand?=?new?System.Data.OleDb.OleDbDataAdapter(strCom,?myConn);
???????????????????System.Data.DataTable?dt?=?new?System.Data.DataTable();
???????????????????myCommand.Fill(dt);
???????????????????this.dataGridView1.DataSource?=?dt;
???????????????????
???????????????}
???????????????catch
???????????????{
???????????????????MessageBox.Show("請選擇案件導入的EXCEL");

???????????????}
?????????????
???????????????
??????????????
???????????}
???????????else
???????????{
???????????????MessageBox.Show("請選擇Excel文件");
???????????}

????????}
????}
}

調用:?EcxelToDataGridView("test.xls",dataGridView1); ??///?Excel數據導入方法 ????????public?void?EcxelToDataGridView(string?filePath,DataGridView?dgv) ????????{ ????????????//根據路徑打開一個Excel文件并將數據填充到DataSet中 ????????????string?strConn?=?"Provider=Microsoft.Jet.OLEDB.4.0;Data?Source?=?"?+?filePath?+?";Extended?Properties?='Excel?8.0;HDR=NO;IMEX=1'";//HDR=YES?有兩個值:YES/NO,表示第一行是否字段名,默認是YES,第一行是字段名 ????????????OleDbConnection?conn?=?new?OleDbConnection(strConn); ????????????conn.Open(); ????????????string?strExcel?=?""; ????????????OleDbDataAdapter?myCommand?=?null; ????????????DataSet?ds?=?null; ????????????strExcel?=?"select??*?from???[sheet1$]"; ????????????myCommand?=?new?OleDbDataAdapter(strExcel,?strConn); ????????????ds?=?new?DataSet(); ????????????myCommand.Fill(ds,?"table1"); ????????????dataGridView1.DataSource?=?ds.Tables[0].DefaultView;? }

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