/// <summary>/// 点击按钮导入数据/// 作者：lhxhappy/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button1_Click(object sender, EventArgs e){//打开一个文件选择框
OpenFileDialog ofd = new OpenFileDialog();ofd.Title = "Excel文件";ofd.FileName = "";ofd.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);//为了获取特定的系统文件夹，可以使用System.Environment类的静态方法GetFolderPath()。该方法接受一个Environment.SpecialFolder枚举，其中可以定义要返回路径的哪个系统目录
ofd.Filter = "Excel文件(*.xls)|*.xls";ofd.ValidateNames = true;     //文件有效性验证ValidateNames，验证用户输入是否是一个有效的Windows文件名
ofd.CheckFileExists = true;  //验证路径有效性
ofd.CheckPathExists = true; //验证文件有效性string strName = string.Empty;if (ofd.ShowDialog() == DialogResult.OK){strName = ofd.FileName;}if (strName == ""){MessageBox.Show("没有选择Excel文件！无法进行数据导入");return;}//调用导入数据方法
EcxelToDataGridView(strName, this.hpGridView1);}

/// <summary>/// Excel数据导入方法/// 作者:lhxhappy/// </summary>/// <param name="filePath"></param>/// <param name="dgv"></param>public void EcxelToDataGridView(string filePath,DataGridView dgv){//根据路径打开一个Excel文件并将数据填充到DataSet中string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source = " + filePath + ";Extended Properties ='Excel 8.0;HDR=NO;IMEX=1'";//导入时包含Excel中的第一行数据，并且将数字和字符混合的单元格视为文本进行导入
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");//根据DataGridView的列构造一个新的DataTable
DataTable tb = new DataTable();foreach (DataGridViewColumn dgvc in dgv.Columns){if (dgvc.Visible && dgvc.CellType != typeof(DataGridViewCheckBoxCell)){DataColumn dc = new DataColumn();dc.ColumnName = dgvc.DataPropertyName;//dc.DataType = dgvc.ValueType;//若需要限制导入时的数据类型则取消注释，前提是DataGridView必须先绑定一个数据源那怕是空的DataTable
tb.Columns.Add(dc);}}//根据Excel的行逐一对上面构造的DataTable的列进行赋值foreach (DataRow excelRow in ds.Tables[0].Rows){int i = 0;DataRow dr = tb.NewRow();foreach (DataColumn dc in tb.Columns){dr[dc] = excelRow[i];i++;}tb.Rows.Add(dr);}//在DataGridView中显示导入的数据
dgv.DataSource = tb;}