/// <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[].Rows)

            {

                int i = ;

                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;

        }