Excel数据，dataGridview, openFileDialog

从Excel中读取数据，在WinForm界面的DataGridView中进行显示。使用的Excel2007;

 private void btnOpen_Click(object sender, EventArgs e)//文件读取，

        {

            OpenFileDialog openFileDialog = new OpenFileDialog();

            openFileDialog.CheckFileExists = true;//验证文件是否存在

            openFileDialog.CheckPathExists = true;//验证路径

            openFileDialog.FileName = "";//选择文件对话框打开后，选择文件初始化对话框为空

            openFileDialog.Title = "读取文件表格";//选择对话框的名字

            openFileDialog.InitialDirectory = @"c:\库\文档";//初始路径设置

            openFileDialog.Filter = "文件.xlsx|*.xlsm|wenjian.*|*.*";//文件筛选器。注意在VBA中也存在文件筛选器，不过并不是使用|隔开，而是使用，隔开

            if (openFileDialog.ShowDialog() == DialogResult.OK)

            {

                txtOpenFileName.Text = openFileDialog.FileName;

            }

        }

        ////////////////////////////////////////////////////////

       private void btnRead_Click(object sender, EventArgs e)

        {

            String strPath = txtOpenFileName.Text;

            DataTable dataTable =GetDataSet(strPath).Tables["Sheet1"];

            bgwShow.RunWorkerAsync(dataTable.Rows.Count);

            dgvShow1.DataSource = dataTable;//为名字为dgvShow1的dataGridview控件的datasource属性赋值

        }

 public DataSet GetDataSet(String path)

        {

            String strConnection = "";

            OleDbConnection oleDbConnection = null;

            try

            {

                strConnection = "Provider=Microsoft.Ace.OleDb.12.0;" + "data source=" + path +                                                     

         ";Extended Properties='Excel 12.0; HDR=YES;IMEX=1'";//连接字符串，path是Excel文件的绝对路径,可以openFileDialog空间进行读取

                oleDbConnection = new OleDbConnection(strConnection);

                String sql = "SELECT * FROM [sheet1$]";//Excel相当于是一个简单的数据库，所以可以使用查询语句，并且表格要用[]加美元符号

                OleDbDataAdapter oleDbDataAdapter = new OleDbDataAdapter(sql, oleDbConnection);

                DataTable dataTable = new DataTable("Sheet1");//new一个名字为Sheet1的表格，便于填充

                DataSet dataSet = new DataSet();

                dataSet.Tables.Add(dataTable);//将表格放入到dataSet数据集中

                oleDbDataAdapter.Fill(dataSet, "Sheet1");//填充数据集中名为Sheet1的表格

                return dataSet;

            }

            catch (Exception ee)

            {

                throw new Exception(ee.Message);

            }

            finally

            {

              oleDbConnection.Dispose();

            }

        }