string source = "c://1.xls";//execel文件的完整路径
string sqlconn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + source + ";Extended Properties=Excel 8.0";
string sql = "SELECT * FROM [Sheet1$]";
OleDbCommand oldcom = new OleDbCommand(sql, new OleDbConnection(sqlconn));
OleDbDataAdapter oleda = new OleDbDataAdapter(oldcom);
DataSet ds = new DataSet();
oleda.Fill(ds, "[Sheet1$]");
this.GridView1.DataSource = ds.Tables[0];
this.GridView1.DataBind();