不知这个错误是什么原因
这段代码怎么会出错??
string mySelectQuery = "SELECT cn_id,cn_n_parentid FROM tn_sys_product";
OleDbConnection myConnection = new OleDbConnection(System.Configuration.ConfigurationSettings.AppSettings["strConnection"].ToString());
OleDbCommand myCommand = new OleDbCommand(mySelectQuery,myConnection);
myConnection.Open();
OleDbDataReader myReader;
myReader = myCommand.ExecuteReader();
while (myReader.Read())
{
Response.Write( myReader.GetString(1));
}
myReader.Close();
myConnection.Close();
未指定的错误:E_FAIL(0x80004005)
说明: 执行当前 Web 请求期间,出现未处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。
异常详细信息: System.Data.OleDb.OleDbException: 未指定的错误:E_FAIL(0x80004005)
源错误:
行 24: myConnection.Open();
行 25: OleDbDataReader myReader;
行 26: myReader = myCommand.ExecuteReader();
行 27: // Always call Read before accessing data.
行 28: while (myReader.Read())