[AjaxPro.AjaxMethod]
public string GetServer()
{
string name = "";
string conn_str = "provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath(".") + "\\App_Data\\cc.mdb";
//String sql = "select top 1 * from [test] ";
//OleDbConnection conn = new OleDbConnection(conn_str);
//OleDbCommand cmd = new OleDbCommand(sql, conn);
//conn.Open();
//OleDbDataReader reader = cmd.ExecuteReader();
//if (reader.Read())
//{
// name = reader["id"].ToString();
//}
//reader.Close();
//conn.Close();
return "hello";
}把上面的数据库操作注释后,可以获得hello,取消注释就null了为什么
public string GetServer()
{
string name = "";
string conn_str = "provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath(".") + "\\App_Data\\cc.mdb";
//String sql = "select top 1 * from [test] ";
//OleDbConnection conn = new OleDbConnection(conn_str);
//OleDbCommand cmd = new OleDbCommand(sql, conn);
//conn.Open();
//OleDbDataReader reader = cmd.ExecuteReader();
//if (reader.Read())
//{
// name = reader["id"].ToString();
//}
//reader.Close();
//conn.Close();
return "hello";
}把上面的数据库操作注释后,可以获得hello,取消注释就null了为什么
conn.Open();注释到这一句就null了,