解决:试读取或写入受保护的内存。这通常指示其他内存已损坏

 

            using (OleDbConnection conn = new OleDbConnection(ConnectionString.ConnString))
            {
                using (OleDbCommand cmd = new OleDbCommand())
                {
                    try
                    {
                        cmd.CommandText = "select * from 新闻 where 编号=@编号";
                        cmd.Parameters.AddWithValue("@编号", Request.QueryString["id"].ToString());
                        cmd.Connection = conn;
                        conn.Open();
                        OleDbDataReader odr = cmd.ExecuteReader(CommandBehavior.SingleRow);
                            if (odr.Read())
                            {
                                la_Title.Text = odr["标题"].ToString();
                                Li_Date.Text = odr["发布时间"].ToString();
                                Li_LaiYuan.Text = odr["来源"].ToString();
                                Li_Content.Text = odr["内容"].ToString();
                            }
                    }
                    catch
                    { 
                    }
                    finally
                    { 
                        conn.Close();
                    }
                }
            }

运行上面的代码时报错:试读取或写入受保护的内存。这通常指示其他内存已损坏

其实是由于代码的错误造成的,原因是由于OleDbDataReader对象没有关闭

            using (OleDbConnection conn = new OleDbConnection(ConnectionString.ConnString))
            {
                using (OleDbCommand cmd = new OleDbCommand())
                {
                    try
                    {
                        cmd.CommandText = "select * from 新闻 where 编号=@编号";
                        cmd.Parameters.AddWithValue("@编号", Request.QueryString["id"].ToString());
                        cmd.Connection = conn;
                        conn.Open();
                        OleDbDataReader odr = cmd.ExecuteReader(CommandBehavior.SingleRow);
                        using (odr)
                        {
                            if (odr.Read())
                            {
                                la_Title.Text = odr["标题"].ToString();
                                Li_Date.Text = odr["发布时间"].ToString();
                                Li_LaiYuan.Text = odr["来源"].ToString();
                                Li_Content.Text = odr["内容"].ToString();
                            }
                        }
                    }
                    catch
                    { 
                    }
                    finally
                    { 
                        conn.Close();
                    }
                }
            }