1、Access資料庫連線字串，不同版本的版本號不一樣，

accessname即access資料庫表的路徑

 switch (kzm)
            {
                case ".mdb":
                    constr = string.Format("Provider=Microsoft.Jet.OLEDB.4.0; Data Source={0}", accessname);
                    break;
                case ".accdb":
                    constr 
 
= string.Format("Provider=Microsoft.ACE.OLEDB.12.0; Data Source={0}", accessname);
                    break;
            }

2、獲取access表結構資料(欄位，欄位型別)

  /// <summary>
        /// 獲取access表結構資料(欄位，欄位型別)
        /// </summary>
        /// <param name="tablename">表名</param>
        /// <returns></returns>
 

        public static Dictionary<string, string> GetAccessZDType(string tablename, string kzm, string accessname)
        {
            Dictionary<string, string> dic = new Dictionary<string, string>();
            string zdtp = "";
            string constr = CommonClass.GetAccessDifferentVersion(kzm, accessname);

            OleDbConnection connection 
 
= new OleDbConnection(constr);
            connection.Open();
            //獲取access庫表裡的欄位和相關欄位資訊
            DataTable table = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, new object[] { null, null, tablename, null });

            foreach (DataRow row in table.Rows)
            {
                string zd = row["COLUMN_NAME"].ToString(); //欄位名稱
                int lx = int.Parse(row["DATA_TYPE"].ToString()); //欄位型別
                switch (lx)
                {
                    case 2:
                        zdtp = "int";
                        break;
                    case 3:
                        zdtp = "int";
                        break;
                    case 4:
                        zdtp = "Single";
                        break;
                    case 5:
                        zdtp = "double";
                        break;
                    case 6:
                        zdtp = "decimal";
                        break;
                    case 7:
                        zdtp = "DateTime";
                        break;
                    case 11:
                        zdtp = "bool";
                        break;
                    case 17:
                        zdtp = "byte";
                        break;
                    case 72:
                        zdtp = "string";
                        break;
                    case 130:
                        zdtp = "string";
                        break;
                    case 131:
                        zdtp = "decimal";
                        break;
                    case 128:
                        zdtp = "string";
                        break;
                    default:
                        zdtp = "string";
                        break;
                }
                dic.Add(zd, zdtp);
            }
            connection.Close();
            connection.Dispose();
            return dic;
        }

3、Access刪除語句：Delete From 表名 Where ...

需要注意的是：日期格式，因為我再刪除時，有些表主鍵是日期欄位，所以當時試了很多種方法，怎麼格式化都不成功，真是阿西吧！！

最後！終於百度瞥到了某位大神的留言：access日期格式不能用''單引號，必須是#2020/10/20#這樣的方式，以#字元括起來才可以，天吶！！！！！！！

完整語句：Delete From A Where x='你好' and RQ=#2020/08/23# and age=18

記錄以備用！