Question

我有从文本文件读取和保存AppSetting的类。现在，我想使用密码将txt文件更改为Access File。问题是我不知道怎么写。这是我的代码：

PreparedStatement

我的问题是我真的不知道如何连接具有密码的访问文件以及如何读取它。

Answer 1

我终于找到办法了，我想分享一下

 public static string HashKey = "hometelaccess";


    public static string GetValue(string key)
    {
        key = key.ToLower();
        List<KeyValue> lstKeyValue = GetLstKeyValue();
        return lstKeyValue.FirstOrDefault(x => x.Key == key)?.Value.Decrypt(HashKey);
    }

    private static List<KeyValue> GetLstKeyValue()
    {

            List<KeyValue> lstKeyValue = new List<KeyValue>();
            var conectstring = $"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={Application.StartupPath + "/DataString.mdb"};Jet OLEDB:Database Password =123987741963;";
            try
            {
                using (OleDbConnection conection = new OleDbConnection())
                {
                    using (OleDbCommand ocm = new OleDbCommand())
                    {
                        conection.ConnectionString = conectstring;
                        conection.Open();
                        ocm.Connection = conection;


                        OleDbDataAdapter command = new OleDbDataAdapter("select * from [Tbl_Config]", conection);

                        System.Data.DataTable dt = new System.Data.DataTable();
                        command.Fill(dt);

                        foreach (DataRow row in dt.Rows)
                        {
                            lstKeyValue.Add(new KeyValue { Key = row["Key"].ToString(), Value = row["Value"].ToString() });

                        }

                        conection.Close();
                    }
                }
            }
            catch (Exception e)
            {

            }

            return lstKeyValue;
        }

    public static void SaveToConfig(string key, string value)
    {
        key = key.ToLower();

        if (!File.Exists(filePath))
            File.Create(filePath);

        List<KeyValue> lstKeyValue = GetLstKeyValue();
        var conectstring = $"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={Application.StartupPath + "/Datastring.mdb"};Jet OLEDB:Database Password =123987741963;";
        try
        {
            using (OleDbConnection conection = new OleDbConnection())
            {
                using (OleDbCommand ocm = new OleDbCommand())
                {
                    conection.ConnectionString = conectstring;

                    ocm.Connection = conection;

                    conection.Open();
                    KeyValue keyValue = lstKeyValue.FirstOrDefault(x => x.Key == key);
                    if (keyValue == null)
                    {
                       var x= ocm.CommandText = "Insert Into [Tbl_Config] ([Key] , [Value]) VALUES(?,?)";       
                        ocm.Parameters.AddWithValue("key", key);
                        ocm.Parameters.AddWithValue("Value", value.Encrypt(HashKey));

                        ocm.ExecuteNonQuery();
                    }

                    else
                    {
                        ocm.CommandText = "UPDATE [Tbl_Config] SET [Value]=? where [Key]=?";                           
                        ocm.Parameters.Add("@Value", OleDbType.LongVarWChar).Value = value.Encrypt(HashKey);
                        ocm.Parameters.Add("@key", OleDbType.LongVarWChar).Value = key;
                        ocm.ExecuteNonQuery();
                    }


                    conection.Close();
                }
            }
        }
        catch (Exception e)
        {

        }

    }

使用C＃中的密码从访问文件保存和读取AppSetting

1 个答案: