自动编号字段

Question

我想在帐户实体上创建自动编号插件。如果帐户名称= Morgan Stanely然后帐号= MORG00001，如果帐户名称=摩根汽车，则帐号= MORG00002，如果帐户名称为ABC Tech，则帐号应为ABCT00001。

帐号接受帐户名的前4个字符并附加4个零，如果已存在具有相同4个字符的帐户名，则将其递增1。

方法名称：newaccounname（）

我写的代码：

    public void updaterecord(EntityCollection account)
    {
        int totalrecords = account.Entities.Count;
        string[] name = new string[totalrecords];
        string append = "0000";
        string value = "1";
        int number = int.Parse(value);

        string[] accountnumber = new string[totalrecords];
        for (int i = 0; i < totalrecords; i++)
        {
            ////check the accountname and take first 4 characters from it.

            name[i] = account.Entities[i].Attributes["name"].ToString();
            string partialstring = name[i].Substring(0, 4);
            if (entity.Attributes.Contains("accountnumber") == false)
            {

                string anumber = string.Concat(partialstring, append, value);
                entity.Attributes.Add("accountnumber", anumber.ToString());
            }
            else if (entity.Attributes.Contains("accountnumber") == true)
            {
                newaccountname(account);
            }

        }
    }
    public void newaccountname(EntityCollection account)
    {
        int totalrecords = account.Entities.Count;
        string[] name = new string[totalrecords];
        string[] accountnumber = new string[totalrecords];
        for (int i = 0; i < totalrecords; i++)
        {
            string accountNumber = entity.GetAttributeValue<string>("accountnumber");
            accountnumber[i] = account.Entities[i].Attributes["accountnumber"].ToString();
            name[i] = account.Entities[i].Attributes["name"].ToString();
            string paccountnumber = accountnumber[i].Substring(0, 4);
            if(name[i] == paccountnumber)
            {
                //
            }
        }


    }
}