C#根据规则生成6位随机码
2024-08-30 23:13:00
#region 获得6位优惠码 zhy
public static string CreatePromoCode(string code)
{
if (code == "")
{
return "a00001";
}
else
{
string new_code = "";
new_code = CreateGrapheme(code);
new_code += CreateNumber(code);
return new_code;
}
}
#endregion #region 拼接字母 zhy
public static string CreateGrapheme(string code)
{
string new_code = "";
//获取字母
string grapheme = GetGrapheme(code);
//获得数字
string num = GetNumber(code);
//最后一个字母为z从新拼接否则获取该字母下一个字母拼接
if (grapheme.Substring(grapheme.Length - ) == "Z")
{
switch (grapheme.Length)
{
case :
if (Convert.ToInt32(num) >= )
{
new_code = "AA";
}
else
{
new_code += grapheme;
}
break;
case :
if (Convert.ToInt32(num) >= )
{
new_code = "AAA";
}
else
{
new_code += grapheme;
}
break;
case :
if (Convert.ToInt32(num) >= )
{
new_code = "AAAA";
}
else
{
new_code += grapheme;
}
break;
case :
if (Convert.ToInt32(num) >= )
{
new_code = "AAAAA";
}
else
{
new_code += grapheme;
}
break;
}
}
else
{
switch (grapheme.Length)
{
case :
if (Convert.ToInt32(num) >= )
{
char new_grapheme = Convert.ToChar(Convert.ToInt16(grapheme.Substring(new_code.Length - ).ToCharArray()[]) + );
new_code += grapheme.Substring(, new_code.Length - ) + new_grapheme.ToString();
num = "";
}
else
{
new_code += grapheme;
}
break;
case :
if (Convert.ToInt32(num) >= )
{
char new_grapheme = Convert.ToChar(Convert.ToInt16(grapheme.Substring(new_code.Length - ).ToCharArray()[]) + );
new_code += grapheme.Substring(, new_code.Length - ) + new_grapheme.ToString();
num = "";
}
else
{
new_code += grapheme;
}
break;
case :
if (Convert.ToInt32(num) >= )
{
char new_grapheme = Convert.ToChar(Convert.ToInt16(grapheme.Substring(new_code.Length - ).ToCharArray()[]) + );
new_code += grapheme.Substring(, new_code.Length - ) + new_grapheme.ToString();
num = "";
}
else
{
new_code += grapheme;
}
break;
case :
if (Convert.ToInt32(num) >= )
{
char new_grapheme = Convert.ToChar(Convert.ToInt16(grapheme.Substring(new_code.Length - ).ToCharArray()[]) + );
new_code += grapheme.Substring(, new_code.Length - ) + new_grapheme.ToString();
num = "";
}
else
{
new_code += grapheme;
}
break;
case :
if (Convert.ToInt32(num) >= )
{
char new_grapheme = Convert.ToChar(Convert.ToInt16(grapheme.Substring(new_code.Length - ).ToCharArray()[]) + );
new_code += grapheme.Substring(, new_code.Length - ) + new_grapheme.ToString();
num = "";
}
else
{
new_code += grapheme;
}
break;
}
}
return new_code;
}
#endregion #region 获得字母 zhy
public static string GetGrapheme(string code)
{
//定义获取字母的正则
Regex grapheme_regex = new Regex(@"[A-Z]+");
//找到字符串中的匹配项
Match grapheme_match = grapheme_regex.Match(code);
return grapheme_match.Value;
}
#endregion #region 获得数字 zhy
public static string GetNumber(string code)
{
//定义获取数字的正则
Regex num_regex = new Regex(@"[^\d.\d]");
//剔除字符串中除数字以外的字符
string num = Regex.Replace(code, @"[^\d.\d]", "").ToString();
return num;
}
#endregion #region 拼接数字 zhy
public static string CreateNumber(string code)
{
string new_code = "";
//获取字母
string grapheme = GetGrapheme(code);
//获得数字
string num = GetNumber(code); int old_num = Convert.ToInt32(num);
//计算字母后的数字
switch (num.ToString().Length)
{
case :
if (old_num < )
{
new_code = new_code + (old_num++);
}
else
{
//优惠码已经配到头
new_code = "";
}
break;
case :
if (old_num < )
{
int temporary_num = old_num;
temporary_num++;
//判断数字是否从01开始
if (temporary_num.ToString().Length == )
{
new_code = new_code + "" + temporary_num.ToString();
}
else
{
new_code = new_code + temporary_num.ToString();
}
}
else
{
//优惠码已经配到头
new_code = new_code + "";
}
break;
case :
if (old_num < )
{
int temporary_num = old_num;
temporary_num++;
//判断数字是否从01开始
if (temporary_num.ToString().Length == )
{
new_code = new_code + "" + temporary_num.ToString();
}
else if (temporary_num.ToString().Length == )
{
new_code = new_code + "" + temporary_num.ToString();
}
else
{
new_code = new_code + temporary_num.ToString();
}
}
else
{
//优惠码已经配到头
new_code = "";
}
break;
case :
if (old_num < )
{
int temporary_num = old_num;
temporary_num++;
//判断数字是否从01开始
if (temporary_num.ToString().Length == )
{
new_code = new_code + "" + temporary_num.ToString();
}
else if (temporary_num.ToString().Length == )
{
new_code = new_code + "" + temporary_num.ToString();
}
else if (temporary_num.ToString().Length == )
{
new_code = new_code + "" + temporary_num.ToString();
}
else
{
new_code = new_code + temporary_num.ToString();
}
}
else
{
//优惠码已经配到头
new_code = "";
}
break;
case :
if (old_num < )
{
int temporary_num = old_num;
temporary_num++;
//判断数字是否从01开始
if (temporary_num.ToString().Length == )
{
new_code = new_code + "" + temporary_num.ToString();
}
else if (temporary_num.ToString().Length == )
{
new_code = new_code + "" + temporary_num.ToString();
}
else if (temporary_num.ToString().Length == )
{
new_code = new_code + "" + temporary_num.ToString();
}
else if (temporary_num.ToString().Length == )
{
new_code = new_code + "" + temporary_num.ToString();
}
else
{
new_code = new_code + temporary_num.ToString();
}
}
else
{
//优惠码已经配到头
new_code = "";
}
break;
}
return new_code;
}
#endregion
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