public static string GetRandomString(RandomStringType randomType, int stringLength, int seed)
{
string[] sCaptions = new string[] { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" };
string[] sNumbers = new string[] { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
Random rnd = new Random(seed);
string sResult = string.Empty;
for (int i = 0; i < stringLength; i++)
{
if (randomType == RandomStringType.OnlyNumber)
{
sResult += sNumbers[rnd.Next(0, 9)];
}
else if (randomType == RandomStringType.OnlyChar)
{
sResult += sCaptions[rnd.Next(0, 25)];
}
else if (randomType == RandomStringType.NumberAndChar)
{
sResult += sNumbers[rnd.Next(0, 9)] + sCaptions[rnd.Next(0, 25)];
sResult = sResult.Remove(rnd.Next(0, sResult.Length - 1), 1);
}
}
return(sResult);
}
public static string GetRandomString(RandomStringType randomType, int stringLength,int seed)
{
string[] sCaptions = new string[] { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" };
string[] sNumbers = new string[] { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
Random rnd = new Random(seed);
string sResult = string.Empty;
for (int i = 0; i < stringLength; i++)
{
if (randomType == RandomStringType.OnlyNumber)
{
sResult += sNumbers[rnd.Next(0, 9)];
}
else if (randomType == RandomStringType.OnlyChar)
{
sResult += sCaptions[rnd.Next(0, 25)];
}
else if (randomType == RandomStringType.NumberAndChar)
{
sResult += sNumbers[rnd.Next(0, 9)] + sCaptions[rnd.Next(0, 25)];
sResult = sResult.Remove(rnd.Next(0, sResult.Length - 1), 1);
}
}
return sResult;
}
private static string RandomString(int size, RandomStringType type)
{
string chars;
switch (type)
{
case RandomStringType.Alpha:
chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
break;
case RandomStringType.Numeric:
chars = "0123456789";
break;
case RandomStringType.AlphaNumeric:
default:
chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
break;
}
char[] buffer = new char[size];
for (int i = 0; i < size; i++)
{
buffer[i] = chars[_rng.Next(chars.Length)];
}
return(new string(buffer));
}
public static string Random(int count, RandomStringType type = RandomStringType.Any)
{
if (count < 0)
{
throw new ArgumentOutOfRangeException(nameof(count));
}
if (count == 0)
{
return(string.Empty);
}
IList <Func <char> > types = __randomStringType.GetOrAdd(type, t =>
{
List <Func <char> > list = new List <Func <char> >();
if (t.FastHasFlag(RandomStringType.SmallLetters))
{
list.Add(RandomSmallLetter);
}
if (t.FastHasFlag(RandomStringType.CapitalLetters))
{
list.Add(RandomCapitalLetter);
}
if (t.FastHasFlag(RandomStringType.Numbers))
{
list.Add(RandomNumber);
}
if (!t.FastHasFlag(RandomStringType.SpecialCharacters))
{
return(list);
}
if (t.FastHasFlag(RandomStringType.SafeCharacters))
{
list.Add(RandomSafeSpecialCharacter);
}
else
{
list.Add(RandomSpecialCharacter);
}
return(list);
});
if (types.Count == 0)
{
throw new ArgumentOutOfRangeException(nameof(type));
}
StringBuilder sb = new StringBuilder(count);
for (int i = 0; i < count; i++)
{
sb.Append(types.PickRandom());
}
return(sb.ToString());
}
/// <summary>生成随机字符串
/// </summary>
public static string GetRandomStr(int length, RandomStringType randomStringType = RandomStringType.Number)
{
var rd = new Random(GetRandomSeed());
var sb = new StringBuilder();
var range = RandomRanges[randomStringType];
for (var i = 0; i < length; i++)
{
//生成随机的当前索引
var index = rd.Next(range.Item1, range.Item2);
sb.Append(RandomArray[index]);
}
return(sb.ToString());
}
public static string RandomString(RandomStringType type, int length)
{
string chars = "";
switch (type)
{
case RandomStringType.AlphaNumeric:
chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
break;
case RandomStringType.Numeric:
chars = "0123456789";
break;
case RandomStringType.Alpha:
chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
break;
}
return(new string(Enumerable.Repeat(chars, length)
.Select(s => s[random.Next(s.Length)]).ToArray()));
}
public static string NextString(this Random random, int minLength, int maxLength, RandomStringType type = RandomStringType.All)
{
var valueSpace = "";
if (type.HasFlag(RandomStringType.AlphaLower))
{
valueSpace += ALPHA;
}
if (type.HasFlag(RandomStringType.AlphaUpper))
{
valueSpace += ALPHA.ToUpper();
}
if (type.HasFlag(RandomStringType.Numeric))
{
valueSpace += NUMERIC;
}
var value = "";
var length = minLength == maxLength ? minLength : random.Next(minLength, maxLength);
for (var i = 0; i < length; i++)
{
var index = random.Next(valueSpace.Length);
value += valueSpace[index];
}
return(value);
}
public static string NextString(this Random random, int length, RandomStringType type = RandomStringType.All)
{
return(NextString(random, length, length, type));
}
