随机字符串
class gloser
{
Random m_rnd = new Random();
public char getRandomChar()
{
int ret = m_rnd.Next(122);
while (ret < 48 || (ret > 57 && ret < 65) || (ret > 90 && ret < 97))
{
ret = m_rnd.Next(122);
}
return (char)ret;
}
public string getRandomString(int length)
{
StringBuilder sb = new StringBuilder(length);
for (int i = 0; i < length; i++)
{
sb.Append(getRandomChar());
}
return sb.ToString();
}
}
vb.net版
string str=GenerateRandom(6);//参数表示需要产生随机数的数目
Private Shared constant As Char() = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "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", "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"}
Public Shared Function GenerateRandom(ByVal Length As Integer) As String
Dim newRandom As System.Text.StringBuilder = New System.Text.StringBuilder(62)
Dim rd As Random = New Random
Dim i As Integer = 0
While i < Length
newRandom.Append(constant(rd.Next(62)))
System.Math.Min(System.Threading.Interlocked.Increment(i),i-1)
End While
Return newRandom.ToString
End Function
c#版Public Shared Function GenerateRandom(ByVal Length As Integer) As String
Dim newRandom As System.Text.StringBuilder = New System.Text.StringBuilder(62)
Dim rd As Random = New Random
Dim i As Integer = 0
While i < Length
newRandom.Append(constant(rd.Next(62)))
System.Math.Min(System.Threading.Interlocked.Increment(i),i-1)
End While
Return newRandom.ToString
End Function
private static char[] constant=
{
'0','1','2','3','4','5','6','7','8','9',
'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',
'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'
};
public static string GenerateRandom(int Length)
{
System.Text.StringBuilder newRandom = new System.Text.StringBuilder(62);
Random rd= new Random();
for(int i=0;i<Length;i++)
{
newRandom.Append(constant[rd.Next(62)]);
}
return newRandom.ToString();
}
调用{
'0','1','2','3','4','5','6','7','8','9',
'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',
'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'
};
public static string GenerateRandom(int Length)
{
System.Text.StringBuilder newRandom = new System.Text.StringBuilder(62);
Random rd= new Random();
for(int i=0;i<Length;i++)
{
newRandom.Append(constant[rd.Next(62)]);
}
return newRandom.ToString();
}
string str=GenerateRandom(6);//参数表示需要产生随机数的数目