c# generate random character code example
Example 1: c# random string
private static Random random = new Random();
public static string RandomString(int length)
{
const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
return new string(Enumerable.Repeat(chars, length)
.Select(s => s[random.Next(s.Length)]).ToArray());
}
Example 2: random character c#
Random rnd = new Random();
int ascii_index = rnd.Next(65, 91);
char myRandomUpperCase = Convert.ToChar(ascii_index);
Random rnd2 = new Random();
int ascii_index2 = rnd2.Next(97, 123);
char myRandomLowerCase = Convert.ToChar(ascii_index2);
int i = rnd.Next(1, 3) == 1 ? rnd.Next(65, 91) : rnd.Next(97, 123);
char anyLetter = Convert.ToChar(i);
Example 3: generate random alphanumeric string c#
Namespace: System.Web.Security
public string GeneratePassword()
{
return Membership.GeneratePassword(10,1);
}
Example 4: generate random string C#
private static Random random = new Random();
public static string RandomString(int length)
{
const string chars = "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789";
return new string(Enumerable.Repeat(chars, length)
.Select(s => s[random.Next(s.Length)]).ToArray());
}
public static string[] RandomStrings_Type1(int strLength, int arraySize)
{
const string chars = "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789";
string[] strArray = new string[arraySize];
for (int i = 0; i < strArray.Length; i++)
{
string randomString = new string(Enumerable.Repeat(chars, length)
.Select(s => s[random.Next(s.Length)]).ToArray());
strArray[i] = randomString;
}
return strArray;
}
public static List<string> RandomStrings_Type2(int strLength, int listSize)
{
return RandomStrings_Type1(strLength, listSize).ToList();
}