C # random string

 

Today, I sorted out the source code of a previous project and found two methods to randomly generate non-repeated strings. I think it is very convenient to use them. I will post them here for future reference. Method 1: generate a random string without repeated numbers 

PrivateIntRep= 0;

              ///
              /// Generate random numeric string
              ///
              /// Number of digits to be generated
              /// Generated numeric string
              Private String Generatecheckcodenum (Int Codecount)
              {
                      String Str = String. empty;
                      Long Num2 = Datetime. Now. ticks + This. REP;
                      This. Rep ++;
                      Random Random = New Random (((INT) (ulong) num2) & 0 xffffffffl )) | ((INT) (num2 > This. REP )));
                      For (Int I = 0; I < Codecount; I++)
                      {
                              Int Num = Random. Next ();
                              Str = Str + ((Char) (0x30 + ((Ushort) (Num % 10). tostring ();
                      }
                      Return STR;
              }

Code Method 2: generate a random string (mixed digits and letters)

 ///
       ///Generate random character strings (mixed numbers and letters)
       ///
       ///Number of digits to be generated
       ///Generated letter string
       PrivateStringGeneratecheckcode (IntCodecount)
       {
           StringStr=String. empty;
           LongNum2=Datetime. Now. ticks+This. REP;
           This. Rep ++;
           RandomRandom=NewRandom (((INT) (ulong) num2)&0 xffffffffl ))|((INT) (num2>This. REP )));
           For(IntI=0;I<Codecount;I++)
           {
               CharCh;
               IntNum=Random. Next ();
               If(Num%2)=0)
               {
                   Ch=(Char) (0x30+((Ushort) (Num%10 )));
               }
               Else
               {
                   Ch=(Char) (0x41+((Ushort) (Num%0x1a )));
               }
               Str=Str+Ch. tostring ();
           }
           ReturnSTR;
       }