Asp.net random display of retrieved data (original)

When you are playing Weibo every day, there is a "person you may know" on the Weibo broadcast content. Every time you refresh the page, the data there will change randomly, I will share with you today that I will write a general description of the random display of data called from the database.Algorithm, Mainly mark. Haha...

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Random random = New  Random (); datatable dt = New  Datatable (); stringbuilder sb = New  Stringbuilder ();  //  Int COUNT = DT. Rows. count;              Int Count = 20 ; //  Maximum number of index records              Int Times = 2 ; //  Record cycles              If (Count <= 6 ) //  Suppose I want to retrieve 6 data records.  {  For ( Int I =0 ; I <count; I ++ ) {Sb. append (  "" + I. tostring () + "  ,  " ); //  String to be spliced  }}  Else  {  String Strindex = "" ; // Used to compare non-repeated strings                  Int N = 0 ; //  Cyclic count                  Int Islast = 0 ; //  Last index value                  For ( Int I = 0 ; I <times; I ++) //  How to control the number of cycles {  Int Index = random. Next ( 0  , Count );  If (I = 0  ) {N ++ ; Strindex + = Index. tostring () + "  ,  "  ; Sb. append (index. tostring () + " ,  " ); //  String to be spliced Islast = Index ;}  Else  {  If (Islast! = Index ){  String [] Strlast = strindex. Split ( '  ,  ' );  Int M = 0  ;  For ( Int J = 0 ; J <strlast. Length- 1 ; J ++) //  Prevent duplication  {  If (Convert. toint16 (strlast [J]) =Index) {m ++ ;  Break  ;}}  If (M = 0  ) {N ++ ; Strindex + = Index. tostring () + "  ,  " ; Sb. append (index. tostring () + "  ,  " ); //  String to be spliced Islast = Index ;}}}  If (N = 5  ){  Break  ;} Times ++ ;}}  //  View results Clientscript. registerstartupscript ( Typeof (Page ), "" , "  Alert ('  " + Sb. tostring () + "  Times:  " + Times + "  ')  " ,True );

PS: Tandy tang I wish you a pleasant time writing your code!