Linq groupby IdCordinator only if categery type count greater than one -

-

need group records idcordinator, conditions

  1. if category type not equal "s", include in group
  2. if category type "s" for particular coordinator , count greater than 1 include in group
  3. if category type "s" a particular coordinator , count equal 1 not include in group

how should frame clause. if have clause below, if there 1 element list though not of category "s" returns 0 records.

using system;

using system.collections.generic; using system.linq;

namespace linqgroupbywhere { class program { static void main( string[] args ) { studentlist studentlist = new studentlist(); studentlist.getlist(); console.readkey(); } }

public class studentlist {     public void getlist()     {          list<students> stdlst = new list<students>();         stdlst.add( new students( "stud1", 20, "m", "i001" ) );         stdlst.add( new students( "stud2", 20, "m", "i001" ) );         stdlst.add( new students( "stud3", 20, "m", "i002" ) );         stdlst.add( new students( "stud4", 20, "m", "i003" ) );         stdlst.add( new students( "stud5", 20, "s", "i001" ) );         stdlst.add( new students( "stud6", 20, "s", "i001" ) );         stdlst.add( new students( "stud7", 20, "s", "i002" ) );          var lst = stdlst.groupby( s => s.idcordinator )      .selectmany( sg =>             sg.where( s => !s.category.equals( "s" ) || sg.count( c => c.category.equals( "s" ) ) > 1 )            .select( student => student.name ) )            .orderby( o => o );          console.writeline( string.join( ",", (string[]) lst.toarray() ) );       } } public class students {      public students( string name, int age, string cat, string sicordinator )     {         this.name = name;         this.age = age;         this.category = cat;         this.idcordinator = idcordinator;     }     public string name     {         get;         set;     }     public int age     {         get;         set;     }     public string category     {         get;         set;     }     public string idcordinator     {         get;         set;     } }

}

you can write output want : 

var lst = stdlst.groupby(s => s.idcordinator)          .selectmany(sg =>                 sg.where(s => !s.category.equals("s") || sg.count(c => c.category.equals("s")) > 1)                .select(student => student.name))                .orderby(o => o);

hope solves problem.

update constructor : 

public students( string name, int age, string cat, string sicordinator ) {     this.name = name;     this.age = age;     this.category = cat;     this.idcordinator = sicordinator; // assiging same field here, making null }

Comments

Post a Comment

Popular posts from this blog

database - VFP Grid + SQL server 2008 - grid not showing correctly -

-
i having problem, have grid called "gridbasica" , this: thisform.gridbase.recordsource = "sgviemp" sgviemp cursor made executing select sqlserver command sqlexec. when want modify registry, go form , the update there. so, when come form grid, grid isnt grid anymore, big white rectangle. reading around said: delete recordsource , asingt again. thisform.gridbase.recordsource = "" *--i sqlexe here thisform.gridbase.recordsource = "sgviemp" i , works, but, when click button modify again cursos updated modify form doesnt load fields did first time. could me out that? thanks in advance. --------------- edit ------------------ i have been doing recommended: lnselect = select(0) n = sqlexec(thisform.conexion,"select emp_ccodigo codigo, emp_cnombre 'nombre o razon social', emp_cnumrif 'r.i.f' sgviempr","sgviemp1") set echo on suspend select sgviemp zap in sgviemp *-- browse *--zaps correct
Read more

jquery - Set jPicker field to empty value -

-
im using jpicker color selector in form. have clear value set window/icon 'no color selected' state. i've tried following: $(':input[name="color"]').val(''); //access value directly. (does not affect jpicker) 2: $.jpicker.list[0].color.active.val('hex', '', this); //set color black , input value 000000, instead of empty string 3: $.jpicker.list[0].color.active.val(null, '', this); //does nothing none of 3 methods seems behave properly. in advance. this works me :) $.jpicker.list[0].color.active.val('v', null); here example: http://jsfiddle.net/3up7n/
Read more

.htaccess - htaccess convert request to clean url and add slash at the end of the url -

-
ok , searched more 4 days , more 20 posts here in stach or in websites without kind of success first here htaccess file rewriteengine on rewriterule ^([a-za-z0-9_]+)/?$ index.php?page=$1 [nc] rewriterule ^([a-za-z0-9_]+)\/([a-za-z0-9_]+)\/?$ index.php?page=$1&action=$2 [nc] i tried many codes 1 worked me can call request , works me www.example.com/pagename => www.example.com/index.php?page=pagename here questions , please provide me information "in detail" understand code well 1- how convert request automatically www.example.com/index.php?page=pagename www.example.com/pagename 2- if tried add slash @ end shows me page without images or styling mean www.example.com/pagename => works www.example.com/pagename/ => doesn't work that's :) for first part need 301 rule this: rewritecond %{the_request} /index\.php\?page=([^\s&]+) [nc] rewriterule ^ /%1? [r=301,l] for second part use absolute path in css, js, images files r
Read more