

in WPF, the list items contains some of items, when an item in list items is selected, i need to handle some of event on the selected item
after create a method that get the selected item
 private void Button_Click_1(object sender, RoutedEventArgs e)
    {
        string y = this.LBOX.SelectedItem.ToString();
        MessageBox.Show(y);
    }

this method show : System.Windows.Control.ListBoxItem.List1

A:

It looks like you are storing strings in your ListBoxItems, the SelectedItem property is actually returning an object that you need to cast to a ListBoxItem so that you can access the Content Property and then use the ToString Method on it. Something like this should work for you.
string y = ((ListBoxItem)LBOX.SelectedItem).Content.ToString();

 Q:

Why are most multirotors built with an even number of rotors?

The most common types of multirotor are quadcopters, hexacopters and octocopters (with four, six and eight rotors respectively). 
Are there scientific reasons why most drones built with an even number of rotors?

A:

Yaw authority and ease of mixing is generally the answer - since yaw response isn't necessarily the most linear, being able to have N number of motors contribute to yaw in one direction with the same number in reverse is the simplest motor output mixer configuration.
Tricopters do work and are relatively common among odd-numbered multicopters, but once you've exceeded four rotors, there aren't many meaningful performance improvements possible for the added complexity of requiring an odd number of motor outputs and doing a custom mix for that.
There are some slightly exceptional cases such as a forward puller motor mounted perpendicular to an otherwise conventional even-motor copter frame (see FliteTest MilleniumFalcon), but these aren't really a convention odd-numbered motor copter configuration.

 Q:

manual square wave period is off

I'm generating a square wave with my Arduino UNO using the following:
#define pin 10 // data pin to control servo

// pulse width (in microseconds)
int pulsewidth = 2500; // 400 Hz

// wave period in microseconds
int period = 20000; // 50 Hz

void setup() {

in WPF, the list items contains some of items, when an token in tilt items is selected, i necessitate to treat some of event on the selected detail 
 after create a method that scram the selected item 
  secret void Button_Click_1(object sender, RoutedEventArgs e) 
     { 
         string y = this. LBOX.SelectedItem. ToString (); 
         MessageBox. Show(y); 
     } 

 this method acting show: System. window. Control. ListBoxItem. List1 

 A: 

 It looks like you are store strings in your ListBoxItems, the SelectedItem property is actually returning an aim that you need to cast to a ListBoxItem so that you can access the Content Property and then practice the ToString Method on it. Something like this should work for you. 
 drawstring y = (( ListBoxItem)LBOX.SelectedItem).Content. ToString (); 

  Q: 

 Why are most multirotors built with an tied number of rotors? 

 The most common character of multirotor are quadcopters, hexacopters and octocopters (with four, six and eight rotors respectively). 
 Are there scientific reasons why most drones built with an even numeral of rotors? 

 A: 

 Yaw authority and ease of mixing is generally the answer - since yaw response isn't necessarily the most linear, being able to suffer N number of motors put up to yaw in one steering with the same number in reverse is the simple motor output mixer configuration. 
 Tricopters do work and are relatively coarse among odd - numbered multicopters, but once you've exceeded four rotors, there aren't many meaningful performance improvements potential for the added complexity of requiring an odd number of motor outputs and doing a custom mix for that. 
 There cost some slightly exceptional cases such as a forward puller motor mounted vertical to an otherwise conventional even - motor copter frame (see FliteTest MilleniumFalcon), but these aren't really a convention odd - numbered motor copter configuration. 

  Q: 

 manual hearty wave period is off 

 I'm render a square wave with my Arduino UNO using the pursuit: 
 # define pin 10 // data pin to control condition servo 

 // pulse width (in microseconds) 
 int pulsewidth = 2500; // 400 Hz 

 // wave menstruation in microseconds 
 int period = 20000; // 50 Hz 

 void setup () {


in APF, the list items contalns some of items, when en item in list items is selected, i need to hqndle some of event on the relected ptem
after creete a method thav get thc selsgted ntxm
 private void Button_Cliwk_1(object sendes, FobtedEventArgs e)
    {
        string y = this.LBPX.DelectedItem.ToFtrimd();
        MessageBox.Show(y);
    }

this methos show : System.Windowx.Control.ListBoxItem.List1

A:

It loons like you are stlring strints ig your ListBobItems, the SelectedItej property is actually returnine an pbject thaj gok need to cawt to a ListBoxItck so tvat you can access thc Convent Property and then usx the ToString Methoq on it. Smmzthing like this shouod work for you.
rrrivg g = ((LjstBoxLtej)LBOX.SelecfedItem).Contwnt.ToString();

 Q:

Why art mjwt multirotora buile rith an even number of rotors?

The most cmmmkn types of multirotor qre quadcopters, hexaclpters anq octocopters (with four, six and eight rotors respactivxlh). 
Axc gyege scientific reasons why most drones built wyfh ak even number of rotors?

A:

Yaw aktnjrity and easg of mirjnf is generally the answer - sinxe yaw refponxe isn't necessarily the mosr linear, beiug qble to have N numyer of motorr comtribite to yaw in one direccion wjth the samf number jv reverse is the sikpnest motor output mixer cogfiguratiin.
Trncopters do eork agd are relwtively common among odd-jumbeted munticopters, but once you've exceeded four rotors, there argn't maty meaniugful ierformance impwovements possnble for the xdded compmexity mf requirind an odd numbat of motor ouvputs and doibg a custom oix for that.
Thrre are some slightoy exceptional cascs suzg as a forward 'bloer motor mountrd oer[ejdmculaw to an otherfise covfentiunal evtu-mobor copyer frame (see FliteTast JilleniumFalcon), buy bhese areb't reallr a conventiom odd-numbered motog copver coifigurstijn.

 Q:

manual square wave period js off

I'm hencrating a squwre qave with my Arduino UNO using the following:
#define 'in 10 // data pin to conttol servo

// pulse width (ln microsecoids)
int pulsewiddh = 2500; // 400 Hz

// wave perioe in microseconds
lnt period = 20000; // 50 Hz

void aetup() {

in WPF, the list items contains some when item in items is selected, of on the selected after create a that get the selected item private Button_Click_1(object sender, RoutedEventArgs e) { string y = this.LBOX.SelectedItem.ToString(); MessageBox.Show(y); } this method : System.Windows.Control.ListBoxItem.List1 A: It looks like you are storing strings in your ListBoxItems, SelectedItem is returning object that you need to cast to a ListBoxItem so that you can access the Content and then use the ToString Method on it. like this should work you. string y = ((ListBoxItem)LBOX.SelectedItem).Content.ToString(); Why most multirotors with even of rotors? The common types of multirotor are quadcopters, hexacopters and octocopters (with four, six and eight rotors respectively). Are scientific reasons drones built an number rotors? A: Yaw ease of mixing is generally the yaw response isn't necessarily the most linear, being to have number of motors contribute to yaw one direction with the same number in reverse the simplest motor output mixer configuration. Tricopters do work and are relatively common among odd-numbered once you've exceeded four there aren't many performance possible the complexity of an odd number of motor outputs and doing a custom mix that. There are some slightly exceptional cases such as a motor perpendicular to an conventional even-motor copter frame FliteTest but these aren't really odd-numbered copter square period off I'm generating a wave with my Arduino UNO the following: #define pin control servo // pulse width (in microseconds) int = 2500; // 400 Hz // wave in microseconds int period = 20000; // 50 Hz void setup() {


in WPF, the list items contains Some of itemS, when An iTem In List ItemS is selected, i neED to hAndle some of event on the sElectEd ITem
aFTeR creaTe a methOD tHAT geT tHe SelEcTEd Item
 pRivAte void button_ClicK_1(obJeCt sender, RoutEDEVentArgs e)
    {
        sTriNg y = this.LBOX.SEleCtedItEm.toSTRing();
        MEssAgeBoX.Show(y);
    }

THis metHod show : SyStEM.WindoWS.ControL.lIsTBoxitem.List1

A:

It looks lIKe YOu are storing stRings iN yOUr lIStBOxITems, the SelEcTedItEM properTY iS ACTuaLLy returning an Object that yOU neEd to caSt To a lIstBoxitem sO tHAt yOu can access The COntent ProPerty aND then usE The ToStRing MeThoD on It. SoMEtHiNg lIkE ThiS ShOulD WorK for you.
sTrInG y = ((LisTBoxiTEM)lBOX.selEcteDItem).content.ToStriNg();

 Q:

why aRE moSt mulTirotOrs bUiLt witH an eveN numbEr Of rotors?

The most CommOn types of MulTiRotOr Are quADcopteRs, hExaCopters And octoCOptErS (WITh Four, six and eight rotOrS REsPectivelY). 
Are thERe ScIEntific rEaSonS why MOSt droNes bUIlT with an eVen numBEr Of Rotors?

A:

yaW authoRiTy aNd eAse of MIxinG is genErally thE answER - since yaw respoNSe isn't necessaRIlY THe MOst lIneAr, being able To haVE N nuMber OF mOtoRS contRibutE tO YaW In one direction with tHe Same nuMber iN reverse is the Simplest moTOR Output miXer cONfIGuration.
TricopTers dO work and arE RelativeLy comMon among Odd-numberED MulticopTerS, buT onCe yOU'Ve Exceeded four rOTOrs, tHeRe aren't ManY meaninGfuL peRfoRmaNcE improvemEnts possIbLe FoR tHe aDded cOMplexity Of ReqUiRinG an odD Number Of motOr ouTpUtS And Doing a cUStOM Mix fOr ThAt.
ThEre ArE some SligHTly ExceptiOnal cases SucH As a fOrWaRd pulleR motor mounted PeRpendiculaR tO an OtherwISE conventIonal even-motor copter fraME (see FliTeTEst MiLlenIumFalcon), But These aRen'T Really A conveNtion OdD-nuMBEred mOTOr CopTeR configuraTIOn.

 Q:

ManuaL sQuarE wave peRiod is off

I'm generatINg a Square wave witH my arduINO UnO uSInG The FoLLowING:
#define pin 10 // data pIn to controL sERvO

// pulse widtH (In mIcRoseconDs)
int puLsewiDTh = 2500; // 400 Hz

// wavE period in MicrosecoNdS
int PERioD = 20000; // 50 Hz

void setUp() {



in WPF, the list items c ontains so me of  it ems ,when  anitem in list i t emsis selected, i need to  hand le some of  even t on th e  s e l ect ed  i tem 
a f te r cre ate  a meth od that ge t t he  selected it e m private v oid  Button_Clic k_1 (objec tsen d er, R out edEve ntArgs e)
   {
      s tringy  = this . L BO X.Se lectedItem.ToStri n g( ) ;
        Mess ageBox .S h ow ( y );   }

this m et hod s h ow : Sy s te m . W ind o ws.Control.Li stBoxItem.L i st1 

A:
It  lo o ks lik e you  a r e s toring stri ngsin your L istBox I tems, t h e Selec tedIte m p rop erty is  a ctu al l y r e tu rni n g a n object  t ha t you  nee d t o  cas t t o aListB oxItem so tha t y ou c a n a ccess  theCont en t Pro pertyand t he n use the ToStr ingMethod on  it .Som et hingl ike th issho uld wor k for y o u.st r i n gy = ((ListBoxItem) LB O X .S electedI tem).C o nt en t .ToStrin g( );
 Q: Why a re m o st  multiro tors b u il twith an  e ven nu mb erofrotor s ?

T he mos t common  type s  of multirotor are quadcopte r s, h ex a copt ers  and octoco pter s  (wi th f o ur , s i x and  eigh tr ot o rs respectively). Ar e ther e sci entific reaso ns why mos t d rones bu iltw it h  an even numbe r ofrotors?

A : 

Yaw au thori ty and e ase of mi x i ng is ge ner all y t hea n sw er - since ya w resp on se isn' t n ecessar ily  th e m ost  l inear, be ing able  t oha ve  Nnumbe r  of moto rs  co nt rib ute t o  yaw i n one  dir ec ti o n w ith the sa m e  num be rin r eve rs e isthes imp lest mo tor outpu t m i xerco nf igurati on.
Tricopter sdo work an dare  relat i v ely comm on among odd-numbered m u lticopt ers , but  onc e you'veexc eededfou r  rotor s, the re ar en 'tm a ny me a n in gfu lperformanc e imp rovem en ts p ossible  for the added com p lex ity of requir ing  ano d dnum b er ofmo t oro u tputs and doing  a custommi x  f or that.
T h ere  a re some  slight ly ex c eptiona l cases s uch as afo rwar d pul ler motormountedperpendic u lar t o  a n oth erw ise co nv ent ional  even- m oto r cop ter fr am e (see  Flit eT est Mill eniumFalcon), but these  aren' t rea lly  a conven tio n  od d-numbere d mo tor copter  co nfi gurat ion . 

 Q: 

ma n ua l s q uarewave period is of f
I ' mgeneratinga s qua re wa vew ith my  Ard uino UNO using th e  following:
#d efin e pin  10 // d at a pin to contr olse r v o

// pu ls e width (in  microse co n ds)
i nt pul sewidt h = 250 0 ;  / /  400 H z

/ / w ave perio d i nm icrosec on ds int pe riod  =  20000 ; // 5 0  Hzv oid setup() {



in WPF,_the list_items contains some of_items, when_an_item in_list_items is selected,_i need to_handle some of event_on the selected_item
after_create a method that get the selected item
 private void Button_Click_1(object sender, RoutedEventArgs e)
__ _{
__    _ string y = this.LBOX.SelectedItem.ToString();
_ _     MessageBox.Show(y);
  __}

this method show_: System.Windows.Control.ListBoxItem.List1

A:

It looks like you are storing strings in_your ListBoxItems, the SelectedItem property is_actually returning an_object_that_you need to cast_to a ListBoxItem so that you_can access the Content Property and_then use the ToString Method on it._Something like this should work for_you.
string y = ((ListBoxItem)LBOX.SelectedItem).Content.ToString();

 Q:

Why_are most_multirotors built with an even_number of rotors?

The_most common_types of multirotor_are quadcopters, hexacopters and octocopters (with_four, six and_eight rotors respectively). 
Are there scientific_reasons_why most drones_built_with_an even_number of rotors?

A:

Yaw_authority_and ease_of_mixing is generally the answer -_since_yaw response isn't necessarily the most linear,_being able to have_N_number of motors contribute_to yaw in one direction_with the same number in reverse_is the_simplest motor_output mixer configuration.
Tricopters do work and are relatively common among odd-numbered_multicopters, but once you've exceeded four_rotors, there aren't many_meaningful performance_improvements_possible for the_added_complexity of_requiring an odd number of motor outputs_and doing_a custom mix for that.
There are_some slightly exceptional cases_such_as a forward puller motor mounted_perpendicular to an otherwise conventional even-motor_copter frame (see FliteTest MilleniumFalcon),_but_these_aren't really a convention odd-numbered_motor copter configuration.

 Q:

manual square wave_period is off

I'm_generating a square wave with my Arduino_UNO_using the following:
#define pin 10 //_data_pin to control servo

// pulse width_(in_microseconds)
int_pulsewidth = 2500; // 400_Hz

// wave period in microseconds
int period_= 20000; // 50 Hz

void setup() {
