c# visual studio how to pass value from subclass to parent class? -

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i'm new here, , new in c# programming in visual studio.

currently have assignment c# refactoring.

this original class

calculator.cs

using system; using system.collections.generic; using system.componentmodel; using system.data; using system.drawing; using system.linq; using system.text; using system.windows.forms;  namespace huang_kai_30077528_assign1 {     public partial class calculator : form     {           public calculator()         {             initializecomponent();         }          private void radiobutton1_checkedchanged(object sender, eventargs e)         {          }          private void caloriecalculation()         {             if (rbtnmale.checked)             {                 txtcalories.text = (66             + (6.3 * convert.todouble(txtweight.text))             + (12.9 * ((convert.todouble(txtfeet.text) * 12)             + convert.todouble(txtinches.text)))             - (6.8 * convert.todouble(txtage.text))).tostring();         }         else         {             txtcalories.text = (655             + (4.3 * convert.todouble(txtweight.text))             + (4.7 * ((convert.todouble(txtfeet.text) * 12)             + convert.todouble(txtinches.text)))             - (4.7 * convert.todouble(txtage.text))).tostring();         }     }      private void weightcalculation()     {         double malevariable = 50;         double femalevariable = 45.5;         double formula = (2.3 * (((convert.todouble(txtfeet.text) - 5) * 12) + convert.todouble(txtinches.text)));          if (rbtnmale.checked)         {             txtidealweight.text = ((malevariable + formula) * 2.2046).tostring();         }         else         {             txtidealweight.text = ((femalevariable + formula) * 2.2046).tostring();         }     }      private void txtfeetvalidation()     {         double feet;         if (!double.tryparse(txtfeet.text, out feet))         {             messagebox.show("feet must numeric value.");             txtfeet.select();             if (!(convert.todouble(txtfeet.text) >= 5))             {                 messagebox.show("height has equal or greater 5 feet!");                 txtfeet.select();                 return;             }         }     }      private void txtinchesvalidation()     {         double inches;         if (!double.tryparse(txtinches.text, out inches))         {             messagebox.show("inches must numeric value.");             txtinches.select();             return;         }     }      private void txtweightvalidation()     {         double weight;         if (!double.tryparse(txtweight.text, out weight))         {             messagebox.show("weight must numeric value.");             txtweight.select();             return;         }     }      private void txtagevalication()     {         double age;         if (!double.tryparse(txtage.text, out age))         {             messagebox.show("age must numeric value.");             txtage.select();             return;         }     }      private void btncalculate_click(object sender, eventargs e)     {         txtfeetvalidation();         txtinchesvalidation();         txtweightvalidation();         txtagevalication();          //clear old results                    txtidealweight.text = "";         txtcalories.text = "";         caloriecalculation();         weightcalculation();     }      private void label8_click(object sender, eventargs e)     {      }      private void btnexit_click(object sender, eventargs e)     {         application.exit();     }      private void form1_load(object sender, eventargs e)     {      }      private void btnaddpatient_click(object sender, eventargs e)     {         if (!string.isnullorempty(txtidealweight.text))         {             form secondform = new patientinfo(this);             secondform.show();          }         else         {             messagebox.show("please enter datas , click on 'add patient' add patient's records");         }       }      private void btnpatientlist_click(object sender, eventargs e)     {         form secondform = new patientlist(this);             secondform.show();     }      private void btnclear_click(object sender, eventargs e)     {         rbtnmale.checked = false;         rbtnfemale.checked = false;         txtfeet.text = "";         txtinches.text = "";         txtweight.text = "";         txtage.text = "";         txtcalories.text = "";             txtidealweight.text = "";          }          private void groupbox1_enter(object sender, eventargs e)         {          }     } }

the following classed parent class , sub-classes setup.

parent: calculator.cs

using system; using system.collections.generic; using system.componentmodel; using system.data; using system.drawing; using system.linq; using system.text; using system.windows.forms;  namespace huang_kai_30077528_assign1 {     public partial class calculator : form     {         //private string malecaloriescalculation();         //private string maleweightcalculation();         //private string femalecaloriescalculation();         //private string femaleweightcalculation();          public calculator()         {             initializecomponent();         }          private void rbtnmale_checkedchanged(object sender, eventargs e)         {          }          private void btncalculate_click(object sender, eventargs e)         {             //clear old results                        txtidealweight.text = "";             txtcalories.text = "";               /* validate user input: */             //validate height (feet) numeric value             double result;             if (!double.tryparse(txtfeet.text, out result))             {                 messagebox.show("feet must numeric value.");                 txtfeet.select();                 return;             }             //validate height (inches) numeric value             if (!double.tryparse(txtinches.text, out result))             {                 messagebox.show("inches must numeric value.");                 txtinches.select();                 return;             }             //validate weight numeric value             if (!double.tryparse(txtweight.text, out result))             {                 messagebox.show("weight must numeric value.");                 txtweight.select();                 return;             }             //validate age numeric value             if (!double.tryparse(txtage.text, out result))             {                 messagebox.show("age must numeric value.");                 txtage.select();                 return;             }              if (!(convert.todouble(txtfeet.text) >= 5))             {                 messagebox.show("height has equal or greater 5 feet!");                 txtfeet.select();                 return;             }              /*end validation*/             calculation();         }          private void calculation()         {             if (rbtnmale.checked)             {                 txtcalories.text = malecalculator.malecalories().tostring();                 //txtcalories.text = malecalculator.malecaloriescalculation();                 //txtidealweight.text = malecalculator.maleweightcalculation();             }             else             {                 txtcalories.text = femalecalculator.femalecaloriescalculation();                 txtidealweight.text = femalecalculator.femaleweightcalculation();             }         }         private void btnclear_click(object sender, eventargs e)         {             rbtnmale.checked = false;             rbtnfemale.checked = false;             txtfeet.text = "";             txtinches.text = "";             txtweight.text = "";             txtage.text = "";             txtcalories.text = "";             txtidealweight.text = "";          }     } }

subclass: malecalculation.cs

using system; using system.collections.generic; using system.linq; using system.text;  namespace huang_kai_30077528_assign1     {     class malecalculator: calculator     {         //private string malecaloriescalculation;         //private string maleweightcalculation;          public malecalculator malecalories()         {             (66 + (6.3 * convert.todouble(txtweight.text))             + (12.9 * ((convert.todouble(txtfeet.text) * 12)             + convert.todouble(txtinches.text)))             - (6.8 * convert.todouble(txtage.text))).tostring();              return malecalories();             //this.txtcalories.text = new malecalculator.malecalories;         }          public malecalculator maleweight()         {             ((50 + (2.3 * (((convert.todouble(txtfeet.text) - 5) * 12)             + convert.todouble(txtinches.text)))) * 2.2046).tostring();              return maleweight();         }     } }

subclass: femalecalculation.cs

using system; using system.collections.generic; using system.linq; using system.text;  namespace huang_kai_30077528_assign1 {     class femalecalculator : calculator     {         public double femalecaloriescalculation()         {             txtcalories.text = (655 + (4.3 * convert.todouble(txtweight.text))             + (4.7 * ((convert.todouble(txtfeet.text) * 12)             + convert.todouble(txtinches.text)))             - (4.7 * convert.todouble(txtage.text))).tostring();              return femalecaloriescalculation();         }          public double femaleweightcalculation()         {             txtidealweight.text = ((45.5 + (2.3 * (((convert.todouble(txtfeet.text) - 5) * 12)             + convert.todouble(txtinches.text)))) * 2.2046).tostring();              return femaleweightcalculation();         }     } }

as can see, these 2 sub-classes use calculation calories , ideal weight. plan take place of private void caloriecalculation() , private void weightcalculation() in original class calculator.cs.

the function need this:

when execute program , need calculate idealweight , calories, parent class calculator.cs result formula contain in sub-class, , tostring in text box. that's why there txtcalories , txtidealweight inside calculator.cs.

so question how results in sub-class, , fill in text boxes?

guys, please me important me!!

thank all!!

do mean virtual function? if so, 

class ancestor {     public virtual int dosomething()     {         // execute commands here.         // throw exception.         throw new notimplementedexception();     } }  class derived_a : ancestor {     public override int dosomething()     {         return 1 + 1;     } }  class derived_b : ancestor {     public override int dosomething()     {         return 1 + 2;     } }

this ancestry, virtual functions. more on this:

this type of code can done interfaces. see http://msdn.microsoft.com/en-us/library/vstudio/ms173156.aspx.


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