c# - How to get Text from Textbox created during runtime -


i have created winform app in user can set how many textboxes want (range 1-99) using code create textboxes during runtime

  (int = 0; < calculation.num; i++)    {        textbox txtrun = new textbox();        txtrun.name = "txtbox" + i;        txtrun.location = new system.drawing.point(35, 50 + (20 * i) * 2);        txtrun.size = new system.drawing.size(75, 25);        this.controls.add(txtrun);                    }

suppose user create 2 textboxes , enter data in each textbox , click calculate button want get textboxes data , divide 100

see picture want txtbox1 , txtbox2 data

enter image description here

edit 3:

this whole code

using system; using system.collections.generic; using system.componentmodel; using system.data; using system.drawing; using system.linq; using system.text; using system.threading.tasks; using system.windows.forms;  namespace gpa_calculatior__new_ {     public partial class form1 : form     {          int j = 0;          public form1()         {             initializecomponent();         }          private void form1_load(object sender, eventargs e)         {             //label + marks obtained textbox             (int = 0; < calculation.num; i++)             {                 label lblcount = new label();                 lblcount.name = "lblcount" + i;                 lblcount.location = new system.drawing.point(5, 55 + (20 * i) * 2);                 lblcount.size = new system.drawing.size(20, 30);                 lblcount.text = (i + 1).tostring();                 this.controls.add(lblcount);                  textbox txtrun = new textbox();                 txtrun.name = "txtbox" + i;                 txtrun.location = new system.drawing.point(35, 50 + (20 * i) * 2);                 txtrun.size = new system.drawing.size(75, 25);                 this.controls.add(txtrun);                 }              //creating textbox total marks             (j = 0; j < calculation.num; j++)             {                 textbox txtrun = new textbox();                 txtrun.name = "totaltxtbox" + j;                 txtrun.location = new system.drawing.point(160, 50 + (20 * j) * 2);                 txtrun.size = new system.drawing.size(50, 25);                 txtrun.text = "100";                 txtrun.enabled = false;                 this.controls.add(txtrun);             }             // creating 2 buttons (calculate , back)             (int k = 0; k < 2; k++)             {                 button btn = new button();                 btn.name = "btn" + k;                 btn.location = new system.drawing.point(20 + (k *110), 60 + (20 * j) * 2);                 btn.size = new system.drawing.size(90, 30);                  if (k == 0)                                    btn.text = "back";                  else                     btn.text = "calculate";                  btn.click += button_click;                  this.controls.add(btn);             }              //just giving free space in last              label lbl = new label();             lbl.name = "lbl" + j;             lbl.location = new system.drawing.point(30, 90 + (20 * j) * 2);             lbl.size = new system.drawing.size(90, 30);             lbl.text = "";              this.controls.add(lbl);             //**********************************************         }          //caculate , button function         private void button_click(object sender, eventargs e)         {             button btn = sender button;             if (btn.name.equals("btn1"))             {                 (int = 0; < calculation.num; i++)                 {                  }             }             else             {                 gpa_calculator mainform = new gpa_calculator();                 mainform.show();                 this.hide();             }          }             private void checkbox1_checkedchanged(object sender, eventargs e)         {             (j = 0; j < 10; j++)             {              }         }          private void form1_formclosed(object sender, formclosedeventargs e)         {             application.exit();         }      } } 

var sum = this.controls.oftype<textbox>()     .where(t => char.isdigit(t.name.reverse().take(1).firstordefault())         && t.enabled)     .select(t =>     {         double i;         if (!double.tryparse(t.text, out i)) { return 0d; }         return / 100d;     })     .sum();

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