page updating problem

hi , how are you guys ?I hope you all fine ...

here

I went from  desktop application to web application , and now I have big problem with page  updates after every control events 


here am going to  explain the problem here with images 




I have (Html)  table  and (asp) button

The  photo





 when  I press the button the ADD GROUP place appear  , then I added group  name



and  here is the source code off the adding button

 grpname =  TextBox11.Text;
  body.Style["background-color"] =  "white";
  label11.Visible =  false;
  TextBox11.Visible =  false;
  Button33.Visible = false;
  Label[]  label = new  Label[1000];
  label[limit] = new Label();



  label[limit].Text =  grpname;
  label[limit].BackColor =  Color.Silver;
  label[limit].ForeColor =  Color.Green;
  label[limit].BorderStyle =  BorderStyle.Ridge;
  label[limit].Style["border-width"] =  "1px";
  label[limit].Style["border-color"] =  "blue";
  label[limit].Style["font-style"] =  "italic";
  label[limit].Style["text-align"] =  "center";
  label[limit].Style["width"] =  "200px";
  label[limit].Style["margin-top"] = margintop +  "px";
  label[limit].Style["margin-left"] = marginleft1 + "px";
  label[limit2] = new  Label();
  label[limit2].BackColor =  Color.DarkGoldenrod;
  label[limit2].ForeColor =  Color.Green;
  label[limit2].BorderStyle =  BorderStyle.Ridge;
  label[limit2].Style["border-width"] =  "1px";
  label[limit2].Style["border-color"] =  "blue";
  label[limit2].Style["font-style"] =  "italic";
  label[limit2].Style["text-align"] =  "center";
  label[limit2].Style["width"] =  "200px";
  label[limit2].Style["margin-top"] = margintop +  "px";
  label[limit2].Style["margin-left"] = marginleft2 +  "px";
  label[limit2].Text = "ssss";





  Controls.Add(label[limit]);
  Controls.Add(label[limit2]);
  TextBox11.Text =  "";
  margintop += 2;
  limit++;
  limit2 += 2;


and here is the  result




Every thing is good until now ... but when I try to do anything else clicking button or do any events ...  in asp controls ..






the  code is running again  , and the labels has gone in the PREVIEWS PAGE .. I  really don't know how to fix that ... in desktop application that should work  very well!..

I hope you guys can help me

thank you