dynamic create text box value insert into database c#

Question

hi frnd  i have a problem:

 

 first i select drop down list value like 1  then create 2 text box 

i select drop down list value like 2 then create 4 text box  

 suppose select 1 then create 2 text box and in which insert  value like

first- director name 

second - Din 

 

 

if  i select 2 then create 4 text box but insert same:

 

 first row two text box - director name1 and mobile number1

 

Second row two text box -  director name2 and mobile number2 

 but insert single column like

 

foreach{ 

 

objadmin.director=txt.text;

 

objadmin.din=txt.text; 

 

 }