c# - Grab user input from dynamic text box -

i have 2 buttons. 1 button creates textbox , submits information. i'm having trouble retrieving users texts once textbox has been created. here code:

 private void createtextbox(int j) //creates fields / cells     {               textbox t = new textbox();             t.id = "textbox" + j;             //t.text = "textbox" + j;             lsttextbox.add(t);             var c = new tablecell();             c.controls.add(t);             r.cells.add(c);             table1.rows.add(r);             session["test"] = lsttextbox;      } protected void button2_click(object sender, eventargs e)     {         string[] holder = new string[4];         (int = 0; < holder.length; i++)         {             holder[i] = "";         }         list<textbox> lsttextbox = (session["test"] list<textbox>);         if (lsttextbox.count < counter)         {             int = lsttextbox.count;             (int j = 0; j < i; j++)             {                  holder[j] = lsttextbox[j].text;              }             sqlconnection conns = new sqlconnection(configurationmanager.connectionstrings["testdbconnectionstring1"].connectionstring);             sqlcommand cmd = new sqlcommand("insert loanerform (field0, field1, field2, field3) values (@field0, @field1, @field2, @field3)", conns);             cmd.commandtype = commandtype.text;             cmd.parameters.addwithvalue("@field0", holder[0]);             cmd.parameters.addwithvalue("@field1", holder[1]);             cmd.parameters.addwithvalue("@field2", holder[2]);             cmd.parameters.addwithvalue("@field3", holder[3]);             conns.open();             cmd.executenonquery();             conns.close();          }          counter = 0;          button1.visible = true; //going submit data sql      } 

thank in advance!

here how create textboxes dynamically. keeps track of number of textboxes in viewstate.

<asp:button runat="server" id="button1" onclick="button1_click"   text="create textboxes" /> <asp:button runat="server" id="button2" onclick="button2_click"         text="save textboxes database" /> <asp:placeholder runat="server" id="placeholder1"></asp:placeholder>  public int counter {     { return convert.toint32(viewstate["counter"] ?? "0"); }     set { viewstate["counter"] = value; } }  protected void page_load(object sender, eventargs e) {     // need reload textboxes on page     // otherwise, becomes null     int total = counter;     (int = 0; < total; i++)     {         var textbox = new textbox         {             id = "textbox" + i,             text = "textbox" +         };         placeholder1.controls.add(textbox);     } }  private void createtextbox(int id) {     var textbox = new textbox     {         id = "textbox" + id,         text = "textbox" + id     };     placeholder1.controls.add(textbox); }  protected void button1_click(object sender, eventargs e) {     createtextbox(counter);     counter = counter + 1; }  protected void button2_click(object sender, eventargs e) {     int total = counter;     (int = 0; < total; i++)     {         var textbox = placeholder1.findcontrol("textbox" + i) textbox;         var text = textbox.text;         // text     } }