how find controls added dynamically in page

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I am adding different controls according to value stored in db. eg if the value is 1 i am adding textbox and if its 0 i am adding drpdwnlist.

my code is as below:

C#

cmd = new SqlCommand("Select label,control_name FROM search", connection);
        DataTable dt = new DataTable();
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        da.Fill(dt);
        var table = new Table();
      
        for (int x = 0; x < dt.Rows.Count; x++)
        {
            string contrl = dt.Rows[x]["control_name"].ToString();
                 if (contrl.Equals("1"))
            {
                var row = new TableRow();
                var cell = new TableCell();
                var cell1 = new TableCell();
                TextBox textbox = new TextBox();
                textbox.ID = "txt"+ x;
               
                textbox.Width = new Unit(180);

                cell.Controls.Add(textbox);
                row.Cells.Add(cell1);
                row.Cells.Add(cell);
                cell1.Text = lbl;

                if (dts.Rows[0][x].Equals("0"))
                    table.Rows.Add(row);
            }
            if (contrl.ToString().Equals("0"))
            {
                var row = new TableRow();
                var cell = new TableCell();
                var cell1 = new TableCell();
                DropDownList ddlPercent = new DropDownList();
                ddlPercent.AutoPostBack = true;
                ddlPercent.ID ="ddlPercent "+x;

                cell.Controls.Add(ddlPercent);
                row.Cells.Add(cell1);
                cell1.Text = lbl;
                row.Cells.Add(cell);
                table.Rows.Add(row);
            }

 container.Controls.AddAt(0, table);

i am using following code to find added controls but its not working n giving errer object reference is not set

C#

object wantedNode = this.FindName("txt"+x);
            if (wantedNode is TextBox)
            {
                
                TextBox wantedChild = wantedNode as TextBox;
                 a = wantedChild.Text;
                
            }

Please help me in this regard.

Thanks in advance

Posted 2-Jan-14 18:01pm

Member 10060795

Updated 2-Jan-14 18:20pm

Bojjaiah

v2

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Karthik_Mahalingam · Accepted Answer · 2014-01-02T18:37:00

Solution 1

Hi try adding your dynamic controls in Page_Init method, It will work...

C#

protected void Page_Init(object sender, EventArgs e)
       {
           TextBox txt = new TextBox () { ID="txt"};
           divContainer.Controls.Add(txt);
       }

C#

protected void Button1_Click(object sender, EventArgs e)
       {
          var text =  divContainer.FindControl("txt") as TextBox;
          text.Text = "modified";
       }

Posted 2-Jan-14 18:37pm

Karthik_Mahalingam

Comments

Member 10060795 3-Jan-14 2:38am

thanks but i have to add dyamic controls on selected_indexchng event.
can you please help in this regard.

Karthik_Mahalingam 3-Jan-14 4:15am

like the same, you have to add your dynamic controls in the pageinit method.
if have to use ispostback condition to check, when to add the controls..

Member 10060795 3-Jan-14 8:35am

thanks my problem is solved now

Karthik_Mahalingam 3-Jan-14 8:41am

welcome :)