Question

I want to create 5 text boxes created on drop down selected index change and 4 text boxes created if dropdown index is 4. dropdown is inside asp.net updatepanel. There is a button as well inside update panel. When user will click that button, whatever is typed in textboxes, is shown on label.

Please suggest me solution.

Answer 1

May this work

    <div>

</div><asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:Panel ID="Panel1" runat="server">

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
 <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true" 
        onselectedindexchanged="DropDownList1_SelectedIndexChanged"><asp:ListItem Value="1">one </asp:ListItem><asp:ListItem Value="2">Two </asp:ListItem><asp:ListItem Value="3">Three </asp:ListItem><asp:ListItem Value="4">Four</asp:ListItem>
    </asp:DropDownList>
 <br />
   <asp:Button ID="Button2" runat="server" Text="fectchText" onclick="Button2_Click" />
    <br />

    <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
    <br />
    <br />
    <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
</ContentTemplate>

    protected void Page_Load(object sender, EventArgs e)
{
    if (Page.IsPostBack)
    {
        if (ViewState["mode"].ToString() == "1")
            createTextbox();
        ViewState.Add("mode", "1");
    }
    else
    {
        ViewState.Add("mode", "0");
    }
}

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
    createTextbox();
}

public void createTextbox()
{
    int noOftextbox = Convert.ToInt32(DropDownList1.SelectedItem.Value);
    for (int i = 0; i < noOftextbox; i++)
    {
        TextBox txtbox = new TextBox();
        txtbox.ID = "txt" + i;
        txtbox.Visible = true;
        txtbox.Height = 30;
        txtbox.Width = 100;
        UpdatePanel1.ContentTemplateContainer.Controls.Add(txtbox);
        PlaceHolder1.Controls.Add(txtbox);
     }
}

protected void Button2_Click(object sender, EventArgs e)
{
    int nocount=    Convert.ToInt32(DropDownList1.SelectedItem.Value);
    for (int count = 0; count <= nocount-1 ; count++)
    {
     TextBox txtRead = (TextBox)PlaceHolder1.FindControl("txt" + (count));
     Label1.Text += txtRead.Text+"-";
    }

}