asp.net,c#.net repeated fields

I have a asp.net webpage abc.aspx

it cont开发者_如何学Goains

        <td class="style1">
            <asp:TextBox ID="chqdt1" runat="server" Width="71px"></asp:TextBox>
            <a href="javascript:OpenCalFuture('ctl00_ContentPlaceHolder1_chqdt1');">
            <img border="0" height="16" src="cal.gif" width="16" /></a>
        </td>
        <td>
            <asp:Button ID="Button1" runat="server" Text="add" style="margin-left: 0px" />
        </td>
        <td>
            &nbsp;</td>

I want on each button click event create new row with new textbok with calender field created

handle button's OnClick event and put in handler code like that:

TextBox2 = New TextBox()
TextBox2.ID = "TextBox2"
TextBox2.Style("Width") = "71px"
Form1.Controls.Add(TextBox2)

http://support.microsoft.com/kb/317515

Here's quick answer:

1. First create a PlaceHolder for your textboxes.
2. Handle buttons OnClick event
3. Generate TextBox and Literal controls for your textbox and calendar field.
4. Add the generated controls to PlaceHolder.

Code sample:

<td class="style1">
    <asp:PlaceHolder ID="placeholder1" runat="server" />    
</td>
<td>
    <asp:Button OnClick="Button1_Click" ID="Button1" runat="server" Text="add" style="margin-left: 0px" />
</td>

Code Behind:

protected void Button1_Click(object sender, EventArgs e)
{
    TextBox textbox = new TextBox();
    textbox.ID = "myTextBoxID";

    Literal literalCal = new LiteralCalendar();
    literalCal.Text = 
        "<a href=\"javascript:OpenCalFuture('" + textbox.ClientID + "');\"><img border=\"0\" height=\"16\" src=\"cal.gif\" width=\"16\" /></a>";

    placeholder1.Controls.Add(textbox);
    placeholder1.Controls.Add(literalCal);
}

The sample above might not be a complete (or valid) code because I didn't test it, but I hope you get the idea.

You'd have to do what @Dima says but instead of the Forms1.Controls you should use a Placeholder control and write:

placeholder.Controls.Add(TextBox2)

Then you'd also do:

TextBox2.Focus();

to have the focus on that textbox.