Dynamic generation of controls in ASP.NET

Maxood · March 7th, 2004, 01:02 PM

I have managed to write a code that could generate textboxes on-the-fly.
The code is given below:
<script language="vb" runat="server">
Sub Page_Load()
Dim num as Integer
Dim counter as Integer

If Request.Form("select")<>"" Then
    num=Request.Form("select")
    Message.Text=""
    For counter = 1 To num
        Message.Text=Message.Text & _
        "<table><tr><td>Name</td><td><input type=text id=txtName></td></tr><tr><td>Email</td><td><input type=text name=txtEmail><td/></tr></table>"

    Next counter

End If
End Sub
</script>

<html>
    <head></head>
    <body>
        Enter the number of attendances
        <br/>
        <form runat="server">
        <asp:label id="Message" runat="server"/>
            <asp:DropDownList id="select" runat="server">
                <asp:listitem value=1/>
                <asp:listitem value=2/>
                <asp:listitem value=3/>
                <asp:listitem value=4/>
                <asp:listitem value=5/>
                <asp:listitem value=6/>
            </asp:DropDownList>
        </br>
        <input type="submit" value="Select" id="smt">
        </form>
    </body>
</html>

Could someone tell me how to get the data from these dynamically created texboxes.

  CEO InteliSoft

Maqsood ur Rahman

jacob · March 7th, 2004, 01:32 PM

Well, first of all you have to give them a unique ID, so that you can tell one from the other, e.g. use the counter to append the current ID.

Then you will be able to retrieve the values from a form just as you are used to!

By the way... You might consider doing the text boxes really dynamically; i.e. using the objects Table, HtmlInputText etc. and add the table to the form!

Hope it helps.

Jacob.

planoie · March 8th, 2004, 07:29 PM

Maxood,

Building dynamic controls the way you are doing it kind of defeats the purpose and power of ASP.NET. As Jacob suggested, you should use ASP.NET server controls. This way you have the power of those controls at your disposal. Otherwise, you are just scripting like you did in ASP. With the right coding you should never have to access the Request.Form() collection.

Peter
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