I'm trying to add a new textbox server control to my page from code-behind.
TextBox txt=new TextBox();
txt.Width=100;
txt.Height=100;
Page.Controls.Add(txt);
When I write following Code, this error is thrown:
"Control 'ctl02' of type 'TextBox' must be placed inside a form tag with runat=server. "
What's the reason this error is thrown? How should this be done?
Inside the form you could put a placeholder at the location you want this textbox to appear:
<form runat="server">
...
<asp:PlaceHolder ID="holder" runat="server" />
...
</form>
and then add the textbox to this placeholder:
TextBox txt = new TextBox();
txt.Width = 100;
txt.Height = 100;
holder.Controls.Add(txt);
The error message is telling you that your TextBox control must be added to the <form> element in the page instead of the page itself. Try:
Page.Form.Controls.Add(txt);
<form> element in an <asp:Table> element in your page's markup. It should work just fine.Table into the form (in the same way as the TextBox), but traditionally the <form> element is present in the page markup, not generated dynamically. If that's the case, then relocating the form inside a newly added table may work, but I never had to test it.