Web Forms :: Dynamically Assign Controls "checkbox"
Oct 25, 2010
What I have developed so far is a panel which allows a user to leave feedback for a page they are viewing. Now - my problem is how to control what will be displayed. What is preventing me moving forward is the fact that I need to re-use checkboxes (ids) in more than one instance. But the checkbox id will only exists once on the page depending on the users choice. An example of the above is as follows (which is based on choice). So if a user clicks:
1) "Yes" - A texbox and a submit button will appear.
2) "Yes, with the exception of..." - A group of predefined checkboxes, a texbox and a submit button will appear.
3) "No" - A group of predefined checkboxes, a texbox and a submit button will appear.
Now with option 2 and 3, they will re-use a few of the same checkboxes, but because I cannot assign the control with the same ID twice on the page (or can I?), this is where I need to introduce the dynamic assignment? Is this correct? Is my thought process on the above correct? If so, what will be the best way of doing this. Is there a demo or perhaps a tutorial on this out there? I've searched, but did not quite find the above setup.
Because I have never assigned controls dynamically, I am a little confused or should I say cautious that what I am trying to achieve in this frame of mind is even correct. Now that my database is setup, the page is capturing all the required information - the final step is getting all the feedback controls displayed correctly in the panel.
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<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="dsResults"
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Note: If a constant value is passed at design time it works fine. But i want to assign the value at runtime using Bind.
Environment details: VS 2008, ASP.NET 2.0 and .Net Framework 3.0 & C# language.
I tried returning values like 0s and 1s, Ys and Ns and True and False from a database field. But i still get the above mentioned error.
I tried retreving the value in OnRowDataBound event using Eval, since Bind is not available in code behind. But it would make the field readonly and i cannot edit and update the Results field.
Even though there is a value returned by the query why does the Checkbox does not assign the value using <%# Bind("Results") %> to Checked property instead throws error - Specified cast is invalid.
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