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    <p>If you are dynamically adding controls at run time you have to make sure that those controls are populated to the page's Control collection before ViewState is loaded. This is so that the state of each checkbox can be rehydrated from Viewstate. The Page Load event, for example, is too late.</p> <p>Typically you would dynamically add your CheckBox controls during the Init Event (before view state is loaded) and then Read the values in your Checkbox controls during the Load event (after view state is loaded).</p> <p>eg:</p> <pre><code>protected override void OnInit(EventArgs e) { //load the controls before ViewState is loaded base.OnInit(e); for (int i = 0; i &lt; 3; i++) { CheckBox cb = new CheckBox(); cb = new CheckBox(); cb.ID = "KeyWord" + i.ToString(); cb.Text = "Key Word" MyPlaceHolder.Controls.Add(new CheckBox()); } } //this could also be a button click event perhaps? protected override void OnLoad(EventArgs e) { base.OnLoad(e); if (Page.IsPostBack) { //read the checkbox values foreach(CheckBox control in MyPlaceHolder.Controls) { bool isChecked = control.Checked; string keyword = control.Text; //do something with these two values } } } </code></pre> <p>Hope that helps</p> <p>****EDIT**** Forgot to mention that this is obviously just demo code - you would need to flesh it out.</p> <p>For more information on dynaic control rendering in ASP.Net check out <a href="http://aspnet.4guysfromrolla.com/articles/092904-1.aspx" rel="nofollow noreferrer">this article on 4Guys</a>.</p> <p>For more information on the page life-cycle in ASP.Net check out <a href="http://msdn.microsoft.com/en-us/library/ms178472(VS.100).aspx" rel="nofollow noreferrer">MSDN</a>.</p>
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    1. POHow and WHEN to save the values of the "Checked" attribute for Dynamic checkboxes
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    1. POHow and WHEN to save the values of the "Checked" attribute for Dynamic checkboxes
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    1. COThanks man. I began to understand your idea, but what is populated?
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      1. USAhmad Farid
    2. COAhmed, This code populates Checkbox controls into a PlaceHolder control - like your example does. This happens during the Page (or Control) Init method. I am just creating 3 - but you can create as many checkboxes as you like. You have to do this in the Page Init because otherwise Viewstate - will not be able to persist the CheckBox.Checked property over PostBack. Then when posting back in Page Load (after Viewstate has loaded) you can read the state of the checkboxes after a user has submitted the form (you probably have a button?).
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    3. COI have updated the code example to be a little clearer - hopefully it will make a little more sense.
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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