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copied!<p>Typically, a custom server control will implement the <code>SaveViewState</code>, <code>LoadViewState</code>, and <code>TrackViewState</code> methods to manage the state of controls.</p> <p>I don't know how you're control is built so I can't give you the exact code, but here's an example of those methods being used in a control that I created:</p> <pre><code>protected override void LoadViewState(object savedState) { if (savedState != null) { object[] state = (object[])savedState; if (state[0] != null) base.LoadViewState(state[0]); if (state[1] != null) ((IStateManager)ItemStyle).LoadViewState(state[1]); if (state[2] != null) ((IStateManager)headerStyle).LoadViewState(state[2]); if (state[3] != null) ((IStateManager)AlternatingItemStyle).LoadViewState(state[3]); } } protected override object SaveViewState() { object[] state = new object[4]; state[0] = base.SaveViewState(); state[1] = itemStyle != null ? ((IStateManager)itemStyle).SaveViewState() : null; state[2] = headerStyle != null ? ((IStateManager)headerStyle).SaveViewState() : null; state[3] = alternatingItemStyle != null ? ((IStateManager)alternatingItemStyle).SaveViewState() : null; return state; } protected override void TrackViewState() { base.TrackViewState(); if (itemStyle != null) ((IStateManager)itemStyle).TrackViewState(); if (headerStyle != null) ((IStateManager)headerStyle).TrackViewState(); if (alternatingItemStyle != null) ((IStateManager)alternatingItemStyle).TrackViewState(); } </code></pre> <p>Aside from the above methods, if you want to reload information from the <code>Request</code> object, you can implement the <code>IPostBackDataHandler</code> interface, which requires these two methods:</p> <pre><code>public virtual bool LoadPostData(string postDataKey, NameValueCollection postCollection) { string somePostedValue = postCollection["SomePostedValue"]; string anotherPostedValue = postCollection["AnotherPostedValue"]; } public virtual void RaisePostDataChangedEvent() { } </code></pre>

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