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POWinforms DataBinding vs PropertyChanged Event Ordering Issue
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Id
8721581
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8721843
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1
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5
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CreationDate
2012-01-04T03:11:45.107
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2012-01-04T14:48:25.320
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2012-01-04T04:03:31.647
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Body
I'm sorry if this has been asked before, but I did try digging through the multitude of DataBinding questions available and couldn't find one that matched my problem. I'm doing a unidirectional databinding between a listbox index and some property on one of my entities, but I also need to run some additional logic after the databinding takes place. I tried doing it like this: <pre class="lang-cs prettyprint-override"><code>listBox.DataBindings.Add("SelectedIndex", entity, "Property", true, DataSourceUpdateMode.OnPropertyChanged); listBox.SelectedIndexChanged += (s,e) => view.Refresh(); </code></pre> The problem is that the event handler runs before the databinding updates, but <code>view.Refresh()</code> depends on the value of <code>entity.Property</code> being updated. This results in my view not being refreshed until the the next time I change my index. Is there any way to solve this with databinding? At the moment I've resorted to not using databinding whenever I have this scenario, and doing it manually instead: <pre class="lang-cs prettyprint-override"><code>listBox.SelectedIndex = entity.Property; listBox.SelectedIndexChanged += OnIndexChanged; private void OnIndexChanged(object sender, EventArgs e) { entity.Property = listBox.SelectedIndex; view.Refresh(); } </code></pre> But I'd prefer to avoid this since I'm using databinding for everything else and would like to keep consistency. <hr> Update I've found the solution. It looks like the Binding object itself holds BindingComplete event which is perfect for this. And since the DataBindings.Add method returns me the Binding object I can chain both together. My code therefore becomes: <pre class="lang-cs prettyprint-override"><code>listBox.DataBindings.Add("SelectedIndex", entity, "Property", true, DataSourceUpdateMode.OnPropertyChanged).BindingComplete += (s,e) => view.Refresh(); </code></pre> My only question now is if need to take care of unregistering this event manually, or if I can just call <code>listBox.DataBindings.Clear();</code> and be done with it.
Tags
<c#><winforms><events><data-binding>
Title
Winforms DataBinding vs PropertyChanged Event Ordering Issue
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1. USDavid Gouveia
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1. USDavid Gouveia
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