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POA tricky way to using <%# Bind %> in ASP.NET
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2012-01-10T22:34:07.363
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In ASP.NET, I can use <%# Bind %> to achieve two-way data binding, then the data source control can complete update function for me. However, I think it's only easy when you just show simple format, like <pre><code><%# Bind("InsertDate") %> </code></pre> But, if I want to show 'N/A' when InsertDate is not exist. then how to use <%# Bind %> to achieve the condition check? I know Bind function supports format string, like <pre><code><%# Bind("InsertDate", "0:{dd MMM yyyy}") %> </code></pre> But it cannot change format base on InsertDate's content. I even try to use: <pre><code><%# FormatString(Bind("InsertDate").ToString()) %> </code></pre> It seems's not working which normally works for Eval function. Another example is I have a bitwise column in table (like 5) which is represented by a checkboxlist wrapped by ListView control, like <pre><code> <asp:checkboxlist> <asp:ListItem value="1" text="OptionA"> <asp:ListItem value="2" text="OptionB"> <asp:ListItem value="4" text="OptionC"> </asp:checkboxlist> </code></pre> then how to use <%# Bind %> to achieve two-way bind to bind the bitwise column to this checkboxlist? Currently what I do is: <ol> <li>set checkboxlist's selected item(value) in ListView's ItemDataBound event handler</li> <li>using a HiddenField and bind the data to this hiddenfield to achieve two-way data bind. </li> <li>In LivtView's ItemUpdating event handler, I update above ListViewUpdateEventArgs' NewValue property to the value I want. and then the EntityDataSource can do the update operation correctly.</li> </ol> But I think this method is not easy and good. So is there any other better method to do this?
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<asp.net><listview><bind>
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A tricky way to using <%# Bind %> in ASP.NET
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1. USJeff Chen
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1. USJeff Chen
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1. CO`FormatString(Bind("InsertDate").ToStrig()` - you have a typo there, shouldn't it be `.ToString()`?
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 POA tricky way to using <%# Bind %> in ASP.NET
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 USjadarnel27

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