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If dataitem is Null I want to show 0
<asp:Label ID="Label18" Text='<%# Eval("item") %>' runat="server"></asp:Label> How can I accomplish this?
822
The <%-- --%> Tags are used for specifying Server side comments in aspx page.
Summary. The new <%: %> syntax provides a concise way to automatically HTML encode content and then render it as output. It allows you to make your code a little less verbose, and to easily check/verify that you are always HTML encoding content throughout your site.
It means you're binding some data element.
<%$ %> is an ASP.NET Expression Builder. Used for runtime expression binding for control properties through the server tag attributes. Used with AppSettings , ConnectionStrings , or Resources (or your own custom extension, for example to use code-behind properties).
You can also create a public method on the page then call that from the code-in-front.
e.g. if using C#:
public string ProcessMyDataItem(object myValue) { if (myValue == null) { return "0 value"; } return myValue.ToString(); } Then the label in the code-in-front will be something like:
<asp:Label ID="Label18" Text='<%# ProcessMyDataItem(Eval("item")) %>' runat="server"></asp:Label> Sorry, haven't tested this code so can't guarantee I got the syntax of "<%# ProcessMyDataItem(Eval("item")) %>" entirely correct.
67
I'm using this for string values:
<%#(String.IsNullOrEmpty(Eval("Data").ToString()) ? "0" : Eval("Data"))%> You can also use following for nullable values:
<%#(Eval("Data") == null ? "0" : Eval("Data"))%> Also if you're using .net 4.5 and above I suggest you use strongly typed data binding:
<asp:Repeater runat="server" DataSourceID="odsUsers" ItemType="Entity.User"> <ItemTemplate> <%# Item.Title %> </ItemTemplate> </asp:Repeater> If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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