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string.concat doubts

In the following code i need join another parameter in the details.aspx like:

details.aspx?id=xxx&ref=zzz

How can i do, with string.concat or another way (join 3 stings).

<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/images/info.jpg" 
onclick="ImageButton1_Click" PostBackUrl='<%# string.concat("~/details.aspx?id=", DataBinder.Eval(Container.DataItem, "id").tostring()) %>' />

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rflorencio
Asked:
rflorencio
2 Solutions
 
Pratima PharandeCommented:
<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/images/info.jpg"
onclick="ImageButton1_Click" PostBackUrl='<%# "~/details.aspx?id=" &  DataBinder.Eval(Container.DataItem, "id").tostring() &"&ref=" & DataBinder.Eval(Container.DataItem, "ref").tostring() %>' />
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TimCotteeCommented:
Hello rflorencio,

String.Concat is better than & as it is more efficient though with small strings this performance gain may not be noticeable. Another alternative is string.format:

 

Which effectively places the arguments (as many as you want) into the string in the appropriate places.


Regards,

TimCottee
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