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Possible Duplicate:
ASP.NET “special” tags
What is the difference between <%# ... %>, <%= ... %> and <%$ ... %>?
I couldn’t find anything information about this. It’s impossible to find “<%=” using a search engine.
Do these tags have a name?
<%= ... %>is generally equivalent to Response.Write(…)it cannot be used in a control attribute that is runat=”server”
<%: ... %>(as of .NET v4.0) is an html encoded version of<%= %>(as @Eric mentions)<%# ... %>is used in data-binding context for Bind, Eval or Output (as @Ray mentions)<%$ ... %>is used in the context of a control attribute with runat=”server” (google “expression builder” also have a look at making a general purpose ‘Code’ expression builder. it is evaluated when the attribute/Parameter is required by the control.