ASP.NET : What does the '#' starting a <% %> mean?

Question

我已经在 asp.net 中使用转发器控件有一段时间了..并且时不时地我总是忘记在 < %# DataBinder.Eval(Container.DataItem, "NAME"内添加 '#' )%>

所以我想知道这是什么意思？

Answer 1

这表明您是binding an expression正如您演示的 eval 或 bind 一样。

数据绑定(bind)语法

Data-binding expressions are contained within <%# and %> delimiters and use the Eval and Bind functions. The Eval function is used to define one-way (read-only) binding. The Bind function is used for two-way (updatable) binding. In addition to calling Eval and Bind methods to perform data binding in a data-binding expression, you can call any publicly scoped code within the <%# and %> delimiters to execute that code and return a value during page processing.