ASP. NET data binding (1)

ASP.. NET data binding must be activated once specified. You can use the DataBind method to activate it. Note that the DataBind method must be called in the Load event; otherwise, ASP.. NET will ignore the data binding expression and display it as a null value on the page

There are two types of data binding in ASP. NET: Single-value binding and multi-value binding.

 

What they have in common: they do not need to work with ADO. NET at the same time.

Differences: Single-value binding can dynamically insert a variable, attribute, or expression into a page to help create a data control template.

Multi-value binding can display the content used by a table. It must support its special control (including the DataSource attribute)

 

Single value binding:

There are four common expressions:

<% = XX %>, inline mode, can reference C # code

<% # XXX %>, referencing the code field in the. cs File

<% # $ Xxx %>, referencing pre-defined fields or registered classes in the web. config file

<% # Eval (xxx) %>. You need to bind the data source.

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