与标记后代码相比，在标记中声明数据源的区别？

Question

I have a legacy solution where all the DataSource s are defined in the markup for all .aspx-pages. The problem I have with this is that the DataSource get instantiated several times since it is used in page, control... What I want is to have NInject to handle the instantiation of the DataSource so this doesn't happen. I have got that part to sort of work, but when the DataSource is defined in the code-behind instead of in the markup the Page property is not set on the DataSource , does anyone know why?

A simple solution to this is to set the the Page property in a base class or something, but I do think that the property should be there and want to know why.

Answer 1

You have to call DataBind() after you set it.

WebControl1.DataSource = something;
WebControl1.DataBind();

Answer 2

It may has to do with the point in time of instantiation in the page lifecycle? Can you monitor (debug) the instantiation in the code behind? Which callback are you using in the code behind? If you are using the controls code behind, the Page property may not be set yet than. So choose a later callback - after the control has been added to some page already.