In the application I am working on, I have a task: open a new window from code behind code when the user clicks in the calendar.
This is a straightforward task and can be done with target="_blank" property of the link. But the calendar is server control, so if the user clicks on some date, there is a postback to server and page refreshed. Postbacks are not very good for user experience, and it was a lot of complaints in the previous version of the application because users can't use the back button and can't use the refresh button...
But I found an easy solution how to open a new window from code behind code and avoid problems with a postback.
Using update panel to open a new window from code-behind in asp.net
If I put the calendar in the update panel, I still can use server events, but it will be no page refresh for the user.
Source code: How to open a new window from the code-behind file
I use user control to wrap calendar code and put this control inside of UpdatePanel:
And this is code for opening new window:
UpdatePanel required ScriptManager, so do not forget to include it after the form tag.