How to dynamically change master page’s master page

asp.netmaster-pages

I am trying to change the master page dynamically, and although it's easy to do from a content page (overriding OnPreInit), there is no such event for a master page. Is it possible to introduce this event somehow?

UPDATE: I got halfway there by going via the PreInit of the pages at the bottom of the ladder, turns out you can do things like base.Master.MasterPageFile = "/master.Master";, but for some reason this doesn't load the stuff in the header of the top-most master page, namely stylesheets.

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Quoting from: Can I change a nested master page's master dynamically?

Just tested this and it works from the PreInit of the Page that is using the nested MasterPage. protected void Page_PreInit(object sender, EventArgs e)
{
this.Master.MasterPageFile = "/Site2.Master";
}

Obviously you will need to ensure that the ContentPlaceholderIds are consistent across the pages you are swapping between.

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Jquery – How to format a Microsoft JSON date

eval() is not necessary. This will work fine:

var date = new Date(parseInt(jsonDate.substr(6)));

The substr() function takes out the /Date( part, and the parseInt() function gets the integer and ignores the )/ at the end. The resulting number is passed into the Date constructor.

I have intentionally left out the radix (the 2nd argument to parseInt); see my comment below.

Also, I completely agree with Rory's comment: ISO-8601 dates are preferred over this old format - so this format generally shouldn't be used for new development.

For ISO-8601 formatted JSON dates, just pass the string into the Date constructor:

var date = new Date(jsonDate); //no ugly parsing needed; full timezone support

R – .Net Master Page Performance

Master pages are in a sense inverted user controls (they "surround" content as opposed to user control content that is pushed into the page). There isn't a rule of thumb that says use master pages lightly--a master page's performance cost is directly proportionate to how much code (HTML and otherwise) it causes to be pushed into the HTTP data stream.

For my money, I'd land on the side what makes for the most readable and maintainable code.

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