Why use page prerender

NET application. The scenario is that a new user is added to a group, and then the update is saved. The save logic has already been written inside the page prerender function. What I am trying to do is implement logic so that when an unauthorized person tries to add a new user, an error message is thrown and the page is redirected. This works fine, except the new user information is still saved even after I set the save boolean to false.

The page prerender checks the value of mblnSave and if it's true, then the data is saved. If it's false, then it's not saved. However, even if the user is unauthorized, the save is still allowed to occur. Why is the save logic in the prerender event? Why not have it in the click event?

I always make sure the user has access to add users on the page load event when they first come to a page. Well, that's what I was thinking, too. Any changes made to the state of the control in the prerender phase can be saved, while changes made in the rendering phase are lost. See Handling Inherited Events. Generally you use this event for page initialization, wrapping your code in a clause that causes it not to fire on postbacks, as postback logic usually lives in an event handler of a specific control.

Perform actions common to all requests, such as setting up a database query. At this point, server controls in the tree are created and initialized, the state is restored, and form controls reflect client-side data. Hi , Both are page events that fire on every page load.

Only the order in which they are fire. Any changes in the view state of the server control can be saved during this event. Such changes made in the rendering phase will not be saved. How to generate this event?.. In this event All the values of controls saves to Viewstate. After this event modification in page is not possible We can do final changes in this event before rendering this page. This because during the web form page life cycle there are other events in the page and in the user controls contained in the page What is Rending?

Before rendering , view state is saved for the page and all controls. During the rendering stage , the page calls the Render method for each control , providing a text writer that writes its output to the OutputStream object of the page 's Response property. Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid. Related Questions. Datagridview rowvalidating event does not trigger when user clicks on another row. Does event return anything in. Why MouseWheel event does not exist? Barcod scanning event in textbox. Event hover Jquery, does not work. Why does main process continues after external event is caught by signal hander? Layout: fixed fluid.

Web04 2. Strip HTML.