Ok time to show my complete lack of knowladge for all things web forms but here goes. I am extending the Panel control and OnPreRender sticking some additional controls inside of it (lets just say 1 textbox for simplicity). From here I am just letting the Panels Render method do its thing.
The issue I am having is that obviously every time this control is rerendered it is just sticks that same TextBox in the panel again with the value I am coding in the OnPreRender method. Now I dont actually want to repopulate the panel every time,
I want to stick the textbox contorl in there on first load and have them reloaded from the control/viewstate caches. In this case with my example of just sticking a single textbox in the panel, if the value of the textbox changes and a postback occurs I want that value to to remain the changed value.
Really basic webforms stuff I know, but I have never had to create custom controls in my time. ANy help appreciated.
Chris.
You need to (re)create the child control (the textbox) in OnInit – so that it’s there when LoadViewState and ProcessPostBackData is called.
See the server control lifecycle for more info.