How can a ClientSideEvent can be attached to a Custom control?
We can add any ClientSideEvent like Onclick,OnBlur in the Render Method as, protected override void Render(HtmlTextWriter writer) { _button.Attributes.Add(‘OnClick’,’JavascriptClickFunction’); }
How can the output cache can be enabled?
Output Cache can be enabled by the following line <%@ OutputCache Duration=’60’%> This will make the page to be cached for 60 seconds.
How can I use Tracing in Custom Components?
In Custom Components, you can use tracing if you reference the System.Web namespace and use the HttpContext.Current object to get a reference to the current context. VB.NET C# Also make sure to set the following directives: For Page Level Tracing set Page Directive as For Application Level Tracing modify corresponding web.config as
What is being passed back and forth in the _ViewState form control?
The __VIEWSTATE hidden field is used to transfer the differences in controls from what is declared in the page — and the values they contain at the end of a request immediately prior to rendering. We can then use this information to re-construct the server controls to match that last rendered state during ‘postbacks’ to a page. The information within the __VIEWSTATE field is not really encrypted — although the values are definitely ‘cyptic’ to read (mainly because server controls try to store information in as compact a format as possible — and because our serializer performs some limited compression). You can see how much viewstate each control is saving by enabling tracing for the page. For example, by adding a trace attribute to the page directive: <%@ Page Language=’VB’ Trace=’True’ %> This will cause a table to be output at the bottom of the page. This won’t show the exact values stored in viewstate — but will give you a rough estimate of the size of each server control value. Note that you can disable the viewstate feature — either for the entire page or on specific server controls. This is done at the page level by setting the following page directive: <%@ Page Language=’VB’ MaintainState=’False’ %> or on an individual server control by setting a ‘maintainstate’ attribute: <asp:datagrid id=’MyGrid1′ maintainstate=’false’ runat=server/>
How can the layout of SideBar in Wizard Control in (ASP.NET 2.0) be changed?
The sidebar layout cannot be changed. But it can be hidden by setting DisplaySideBar property to False. <asp:Wizard ID=’Wizard1′ runat=’server’ ActiveStepIndex=’0′ BackColor=’#FFFBD6′ BorderColor=’#FFDFAD’ BorderWidth=’1px’ CellPadding=’5′ Font-Names=’Verdana’ Font-Size=’0.8em’ Width=’347px’ DisplaySideBar=’False’> </asp:Wizard>