Need to add TreeListCommandEventArgs in radbutton eventargs

Need to add TreeListCommandEventArgs in radbutton eventargs

By : arjen1984
Date : November 19 2020, 12:41 AM
should help you out
code :
protected void RadButton1_Click(object sender, EventArgs e)
    RadTreeList1.ItemCommand -= new EventHandler<TreeListCommandEventArgs>(RadTreeList1_ItemCommand);

    ContentPlaceHolder contentPage = this.Page.Master.FindControl("ContentPlaceHolder1") as ContentPlaceHolder;
    RadButton R = sender as RadButton;
    RadButton radbutton1 = R.Parent.FindControl("RadButton1") as RadButton;
    CommandEventArgs e2 = new CommandEventArgs(null, radbutton1.CommandArgument);
    TreeListCommandEventArgs e1 = new TreeListCommandEventArgs(null, radbutton1.CommandArgument, e2);
    TreeListDataItem dataItem = e1.Item as TreeListDataItem;
    Hashtable table = new Hashtable();
    table["RowId"] = (dataItem.FindControl("Label1") as Label).Text;
    table["Alias"] = (dataItem.FindControl("Label2") as Label).Text;

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Should an Event that has no arguments define its own custom EventArgs or simply use System.EventArgs instead?

Should an Event that has no arguments define its own custom EventArgs or simply use System.EventArgs instead?

By : George Kontitsis
Date : March 29 2020, 07:55 AM
this will help From Framework Design Guidelines by Brad Abrams and Krzysztof Cwalina:
Benefits of events using EventArgs/EventArgs<T> delegate types instead of…

Benefits of events using EventArgs/EventArgs<T> delegate types instead of…

By : mobeez
Date : March 29 2020, 07:55 AM
like below fixes the issue To me, the question is a little strange. What would be the benefit of doing this otherwise (defining delegate types that exactly match EventHandler for some TEventArgs)?
That said, there is at least one benefit I can think of to doing it the "normal" way: certain APIs already expect to deal with EventHandler delegates; for example, Rx Extensions includes a method that looks like this:
code :
    Action<EventHandler<TEventArgs>> addHandler,
    Action<EventHandler<TEventArgs>> removeHandler
How to close a RadWindow from a RadButton

How to close a RadWindow from a RadButton

By : Aphiwe Moshesh
Date : March 29 2020, 07:55 AM
wish of those help I am assuming that the technology you are talking is ASP.NET.
With that assumption i want to point you to this demo we have on our RadControls for ASP.NET Ajax control suite. This demo showcases the scenario you are looking out for. The rad window contains a button inside the window, which when clicked will close the rad window. here is the link to the demo:
Radbutton Onclick mozilla bug

Radbutton Onclick mozilla bug

By : Eze Fernandez
Date : March 29 2020, 07:55 AM
may help you . It appears that the form on your page is configured to use a GET request when submitted.
when we need to pass nullptr to an object^ or EventArgs ? and why to pass EventArgs::Empty to EventArgs^?

when we need to pass nullptr to an object^ or EventArgs ? and why to pass EventArgs::Empty to EventArgs^?

By : Vidhya Shanmugam
Date : March 29 2020, 07:55 AM
I hope this helps you . This will matter if and only if the event's subscriber(s) do something with those values and expect them to be non-null. Normally the sender is the object most "responsible" for the event (and indeed often, but not always, the object that the subscriber subscribed to). EventArgs by itself doesn't convey any interesting information, so it is entirely possible that the caller doesn't check it; but for more interesting events it would be common for the subscriber to access some information from the args - so if it was null this would often fail. EventArgs::Empty simply avoids the need to create a new but uninteresting EventArgs instance each time - since there is no information, all your events that use EventArgs might as well use the same instance.
You can send null for either sender or args; but don't be surprised if that stops some handlers from loving you. It would be preferable to send the logical sender and (in the presumed absence of anything more interesting), EventArgs::Empty.
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