Re: How to fire an event

Hi Dave,

It's my bad I did not provide enough details on the matter.
The ideea is: I have an Infragistic datagrid control, one of the columns is
a check box. One of the buttons is Check All, which will check all the check
boxes in the grid. Then the option is to either cancel the process and
uncheck them or go ahead and save the changes. For this there are 2 other
buttons, Save and Cancel. Under save I need to trigger the UpdateRowBatch
event. A collegue suggested that it does not trigger because the code is
doing the changes on the client side, which sincerely did not make much
sense to me.


"Dave Sexton" <dave@jwa[remove.this]online.com> wrote in message
news:uZmbQOVBHHA.3396@xxxxxxxxxxxxxxxxxxxxxxx
Hi Daniela,

If the code is C# then it's running on the server :)

The button click event is being raised upon a post-back to the server.
Since you're apparently iterating the rows in the click event handler
already I don't see why you desire the UpdateRowBatch event to be raised.
It seems like an arbitrary choice.

What exactly do you need from this event?

--
Dave Sexton

"Daniela Roman" <danielaroman@xxxxxxxxxx> wrote in message
news:e1ckaAUBHHA.4864@xxxxxxxxxxxxxxxxxxxxxxx
Hi Dave,
There is no script code, I have a check box column and I loop thru the
rows, marking them as checked, all done under a button click event in C#.
Is it client side or server side?
In my oppinion it is server side.

"Dave Sexton" <dave@jwa[remove.this]online.com> wrote in message
news:upQsLBIBHHA.4568@xxxxxxxxxxxxxxxxxxxxxxx
Hi Daniela,

It seems that changing values by code, which is done on client side
does not triger an event. I would need to force a postback. How can it
be done?

You should have mentioned that the "code" you spoke of was actually
script, running on the client. I never would have thought that
manipulating the grid in script would cause a server event to be raised.

You can force a post back by dynamically adding the ASP.NET javascript
postback method call to your own client script. This can be done by
calling the GetPostBackEventReference method (Page class in 1.* and
Page.ClientScript in 2.0) on the server to insert the callback into your
own script:

<script type="text/javascript">
function doingThings()
{
// do some things in javascript

// post back to raise the button's click event
<%= ClientScript.GetPostBackEventReference(gridControl, string.Empty)
%>
}
</script>

The problem here is that I have no idea whether the grid will raise the
UpdateRowBatch event on a post back. What action in particular raises
the UpdateRowBatch event? What argument needs to be supplied, if any?
You might want to read the grid's documentation and figure out what that
event is intended for before trying to raise it yourself.

The alternative to posting back for the grid control is to post back for
your button control (change "gridControl" to "myButton" in the
javascript above, for example) and perform the actions in code, on the
server, as I suggested in my previous response.

If you don't want to use a button then you can postback to the Page
(change "gridControl" to "this" or "Page" in the javascript above) and
implement IPostBackEventHandler.

Of course I can use the code under the event for the button click
event, but the other one would loop thru all the rows automatically.

If you can do so then it will be much easier (and safer) to iterate all
of the rows yourself when the button is pressed than it would be to try
to rig the event to be raised unnaturally.

Please realize that if what you are trying to accomplish has absolutely
nothing to do with the grid's UpdateRowBatch event then you shouldn't be
using the event at all.

--
Dave Sexton

"Daniela Roman" <danielaroman@xxxxxxxxxx> wrote in message
news:e73uiaHBHHA.4428@xxxxxxxxxxxxxxxxxxxxxxx
It seems that changing values by code, which is done on client side
does not triger an event. I would need to force a postback. How can it
be done?

Of course I can use the code under the event for the button click
event, but the other one would loop thru all the rows automatically.


"Dave Sexton" <dave@jwa[remove.this]online.com> wrote in message
news:uFOxT$5AHHA.4060@xxxxxxxxxxxxxxxxxxxxxxx
Hi Daniela,

... and in the mean time, you can possibly solve your problem by
placing the code from the event handler that isn't being called (which
you could call directly anyway) into another method as such:

void gd_UpdateRowBatch(object sender, EventArgs e)
{
CommonMethod();
}

void btn_Click(object sender, EventArgs e)
{
CommonMethod();
}

void CommonMethod()
{
// TODO: something in common
}

If the grid does things that require the event to actually be raised,
you might be able to emulate the effect yourself in the CommonMethod.

GL

--
Dave Sexton

"Daniela Roman" <danielaroman@xxxxxxxxxx> wrote in message
news:emku445AHHA.4568@xxxxxxxxxxxxxxxxxxxxxxx
Thanks. In fact I use a 3-rd party WEB grid control and for some
reason it does not fire the UpdateRowBatch event when I change the
values of the grid thru code. I need to raise that event thru other
means.
The sample I provided is not the best example.

Is there another way of firing an event externally?


"Dave Sexton" <dave@jwa[remove.this]online.com> wrote in message
news:eHN$8z5AHHA.4992@xxxxxxxxxxxxxxxxxxxxxxx
Hi Daniela,

I want to fire the grid's event but I don't know how to call the
event and provide the parameter list for it:

There are many events on the DataGrid control. You just have to
perform an action that will cause the grid to raise the desired
event. It's not common to raise Control events externally; Controls
raise their own events internally.

Are you trying to get the PageIndexChanged event to be raised from
your button click event handler?

If so, change the CurrentPageIndex property and the event should be
raised by the DataGrid.

--
Dave Sexton

"Daniela Roman" <danielaroman@xxxxxxxxxx> wrote in message
news:OOLr774AHHA.4592@xxxxxxxxxxxxxxxxxxxxxxx
Hello,

I try to fire an event under a button click event and maybe anybody
can give a clue please.

I have let's say a WEB grid with PageIndexChanged event:

private void DataGrid1_PageIndexChanged(object source,
System.Web.UI.WebControls.DataGridPageChangedEventArgs e)

{

// Set CurrentPageIndex to the page the user clicked.

DataGrid1.CurrentPageIndex = e.NewPageIndex;


// Rebind the data.

DataGrid1.DataBind();

}



Under a button click event:

private void btnUpdtCmd_Click(object sender, System.EventArgs e)

{

}



I want to fire the grid's event but I don't know how to call the
event and provide the parameter list for it:

(object source,
System.Web.UI.WebControls.DataGridPageChangedEventArgs e)



Thank you,

Daniela


















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