MessageBox with answer returns

[Shaitan00]

--Using [VS ASP.NET]--

 

This is a really simple question...

How do you make a message box that has a YES/NO and returns a boolean depending on the users response. Specifically I want to prompt the user to confirm if he wants to delete the seletected item. So like if (messagebox.response) then XXX else YYY type of Pseudo-code.

 

I am sure this is rather trivial just couldn't find any clear examples.

Thanks,

[kahlua001]

Use javascript in your page

 

<script language="javascript">

function confirm_delete()

{

if (confirm("Are you sure you want to delete this item?"))

return true;

else

return false;

}

</script>

 

On a control, add a javascript call, like...

 

onClick="return confirm_delete();"

[snarfblam]

<script language="javascript">

function confirm_delete()

{

if (confirm("Are you sure you want to delete this item?"))

return true;

else

return false;

}

</script>

[/Quote]

I'm not sure about this, but would the confirm() function itself not return a boolean? You are using it as the condition for an if statement. If for some reason you really want to throw it into a function, couldn't you just do

 

function confirm_delete() {

return (confirm("Are you sure you want to delete this item?"));

}

[kahlua001]

Yes, I was illustrating in detail.

[Mister E]

Here's a static function I use:

public static void AddConfirmDialog(System.Web.UI.WebControls.WebControl ctrl, string msg)
{
ctrl.Attributes.Remove("onClick");
ctrl.Attributes.Add("onClick","return confirm('" + msg + "');");
}

Just feed in a button or other WebControl and then specify your message. This will fire a JavaScript confirm dialog in a similar manner what was stated in the other posts.

[Rattlesnake]

Hi,

How could I add this messagebox for buttons in a datagrid. I have a datagrid that displays attachments. I want to have a confim message when someone clicks the delete button next to the attachment.

 

Thanks

[kahlua001]

Eitherin your itemcreated or itemdatabound event.

 

If e.item.itemtype = item or .... then

Dim btnDelete As Button = e.Item.FindControl("btnDelete")

btnDelete.Attributes.Add("onClick","return your_confirm_function();")

end if

[Rattlesnake]

Thanks. I have 2 more questions:

 

1. How can find what the user selected, Yes or NO

2. How will I find the row from which the button was clicked. In the datagrid I have the first colmn that uniquely identifies the record number.

 

Excuse my ignorance, but I am new to ASP.net.

 

Thanks

 

 

 

Eitherin your itemcreated or itemdatabound event.

 

If e.item.itemtype = item or .... then

Dim btnDelete As Button = e.Item.FindControl("btnDelete")

btnDelete.Attributes.Add("onClick","return your_confirm_function();")

end if

[kahlua001]

If the user clicked Yes, then the javascript will continue with the form post, if No, then the js will return back to the browser, in effect, nothing will happen after that. If your item delete event of your datagrid is fired, then you know the user has clicked Yes. To get the datakey of the datagrid item, use the index such as..

 

intID = Datagrid1.datakeys(e.item.itemindex)

[Rattlesnake]

Hi,

Thanks Kahlua001.

It seems to work, but with a small problem. It prompts me for the confirmation on alternate rows only (i.e I get the confirmation questions on the 1st ,3rd ,5th etc rows only), on other rows it deletes without confirmation.

It seems in the ItemCreated event it runs only on alternate rows. The Itemcreated event is as below

 

Private Sub dgAttachments_ItemCreated(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles dgAttachments.ItemCreated

If e.Item.ItemType = ListItemType.Item Then
           Dim btnDelete As ImageButton = e.Item.FindControl("btnDelete")
           btnDelete.Attributes.Add("onClick", "return confirm_delete();")
       End If

End Sub

 

Any reason why??

[mike55]

Check out the following site: http://www.metabuilders.com/

 

Has a message box similar to what you are looking for in the free downloads section

 

Mike55

[kahlua001]

Also check for alternatingitem

 

If e.Item.ItemType = ListItemType.Item or e.Item.ItemType = ListItemType.AlternatingItem then

 

End If