Hello,
I was wondering if it was possibly to bind a control to a dataset.haschanges
property.
The reason I want to do this is so that a little warning shows up on the
form saying that the record has not been saved.
Thank you heaps for anyones thoughts
John Sheppard
Well, not directly. HasChanges is a method not a property so while it seems
pedantic, it is the reason it won't work. If you really needed thsi
functionality, you could create a property that simply wrapped the call to
HasChanges and bind to it instead but it would need to be subclassed. (note,
I have not specifically done this but since you can bind to other
properites, I'm 99.9% sure you'd be fine if you created a property of your
own.)
"John"
news:fj60ok02jn0@news5.newsguy.com...
> Hello,
>
> I was wondering if it was possibly to bind a control to a
> dataset.haschanges property.
>
> The reason I want to do this is so that a little warning shows up on the
> form saying that the record has not been saved.
>
> Thank you heaps for anyones thoughts
> John Sheppard
>
John:
I just went ahead and did it...
For the whole "Untyped" thing, you can just deal with this class like you
would any other dataset and if you created a typed dataset you could do the
same:
namespace WindowsApplication2
{
public class AugmentedDataSet : DataSet
{
private Boolean hasChanged;
public Boolean HasChanged
{
get { return base.HasChanges(); }
set { hasChanged = value; }
}
}
}
Now here's the binding code:
"John"
news:fj60ok02jn0@news5.newsguy.com...
> Hello,
>
> I was wondering if it was possibly to bind a control to a
> dataset.haschanges property.
>
> The reason I want to do this is so that a little warning shows up on the
> form saying that the record has not been saved.
>
> Thank you heaps for anyones thoughts
> John Sheppard
>
Ooops, I think I forgot to send this
private void Form1_Load(object sender, EventArgs e)
{
AugmentedDataSet ds = new AugmentedDataSet();
ds.Tables.Add(new DataTable("WhateverTable"));
ds.Tables[0].Columns.Add(new DataColumn("MyColumn", typeof(String)));
chkHasChanges.DataBindings.Add("Checked", ds.HasChanged, null);
}
Coupled with my last post, this should do it for you
"John"
news:fj60ok02jn0@news5.newsguy.com...
> Hello,
>
> I was wondering if it was possibly to bind a control to a
> dataset.haschanges property.
>
> The reason I want to do this is so that a little warning shows up on the
> form saying that the record has not been saved.
>
> Thank you heaps for anyones thoughts
> John Sheppard
>