Question: I am using FormView control, and I want to programmatically insert null value in OnItemInserting and OnItemUpdating event, by NewValues dictioanry in FormViewUpdateEventArgs parameter. But if I use

```
protected void FormView_ItemUpdating(object sender, FormViewUpdateEventArgs e)
{
    e.NewValues["EntityFrameworkEntityPropertyName"] = null;
}

```

such modification is ignored, database column is not updated and keeps its old value. EntityFramework entity property is: Type Int32, Nullable True, StoreGeneratedPattern None. 

If I bind TextBox control directly to property by Bind(), nulls are inserted well. Also if values are different from null, everything works fine.

How can I insert null value?

Answer: 
try this one...

> 
> Blockquote
> 
> 
> 

UILabel \*t1;

```
NSArray *arr1=[YourView subviews];
for (UIView *v in arr1)
{
    if([v isKindOfClass:[UILabel class]])
    {
        t1 = (UILabel *)v;
        if (t1.tag==your_tag)
            [t1 removeFromSuperview];
    }
}

```

> 
> Blockquote
> 
> 
>
All controls inherited from UIView.
So you can remove all the controls which added on UIView using like this. By clicking the button action write like this

```
for(UIView *control in [self.view subviews])
{
[control removeFromSuperview];
}

```