TIP: Auo Scroll ListView to bottom

[BryanZM]

Just a tip, I was perusing through dotnetforums looking for a way to scroll to the bottom of a list view automatically. I found this code to subclass the listview control to scroll to bottom:

 

------------------------------------------------------------------------

public class ScrollerListView : ListView

{

// values obtained from winusr.h

const int WM_SCROLL = 0x0115;

const IntPtr SB_BOTTOM = (IntPtr) 7;

 

public void AddItem( ListViewItem new_item )

{

// add the item to the items collection

Items.Add( new_item );

 

// have to Create a message

Message msg = Message.Create(

Handle, // the hwnd handle

WM_VSCROLL, // uMsg

SB_BOTTOM, // wParam

IntPtr.Zero ); // null as not sent by scrollbar

 

// call protected WndProc method

WndProc( ref msg );

}

}

 

-------------------------------------------------------------------------

However i found a way that may be better without subclassing. The listview control has a way built in to scroll to bottom. Here is a sample:

 

 

-------------------------------------------------------------------------

 

private FillListView(dt)

{

foreach(DataRow dr in dt)

{

//fill list view....

.............

............

}

 

 

int intCnt = 0 ;

intCnt = listView1.Items.Count -1 ;

// ensure that item count is greater than zero...

if(intCnt > 0)

{

// Getting item count and using it with the EnsureVisible

// method enures that the listview will always scroll to

// bottom.

listView1.Items[intCnt].EnsureVisible() ;

}

 

}

 

----------------------------------------------------------------------

 

I hope will help somebody out there.

 

BryanZM

[Volte]

ListBox1.TopIndex = ListBox1.Items.Count - 1