ListView.ColumnWidthChanging Event
Occurs when the width of a column is changing.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
This event allows you to check the new column width with the ColumnWidthChangingEventArgs.NewWidth property, and cancel the event if you choose by setting the Cancel property to true.
For more information about handling events, see Consuming Events.
The following code example demonstrates handling the ColumnWidthChanging event. It also demonstrates the ColumnWidthChangingEventArgs.NewWidth and Cancel members. To run this example, paste the code into a Windows Form. Call InitializeListView1 from the form's constructor or Load event handler.
ListView listView1 = new ListView();
private void InitializeListView1()
{
// Initialize a ListView in detail view and add some columns.
listView1.View = View.Details;
listView1.Width = 200;
listView1.Columns.Add("Column1");
listView1.Columns.Add("Column2");
// Associate a method with the ColumnWidthChangingEvent.
listView1.ColumnWidthChanging +=
new ColumnWidthChangingEventHandler(listView1_ColumnWidthChanging);
this.Controls.Add(listView1);
}
// Handle the ColumnWidthChangingEvent.
private void listView1_ColumnWidthChanging(object sender,
ColumnWidthChangingEventArgs e)
{
// Check if the new width is too big or too small.
if (e.NewWidth > 100 || e.NewWidth < 5)
{
// Cancel the event and inform the user if the new
// width does not meet the criteria.
MessageBox.Show("Column width is too large or too small");
e.Cancel = true;
}
}
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Here is how to enable full dragging of windows in Windows XP:
1. Go to Control Panel
2. Click on Display
3. On the "Display Properties" dialog go to "Appereance" tab
4. On the "Appearance" tab click on "Effects" button - this will open the "Effects" dialog.
5. On the "Effects" dialog see if the "Show windows contents while dragging" check box is checked. If the check box is not checked, then check it.
6. Close the "Effects" dialog and then the "Display Properties" dialog.
In Windows 7:
In Control Panel, click System.
On the left sidebar, click Advanced system settings.
In Performance section, click Settings.
In the box, check "Show window contents while dragging", and click OK.
Now full dragging of windows should be enabled on your machine and the ListView should fire the ColumnWidthChanging event.
- 8/12/2011
- Paul P Clement IV
- 8/12/2011
- Paul P Clement IV
