ListView.ColumnWidthChanging Event
Definition
Important
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Occurs when the width of a column is changing.
public:
event System::Windows::Forms::ColumnWidthChangingEventHandler ^ ColumnWidthChanging;
public event System.Windows.Forms.ColumnWidthChangingEventHandler ColumnWidthChanging;
public event System.Windows.Forms.ColumnWidthChangingEventHandler? ColumnWidthChanging;
member this.ColumnWidthChanging : System.Windows.Forms.ColumnWidthChangingEventHandler
Public Custom Event ColumnWidthChanging As ColumnWidthChangingEventHandler
Event Type
Examples
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;
}
}
Private WithEvents listView1 As New ListView()
Private Sub 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")
Me.Controls.Add(listView1)
End Sub
' Handle the ColumnWidthChangingEvent.
Private Sub listView1_ColumnWidthChanging(ByVal sender As Object, _
ByVal e As ColumnWidthChangingEventArgs) _
Handles listView1.ColumnWidthChanging
' Check if the new width is too big or too small.
If e.NewWidth > 100 OrElse e.NewWidth < 5 Then
' 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
End If
End Sub
Remarks
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 Handling and Raising Events.