ListView.DrawColumnHeader ListView.DrawColumnHeader ListView.DrawColumnHeader ListView.DrawColumnHeader Event

定义

当绘制 ListView 的详细信息视图并且 OwnerDraw 属性设置为 true 时发生。Occurs when the details view of a ListView is drawn and the OwnerDraw property is set to true.

public:
 event System::Windows::Forms::DrawListViewColumnHeaderEventHandler ^ DrawColumnHeader;
public event System.Windows.Forms.DrawListViewColumnHeaderEventHandler DrawColumnHeader;
member this.DrawColumnHeader : System.Windows.Forms.DrawListViewColumnHeaderEventHandler 
Public Custom Event DrawColumnHeader As DrawListViewColumnHeaderEventHandler 

示例

下面的代码示例提供了DrawColumnHeader事件处理程序的实现。The following code example provides an implementation of a DrawColumnHeader event handler. 有关完整示例, 包括DrawSubItem事件处理程序的实现, OwnerDraw请参阅参考主题。For the complete example, including the implementation of the DrawSubItem event handler, see the OwnerDraw reference topic.

// Draws column headers.
private void listView1_DrawColumnHeader(object sender,
    DrawListViewColumnHeaderEventArgs e)
{
    using (StringFormat sf = new StringFormat())
    {
        // Store the column text alignment, letting it default
        // to Left if it has not been set to Center or Right.
        switch (e.Header.TextAlign)
        {
            case HorizontalAlignment.Center:
                sf.Alignment = StringAlignment.Center;
                break;
            case HorizontalAlignment.Right:
                sf.Alignment = StringAlignment.Far;
                break;
        }

        // Draw the standard header background.
        e.DrawBackground();

        // Draw the header text.
        using (Font headerFont =
                    new Font("Helvetica", 10, FontStyle.Bold))
        {
            e.Graphics.DrawString(e.Header.Text, headerFont,
                Brushes.Black, e.Bounds, sf);
        }
    }
    return;
}
' Draws column headers.
Private Sub listView1_DrawColumnHeader(ByVal sender As Object, _
    ByVal e As DrawListViewColumnHeaderEventArgs) _
    Handles listView1.DrawColumnHeader

    Dim sf As New StringFormat()
    Try

        ' Store the column text alignment, letting it default
        ' to Left if it has not been set to Center or Right.
        Select Case e.Header.TextAlign
            Case HorizontalAlignment.Center
                sf.Alignment = StringAlignment.Center
            Case HorizontalAlignment.Right
                sf.Alignment = StringAlignment.Far
        End Select

        ' Draw the standard header background.
        e.DrawBackground()

        ' Draw the header text.
        Dim headerFont As New Font("Helvetica", 10, FontStyle.Bold)
        Try
            e.Graphics.DrawString(e.Header.Text, headerFont, _
                Brushes.Black, e.Bounds, sf)
        Finally
            headerFont.Dispose()
        End Try

    Finally
        sf.Dispose()
    End Try

End Sub

注解

此事件使你可以使用所有者描述自ListView定义控件的外观。This event lets you customize the appearance of a ListView control using owner drawing. 仅当OwnerDraw属性设置为true , 并且View属性设置为View.Details时, 才会引发此方法。It is raised only when the OwnerDraw property is set to true and the View property is set to View.Details. 对于控件中的每个列标题, 可能发生此事件。This event can occur for each column header in the control. 有关所有者描述的详细信息, 请参阅OwnerDraw属性参考主题。For more information on owner drawing, see the OwnerDraw property reference topic.

有关处理事件的详细信息, 请参阅处理和引发事件For more information about handling events, see Handling and Raising Events.

适用于

另请参阅