我只想更新ListViewItem的文本，而不会看到任何闪烁。

这是我的更新代码(多次调用)：

listView.BeginUpdate();
listViewItem.SubItems[0].Text = state.ToString();    // update the state
listViewItem.SubItems[1].Text = progress.ToString(); // update the progress
listView.EndUpdate();

我已经看到了一些解决方案，这些方案涉及重写组件的WndProc()：。

protected override void WndProc(ref Message m)
{
    if (m.Msg == (int)WM.WM_ERASEBKGND)
    {
        m.Msg = (int)IntPtr.Zero;
    }
    base.WndProc(ref m);
}

他们说这解决了问题，但就我而言，没有。我相信这是因为我在每个项目上都使用了图标。

解决方案

回答

如果我们只想更新文本，则只需直接设置更改后的SubItem的文本，而不是更新整个ListViewItem(我们尚未说明更新的方式)。

我们显示的覆盖等效于简单地覆盖OnPaintBackground，这将是一种"更正确"的托管方式来完成该任务，并且对单个项目无济于事。

如果我们仍然有问题，我们将需要澄清我们实际尝试过的操作。

回答

这是在黑暗中拍摄的照片，但是我们可以尝试对控件进行双重缓冲。

SetStyle(
  ControlStyles.AllPaintingInWmPaint |
  ControlStyles.UserPaint |
  ControlStyles.DoubleBuffer, true)

回答

CommonControls 6(XP或者更高版本)中的ListView支持双缓冲。幸运的是，.NET将最新的CommonControl包装在系统上。若要启用双重缓冲，请将适当的Windows消息发送到ListView控件。

详细信息如下：
http://www.codeproject.com/KB/list/listviewxp.aspx

回答

为了结束这个问题，在为表单中的每个ListView或者任何其他ListView的派生控件加载表单时，应该调用一个帮助程序类。感谢" Brian Gillespie"提供的解决方案。

public enum ListViewExtendedStyles
{
    /// <summary>
    /// LVS_EX_GRIDLINES
    /// </summary>
    GridLines = 0x00000001,
    /// <summary>
    /// LVS_EX_SUBITEMIMAGES
    /// </summary>
    SubItemImages = 0x00000002,
    /// <summary>
    /// LVS_EX_CHECKBOXES
    /// </summary>
    CheckBoxes = 0x00000004,
    /// <summary>
    /// LVS_EX_TRACKSELECT
    /// </summary>
    TrackSelect = 0x00000008,
    /// <summary>
    /// LVS_EX_HEADERDRAGDROP
    /// </summary>
    HeaderDragDrop = 0x00000010,
    /// <summary>
    /// LVS_EX_FULLROWSELECT
    /// </summary>
    FullRowSelect = 0x00000020,
    /// <summary>
    /// LVS_EX_ONECLICKACTIVATE
    /// </summary>
    OneClickActivate = 0x00000040,
    /// <summary>
    /// LVS_EX_TWOCLICKACTIVATE
    /// </summary>
    TwoClickActivate = 0x00000080,
    /// <summary>
    /// LVS_EX_FLATSB
    /// </summary>
    FlatsB = 0x00000100,
    /// <summary>
    /// LVS_EX_REGIONAL
    /// </summary>
    Regional = 0x00000200,
    /// <summary>
    /// LVS_EX_INFOTIP
    /// </summary>
    InfoTip = 0x00000400,
    /// <summary>
    /// LVS_EX_UNDERLINEHOT
    /// </summary>
    UnderlineHot = 0x00000800,
    /// <summary>
    /// LVS_EX_UNDERLINECOLD
    /// </summary>
    UnderlineCold = 0x00001000,
    /// <summary>
    /// LVS_EX_MULTIWORKAREAS
    /// </summary>
    MultilWorkAreas = 0x00002000,
    /// <summary>
    /// LVS_EX_LABELTIP
    /// </summary>
    LabelTip = 0x00004000,
    /// <summary>
    /// LVS_EX_BORDERSELECT
    /// </summary>
    BorderSelect = 0x00008000,
    /// <summary>
    /// LVS_EX_DOUBLEBUFFER
    /// </summary>
    DoubleBuffer = 0x00010000,
    /// <summary>
    /// LVS_EX_HIDELABELS
    /// </summary>
    HideLabels = 0x00020000,
    /// <summary>
    /// LVS_EX_SINGLEROW
    /// </summary>
    SingleRow = 0x00040000,
    /// <summary>
    /// LVS_EX_SNAPTOGRID
    /// </summary>
    SnapToGrid = 0x00080000,
    /// <summary>
    /// LVS_EX_SIMPLESELECT
    /// </summary>
    SimpleSelect = 0x00100000
}

public enum ListViewMessages
{
    First = 0x1000,
    SetExtendedStyle = (First + 54),
    GetExtendedStyle = (First + 55),
}

/// <summary>
/// Contains helper methods to change extended styles on ListView, including enabling double buffering.
/// Based on Giovanni Montrone's article on <see cref="http://www.codeproject.com/KB/list/listviewxp.aspx"/>
/// </summary>
public class ListViewHelper
{
    private ListViewHelper()
    {
    }

    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    private static extern int SendMessage(IntPtr handle, int messg, int wparam, int lparam);

    public static void SetExtendedStyle(Control control, ListViewExtendedStyles exStyle)
    {
        ListViewExtendedStyles styles;
        styles = (ListViewExtendedStyles)SendMessage(control.Handle, (int)ListViewMessages.GetExtendedStyle, 0, 0);
        styles |= exStyle;
        SendMessage(control.Handle, (int)ListViewMessages.SetExtendedStyle, 0, (int)styles);
    }

    public static void EnableDoubleBuffer(Control control)
    {
        ListViewExtendedStyles styles;
        // read current style
        styles = (ListViewExtendedStyles)SendMessage(control.Handle, (int)ListViewMessages.GetExtendedStyle, 0, 0);
        // enable double buffer and border select
        styles |= ListViewExtendedStyles.DoubleBuffer | ListViewExtendedStyles.BorderSelect;
        // write new style
        SendMessage(control.Handle, (int)ListViewMessages.SetExtendedStyle, 0, (int)styles);
    }
    public static void DisableDoubleBuffer(Control control)
    {
        ListViewExtendedStyles styles;
        // read current style
        styles = (ListViewExtendedStyles)SendMessage(control.Handle, (int)ListViewMessages.GetExtendedStyle, 0, 0);
        // disable double buffer and border select
        styles -= styles & ListViewExtendedStyles.DoubleBuffer;
        styles -= styles & ListViewExtendedStyles.BorderSelect;
        // write new style
        SendMessage(control.Handle, (int)ListViewMessages.SetExtendedStyle, 0, (int)styles);
    }
}

回答

在.NET Winforms 2.0中，存在一个称为DoubleBuffered的受保护属性。

通过从ListView继承，可以将此受保护的属性设置为true。这将启用双重缓冲，而无需调用SendMessage。

设置DoubleBuffered属性与设置以下样式相同：

listview.SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint, true);

http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=94096