WinForms DateTimePicker在Linux Wine下设置Checked=false失效问题求助

这是Wine对WinForms DateTimePicker控件的兼容性bug，以下是几种可行的修复方案：

方案1：强制控件状态同步与重绘 #

Wine的控件渲染层可能未正确响应Checked属性变更，设置后手动触发控件更新：

private void buttonSetFalse_Click(object sender, EventArgs e)
{
    MessageBox.Show($"Before: {this.dateTimePicker1.Value} {this.dateTimePicker1.Checked}");
    
    dateTimePicker1.Checked = false;
    // 强制同步UI与状态
    dateTimePicker1.Update();
    dateTimePicker1.Refresh();
    
    MessageBox.Show($"After: {this.dateTimePicker1.Value} {this.dateTimePicker1.Checked}");
}

如果上述代码无效，可尝试先切换状态再设置，触发Wine内部的状态更新逻辑：

dateTimePicker1.Checked = true;
dateTimePicker1.Checked = false;
dateTimePicker1.Refresh();

方案2：直接调用Win32 API修改状态 #

WinForms的DateTimePicker封装了原生Win32控件，通过发送Win32消息可绕过Wine的.NET封装层问题：
首先导入必要的Win32 API定义：

using System.Runtime.InteropServices;

private const int DTM_FIRST = 0x1000;
private const int DTM_SETSYSTEMTIME = DTM_FIRST + 2;
private const int GDT_NONE = 0x0001;

[StructLayout(LayoutKind.Sequential)]
private struct SYSTEMTIME
{
    public ushort wYear;
    public ushort wMonth;
    public ushort wDayOfWeek;
    public ushort wDay;
    public ushort wHour;
    public ushort wMinute;
    public ushort wSecond;
    public ushort wMilliseconds;
}

[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, ref SYSTEMTIME lParam);

然后替换原来的Checked设置代码：

private void buttonSetFalse_Click(object sender, EventArgs e)
{
    MessageBox.Show($"Before: {this.dateTimePicker1.Value} {this.dateTimePicker1.Checked}");
    
    // 发送消息取消选中状态
    SYSTEMTIME st = new SYSTEMTIME();
    SendMessage(dateTimePicker1.Handle, DTM_SETSYSTEMTIME, (IntPtr)GDT_NONE, ref st);
    // 手动同步WinForms属性缓存
    dateTimePicker1.Checked = false;
    
    MessageBox.Show($"After: {this.dateTimePicker1.Value} {this.dateTimePicker1.Checked}");
}

方案3：使用自定义组合控件 #

如果前两种方案都无法解决问题，可用CheckBox和DateTimePicker组合实现相同功能，完全绕过原生控件的兼容性问题：

public class DateTimePickerWithCheck : Panel
{
    private readonly CheckBox _checkBox = new CheckBox();
    private readonly DateTimePicker _dateTimePicker = new DateTimePicker();

    public DateTimePickerWithCheck()
    {
        _checkBox.Text = string.Empty;
        _checkBox.Dock = DockStyle.Left;
        _checkBox.CheckedChanged += (s, e) =>
        {
            _dateTimePicker.Enabled = _checkBox.Checked;
            OnCheckedChanged(EventArgs.Empty);
        };

        _dateTimePicker.Dock = DockStyle.Fill;
        Controls.Add(_dateTimePicker);
        Controls.Add(_checkBox);
    }

    public bool Checked
    {
        get => _checkBox.Checked;
        set => _checkBox.Checked = value;
    }

    public DateTime Value
    {
        get => _dateTimePicker.Value;
        set => _dateTimePicker.Value = value;
    }

    // 暴露需要的DateTimePicker属性，例如Format、ShowUpDown等
    public DateTimePickerFormat Format
    {
        get => _dateTimePicker.Format;
        set => _dateTimePicker.Format = value;
    }

    public event EventHandler CheckedChanged;

    protected virtual void OnCheckedChanged(EventArgs e)
    {
        CheckedChanged?.Invoke(this, e);
    }
}

使用时直接替换原有的DateTimePicker即可，用法与原生控件一致。

内容的提问来源于stack exchange，提问作者egeo