Question

我有一个实现自定义ToolStripItem的类。在我尝试在设计时将项目添加到ContextMenuStrip之前，一切似乎都很有效。如果我尝试直接从ContextMenuStrip添加我的自定义控件，PropertyGrid会冻结，并且不会让我修改我的Checked或Text属性。但是如果我进入ContextMenuStrip PropertyGrid并通过Items(...)属性添加我的自定义控件，我可以在该对话框中修改自定义控件。如果它与底层代码有问题，我不确定我是否遗漏了某个属性。这是CustomToolStripItem类的副本。如你所见，它是一个非常简单的类。

[ToolStripItemDesignerAvailability(ToolStripItemDesignerAvailability.ContextMenuStrip)]
public class CustomToolStripItem : ToolStripControlHost {

    #region Public Properties

    [Description("Gets or sets a value indicating whether the object is in the checked state")]
    [ReadOnly(false)]
    public bool Checked { get { return checkBox.Checked; } set { checkBox.Checked = value; } }

    [Description("Gets or sets the object's text")]
    [ReadOnly(false)]
    public override string Text { get { return checkBox.Text; } set { checkBox.Text = value; } }

    #endregion Public Properties

    #region Public Events

    public event EventHandler CheckedChanged;

    #endregion Public Events

    #region Constructors

    public CustomToolStripItem()
        : base(new FlowLayoutPanel()) {
        // Setup the FlowLayoutPanel.
        controlPanel = (FlowLayoutPanel)base.Control;
        controlPanel.BackColor = Color.Transparent;

        // Add the child controls.
        checkBox.AutoSize = true;
        controlPanel.Controls.Add(checkBox);
    }

    #endregion Constructors

    #region Protected Methods

    protected override void OnSubscribeControlEvents(Control control) {
        base.OnSubscribeControlEvents(control);
        checkBox.CheckedChanged += new EventHandler(CheckChanged);
    }

    protected override void OnUnsubscribeControlEvents(Control control) {
        base.OnUnsubscribeControlEvents(control);
        checkBox.CheckedChanged -= new EventHandler(CheckChanged);
    }

    #endregion Protected Methods

    #region Private Methods

    private void CheckChanged(object sender, EventArgs e) {
        // Throw the CustomToolStripItem's CheckedChanged event
        EventHandler handler = CheckedChanged;
        if (handler != null) { handler(sender, e); }
    }

    #endregion Private Methods

    #region Private Fields

    private FlowLayoutPanel controlPanel;
    private CheckBox checkBox = new CheckBox();

    #endregion Private Fields

Answer 1

如果您不介意使用标准ToolStripMenuItem，它应该具有您创建的自定义控件的所有功能。它已经具有“Text”和“Checked”属性以及事件处理程序，加上所有正常的铃声和口哨声，尽管ToolStripMenuItem的“checked”查找与常规复选框不同。

自定义控件与PropertyGrid不一致

1 个答案: