拒绝在PropertyGrid控件中使用拆分器

时间:2015-09-23 17:04:44

标签: c# winforms propertygrid splitter

有没有办法拒绝用户在PropertyGrid控件中使用Splitter。我浏览了PropertyGrid Control的所有属性,但我没有找到禁用它。是我遗失的任何东西。无论如何,以编程方式进行。 我正在使用C#Winforms VS2010。

由于

1 个答案:

答案 0 :(得分:3)

查看PropertyGrid控件的源代码:MSDN PropertyGrid

要防止水平分隔符行为,请覆盖OnMouseDown和OnMouseMove方法。要防止垂直分隔符行为,一种方法是使用IMessageFilter并在鼠标位置靠近分隔符位置时使用鼠标事件。

public class MyForm3 : Form, IMessageFilter {

    PropertyGrid pg = new MyPropertyGrid { Dock = DockStyle.Fill };
    Control gridView = null;
    MethodInfo miSplittlerInside = null;

    public MyForm3() {
        Controls.Add(pg);
        pg.SelectedObject = new Button { Text = "Bob" };

        var f = typeof(PropertyGrid).GetField("gridView", BindingFlags.Instance | BindingFlags.NonPublic);
        gridView = (Control) f.GetValue(pg);
        miSplittlerInside = gridView.GetType().GetMethod("SplitterInside", BindingFlags.Instance | BindingFlags.NonPublic);

        Application.AddMessageFilter(this);
    }

    private const int WM_MOUSEMOVE = 0x200;
    private const int WM_LBUTTONDOWN = 0x201;
    private const int WM_LBUTTONDBLCLK = 0x203;

    public bool PreFilterMessage(ref Message m) {
        if (m.HWnd == gridView.Handle) {
            if (m.Msg == WM_MOUSEMOVE || m.Msg == WM_LBUTTONDOWN || m.Msg == WM_LBUTTONDBLCLK) {
                Point pt = new Point(m.LParam.ToInt32());
                bool inside = (bool) miSplittlerInside.Invoke(gridView, new Object[] { pt.X, pt.Y });
                if (inside) {
                    return true;
                }
            }
        }
        return false;
    }

    class MyPropertyGrid : PropertyGrid {
        protected override void OnMouseMove(MouseEventArgs me) {
            //base.OnMouseMove(me);
            // do nothing, prevent user from moving the split bar
        }

        protected override void OnMouseDown(MouseEventArgs me) {
            //base.OnMouseDown(me);
        }
    }
}

注意:不调用基本方法会产生副作用,即不会触发这些事件的任何侦听器。

澄清:代码阻止了紫色分割器。你的问题是指橙色还是紫色?

enter image description here