PropertyGrid控件 - 修改中心分割垂直线的位置

Question

我在WinForms中有一个PropertyGrid控件(http://msdn.microsoft.com/en-us/library/aa302326.aspx).现在我想将中间垂直线向左移动(它总是居中,但是我的键非常短,而值是Paths,它们很长.控件在默认情况下将线放在中间,尽管用户很多为了方便用户,我想以编程方式将行更多地移到左边.我现在已多次搜索WinForms设计器属性以及PropertyGrid控件的成员,但未找到该选项(也没有任何与之相关的事件).

隐私是通过隐私来隐藏吗？我只是监督它吗？(在这种情况下,我真诚地抱歉)或者我怎么能这样做呢？

Answer 1

是的,不幸的是,这需要一些基于反射的黑客才能实现.这是一个示例扩展类:

PropertyGridExtensionHacks.cs

using System.Reflection;
using System.Windows.Forms;

namespace PropertyGridExtensionHacks
{
    public static class PropertyGridExtensions
    {
        /// <summary>
        /// Gets the (private) PropertyGridView instance.
        /// </summary>
        /// <param name="propertyGrid">The property grid.</param>
        /// <returns>The PropertyGridView instance.</returns>
        private static object GetPropertyGridView(PropertyGrid propertyGrid)
        { 
            //private PropertyGridView GetPropertyGridView();
            //PropertyGridView is an internal class...
            MethodInfo methodInfo = typeof(PropertyGrid).GetMethod("GetPropertyGridView", BindingFlags.NonPublic | BindingFlags.Instance);
            return methodInfo.Invoke(propertyGrid, new object[] {});
        }

        /// <summary>
        /// Gets the width of the left column.
        /// </summary>
        /// <param name="propertyGrid">The property grid.</param>
        /// <returns>
        /// The width of the left column.
        /// </returns>
        public static int GetInternalLabelWidth(this PropertyGrid propertyGrid)
        {
            //System.Windows.Forms.PropertyGridInternal.PropertyGridView
            object gridView = GetPropertyGridView(propertyGrid);

            //protected int InternalLabelWidth
            PropertyInfo propInfo = gridView.GetType().GetProperty("InternalLabelWidth", BindingFlags.NonPublic | BindingFlags.Instance);
            return (int)propInfo.GetValue(gridView);
        }

        /// <summary>
        /// Moves the splitter to the supplied horizontal position.
        /// </summary>
        /// <param name="propertyGrid">The property grid.</param>
        /// <param name="xpos">The horizontal position.</param>
        public static void MoveSplitterTo(this PropertyGrid propertyGrid, int xpos)
        {
            //System.Windows.Forms.PropertyGridInternal.PropertyGridView
            object gridView = GetPropertyGridView(propertyGrid);

            //private void MoveSplitterTo(int xpos);
            MethodInfo methodInfo = gridView.GetType().GetMethod("MoveSplitterTo", BindingFlags.NonPublic | BindingFlags.Instance);
            methodInfo.Invoke(gridView, new object[] { xpos });
        }
    }
}

要移动拆分器位置,请使用MoveSplitterTo扩展方法.使用GetInternalLabelWidth扩展方法获取拆分器的实际位置.请注意,我观察到,在分配SelectedObject并且未显示PropertyGrid之前,GetInternalLabelWidth返回(-1).

样品用途:

using PropertyGridExtensionHacks;
//...

    private void buttonMoveSplitter_Click(object sender, EventArgs e)
    {
        int splitterPosition = this.propertyGrid1.GetInternalLabelWidth();
        this.propertyGrid1.MoveSplitterTo(splitterPosition + 10);
    }