PropertyGrid验证

Question

我有一台PropertyGrid。当我输入一个格式错误的值(例如，一个字符串进入一个整数项)时，我得到一条错误信息。如果我点击"OK"，坏值就会一直保留到我改变它为止。如果我点击“取消”，原始值又回来了。

我想要控制按钮，这样点击“确定”也会设置回原始值，而不是像取消按钮那样显示坏值。

我该怎么做呢？

Answer 1

简短的回答是:你不能。属性网格不支持修改它。

但是，如果您觉得心情不好，这里有一些示例代码演示了如何使用此对话框。当然，使用所有这些都要自负风险。

如何使用此实用程序类：

propertyGrid1.Site = new MySite(propertyGrid1);
propertyGrid1.SelectedObject = MyObj;

实用程序类代码：

public class MySite : ISite, IUIService
{
    public MySite(PropertyGrid propertyGrid)
    {
        PropertyGrid = propertyGrid;
    }

    public object GetService(Type serviceType)
    {
        if (serviceType == typeof(IUIService))
            return this;

        return null;
    }

    // this is part of IUIService
    public DialogResult ShowDialog(Form form)
    {
        // Check the form passed here is the error dialog box.
        // It's type name should be GridErrorDlg.
        // You can also scan all controls and for example
        // remove or modify some buttons...
        DialogResult result = form.ShowDialog(PropertyGrid);
        if (form.GetType().Name == "GridErrorDlg" && result == DialogResult.OK)
        {
            PropertyGrid.Refresh();
        }
        return result;
    }

    public PropertyGrid PropertyGrid { get; private set; }
    public bool DesignMode { get { return false; } }
    public IContainer Container { get { return null; } }
    public bool CanShowComponentEditor(object component) { return false; }

    // I've left the rest as not implemented, but make sure the whole thing works in your context...
    public IComponent Component
    {
        get { throw new NotImplementedException(); }
    }

    public string Name
    {
        get
        {
            throw new NotImplementedException();
        }
        set
        {
            throw new NotImplementedException();
        }
    }

    public IWin32Window GetDialogOwnerWindow()
    {
        throw new NotImplementedException();
    }

    public void SetUIDirty()
    {
        throw new NotImplementedException();
    }

    public bool ShowComponentEditor(object component, IWin32Window parent)
    {
        throw new NotImplementedException();
    }

    public void ShowError(Exception ex, string message)
    {
        throw new NotImplementedException();
    }

    public void ShowError(Exception ex)
    {
        throw new NotImplementedException();
    }

    public void ShowError(string message)
    {
        throw new NotImplementedException();
    }

    public DialogResult ShowMessage(string message, string caption, MessageBoxButtons buttons)
    {
        throw new NotImplementedException();
    }

    public void ShowMessage(string message, string caption)
    {
        throw new NotImplementedException();
    }

    public void ShowMessage(string message)
    {
        throw new NotImplementedException();
    }

    public bool ShowToolWindow(Guid toolWindow)
    {
        throw new NotImplementedException();
    }

    public System.Collections.IDictionary Styles
    {
        get { throw new NotImplementedException(); }
    }
}