Question

我坚持以下事情。我想从另一个Form（ColorForm）更改面板颜色。有可能吗？

来自MainForm的代码：

public void upperpanel_Paint(object sender, PaintEventArgs e)
        {

        }

我不知道如何在我的ColorForm中访问该upperpanel_Paint 我正在从SettingsForm打开ColorForm

Mainform＆gt; SettingsForm＆gt; ColorForm

public partial class SettingsForm : Form
{

    public static event ColourSettingChangedDelegate ColourSettingsChangedEvent;
    public delegate void ColourSettingChangedDelegate(Color color);


    List<string> adreses;

    List<string> bookmarki;

    void SelectColour()
    {
        using (ColorForm colourForm = new ColorForm())
        {


            if (colourForm.ShowDialog() == DialogResult.OK)
            {
                //Update colour setting and fire event
                OnColourSettingsChanged(colourForm.SelectedColor);
            }
        }
    }



    public SettingsForm(List<string> adr, List<string> s)
    {

        InitializeComponent();
        adreses = adr;
        bookmarki = s;


    }




    private void Historyb_Click(object sender, EventArgs e)
    {
        foreach (Form form in Application.OpenForms)
        {


            if (form.GetType() == typeof(HistoryForm))
            {
                form.Activate();
                return;
            }
        }

        HistoryForm hf1 = new HistoryForm(adreses);

        hf1.Show();
    }

    private void Bookmarksb_Click(object sender, EventArgs e)
    {
        BookmarksForm booklist = new BookmarksForm();
        booklist.SetAllBookmarks(bookmarki);
        booklist.ShowDialog();
    }

    private void Colorb_Click(object sender, EventArgs e)
    {

        SelectColour();

    }





    private void OnColourSettingsChanged(Color color)
    {
        if (ColourSettingsChangedEvent != null)
            ColourSettingsChangedEvent(color);
    }


}

ColorForm的代码：

 public partial class ColorForm : Form
{

    public ColorForm()
    {
        InitializeComponent();

    }



    private void Panelcolor_Click(object sender, EventArgs e)
    {
        ColorDialog colorDlg = new ColorDialog();
        colorDlg.AllowFullOpen = true;
        colorDlg.AnyColor = true;

        if (colorDlg.ShowDialog() == DialogResult.OK)
        {

            upperpanel.BackColor = colorDlg.Color;


        }
    }
}

谢谢！

Answer 1

也许最好在设置更改或特定表单颜色设置更改时触发全局事件，并在需要采取操作的表单上侦听该事件。

例如，请参阅此伪代码：

ColourForm：

仅用于挑选颜色的表单，并将结果存储在属性中。

class ColourForm
{
   public Color SelectedColor {get;set;}

    private void Panelcolor_Click(object sender, EventArgs e)
    {
        ColorDialog colorDlg = new ColorDialog();
        colorDlg.AllowFullOpen = true;
        colorDlg.AnyColor = true;

        if (colorDlg.ShowDialog() == DialogResult.OK)
        {

            this.SelectedColor = colorDlg.Color;


        }
    }

   void Cancel()
   {
       this.DialogResult = DialogResult.Cancel;
       this.Close();
   }

   void Save()
   {
       this.DialogResult = DialogResult.OK;
       this.Close();
   } 
}

SettingsForm：

更新设置的主要表单，如果颜色表单的对话结果为'ok'结果，则会创建颜色选择器表单并保存设置并触发事件。

class SettingsForm
{

   public static event ColourSettingChangedDelegate ColourSettingsChangedEvent;
   public delegate void ColourSettingChangedDelegate(Color color);

   void SelectColour()
   {
      using (ColourForm colourForm = new ColourForm())
      {
         if (colourForm.ShowDialog() == DialogResult.OK)
         {
            //Update colour setting and fire event
            OnColourSettingsChanged(colourForm.SelectedColour);
         }
      }
   }

   private void OnColourSettingsChanged(Color color)
   {
      if (ColourSettingsChangedEvent!=null)
        ColourSettingsChangedEvent(color);
   }
}

在你的主表格上：

主窗体会侦听设置/颜色更改事件，并将面板颜色更改为触发时事件中指定的颜色。

class MainForm()
{
    //Constructor
    MainForm()
    {
       SettingsForm.ColourSettingsChangedEvent += ColourSettingsChanged;
    }

    void ColourSettingsChanged(Color color)
    {
      upperpanel.BackColor = color;
    }
}

拥有某种设置管理器类比设置表单本身上的事件更好但是你应该明白这个想法

c＃从另一种形式更改面板颜色

1 个答案: