SCCManager/Remontor/SContexMenuTB.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Remontor
{
    public static class SMetodForm
    {
        public static void EnableContextMenu(this TextBox tb)
        {
            if (tb.ContextMenuStrip == null)
            {
                ContextMenuStrip cms = new ContextMenuStrip();
                cms.ShowImageMargin = false;

                ToolStripMenuItem tsmiUndo = new ToolStripMenuItem("Отменить");
                tsmiUndo.Click += (sender, e) => tb.Undo();
                cms.Items.Add(tsmiUndo);

                cms.Items.Add(new ToolStripSeparator());

                ToolStripMenuItem tsmiCut = new ToolStripMenuItem("Вырезать");
                tsmiCut.Click += (sender, e) => tb.Cut();
                cms.Items.Add(tsmiCut);

                ToolStripMenuItem tsmiCopy = new ToolStripMenuItem("Копировать");
                tsmiCopy.Click += (sender, e) => tb.Copy();
                cms.Items.Add(tsmiCopy);

                ToolStripMenuItem tsmiPaste = new ToolStripMenuItem("Вставить");
                tsmiPaste.Click += (sender, e) => tb.Paste();
                cms.Items.Add(tsmiPaste);

                ToolStripMenuItem tsmiDelete = new ToolStripMenuItem("Удалить");
                tsmiDelete.Click += (sender, e) => tb.SelectedText = "";
                cms.Items.Add(tsmiDelete);

                cms.Items.Add(new ToolStripSeparator());

                ToolStripMenuItem tsmiSelectAll = new ToolStripMenuItem("Выделить все");
                tsmiSelectAll.Click += (sender, e) => tb.SelectAll();
                cms.Items.Add(tsmiSelectAll);


                cms.Opening += (sender, e) =>
                {
                    tsmiUndo.Enabled = !tb.ReadOnly && tb.CanUndo;
                    tsmiCut.Enabled = !tb.ReadOnly && tb.SelectionLength > 0;
                    tsmiCopy.Enabled = tb.SelectionLength > 0;
                    tsmiPaste.Enabled = !tb.ReadOnly && Clipboard.ContainsText();
                    tsmiDelete.Enabled = !tb.ReadOnly && tb.SelectionLength > 0;
                    tsmiSelectAll.Enabled = tb.TextLength > 0 && tb.SelectionLength < tb.TextLength;
                };

                tb.ContextMenuStrip = cms;
            }
        }

        public static void EnableContextMenu(this NumericUpDown tb)
        {
            if (tb.ContextMenuStrip == null)
            {
                ContextMenuStrip cms = new ContextMenuStrip();
              //  cms.ShowImageMargin = false;


                tb.ContextMenuStrip = cms;
            }
        }
    }
}