c# .net winfrom sunnyui的RichTextBox TextBox的KeyPress和KeyDown对Enter按钮无效处理

效果图：

 

在此之前感谢博主，winform无法屏蔽回车事件、KeyPress事件不执行问题解决-CSDN博客

根据该大佬的方式，需处理添加回车事件处理，便继承了RichTextBox重写该方法，且执行了执行事件

public sealed class MyUIRichTextBox : UIRichTextBox { 
    public bool LastRow=false;
	public event KeyEventHandler MyEnterEvent;
	protected override bool ProcessDialogKey(Keys keyData)
	{
		//处理回车键
		if (keyData == Keys.Enter && LastRow)
		{
            MyEnterEvent?.Invoke(this,new KeyEventArgs(keyData));
			return true;
		}
		return base.ProcessDialogKey(keyData);
	}
}

下面是实现的结果，实现自动对每行超过文本框的内容展示RichBox悬浮展示，且添加允许修改的列和回车保存

    public class UIDataGridView : DataGridView, IStyleInterface
    {
        MyUIRichTextBox richText = new MyUIRichTextBox();
        Rectangle _Rectangle;
        public UIDataGridView()
        {
            richText.MyEnterEvent += RichText_KeyDown;//这个事件是因为表格的最后一行得手动处理提交到Cell的Value
            richText.Parent = this;
            richText.Visible = false;
            richText.TabStop = false;
            richText.Font = this.Font;
			this.CellEnter += new System.Windows.Forms.DataGridViewCellEventHandler(this.dgv_CellClick);
			this.CellLeave += new DataGridViewCellEventHandler(this.dgv_CellLeave);
			this.CellValidating += new System.Windows.Forms.DataGridViewCellValidatingEventHandler(this.dgv_CellValidating);
		}
		private void RichText_KeyDown(object sender, KeyEventArgs e)
		{
			if (e.KeyCode == Keys.Enter && richText.LastRow)
			{
				dgv_CellLeave(null, null);
			}
		}
		List<string> ColumnsNameNotRich = null;
		/// <summary>
		/// 无论任何情况该列都不显示RichTextBox
		/// </summary>
		/// <param name="columns">列名</param>
		public void SetNotRich(string[] columns)
		{
			ColumnsNameNotRich = columns.ToList();
		}
		/// <summary>
		/// 可修改的多行文本框richText,richText默认是只读
		/// </summary>
		List<string> ColumnsNameMustRich = null;
		public void MustRich(string[] columns)
		{
			ColumnsNameMustRich = columns.ToList();
		}
		private void dgv_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
		{
			if (e.RowIndex < 0 || e.ColumnIndex < 0)
			{
				return;
			}
			DataGridView _dgv = this;
			if (_dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].OwningColumn.ReadOnly)
			{
				return;
			}
			Type _type = _dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].ValueType;
			if (_type == typeof(string))
			{ return; }
			object o = _dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].EditedFormattedValue;
			if (o == null || string.IsNullOrEmpty(o.ToString()))
			{
				return;
			}
			bool isError = false;
			DataGridViewColumn column = _dgv.Columns[e.ColumnIndex];
			if (_type == typeof(double) || _type == typeof(decimal) || _type == typeof(float))
			{
				decimal testD = 0;
				if (decimal.TryParse(o.ToString(), out testD) == false)
				{
					isError = true;
				}
				if (isError)
				{
					if (column is DataGridViewTextBoxColumn)
					{
						Sunny.UI.Common.ShowErrorTip("请输入正确的数值" + column.HeaderText);
						e.Cancel = true;
					}
				}
			}
			else if (_type == typeof(int))
			{
				int testD2 = 0;
				if (int.TryParse(o.ToString(), out testD2) == false)
				{
					isError = true;
				}
				if (isError)
				{
					if (column is DataGridViewTextBoxColumn)
					{
						Sunny.UI.Common.ShowErrorTip("请输入正确的数值" + column.HeaderText + ",输入整数!");
						e.Cancel = true;
					}
				}
			}
		}


		DgvFilterManager filterManager = null;
		private void dgv_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
		{
			if (filterManager == null)
			{
				filterManager = new DgvFilterManager(this); //开启万能查询
			}
			//if (this.InvokeRequired)
			//{
			//    this.Invoke(new Action(() =>
			//    {
			//        richText.Font = this.Font;
			//    }));

			//}
			//else
			//{
			//    richText.Font = this.Font;
			//}
			//new GUTAERP.UserControls.DataGridViewColumnSelector(this);
		}
		private void dgv_CellLeave(object sender, EventArgs e)
		{
			if (!richText.ReadOnly && richText.Tag != null)
			{
				DataGridViewCell cell = (DataGridViewCell)richText.Tag;
				cell.Value = richText.Text;
			}
			if (richText.Visible)
			{
				richClear();
			}
		}
		private void richClear()
		{
			richText.LastRow = false;
			richText.Visible = false;
			richText.Text = "";
			richText.Tag = null;
		}
		private void dgv_CellClick(object sender, DataGridViewCellEventArgs e)
		{
			if (e.RowIndex < 0 || e.ColumnIndex < 0)
			{
				return;
			}
			DataGridView _dgv = this;

			if (_dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].Value == null)
			{
				return;
			}
			if (richText.Visible)
			{
				richClear();
				return;
			}
			if (ColumnsNameNotRich != null)
			{
				int i = ColumnsNameNotRich.Count(a => a == _dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].OwningColumn.Name);
				if (i > 0)
				{
					return;
				}
			}

			bool mustShow = false;
			if (ColumnsNameMustRich != null)
			{
				int i = ColumnsNameMustRich.Count(a => a == _dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].OwningColumn.Name);
				if (i > 0)
				{
					mustShow = true;
				}
			}
			if (!_dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].OwningColumn.ReadOnly && !mustShow)
			{
				return;
			}
			string str = _dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString();
			int _width = TextRenderer.MeasureText(str, this.Font).Width;
			_width = str.IndexOf("\n") != -1 ? Screen.PrimaryScreen.WorkingArea.Width : _width;
			if (_width > _dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].OwningColumn.Width || mustShow)
			{
				_Rectangle = _dgv.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true); //得到所在单元格位置和大小
				richText.Text = _dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString();
				richText.Size = new Size(_dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].Size.Width, 200); //把单元格大小赋给控件
				AutoSizeControl(richText);
				richText.Location = new Point(_Rectangle.X, _Rectangle.Y + _dgv.Rows[e.RowIndex].Cells[e.ColumnIndex].Size.Height); //把单元格位置赋给控件
				richText.Visible = true;  //可以显示控件了
				richText.BringToFront();

				//richText.Focus();
				if (!mustShow)
				{
					richText.ReadOnly = true;
				}
				else
				{
　　　　　　　　　　　　richText.ReadOnly = false;
					if (_dgv.RowCount - 1 == e.RowIndex)
					{
						richText.LastRow = true;
					}
					richText.Focus();
					//光标定位最后
					richText.Select(richText.TextLength, 0);
					//滚动到控件光标处
					richText.ScrollToCaret();
				}
				richText.Tag = _dgv.Rows[e.RowIndex].Cells[e.ColumnIndex];
			}
			else
			{
				richClear();
			}
		}

		private void AutoSizeControl(Control co)
		{
			Graphics g = co.CreateGraphics();
			SizeF sif = new SizeF(co.Size.Width, 650);//最大高度
			Size preSize = g.MeasureString(co.Text, co.Font, sif).ToSize();
			if (preSize.Width < co.Width)
			{
				preSize.Width = co.Width;
			}
			if (preSize.Height < co.Height)
			{
				preSize.Height = co.Height;
			}
			co.Size = preSize;
			g.Dispose();
		}
	}

　　

 

 作者：兮去博客
出处：c# .net winfrom sunnyui的RichTextBox TextBox的KeyPress和KeyDown对Enter按钮无效处理 - 兮去 - 博客园 (cnblogs.com)
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