c# - 防止事件为 datagridview 运行

Question

我有一个包含以下代码的数据 GridView :

    private void datagridview_CustomerList_CellEndEdit(object sender, DataGridViewCellEventArgs e)
    {
        if (!_continueCellEdit)
        {
            _continueCellEdit = true;
            return;
        }

        if (datagridview_CustomerList.Rows[e.RowIndex].Cells[e.ColumnIndex].OwningColumn.Name == ColumnNames.NewRateColumn.ToString())
        {
            var row = datagridview_CustomerList.Rows[e.RowIndex];
            var font = datagridview_CustomerList.Font;

            if (modMain.SSS_ToDecimal(row.Cells[ColumnNames.NewRateColumn.ToString()].Value) > 0)
            {
                row.DefaultCellStyle.Font = new Font(font, FontStyle.Regular);
                if (modMain.SSS_ToDecimal(row.Cells[ColumnNames.BudgetBalanceColumn.ToString()].Value) > 0)
                    row.DefaultCellStyle.BackColor = color_BudgetCustomers;
                else
                    row.DefaultCellStyle.BackColor = color_OriginalColor;
            }
            else
            {
                row.DefaultCellStyle.BackColor = color_ZeroCharge;
                row.DefaultCellStyle.Font = new Font(font, FontStyle.Strikeout);
            }
        }

    }

    private void datagridview_CustomerList_CellMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e)
    {
        _continueCellEdit = false;
        PaintRow(datagridview_CustomerList.Rows[e.RowIndex]);
    }

我正在使用 _continueCellEdit 来阻止运行 CellEndEdit 事件。我可以使用它来禁用/启用事件:

datagridview_CustomerList.CellEndEdit += datagridview_CustomerList_CellEndEdit;

这无济于事，因为我没有地方放置上面的行。如果我将它放在 datagridview_CustomerList_CellMouseDoubleClick 中，它在此事件完成后仍会运行。

我可能想多了，因为我没有吃午饭，我得怪罪什么，但是......

有没有比使用 bool 值更好的处理方法？

谢谢!

Answer 1

您可以使用 chain of responsibility模式，但老实说我不认为你的用例保证它并且 bool 解决方案很好。

据说可以这样实现

链中的第一个处理程序基本上看起来像

 public DoubliClickHanlder : IChain
 {
    public IChain NextHandler(get;set;)

 public void ProcessEvent(object sender, DataGridViewCellEventArgs e)
    {
      if !(this.continueCellEdit && this.NextHandler!= null)
          NextHandler.ProcessEvent(sender,e) 
    }

 }

第二个处理程序看起来像

public GridColorSetter : IChain
{
 public IChain NextHandler(get;set;)
public void ProcessEvent(object sender, DataGridViewCellEventArgs e)
{
       if (datagridview_CustomerList.Rows[e.RowIndex].Cells[e.ColumnIndex].OwningColumn.Name == ColumnNames.NewRateColumn.ToString())
        {
            var row = datagridview_CustomerList.Rows[e.RowIndex];
            var font = datagridview_CustomerList.Font;

            if (modMain.SSS_ToDecimal(row.Cells[ColumnNames.NewRateColumn.ToString()].Value) > 0)
            {
                row.DefaultCellStyle.Font = new Font(font, FontStyle.Regular);
                if (modMain.SSS_ToDecimal(row.Cells[ColumnNames.BudgetBalanceColumn.ToString()].Value) > 0)
                    row.DefaultCellStyle.BackColor = color_BudgetCustomers;
                else
                    row.DefaultCellStyle.BackColor = color_OriginalColor;
            }
            else
            {
                row.DefaultCellStyle.BackColor = color_ZeroCharge;
                row.DefaultCellStyle.Font = new Font(font, FontStyle.Strikeout);
            }
        }

    if (this.NextHandler!= null)
      this.NextHandler.ProcessEvent;

 }
}
}

然后你可以写下面的

DoubleClickHandler dch = new DoubleClickHandler () {NextHandler= new GridColorSetter()}
this.datagridview_CustomerList.CellEndEdit += dch.ProcessEvent;