Question

我有一个带有以下代码的datagridview：

    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CellEndEdit事件的运行。我可以使用它来禁用/启用事件：

datagridview_CustomerList.CellEndEdit += datagridview_CustomerList_CellEndEdit;

这没有帮助，因为我没有地方放上面这一行。如果我将它放在datagridview_CustomerList_CellMouseDoubleClick中，它仍会在此事件结束后运行。

因为我没有去吃午饭，所以我很想过去，我应该责备一些事情，但是...

有没有更好的方法来处理它而不是使用bool？

谢谢！

Answer 1

你可以使用chain of responsibility模式，但老实说，我认为你的用例不能保证它，并且bool解决方案没问题。

那说它可以像这样实现

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;

阻止事件为datagridview运行

1 个答案: