DataGridView System.InvalidOperationException单元不在DataGridView中

Question

这是一段时间以来我第一次在Google上找到关于这个异常的没有用的信息.希望其他人可能会发现。

我有一个DataGridView，用于验证左事件上的空单元格并删除这些行。

如果我将最后一个单元格空在DGV的最后一行和选项卡中，将引发以下异常：

System.InvalidOperationException:单元格不在DataGridView中。单元格无法检索继承的单元格样式。

我不使用数据绑定，如果我在this.dataGridView1.Rows.RemoveAt(c.RowIndex);放置一个断点，它就会被击中，如果我进入这一行，异常将在非用户代码的执行过程中抛出.

我原以为这与未提交的更改有关，但似乎明确提交更改并不影响结果。

我的Leave事件代码：

    private void dataGridView1_Leave(object sender, EventArgs e)
    {

        if (this.dataGridView1.IsCurrentRowDirty || this.dataGridView1.IsCurrentCellDirty) this.dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);

        //Validate for empty rows
        foreach(DataGridViewRow row in this.dataGridView1.Rows)
        {

            foreach(DataGridViewCell c in row.Cells)
            {

                if(c.Value == null || c.Value.ToString() == String.Empty)
                {
                    if (c.EditedFormattedValue == null || c.EditedFormattedValue.ToString() == "")
                    {
                        this.dataGridView1.Rows.RemoveAt(c.RowIndex);
                        break;
                    }

                }
            }


        }
    }

异常数据在这里：

System.InvalidOperationException: Cell is not in a DataGridView. The cell cannot retrieve the inherited cell style.
   at System.Windows.Forms.DataGridViewCell.GetInheritedStyle(DataGridViewCellStyle inheritedCellStyle, Int32 rowIndex, Boolean includeColors)
   at System.Windows.Forms.DataGridView.OnCellValidating(DataGridViewCell& dataGridViewCell, Int32 columnIndex, Int32 rowIndex, DataGridViewDataErrorContexts context)
   at System.Windows.Forms.DataGridView.CommitEdit(DataGridViewCell& dataGridViewCurrentCell, DataGridViewDataErrorContexts context, DataGridViewValidateCellInternal validateCell, Boolean fireCellLeave, Boolean fireCellEnter, Boolean fireRowLeave, Boolean fireRowEnter, Boolean fireLeave)
   at System.Windows.Forms.DataGridView.EndEdit(DataGridViewDataErrorContexts context, DataGridViewValidateCellInternal validateCell, Boolean fireCellLeave, Boolean fireCellEnter, Boolean fireRowLeave, Boolean fireRowEnter, Boolean fireLeave, Boolean keepFocus, Boolean resetCurrentCell, Boolean resetAnchorCell)
   at System.Windows.Forms.DataGridView.ProcessDialogKey(Keys keyData)
   at System.Windows.Forms.Control.ProcessDialogKey(Keys keyData)
   at System.Windows.Forms.TextBoxBase.ProcessDialogKey(Keys keyData)
   at System.Windows.Forms.Control.PreProcessMessage(Message& msg)
   at System.Windows.Forms.Control.PreProcessControlMessageInternal(Control target, Message& msg)
   at System.Windows.Forms.Application.ThreadContext.PreTranslateMessage(MSG& msg)
   at System.Windows.Forms.Application.ThreadContext.System.Windows.Forms.UnsafeNativeMethods.IMsoComponent.FPreTranslateMessage(MSG& msg)
   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.Run(Form mainForm)

Answer 1

如果使用foreach-循环，则不能从它使用的集合中删除项。在这里，您将从this.dataGridView1.Rows.中删除项

试试这个：

for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
   DataGridViewRow row = dataGridView1.Rows[i];

   for (int k = 0; k < row.Cells.Count; k++)
   {
      DataGridViewCell c = row.Cells[k];

      if (c.Value == null || c.Value.ToString() == String.Empty)
      {
         if (c.EditedFormattedValue == null || c.EditedFormattedValue.ToString() == "")
         {
            this.dataGridView1.Rows.RemoveAt(c.RowIndex);

            // Decrease i, as the collection got smaller
            i--;
            break;
          }

       }
    }
 }