DataGridView System.InvalidOperationException單元格不在DataGridView中

Question

有一段時間以來，我第一次在Google上找不到有關此異常的任何使用信息......希望其他人可能遇到過它。

我有一個DataGridView，我驗證Leave事件上的空單元格，並刪除這些行。

如果我從DGV離開最後一個單元格在最後一排空和標籤客場以下異常被拋出：

System.InvalidOperationException：小區不在一個DataGridView。 單元格無法檢索繼承的單元格樣式。

我不使用數據綁定和，如果我把一個斷點在this.dataGridView1.Rows.RemoveAt(c.RowIndex);被擊中，如果，如果我踏入這行的異常的非用戶代碼的執行過程中引發...

我原以爲這是和Uncommitted Changed一起做的，但似乎明確地提交了這些更改並不影響結果。

我Leave事件代碼：

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; 
        } 

       } 
      } 


     } 
    } 

異常數據是在這裏：

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

如果您使用的foreach循環，你不能刪除它使用的藏品。在這裏，您從this.dataGridView1.Rows中刪除項目。

試試這個：

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; 
      } 

     } 
    } 
}