如何在vb.net中通过单击按钮检查datagridview单元格是否为空？

在保存数据之前，在筛选或检查一个或多个datagridview单元格是否为null时，我需要帮助。我试过几个代码，但总是有错误。下面是图片

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提前感谢。

您可以编写如下函数：

For Each rw As DataGridViewRow In dataGridView1.Rows
    For i As Integer = 0 To rw.Cells.Count - 1                  
        If rw.Cells(i).Value Is Nothing OrElse rw.Cells(i).Value = DBNull.Value OrElse  String.IsNullOrWhitespace(rw.Cells(i).Value.ToString()) Then
                  'empty
        End If
    Next
Next

Public Function IsDataGridViewEmpty(ByRef dataGridView As DataGridView) As Boolean
    Dim isEmpty As Boolean = True
    For Each row As DataGridViewRow In dataGridView.Rows
        For Each cell As DataGridViewCell In row.Cells
            If Not String.IsNullOrEmpty(cell.Value) Then
                If Not String.IsNullOrEmpty(Trim(cell.Value.ToString())) Then
                    isEmpty = False
                    Exit For
                End If
             End If
        Next
    Next
    Return isEmpty
 End Function

或使用Linq：

Public Function IsDataGridViewEmpty(ByRef dataGridView As DataGridView) As Boolean
    Dim isEmpty As Boolean = True
    For Each row As DataGridViewRow In From row1 As DataGridViewRow In dataGridView.Rows Where (From cell As DataGridViewCell In row1.Cells Where Not String.IsNullOrEmpty(cell.Value)).Any(Function(cell) Not String.IsNullOrEmpty(Trim(cell.Value.ToString())))
        isEmpty = False
    Next
    Return isEmpty
End Function

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…先生，你能把它翻译成vb.net代码吗？…谢谢你的翻译。我希望它能帮上忙。如果我试过你建议的代码，但它仍然可以保存，尽管有空单元格。如果我找到了解决方案。我刚刚将“String.IsNullOrEmpty（rw.Cells（I.Value）”替换为“String.IsNullOrWhitespace（rw.Cells（I.Value.ToString（））”。无论如何，非常感谢你的想法：-）