Question

我能够验证细胞是否为空，但我无法检查细胞的长度。我希望用户输入5位数，如果小于5位，则显示一个消息框。

我尝试了cellvalue.length方法，但它不起作用。

Private Sub dgvResults_CellValidating(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellValidatingEventArgs) Handles dgvResults.CellValidating
        'variables
        Dim columnName As String = dgvResults.Columns(e.ColumnIndex).Name
        Dim cellVal As String = e.FormattedValue.ToString()

        'Datagrid view validation
        If ((e.ColumnIndex = 0) And (e.FormattedValue = "") And (Not (cellVal.Length = 5))) Then
            e.Cancel = True
            MessageBox.Show(columnName & " must be 5 Digits Long!")
        ElseIf (e.ColumnIndex = 1 And e.FormattedValue = "") Then
            e.Cancel = True
            MessageBox.Show(columnName & " cannot be blank!")
        ElseIf (e.ColumnIndex = 2 And e.FormattedValue = "") Then
            e.Cancel = True
            MessageBox.Show(columnName & " cannot be blank!")
        ElseIf ((e.ColumnIndex = 3) And (e.FormattedValue = "") And (Not IsNumeric(e.FormattedValue))) Then
            e.Cancel = True
            MessageBox.Show(columnName & " cannot be blank!")
        ElseIf ((e.ColumnIndex = 4) And (Not IsNumeric(e.FormattedValue))) Then
            e.Cancel = True
            MessageBox.Show(columnName & " cannot be blank!")
        End If

    End Sub

Answer 1

以下导致您的代码无效：

(e.FormattedValue = "") And (Not (cellVal.Length = 5))

您正在检查该值是否为空还它的长度是＆lt;＆gt; 5.

但是你想确保cellVal.Length = 5：

If e.ColumnIndex = 0 AndAlso cellVal.Length <> 5 Then
        e.Cancel = True
        MessageBox.Show(columnName & " must be 5 Digits Long!")
End If

Answer 2

我想你需要：

cellval.text.length

如何在datagrid视图中检查单元格的长度值？

2 个答案: