本文整理汇总了VB.NET中System.Windows.Forms.DataGridViewCellCancelEventHandler代理的典型用法代码示例。如果您正苦于以下问题：VB.NET DataGridViewCellCancelEventHandler代理的具体用法？VB.NET DataGridViewCellCancelEventHandler怎么用？VB.NET DataGridViewCellCancelEventHandler使用的例子？那么, 这里精选的代理代码示例或许可以为您提供帮助。
在下文中一共展示了DataGridViewCellCancelEventHandler代理的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: ValidateByRow
Private Sub ValidateByRow(ByVal sender As Object, _
ByVal data As DataGridViewCellCancelEventArgs) _
Handles songsDataGridView.RowValidating
Dim row As DataGridViewRow = _
songsDataGridView.Rows(data.RowIndex)
Dim trackCell As DataGridViewCell = _
row.Cells(songsDataGridView.Columns("Track").Index)
Dim dateCell As DataGridViewCell = _
row.Cells(songsDataGridView.Columns("Release Date").Index)
data.Cancel = Not (IsTrackGood(trackCell) _
AndAlso IsDateGood(dateCell))
End Sub
Private Function IsTrackGood(ByRef cell As DataGridViewCell) As Boolean
If cell.Value.ToString().Length = 0 Then
cell.ErrorText = "Please enter a track"
songsDataGridView.Rows(cell.RowIndex).ErrorText = _
"Please enter a track"
Return False
ElseIf cell.Value.ToString().Equals("0") Then
cell.ErrorText = "Zero is not a valid track"
songsDataGridView.Rows(cell.RowIndex).ErrorText = _
"Zero is not a valid track"
Return False
ElseIf Not Integer.TryParse( _
cell.Value.ToString(), New Integer()) Then
cell.ErrorText = "A Track must be a number"
songsDataGridView.Rows(cell.RowIndex).ErrorText = _
"A Track must be a number"
Return False
End If
Return True
End Function
Private Function IsDateGood(ByRef cell As DataGridViewCell) As Boolean
If cell.Value Is Nothing Then
cell.ErrorText = "Missing date"
songsDataGridView.Rows(cell.RowIndex).ErrorText = _
"Missing date"
Return False
Else
Try
DateTime.Parse(cell.Value.ToString())
Catch ex As FormatException
cell.ErrorText = "Invalid format"
songsDataGridView.Rows(cell.RowIndex).ErrorText = _
"Invalid format"
Return False
End Try
End If
Return True
End Function