我有这个DataGridView
,它有一个DataGridViewTextBoxColumn
用户可以输入数字的地方,在他输入之后,我执行搜索以查找该数字下的先前记录。
我想显示这些记录,以便用户可以选择其中一个,或保留键入的值,这意味着他想创建一条新记录。
为此,我想在用户完成输入后将每个DataGridViewTextBoxCell
for a替换为这些选项。DataGridViewComboBoxCell
但是,当我尝试执行此替换时,它会引发此异常:System.Windows.Forms.dll 中的“System.InvalidOperationException”。附加信息:该操作无效,因为它导致重新进入对函数 SetCurrentCellAddressCore 的调用。
这是我的代码(我已经尝试处理CellLeave
而不是CellValidated
):
Private Sub DataGridViewDebitos_CellValidated(sender As Object, e As DataGridViewCellEventArgs) Handles DataGridViewDebitos.CellValidated
DataGridViewDebitos.EndEdit(DataGridViewDataErrorContexts.Commit)
If e.ColumnIndex = ColumnDebito.Index Then
Dim cellDebito = DataGridViewDebitos.Rows(e.RowIndex).Cells(ColumnDebito.Index)
Dim numDebito = String.Concat(If(cellDebito.Value, "").ToString.Where(Function(c) Char.IsLetterOrDigit(c)))
If TypeOf cellDebito Is DataGridViewTextBoxCell AndAlso numDebito.Length >= 3 Then
Dim prcsa As New List(Of JObject) 'In real version, prcsa is populated by an external function, but it doesn't affect the result
Dim j = New JObject
j.SetProperty("id", 0)
j.SetProperty("nome", cellDebito.Value)
prcsa.Insert(0, j) 'This option is always present, it allows user to keep simply what was typed
'Exception hapens here
DataGridViewDebitos(cellDebito.ColumnIndex, cellDebito.RowIndex) =
New DataGridViewComboBoxCell With {
.DataSource = prcsa,
.DisplayMember = "nome",
.FlatStyle = FlatStyle.Flat,
.ValueMember = "id",
.Value = prcsa(0).Value(Of Integer)("id")}
End If
End If
End Sub
非常感谢