[英]How to allow one period only in Datagridview Cell in vb.net
我试图使我的datagridview单元格只接受数字和一个句点。
到目前为止,我已经成功地使其仅接受数字,这是代码:
Select Case e.KeyChar
Case "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", ".", vbBack
e.Handled = False
Case Else
e.Handled = True
End Select
在我的文本框中,我还将仅接受数字和单个句点,这是代码:
Select Case e.KeyChar
Case "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", ".", vbBack
e.Handled = False
Case Else
e.Handled = True
End Select
If (txt1.Text.IndexOf(".") >= 0 And e.KeyChar = ".") Then e.Handled = True
所有代码都在KeyPress事件中。 我不知道如何使我的datagridview单元格只接受单个期间。
感谢您的帮助。
更好地处理您想要的事件是CellValueChanged
:它将仅检查确定的值,并最终对其进行更正。 您也可以依靠IsNumeric
快速找到有效的数字。 DataGridView1
示例代码:
Private Sub DataGridView1_CellValueChanged(sender As Object, e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellValueChanged
If (e.RowIndex >= 0 AndAlso e.ColumnIndex >= 0) Then
Dim curVal As String = DataGridView1(e.ColumnIndex, e.RowIndex).Value.ToString()
If (curVal.Trim().Length > 0) Then
If (curVal.Contains(".")) Then
'Checking whether the given entry has more tha one period
Dim temp() As String = curVal.Split("."c)
If (temp.Length > 2) Then
'More than one period
DataGridView1(e.ColumnIndex, e.RowIndex).Value = temp(0) & "." & temp(1)
ElseIf (Not IsNumeric(curVal)) Then
'Is not numeric
DataGridView1(e.ColumnIndex, e.RowIndex).Value = ""
End If
ElseIf (Not IsNumeric(curVal)) Then
'Any other non-numeric entry
DataGridView1(e.ColumnIndex, e.RowIndex).Value = ""
End If
End If
End If
End Sub
请记住, IsNumeric
将捕获任何非数字的情况(例如:1.32.52),因此我提供了一个前提条件,用于检查不止一个期间的特定情况,以向您展示如何处理不同的情况(您可以可能会分析整个字符串以删除特定部分,而不是删除整个单元格)。
您只需在EditingControlShowingEventArgs事件中提供下面提到的代码,并为CONTROL_PRESS事件创建一个私有子对象,即可在DATAGRID视图中限制重复的按钮非常简单。
Private Sub DataGridView1_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing
If TypeOf e.Control Is TextBox Then
Dim tb As TextBox = TryCast(e.Control, TextBox)
RemoveHandler tb.KeyPress, AddressOf CONTROL_KEYPRESS
If Me.DataGridView1.CurrentCell.ColumnIndex = 3 Or Me.DataGridView1.CurrentCell.ColumnIndex = 4 Then
AddHandler tb.KeyPress, AddressOf CONTROL_KEYPRESS
End If
End If
End Sub
Private Sub CONTROL_KEYPRESS(ByVal SENDER As TextBox, ByVal E As KeyPressEventArgs)
If (Not Char.IsControl(E.KeyChar) And Not Char.IsDigit(E.KeyChar) And E.KeyChar <> "."c) Then
E.Handled = True
End If
If (E.KeyChar = "."c And SENDER.Text.IndexOf("."c) > -1) Then
E.Handled = True
End If
End Sub
由FURQAN HALEEM准备
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