Datagridviewcombobox将不会保持下拉菜单 [英] Datagridviewcombobox Will Not Stay Dropdown

问题描述

我到处都找到了一些代码，并且能够提出一些代码来将DGVCombobox的样式更改为下拉列表，而不是下拉列表.它本身可以正常工作，但是当我在EditingControlShowing处理程序中添加更多代码以解决另一种控件类型(阻止用户在第3列的文本框中输入除十进制数字之外的任何内容)时，它会中断.当我在选择处理的文本框后选择另一个单元格时，DGVCombobox停止工作.如果我注释掉处理第3列文本框的代码，则处理组合框类型的代码将再次起作用.我缺少明显的东西吗?

I found some code here and there and was able to come up with some code to change the style of the DGVCombobox to a dropdown instead of droplist. It works fine by itself, but when I add more code in the EditingControlShowing handler to address another control type (stop user from entering anything but a decimal number in a textbox in column 3) it breaks. When I select another cell after selecting the handled textbox, the DGVCombobox stops working. If I comment out the code to handle column 3 textbox, the code for handling the combobox type works again. Am I missing something obvious?

'Allow user to enter new values for ALL DataGridViewComboBox controls in the DataGridView
If (TypeOf e.Control Is DataGridViewComboBoxEditingControl) Then
    Dim cmb As DataGridViewComboBoxEditingControl = CType(e.Control, DataGridViewComboBoxEditingControl)
    If Not cmb Is Nothing Then
        cmb.DropDownStyle = ComboBoxStyle.DropDown
    End If
End If
' stop user from entering anything but a decimal number with 2 decimal places into column 3
If (TypeOf e.Control Is DataGridViewTextBoxEditingControl) Then
    If (JobComponentsDataGridView.CurrentCell.ColumnIndex = 2) Then
        Dim textBox As TextBox
        textBox = CType(e.Control, TextBox)
        If (Not (textBox) Is Nothing) Then
            AddHandler textBox.KeyPress, AddressOf DataGridViewTextColumn_KeyPress_NumericOnly
            RemoveHandler Me.JobComponentsDataGridView.EditingControlShowing, AddressOf JobComponentsDataGridView_EditingControlShowing
        End If
    End If
End If

推荐答案

尝试此链接.....

http://www.rustemsoft.com/vbbegin.asp

Try this link.....

http://www.rustemsoft.com/vbbegin.asp

我不知道使用DGVcombobox是否太慢而无法正常运行该程序.你同意我的观点吗?

I wonder if using DGVcombobox is too slow that can''t run the program normally . Do you agree with me ?

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