MenuStrip中不能专注于负载 [英] MenuStrip can't get focus on load
问题描述
我willt RY确切地，我有一个主要形式，我们将在Form1称之为Form1的用户有可能，throught菜单条，推出另一种形式，我们将其称之为窗体2，在窗体2我有另一种的MenuStrip和一个DataGridView。
I willt ry to be exact as possible, I have a main form we will call it "Form1" in the Form1 the user have the possibility, throught a menu strip to launch another form, we will call it "Form2", in the Form2 I have another menustrip and a datagridview.
我的问题，当用户启动窗体2我有左键2次点击前的菜单条获得激活我的意思是
My problem when the user launch the Form2 I have to click with the left button 2 time before the menu strip get "activated" what I mean is
- 在该窗口2负荷
- 在我点击菜单条项：菜单
- 没有发生
- 在我点击另一个时间菜单条向下滚动
这真的是烦人，我不能确定这一点，因为我不知道是什么原因造成它
it's really anoying and I can't fix this because I have no idea what is causing it
如果你们有什么样的解决方案，或需要更多的信息，请告诉我。
if you guys have any kind of solution or need more information just tell me.
这是窗体2名为Ajout.vb
This is the Form2 named Ajout.vb
Imports System.Data.OleDb
Imports System.Globalization
Public Class Ajout
Private dSet As DataSet
Private dAdapter As New OleDbDataAdapter
Private bJustEdit As Boolean = False
Sub New(ByRef dSet As DataSet, ByRef dAdapter As OleDbDataAdapter)
InitializeComponent()
Me.dSet = dSet
Me.dAdapter = dAdapter
End Sub
Private Sub Ajout_Load(sender As Object, e As EventArgs) Handles MyBase.Load
With DataGridView1
.DataSource = dSet
.DataMember = "Articles_table"
.Columns("Prix").DefaultCellStyle.Format = "C2"
Console.WriteLine(.Columns("Prix").ValueType)
For Each clm As DataGridViewColumn In .Columns
clm.SortMode = DataGridViewColumnSortMode.NotSortable
Next
End With
End Sub
Private Sub DataGridView1_DataError(ByVal sender As Object, ByVal e As DataGridViewDataErrorEventArgs) Handles DataGridView1.DataError
'Quelle est l'erreur
If (TypeOf (e.Exception) Is ConstraintException) Then
'Envoie une message box pour informer l'utilisateur avec une possibiliter
If (drMessageBoxFuntion(0) = Windows.Forms.DialogResult.Yes) Then
'Possibiliter choisi on regarde si le sender est bien de datagridview pour eviter un erreur de cast
If (TypeOf sender Is DataGridView) Then
'Nouvelle variable car sa devien inlisible avec beaucoup de cast
Dim dgvLocal As DataGridView = CType(sender, DataGridView)
Dim sNameValue As String = dgvLocal.Rows(e.RowIndex).Cells("Nom").Value.ToString
Dim dgvOriginalCells As DataGridViewCellCollection = dgvLocal.Rows(dgvFindRowsBy_Name(sNameValue).Index).Cells
Dim dgvErrorCells As DataGridViewCellCollection = dgvLocal.Rows(e.RowIndex).Cells
'Regarde si le prix est pareille si faux propose a l'utilisateur d'updater le prix avec le nouveau
'ou de simplement ajouter la quantite
If (Not Equals(dgvOriginalCells("Prix").Value.ToString, dgvErrorCells("Prix").Value.ToString)) Then
'Prix different propose de mettre a jour
If (drMessageBoxFuntion(1) = Windows.Forms.DialogResult.Yes) Then
dgvOriginalCells("Prix").Value = dErrorRow()
dgvOriginalCells("Quantité").Value += dgvErrorCells("Quantité").Value
Else
dgvOriginalCells("Quantité").Value += dgvErrorCells("Quantité").Value
End If
Else
dgvOriginalCells("Quantité").Value += dgvErrorCells("Quantité").Value
End If
'Sender inconnu
Else
MsgBox("Une erreur inconnu est survenu, aucune operation n'a été effectué, vous n'avez qu'à recommencer")
End If
End If
'Si lettre entré, msg pour informer le reste est gerer par le dataset qui n'accepte que
'les chiffre, car defini dans la database
ElseIf (TypeOf (e.Exception) Is FormatException) Then
MsgBox("Vous ne pouvez pas entrer de lettre dans la collone de prix ou de quantité")
End If
End Sub
'Fonction contenant plusieur message box
Private Function drMessageBoxFuntion(ByVal index As Integer) As DialogResult
If (index = 0) Then
Dim drAction As DialogResult = MessageBox.Show("Vous ne pouvez pas ajouter deux fois le même nom," & _
" voulez vous ajouter la quantité du nouvelle arti" & _
"cle a celui deja présent ?", _
"Erreur, article double.", _
MessageBoxButtons.YesNo, _
MessageBoxIcon.Question)
Return drAction
ElseIf (index = 1) Then
Dim drAction As DialogResult = MessageBox.Show("Le prix de vos deux article, de même genre, diffère." & _
"Voulez-vous mettre a jour le prix à jour (oui), ou " & _
"simplement ajouter la quantité a l'item déjà présent (no" & _
"n).", "Erreur, prix different", _
MessageBoxButtons.YesNo, _
MessageBoxIcon.Question)
Return drAction
End If
Return Nothing
End Function
'Retourne une datagridviewROW et non l'index car permet d'avoir l'objet
'et donc de prendre la methode index ou autre methode si le besoin est
Private Function dgvFindRowsBy_Name(ByVal oNameValue As Object) As DataGridViewRow
For Each row As DataGridViewRow In DataGridView1.Rows
If row.Cells.Item("Nom").Value = oNameValue Then
Return row
End If
Next
Return Nothing
End Function
'Message pre programmer dans une array permettant l'affichage de message avec une input
Private Function dErrorRow() As Single
Dim dNewValue As Object = InputBox("Nouveau prix, entrez uniquement un nombre s'il vous plait.")
Do Until IsNumeric(dNewValue)
dNewValue = InputBox("Nouveau prix, entrez uniquement un nombre s'il vous plait.")
Loop
Return CType(dNewValue, Single)
End Function
Private Sub DataGridView1_RowValidating(sender As Object, e As DataGridViewCellCancelEventArgs) Handles DataGridView1.RowValidating
If (TypeOf sender Is DataGridView) Then
Dim dgvRow As DataGridViewRow = CType(sender, DataGridView).Rows(e.RowIndex)
If (Not ((IsDBNull(dgvRow.Cells("Nom").Value) Or IsDBNull(dgvRow.Cells("Prix").Value) Or IsDBNull(dgvRow.Cells("Quantité").Value)) = (IsDBNull(dgvRow.Cells("Nom").Value) And IsDBNull(dgvRow.Cells("Prix").Value) And IsDBNull(dgvRow.Cells("Quantité").Value)))) Then
MsgBox("Veuillez remplir toute les cases.")
e.Cancel = True
End If
End If
End Sub
Private Sub DataGridView1_CellValidating(sender As Object, e As DataGridViewCellValidatingEventArgs) Handles DataGridView1.CellValidating
If (TypeOf sender Is DataGridView) Then
Dim dgvRow As DataGridViewRow = CType(sender, DataGridView).Rows(e.RowIndex)
If (Not dgvRow.IsNewRow) Then
If (e.ColumnIndex = 1) Then
Dim dTemp As Single
If (Not Single.TryParse(e.FormattedValue.ToString, NumberStyles.Currency, CultureInfo.CurrentCulture, dTemp) OrElse dTemp < 0) Then
MsgBox("La valeur ne doit pas être négative ni être une lettre. Ne laisser pas la case vide non plus.")
e.Cancel = True
End If
ElseIf (e.ColumnIndex = 2) Then
Dim iTemp As Integer
If (Not Integer.TryParse(e.FormattedValue.ToString, NumberStyles.Currency, CultureInfo.CurrentCulture, iTemp) OrElse iTemp < 0) Then
MsgBox("La valeur ne doit pas être négative ni être une lettre. Ne laisser pas la case vide non plus.")
e.Cancel = True
End If
End If
End If
dgvRow.Selected = False
End If
End Sub
Private Sub EnregistrerToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles EnregistrerToolStripMenuItem.Click
If dSet.HasChanges Then
Try
Using con = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source = Mokmeuh.accdb")
con.Open()
Dim cmb As New OleDbCommandBuilder(dAdapter)
dAdapter.Update(dSet.Tables("Articles_Table"))
End Using
Catch ex As Exception
End Try
End If
End Sub
Private Sub AnnulerToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles AnnulerToolStripMenuItem.Click
dSet.RejectChanges()
DataGridView1.Refresh()
End Sub
End Class
更多precision
More precision
推荐答案
这是在MenuStrip中和ToolStrip的类缺陷，他们没有正确处理WM_MOUSEACTIVATE通知。这些类有大量的怪癖，他们支持的窗口少的控制，并让他们模仿的确切的相同的行为作为一个正常的Windows窗口从来都不是问题。这些怪癖没有得到解决，的WinForms队拿到了.NET 2.0版本将资源集中用于WPF后不久打破了。
This is a flaw in the MenuStrip and ToolStrip classes, they don't properly handle the WM_MOUSEACTIVATE notification. These classes have plenty of quirks, they support window-less controls and getting them to emulate the exact same behavior as a normal Windows window is never not a problem. These quirks didn't get addressed, the Winforms team got broken up shortly after the .NET 2.0 release to dedicate resources to WPF.
这应该是一个评论，但已经有太多有解决方案显着的， LarsTech 已经想出了一个很好的解决方案。你会发现它在这个答案。
This should be a comment but there are already too many to have the solution noticeable, LarsTech already came up with a good solution. You'll find it in this answer.
要做到这一点是VB.NET，用鼠标右键单击您的项目，然后单击添加+级。复制粘贴此code：
To do this is VB.NET, right-click your project and click Add + Class. Paste this code:
Public Class MyMenuStrip
Inherits MenuStrip
Protected Overrides Sub WndProc(ByRef m As Message)
'' Set focus on WM_MOUSEACTIVATE message
If m.Msg = &H21 AndAlso Me.CanFocus AndAlso Not Me.Focused Then
Me.Focus()
End If
MyBase.WndProc(m)
End Sub
End Class
点击生成+生成。现在，您将有MyMenuStrip项目在工具箱的顶部。您放到表单上，替换现有的MenuStrip。
Click Build + Build. You'll now have the MyMenuStrip item at the top of the toolbox. Drop it on your form, replacing the existing MenuStrip.
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