Question

Databound controls inside tabcontrol tabs do not bind until after the tab is selected! Workarounds?

Asked by: bd9000

I discovered to my horror what appears to be a bug with the TabControl that comes with VS2008 (and every 3rd party tab control on the market that derives from this).

I built a sample text table on SQL 2005 Server with 3 columns  "idx" (integer), "col1" (string) and "col2" (money)

I built a simple form with 1 TabControl with 2 tab pages.
On the first tab page I put in 2 databound textboxes.  idx & col1
On the second page, I put in a single databound textbox.  col2

There is a 4th text box outside of the TabControl that will have it's Text property changed to the text value of the databound col2 textbox when an event (does not matter the event, I've tried just about every one!) is fired (ie indexchanged, textchanged, etc.)

If a user is scrolling through records using a BindingNavigator, but does NOT click on the second tab, the col2 textbox is never filled with it's databound value!
To make matters worse, even if I programmatically change the selectedIndex of the TabControl right after the dataset is filled and then call the Refresh on the TabPages after each index, it STILL won't bind it.  A user has to manually click the mouse on the tabPage (tab) to get the controls on the page (textbox, in this example) to update their contents.

In the real application, there are 6 tabPages with 8-15 controls on each page.  Because there are 85 columns on the table, the only way to fit it into the form is to put the fields in tabPages or force the user to scroll a single page with 85 fields (not an option here).


Any ideas or workarounds?

Attached is the code below:

' Main Form *************************************
Public Class Form1
 
    Private Sub TestBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TestBindingNavigatorSaveItem.Click
        Me.Validate()
        Me.TestBindingSource.EndEdit()
        Me.TableAdapterManager.UpdateAll(Me.WPMlocalDataSet)
 
    End Sub
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'TODO: This line of code loads data into the 'WPMlocalDataSet.test' table. You can move, or remove it, as needed.
        Me.TestTableAdapter.Fill(Me.WPMlocalDataSet.test)
        'Me.TextBox1.Text = Me.Col2TextBox.Text  'can't use this unless you start on TabPage 2
 
    End Sub
 
    Private Sub BindingNavigatorMoveNextItem_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BindingNavigatorMoveNextItem.Click
        Me.TextBox1.Text = Me.Col2TextBox.Text 'This won't work (nor will any events from the BN unless you start on TabPage 2 or click on it first otherwise Col2TextBox.TexT is still empty)
    End Sub
End Class
 
 
' Designer ********************************************************************************************
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form
 
    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        Try
            If disposing AndAlso components IsNot Nothing Then
                components.Dispose()
            End If
        Finally
            MyBase.Dispose(disposing)
        End Try
    End Sub
 
    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer
 
    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container
        Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(Form1))
        Dim IdxLabel As System.Windows.Forms.Label
        Dim Col1Label As System.Windows.Forms.Label
        Dim Col2Label As System.Windows.Forms.Label
        Me.TestBindingNavigator = New System.Windows.Forms.BindingNavigator(Me.components)
        Me.BindingNavigatorAddNewItem = New System.Windows.Forms.ToolStripButton
        Me.BindingNavigatorCountItem = New System.Windows.Forms.ToolStripLabel
        Me.BindingNavigatorDeleteItem = New System.Windows.Forms.ToolStripButton
        Me.BindingNavigatorMoveFirstItem = New System.Windows.Forms.ToolStripButton
        Me.BindingNavigatorMovePreviousItem = New System.Windows.Forms.ToolStripButton
        Me.BindingNavigatorSeparator = New System.Windows.Forms.ToolStripSeparator
        Me.BindingNavigatorPositionItem = New System.Windows.Forms.ToolStripTextBox
        Me.BindingNavigatorSeparator1 = New System.Windows.Forms.ToolStripSeparator
        Me.BindingNavigatorMoveNextItem = New System.Windows.Forms.ToolStripButton
        Me.BindingNavigatorMoveLastItem = New System.Windows.Forms.ToolStripButton
        Me.BindingNavigatorSeparator2 = New System.Windows.Forms.ToolStripSeparator
        Me.TestBindingNavigatorSaveItem = New System.Windows.Forms.ToolStripButton
        Me.TabControl1 = New System.Windows.Forms.TabControl
        Me.TabPage1 = New System.Windows.Forms.TabPage
        Me.TabPage2 = New System.Windows.Forms.TabPage
        Me.IdxTextBox = New System.Windows.Forms.TextBox
        Me.Col1TextBox = New System.Windows.Forms.TextBox
        Me.Col2TextBox = New System.Windows.Forms.TextBox
        Me.TestBindingSource = New System.Windows.Forms.BindingSource(Me.components)
        Me.WPMlocalDataSet = New TabTestApp.WPMlocalDataSet
        Me.TestTableAdapter = New TabTestApp.WPMlocalDataSetTableAdapters.testTableAdapter
        Me.TableAdapterManager = New TabTestApp.WPMlocalDataSetTableAdapters.TableAdapterManager
        Me.TextBox1 = New System.Windows.Forms.TextBox
        IdxLabel = New System.Windows.Forms.Label
        Col1Label = New System.Windows.Forms.Label
        Col2Label = New System.Windows.Forms.Label
        CType(Me.TestBindingNavigator, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.TestBindingNavigator.SuspendLayout()
        Me.TabControl1.SuspendLayout()
        Me.TabPage1.SuspendLayout()
        Me.TabPage2.SuspendLayout()
        CType(Me.TestBindingSource, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.WPMlocalDataSet, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'TestBindingNavigator
        '
        Me.TestBindingNavigator.AddNewItem = Me.BindingNavigatorAddNewItem
        Me.TestBindingNavigator.BindingSource = Me.TestBindingSource
        Me.TestBindingNavigator.CountItem = Me.BindingNavigatorCountItem
        Me.TestBindingNavigator.DeleteItem = Me.BindingNavigatorDeleteItem
        Me.TestBindingNavigator.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.BindingNavigatorMoveFirstItem, Me.BindingNavigatorMovePreviousItem, Me.BindingNavigatorSeparator, Me.BindingNavigatorPositionItem, Me.BindingNavigatorCountItem, Me.BindingNavigatorSeparator1, Me.BindingNavigatorMoveNextItem, Me.BindingNavigatorMoveLastItem, Me.BindingNavigatorSeparator2, Me.BindingNavigatorAddNewItem, Me.BindingNavigatorDeleteItem, Me.TestBindingNavigatorSaveItem})
        Me.TestBindingNavigator.Location = New System.Drawing.Point(0, 0)
        Me.TestBindingNavigator.MoveFirstItem = Me.BindingNavigatorMoveFirstItem
        Me.TestBindingNavigator.MoveLastItem = Me.BindingNavigatorMoveLastItem
        Me.TestBindingNavigator.MoveNextItem = Me.BindingNavigatorMoveNextItem
        Me.TestBindingNavigator.MovePreviousItem = Me.BindingNavigatorMovePreviousItem
        Me.TestBindingNavigator.Name = "TestBindingNavigator"
        Me.TestBindingNavigator.PositionItem = Me.BindingNavigatorPositionItem
        Me.TestBindingNavigator.Size = New System.Drawing.Size(752, 25)
        Me.TestBindingNavigator.TabIndex = 1
        Me.TestBindingNavigator.Text = "BindingNavigator1"
        '
        'BindingNavigatorAddNewItem
        '
        Me.BindingNavigatorAddNewItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorAddNewItem.Image = CType(resources.GetObject("BindingNavigatorAddNewItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorAddNewItem.Name = "BindingNavigatorAddNewItem"
        Me.BindingNavigatorAddNewItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorAddNewItem.Size = New System.Drawing.Size(23, 22)
        Me.BindingNavigatorAddNewItem.Text = "Add new"
        '
        'BindingNavigatorCountItem
        '
        Me.BindingNavigatorCountItem.Name = "BindingNavigatorCountItem"
        Me.BindingNavigatorCountItem.Size = New System.Drawing.Size(35, 22)
        Me.BindingNavigatorCountItem.Text = "of {0}"
        Me.BindingNavigatorCountItem.ToolTipText = "Total number of items"
        '
        'BindingNavigatorDeleteItem
        '
        Me.BindingNavigatorDeleteItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorDeleteItem.Image = CType(resources.GetObject("BindingNavigatorDeleteItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorDeleteItem.Name = "BindingNavigatorDeleteItem"
        Me.BindingNavigatorDeleteItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorDeleteItem.Size = New System.Drawing.Size(23, 22)
        Me.BindingNavigatorDeleteItem.Text = "Delete"
        '
        'BindingNavigatorMoveFirstItem
        '
        Me.BindingNavigatorMoveFirstItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorMoveFirstItem.Image = CType(resources.GetObject("BindingNavigatorMoveFirstItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorMoveFirstItem.Name = "BindingNavigatorMoveFirstItem"
        Me.BindingNavigatorMoveFirstItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorMoveFirstItem.Size = New System.Drawing.Size(23, 22)
        Me.BindingNavigatorMoveFirstItem.Text = "Move first"
        '
        'BindingNavigatorMovePreviousItem
        '
        Me.BindingNavigatorMovePreviousItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorMovePreviousItem.Image = CType(resources.GetObject("BindingNavigatorMovePreviousItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorMovePreviousItem.Name = "BindingNavigatorMovePreviousItem"
        Me.BindingNavigatorMovePreviousItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorMovePreviousItem.Size = New System.Drawing.Size(23, 22)
        Me.BindingNavigatorMovePreviousItem.Text = "Move previous"
        '
        'BindingNavigatorSeparator
        '
        Me.BindingNavigatorSeparator.Name = "BindingNavigatorSeparator"
        Me.BindingNavigatorSeparator.Size = New System.Drawing.Size(6, 25)
        '
        'BindingNavigatorPositionItem
        '
        Me.BindingNavigatorPositionItem.AccessibleName = "Position"
        Me.BindingNavigatorPositionItem.AutoSize = False
        Me.BindingNavigatorPositionItem.Name = "BindingNavigatorPositionItem"
        Me.BindingNavigatorPositionItem.Size = New System.Drawing.Size(50, 23)
        Me.BindingNavigatorPositionItem.Text = "0"
        Me.BindingNavigatorPositionItem.ToolTipText = "Current position"
        '
        'BindingNavigatorSeparator1
        '
        Me.BindingNavigatorSeparator1.Name = "BindingNavigatorSeparator1"
        Me.BindingNavigatorSeparator1.Size = New System.Drawing.Size(6, 25)
        '
        'BindingNavigatorMoveNextItem
        '
        Me.BindingNavigatorMoveNextItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorMoveNextItem.Image = CType(resources.GetObject("BindingNavigatorMoveNextItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorMoveNextItem.Name = "BindingNavigatorMoveNextItem"
        Me.BindingNavigatorMoveNextItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorMoveNextItem.Size = New System.Drawing.Size(23, 22)
        Me.BindingNavigatorMoveNextItem.Text = "Move next"
        '
        'BindingNavigatorMoveLastItem
        '
        Me.BindingNavigatorMoveLastItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.BindingNavigatorMoveLastItem.Image = CType(resources.GetObject("BindingNavigatorMoveLastItem.Image"), System.Drawing.Image)
        Me.BindingNavigatorMoveLastItem.Name = "BindingNavigatorMoveLastItem"
        Me.BindingNavigatorMoveLastItem.RightToLeftAutoMirrorImage = True
        Me.BindingNavigatorMoveLastItem.Size = New System.Drawing.Size(23, 22)
        Me.BindingNavigatorMoveLastItem.Text = "Move last"
        '
        'BindingNavigatorSeparator2
        '
        Me.BindingNavigatorSeparator2.Name = "BindingNavigatorSeparator2"
        Me.BindingNavigatorSeparator2.Size = New System.Drawing.Size(6, 25)
        '
        'TestBindingNavigatorSaveItem
        '
        Me.TestBindingNavigatorSaveItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image
        Me.TestBindingNavigatorSaveItem.Image = CType(resources.GetObject("TestBindingNavigatorSaveItem.Image"), System.Drawing.Image)
        Me.TestBindingNavigatorSaveItem.Name = "TestBindingNavigatorSaveItem"
        Me.TestBindingNavigatorSaveItem.Size = New System.Drawing.Size(23, 22)
        Me.TestBindingNavigatorSaveItem.Text = "Save Data"
        '
        'TabControl1
        '
        Me.TabControl1.Controls.Add(Me.TabPage1)
        Me.TabControl1.Controls.Add(Me.TabPage2)
        Me.TabControl1.Location = New System.Drawing.Point(63, 70)
        Me.TabControl1.Name = "TabControl1"
        Me.TabControl1.SelectedIndex = 0
        Me.TabControl1.Size = New System.Drawing.Size(468, 247)
        Me.TabControl1.TabIndex = 2
        '
        'TabPage1
        '
        Me.TabPage1.Controls.Add(Col1Label)
        Me.TabPage1.Controls.Add(Me.Col1TextBox)
        Me.TabPage1.Controls.Add(IdxLabel)
        Me.TabPage1.Controls.Add(Me.IdxTextBox)
        Me.TabPage1.Location = New System.Drawing.Point(4, 22)
        Me.TabPage1.Name = "TabPage1"
        Me.TabPage1.Padding = New System.Windows.Forms.Padding(3)
        Me.TabPage1.Size = New System.Drawing.Size(460, 221)
        Me.TabPage1.TabIndex = 0
        Me.TabPage1.Text = "TabPage1"
        Me.TabPage1.UseVisualStyleBackColor = True
        '
        'TabPage2
        '
        Me.TabPage2.Controls.Add(Col2Label)
        Me.TabPage2.Controls.Add(Me.Col2TextBox)
        Me.TabPage2.Location = New System.Drawing.Point(4, 22)
        Me.TabPage2.Name = "TabPage2"
        Me.TabPage2.Padding = New System.Windows.Forms.Padding(3)
        Me.TabPage2.Size = New System.Drawing.Size(460, 221)
        Me.TabPage2.TabIndex = 1
        Me.TabPage2.Text = "TabPage2"
        Me.TabPage2.UseVisualStyleBackColor = True
        '
        'IdxLabel
        '
        IdxLabel.AutoSize = True
        IdxLabel.Location = New System.Drawing.Point(146, 54)
        IdxLabel.Name = "IdxLabel"
        IdxLabel.Size = New System.Drawing.Size(23, 13)
        IdxLabel.TabIndex = 0
        IdxLabel.Text = "idx:"
        '
        'IdxTextBox
        '
        Me.IdxTextBox.DataBindings.Add(New System.Windows.Forms.Binding("Text", Me.TestBindingSource, "idx", True))
        Me.IdxTextBox.Location = New System.Drawing.Point(175, 51)
        Me.IdxTextBox.Name = "IdxTextBox"
        Me.IdxTextBox.Size = New System.Drawing.Size(100, 20)
        Me.IdxTextBox.TabIndex = 1
        '
        'Col1Label
        '
        Col1Label.AutoSize = True
        Col1Label.Location = New System.Drawing.Point(139, 80)
        Col1Label.Name = "Col1Label"
        Col1Label.Size = New System.Drawing.Size(30, 13)
        Col1Label.TabIndex = 2
        Col1Label.Text = "col1:"
        '
        'Col1TextBox
        '
        Me.Col1TextBox.DataBindings.Add(New System.Windows.Forms.Binding("Text", Me.TestBindingSource, "col1", True))
        Me.Col1TextBox.Location = New System.Drawing.Point(175, 77)
        Me.Col1TextBox.Name = "Col1TextBox"
        Me.Col1TextBox.Size = New System.Drawing.Size(100, 20)
        Me.Col1TextBox.TabIndex = 3
        '
        'Col2Label
        '
        Col2Label.AutoSize = True
        Col2Label.Location = New System.Drawing.Point(141, 101)
        Col2Label.Name = "Col2Label"
        Col2Label.Size = New System.Drawing.Size(30, 13)
        Col2Label.TabIndex = 0
        Col2Label.Text = "col2:"
        '
        'Col2TextBox
        '
        Me.Col2TextBox.DataBindings.Add(New System.Windows.Forms.Binding("Text", Me.TestBindingSource, "col2", True))
        Me.Col2TextBox.Location = New System.Drawing.Point(177, 98)
        Me.Col2TextBox.Name = "Col2TextBox"
        Me.Col2TextBox.Size = New System.Drawing.Size(100, 20)
        Me.Col2TextBox.TabIndex = 1
        '
        'TestBindingSource
        '
        Me.TestBindingSource.DataMember = "test"
        Me.TestBindingSource.DataSource = Me.WPMlocalDataSet
        '
        'WPMlocalDataSet
        '
        Me.WPMlocalDataSet.DataSetName = "WPMlocalDataSet"
        Me.WPMlocalDataSet.SchemaSerializationMode = System.Data.SchemaSerializationMode.IncludeSchema
        '
        'TestTableAdapter
        '
        Me.TestTableAdapter.ClearBeforeFill = True
        '
        'TableAdapterManager
        '
        Me.TableAdapterManager.BackupDataSetBeforeUpdate = False
        Me.TableAdapterManager.testTableAdapter = Me.TestTableAdapter
        Me.TableAdapterManager.UpdateOrder = TabTestApp.WPMlocalDataSetTableAdapters.TableAdapterManager.UpdateOrderOption.InsertUpdateDelete
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(594, 146)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(100, 20)
        Me.TextBox1.TabIndex = 3
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(752, 421)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.TabControl1)
        Me.Controls.Add(Me.TestBindingNavigator)
        Me.Name = "Form1"
        Me.Text = "Form1"
        CType(Me.TestBindingNavigator, System.ComponentModel.ISupportInitialize).EndInit()
        Me.TestBindingNavigator.ResumeLayout(False)
        Me.TestBindingNavigator.PerformLayout()
        Me.TabControl1.ResumeLayout(False)
        Me.TabPage1.ResumeLayout(False)
        Me.TabPage1.PerformLayout()
        Me.TabPage2.ResumeLayout(False)
        Me.TabPage2.PerformLayout()
        CType(Me.TestBindingSource, System.ComponentModel.ISupportInitialize).EndInit()
        CType(Me.WPMlocalDataSet, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)
        Me.PerformLayout()
 
    End Sub
    Friend WithEvents WPMlocalDataSet As TabTestApp.WPMlocalDataSet
    Friend WithEvents TestBindingSource As System.Windows.Forms.BindingSource
    Friend WithEvents TestTableAdapter As TabTestApp.WPMlocalDataSetTableAdapters.testTableAdapter
    Friend WithEvents TableAdapterManager As TabTestApp.WPMlocalDataSetTableAdapters.TableAdapterManager
    Friend WithEvents TestBindingNavigator As System.Windows.Forms.BindingNavigator
    Friend WithEvents BindingNavigatorAddNewItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorCountItem As System.Windows.Forms.ToolStripLabel
    Friend WithEvents BindingNavigatorDeleteItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorMoveFirstItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorMovePreviousItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorSeparator As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents BindingNavigatorPositionItem As System.Windows.Forms.ToolStripTextBox
    Friend WithEvents BindingNavigatorSeparator1 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents BindingNavigatorMoveNextItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorMoveLastItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents BindingNavigatorSeparator2 As System.Windows.Forms.ToolStripSeparator
    Friend WithEvents TestBindingNavigatorSaveItem As System.Windows.Forms.ToolStripButton
    Friend WithEvents TabControl1 As System.Windows.Forms.TabControl
    Friend WithEvents TabPage1 As System.Windows.Forms.TabPage
    Friend WithEvents Col1TextBox As System.Windows.Forms.TextBox
    Friend WithEvents IdxTextBox As System.Windows.Forms.TextBox
    Friend WithEvents TabPage2 As System.Windows.Forms.TabPage
    Friend WithEvents Col2TextBox As System.Windows.Forms.TextBox
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
 
End Class

                                  
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Asked On
2009-03-12 at 18:34:13ID24226369
Tags

VB.NET

,

Winforms

,

VB.NET 2.0

,

Visual Studio 2008

Topics

.NET

,

Microsoft Visual Basic.Net

,

VB Controls

Participating Experts
2
Points
500
Comments
8

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Answers

 

by: bd9000Posted on 2009-03-12 at 19:21:35ID: 23875669

I made the following change to the code above to get it to work with iterating through the TabPages (I was trying to set the TextBox.Text on the click event of the navigation controls, originally, but the event firing order of the BindingNavigator throws the records out of synch, so the best way, so far, is to use the TextChanged event of the textbox to make it work, instead) 

Public Class Form1
 
    Private Sub TestBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TestBindingNavigatorSaveItem.Click
        Me.Validate()
        Me.TestBindingSource.EndEdit()
        Me.TableAdapterManager.UpdateAll(Me.WPMlocalDataSet)
    End Sub
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'TODO: This line of code loads data into the 'WPMlocalDataSet.test' table. You can move, or remove it, as needed.
        Me.TestTableAdapter.Fill(Me.WPMlocalDataSet.test)
 
        IterateTabs_TabControl1() 'the textchanged event will fire for the textbox once the iteration hits the TabPage the textbox is on
    End Sub
 
    Private Sub IterateTabs_TabControl1()
        With TabControl1
            Dim lastSelectedTabIndex As Integer = .SelectedIndex
            If lastSelectedTabIndex < 0 OrElse lastSelectedTabIndex > .TabCount Then lastSelectedTabIndex = 0
            For currentTab As Integer = 0 To .TabCount - 1
                .SelectedIndex = currentTab
            Next
            .SelectedIndex = lastSelectedTabIndex
        End With
    End Sub
 
    Private Sub TestBindingNavigator_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles TestBindingNavigator.Click
        IterateTabs_TabControl1()
    End Sub
 
    Private Sub BindingNavigatorMoveFirstItem_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BindingNavigatorMoveFirstItem.Click
        IterateTabs_TabControl1()
    End Sub
 
    Private Sub BindingNavigatorMoveLastItem_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BindingNavigatorMoveLastItem.Click
        IterateTabs_TabControl1()
    End Sub
 
    Private Sub BindingNavigatorMoveNextItem_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BindingNavigatorMoveNextItem.Click
        IterateTabs_TabControl1()
    End Sub
 
    Private Sub BindingNavigatorMovePreviousItem_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BindingNavigatorMovePreviousItem.Click
        IterateTabs_TabControl1()
    End Sub
 
    Private Sub Col2TextBox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles Col2TextBox.TextChanged
        Me.TextBox1.Text = Me.Col2TextBox.Text  'the assignment must happen here, not in the MoveNext/Previous/First/Last click events
    End Sub
End Class

                                              
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by: bd9000Posted on 2009-03-13 at 09:34:56ID: 23881120

Anyone know of a better way to do this?

 

by: DabasPosted on 2009-03-13 at 13:32:46ID: 23883244

I have been able to reproduce your problem and have found a solution too!

The best way is to handle the events of the binding source, as they are not GUI dependant

    Private Sub TestBindingSource_CurrentChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TestBindingSource.CurrentChanged
        Dim drv As DataRowView = CType(TestBindingSource.Current, DataRowView)
 
        Me.TextBox1.Text = CType(drv.Row, YourClass.RowObject).FieldName
    End Sub
                                              
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by: bd9000Posted on 2009-03-20 at 16:12:54ID: 23944770

That's great, thanks.
I'll just have to make a calculations on the "backside" from here on out.
The flipping through the tabs was a poor solution (I figured it was).

 

by: bd9000Posted on 2009-08-08 at 16:39:25ID: 25052163

I created a better solution for controls residing on other TabPages (for all of those people struggling with this issue):

Here was what I came up with for controls on other tabpages that have yet to be created:
The BindingComplete event for the binding source will fire for each databound control (even ones not created yet), so this was the logical place to start.


 
Private Sub YourBindingSource_BindingComplete(ByVal sender As Object, ByVal e As System.Windows.Forms.BindingCompleteEventArgs) Handles YourBindingSource.BindingComplete
 
        If Not e.Binding.Control.Created Then
            'if a control is residing on a different tabpage and the tabpage has not yet been selected, the child controls will not be created, hence this test
 
            'make sure the control's parent is a tabpage
            If e.Binding.Control.Parent.GetType.Name.ToLower = "tabpage" Then
 
                'show the tabpage - note the tabControl selectedIndex remains the same
                e.Binding.Control.Parent.Show()
 
                'The child controls on the tab page will now be created and filled with data!
            End If
        End If
 
 
End Sub

                                              
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by: bd9000Posted on 2009-10-26 at 20:33:34ID: 25668951

oops! That solution does not work either. - the control is not created until the tab page is clicked on by the user, so e.Binding.Control.Created will remain false - still!
Also, setting the " Me.TextBox1.Text = CType(drv.Row, YourClass.RowObject).FieldName"  in the accepted solution above only works for controls on a TabPage that has been viewed already.  Me.TextBox1.Text will never bind, so you can't do control validation (which is the whole point!).  The only solution to provide control validation (ie validate a textbox) is to iterate the tabpages or to remove control validation altogether as a group and validate each control separately on the LostFocus and/or Leave events, then validate the data in the datasource as a group when saving the record, bubble up the events, then create "custom" validators.

It seems every other new "time saving" tool created by MS has turned out to be (once again) utterly worthless for every day use.

 

by: hymie42Posted on 2009-11-25 at 14:09:47ID: 25911618

Brilliant solution - thanks so much for posting :)

 

by: hymie42Posted on 2009-11-25 at 14:12:19ID: 25911633

It worked fo rme as my users are viewing the tabs is what I meant to say.

20120131-EE-VQP-002

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