Scroll bar problems with Datagrid inside TabControl

B

bob01900

Freshman
Joined
Jul 6, 2003
Messages
36
I have got one datagrid inside each TabControl page, and I have them docked or anchored so they will resize according to the form's size.

If I shrink the form's size small enough so that for each page, I can see the scroll bar(s). After going through each tab page and have seen the scroll bars on each page (problem only happen if I do this), I then maximise the form so that I can see the scroll bars on the "current" tab page disappearing.

This is where the problem starts. After maximising, other tab pages' scroll bars will remain in the same position as before, even though the datagrid has expanded. So I will have the scroll bars (at the position before maximising) overlapping on the datagrid (which expanded).

Please note that I did NOT write any code for scroll bars (from datagrid). They justs appear automatically if the form/control size is too small.

I have tried update() and refresh() for both tabpages and datagrid, but nothing seem to be able to get rid of those scroll bars. But they do disappear as soon as I resize.

Just wondering if anyone else has seen this kind of problem before? Thank you for your help.
 
Public Class Form1
Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

Public Sub New()
MyBase.New()

'This call is required by the Windows Form Designer.
InitializeComponent()

'Add any initialization after the InitializeComponent() call

End Sub

'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
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.
Friend WithEvents TabControl1 As System.Windows.Forms.TabControl
Friend WithEvents TabPage1 As System.Windows.Forms.TabPage
Friend WithEvents TabPage2 As System.Windows.Forms.TabPage
Friend WithEvents DataGrid1 As System.Windows.Forms.DataGrid
Friend WithEvents DataGrid2 As System.Windows.Forms.DataGrid
Friend WithEvents DataSet1 As System.Data.DataSet
Friend WithEvents DataTable1 As System.Data.DataTable
Friend WithEvents DataTable2 As System.Data.DataTable
Friend WithEvents DataColumn1 As System.Data.DataColumn
Friend WithEvents DataColumn2 As System.Data.DataColumn
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.TabControl1 = New System.Windows.Forms.TabControl()
Me.TabPage1 = New System.Windows.Forms.TabPage()
Me.DataGrid1 = New System.Windows.Forms.DataGrid()
Me.TabPage2 = New System.Windows.Forms.TabPage()
Me.DataGrid2 = New System.Windows.Forms.DataGrid()
Me.DataSet1 = New System.Data.DataSet()
Me.DataTable1 = New System.Data.DataTable()
Me.DataColumn1 = New System.Data.DataColumn()
Me.DataTable2 = New System.Data.DataTable()
Me.DataColumn2 = New System.Data.DataColumn()
Me.TabControl1.SuspendLayout()
Me.TabPage1.SuspendLayout()
CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).BeginInit()
Me.TabPage2.SuspendLayout()
CType(Me.DataGrid2, System.ComponentModel.ISupportInitialize).BeginInit()
CType(Me.DataSet1, System.ComponentModel.ISupportInitialize).BeginInit()
CType(Me.DataTable1, System.ComponentModel.ISupportInitialize).BeginInit()
CType(Me.DataTable2, System.ComponentModel.ISupportInitialize).BeginInit()
Me.SuspendLayout()
'
'TabControl1
'
Me.TabControl1.Anchor = (((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
Or System.Windows.Forms.AnchorStyles.Left) _
Or System.Windows.Forms.AnchorStyles.Right)
Me.TabControl1.Controls.AddRange(New System.Windows.Forms.Control() {Me.TabPage1, Me.TabPage2})
Me.TabControl1.Location = New System.Drawing.Point(16, 16)
Me.TabControl1.Name = "TabControl1"
Me.TabControl1.SelectedIndex = 0
Me.TabControl1.Size = New System.Drawing.Size(472, 336)
Me.TabControl1.TabIndex = 0
'
'TabPage1
'
Me.TabPage1.Controls.AddRange(New System.Windows.Forms.Control() {Me.DataGrid1})
Me.TabPage1.Location = New System.Drawing.Point(4, 22)
Me.TabPage1.Name = "TabPage1"
Me.TabPage1.Size = New System.Drawing.Size(464, 310)
Me.TabPage1.TabIndex = 0
Me.TabPage1.Text = "TabPage1"
'
'DataGrid1
'
Me.DataGrid1.DataMember = ""
Me.DataGrid1.DataSource = Me.DataTable1
Me.DataGrid1.Dock = System.Windows.Forms.DockStyle.Fill
Me.DataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText
Me.DataGrid1.Name = "DataGrid1"
Me.DataGrid1.ReadOnly = True
Me.DataGrid1.Size = New System.Drawing.Size(464, 310)
Me.DataGrid1.TabIndex = 0
'
'TabPage2
'
Me.TabPage2.Controls.AddRange(New System.Windows.Forms.Control() {Me.DataGrid2})
Me.TabPage2.Location = New System.Drawing.Point(4, 22)
Me.TabPage2.Name = "TabPage2"
Me.TabPage2.Size = New System.Drawing.Size(464, 310)
Me.TabPage2.TabIndex = 1
Me.TabPage2.Text = "TabPage2"
'
'DataGrid2
'
Me.DataGrid2.DataMember = ""
Me.DataGrid2.DataSource = Me.DataTable2
Me.DataGrid2.Dock = System.Windows.Forms.DockStyle.Fill
Me.DataGrid2.HeaderForeColor = System.Drawing.SystemColors.ControlText
Me.DataGrid2.Name = "DataGrid2"
Me.DataGrid2.ReadOnly = True
Me.DataGrid2.Size = New System.Drawing.Size(464, 310)
Me.DataGrid2.TabIndex = 0
'
'DataSet1
'
Me.DataSet1.DataSetName = "NewDataSet"
Me.DataSet1.Locale = New System.Globalization.CultureInfo("en-NZ")
Me.DataSet1.Tables.AddRange(New System.Data.DataTable() {Me.DataTable1, Me.DataTable2})
'
'DataTable1
'
Me.DataTable1.Columns.AddRange(New System.Data.DataColumn() {Me.DataColumn1})
Me.DataTable1.TableName = "Table1"
'
'DataColumn1
'
Me.DataColumn1.ColumnName = "Column1"
'
'DataTable2
'
Me.DataTable2.Columns.AddRange(New System.Data.DataColumn() {Me.DataColumn2})
Me.DataTable2.TableName = "Table2"
'
'DataColumn2
'
Me.DataColumn2.ColumnName = "Column1"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(504, 366)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.TabControl1})
Me.Name = "Form1"
Me.Text = "Form1"
Me.TabControl1.ResumeLayout(False)
Me.TabPage1.ResumeLayout(False)
CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).EndInit()
Me.TabPage2.ResumeLayout(False)
CType(Me.DataGrid2, System.ComponentModel.ISupportInitialize).EndInit()
CType(Me.DataSet1, System.ComponentModel.ISupportInitialize).EndInit()
CType(Me.DataTable1, System.ComponentModel.ISupportInitialize).EndInit()
CType(Me.DataTable2, System.ComponentModel.ISupportInitialize).EndInit()
Me.ResumeLayout(False)

End Sub

#End Region

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim i As Integer

For i = 0 To 20
DataTable1.Rows.Add(New Object() {"Row " & CStr(i)})
DataTable2.Rows.Add(New Object() {"Row " & CStr(i)})
Next
End Sub
End Class


''''''''''''''''''''''''''''''''''''''''''''
Here is a simple example of what I am talking about. Compile this, and run the program. Then

1. Click on TabPage2
2. Maximise
3. Click on TabPage1
4. You should see the datagrid of TabPage1 still has that scroll bar

PS. Assuming you are using 1024x768 or greater resolution
 
try this one

i had same problem.
try something like this, it worked for me.
call it in tab resize or click.


Dim hs As HScrollBar
Dim vs As VScrollBar

For Each c As Control In DataGrid1.Controls
If c.GetType() Is GetType(VScrollBar) Then
vs = CType(c, VScrollBar)
vs.Left = DataGrid1.Width - vs.Width
​
End If​
If c.GetType() Is GetType(HScrollBar) Then
hs = CType(c, HScrollBar)
hs.Top = DataGrid1.Height - hs.Height
​
End If​
Next
DataGrid1.Refresh()


though the post is old, someone else might need it
:)
 
Last edited:
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