Scroll bar problems with Datagrid inside TabControl

[bob01900]

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.

[bob01900]

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

[nirubhai]

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

:)

Edited June 17, 2005 by nirubhai