Hi Simchajoy.
I think that this complete sample will help you, you can open a windoform
project and just paste it in, than add 3 buttons and a datagrid on that
form.
I hope this helps?
Cor
'\\\needs a datagrid and 3 buttons on a form
Dim ds As New DataSet("Test")
Private Sub Form1_Load(ByVal sender As Object, ByVal e _
As System.EventArgs) Handles MyBase.Load
Me.Button1.Text = "Read ds"
Me.Button2.Text = "Write ds"
Me.Button3.Text = "New ds"
End Sub
Private Sub FillGrid()
Static done As Boolean
If Not done Then
Dim dv As New DataView(ds.Tables(0))
dv.AllowNew = False
DataGrid1.DataSource = dv
Dim ts As New DataGridTableStyle
ts.MappingName = "Names"
Dim textCol As New DataGridTextBoxColumn
textCol.MappingName = "IdName"
textCol.HeaderText = "Id"
textCol.Width = 20
ts.GridColumnStyles.Add(textCol)
textCol = New DataGridTextBoxColumn
textCol.MappingName = "Name"
textCol.HeaderText = "Name"
textCol.Width = 120
ts.GridColumnStyles.Add(textCol)
Dim cmbTxtCol As New DataGridComboBoxColumn
cmbTxtCol.MappingName = "Country"
cmbTxtCol.HeaderText = "Countries"
cmbTxtCol.Width = 100
ts.GridColumnStyles.Add(cmbTxtCol)
ts.PreferredRowHeight = (cmbTxtCol.ColumnComboBox.Height + 3)
cmbTxtCol.ColumnComboBox.Items.Add("Austria(EU)")
cmbTxtCol.ColumnComboBox.Items.Add("Germany(EU)")
cmbTxtCol.ColumnComboBox.Items.Add("Holland(EU)")
cmbTxtCol.ColumnComboBox.Items.Add("UK(EU)")
cmbTxtCol.ColumnComboBox.Items.Add("Georgia(US)")
cmbTxtCol.ColumnComboBox.Items.Add("NewYork(US)")
cmbTxtCol.ColumnComboBox.DropDownStyle =
ComboBoxStyle.DropDownList
DataGrid1.TableStyles.Add(ts)
done = True
End If
End Sub
'make dataset
Private Sub Button3_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button3.Click
ds.Tables.Clear()
Dim dt As New DataTable("Names")
ds.Tables.Add(dt)
dt.Columns.Add("IdName")
dt.Columns.Add("Name")
dt.Columns.Add("Country")
For i As Integer = 1 To 6
Dim dr As DataRow = dt.NewRow
dr(0) = i.ToString
dt.Rows.Add(dr)
Next
dt.Rows(0)(1) = "Herfried K. Wagner"
dt.Rows(1)(1) = "Armin Zingler"
dt.Rows(2)(1) = "Ken Tucker"
dt.Rows(3)(1) = "Terry Burns"
dt.Rows(4)(1) = "Jay B Harlow"
dt.Rows(5)(1) = "Cor Ligthert"
dt.Rows(0)(2) = "Austria(EU)"
dt.Rows(1)(2) = "Germany(EU)"
dt.Rows(2)(2) = "Georgia(US)"
dt.Rows(3)(2) = "UK(EU)"
dt.Rows(4)(2) = "New York(US)"
dt.Rows(5)(2) = "Holland(EU)"
FillGrid()
End Sub
'Read dataset
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
Dim fo As New OpenFileDialog
If fo.ShowDialog() = DialogResult.OK Then
ds.Clear()
ds.ReadXml(fo.FileName)
FillGrid()
Else
Me.Close()
End If
End Sub
'write dataset
Private Sub Button2_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button2.Click
Dim of As New SaveFileDialog
If of.ShowDialog = DialogResult.OK Then
ds.WriteXml(of.FileName)
End If
End Sub
End Class
' The simple DatagridCombobox
Public Class DataGridComboBoxColumn
Inherits DataGridTextBoxColumn
Public WithEvents ColumnComboBox As NoKeyUpCombo 'special class
Private WithEvents cmSource As CurrencyManager
Private mRowNum As Integer
Private isEditing As Boolean
Shared Sub New()
End Sub
Public Sub New()
MyBase.New()
ColumnComboBox = New NoKeyUpCombo
AddHandler ColumnComboBox.SelectionChangeCommitted, _
New EventHandler(AddressOf ComboStartEditing)
End Sub
Protected Overloads Overrides Sub Edit(ByVal source As CurrencyManager,
_
ByVal rowNum As Integer, ByVal bounds As Rectangle, ByVal readOnly1 As
Boolean, _
ByVal instantText As String, ByVal cellIsVisible As Boolean)
MyBase.Edit(source, rowNum, bounds, readOnly1, instantText,
cellIsVisible)
mRowNum = rowNum
cmSource = source
ColumnComboBox.Parent = Me.TextBox.Parent
ColumnComboBox.Location = Me.TextBox.Location
ColumnComboBox.Size = New Size(Me.TextBox.Size.Width,
ColumnComboBox.Size.Height)
ColumnComboBox.Text = Me.TextBox.Text
TextBox.Visible = False
ColumnComboBox.Visible = True
ColumnComboBox.BringToFront()
ColumnComboBox.Focus()
End Sub
Protected Overloads Overrides Function Commit(ByVal dataSource As _
CurrencyManager, ByVal rowNum As Integer) As Boolean
If isEditing Then
isEditing = False
SetColumnValueAtRow(dataSource, rowNum, ColumnComboBox.Text)
End If
Return True
End Function
Private Sub ComboStartEditing(ByVal sender As Object, ByVal e As
EventArgs)
isEditing = True
MyBase.ColumnStartedEditing(DirectCast(sender, Control))
End Sub
Private Sub LeaveComboBox(ByVal sender As Object, ByVal e As EventArgs)
_
Handles ColumnComboBox.Leave
If isEditing Then
SetColumnValueAtRow(cmSource, mRowNum, ColumnComboBox.Text)
isEditing = False
Invalidate()
End If
ColumnComboBox.Hide()
End Sub
End Class
Public Class NoKeyUpCombo
Inherits ComboBox
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
If m.Msg <> &H101 Then
MyBase.WndProc(m)
End If
End Sub
///
