hi friends
i create a new class that inherits datagridview . my main purpose is to add a new property to all columns of this new datagridview .
my professor want that i do this in the form below . i explain to you all the steps and my problem :
1- i create a new class of DatagridviewColumns :
2- i create a new class inherits of datagridview :
3- now i add it to my form in runtime and add on example column to it :
but it dont work . form is load and a datagridview with no column is appear . what and where is the problem?
i create a new class that inherits datagridview . my main purpose is to add a new property to all columns of this new datagridview .
my professor want that i do this in the form below . i explain to you all the steps and my problem :
1- i create a new class of DatagridviewColumns :
Code:
Public Class MyDatagridviewColumn
Inherits DataGridViewColumn
Dim MName As String
Public Property MyNewProperty As String
Get
Return MName
End Get
Set(ByVal value As String)
MName = value
End Set
End Property
End ClassCode:
Public Class MyDatagriedview
Inherits DataGridView
Dim C1 As MyDatagridviewColumn
Dim CC1 As DataGridViewColumnCollection
Public Shadows Property Columns(ByVal Index As Integer) As MyDatagridviewColumn
Get
Return C1
End Get
Set(ByVal value As MyDatagridviewColumn)
C1 = value
End Set
End Property
Public Shadows Property Columns As DataGridViewColumnCollection
Get
Return CC1
End Get
Set(ByVal value As DataGridViewColumnCollection)
CC1 = value
End Set
End Property
Public Sub Initialize()
C1 = New MyDatagridviewColumn
CC1 = New DataGridViewColumnCollection(Me)
End Sub
Sub New()
Initialize()
End Sub
End ClassCode:
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim mdgv As New MyDatagriedview
mdgv.Columns.Add("c1", "c2")
Me.Controls.Add(mdgv)
End Sub
End Classbut it dont work . form is load and a datagridview with no column is appear . what and where is the problem?