Динамическое создание столбцов и добавление строк в datagridview

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Hello All,

             i have a query regarding add rows dynamically in datagridview .I need to have a datagridview which contains 4 columns as follows:

Column headers : Test1 ,Test2, Test3, Test4 (Creation of columns  is also dynamic)

Test1 ,Test2 and Test3 are of type DataGridViewComboBoxColumn  and Test4 of type DataGridViewTextBoxColumn 


Example: Suppose i have 4 rows in datagridview everytime the 1 and last row(4) under Test1  should have combo box items same and 2nd and 3rd have same data 


Test1            Test2                            Test3                           Test4

items(1,2)      items(5,5)                      items(6,7)                   first
items(4,5)      items(5,5)                      items(6,7)                   first
items(4,5)      items(5,5)                      items(6,7)                   first
items(1,2)      items(5,5)                      items(6,7)                   first

Please help me in this regard.

Thanks & Regards,
Sampath

Что я уже пробовал:

'DataGridView1.Строк.Добавить()

'Dim cmb как новый DataGridViewComboBoxColumn()
'Dim cmb1 как новый DataGridViewComboBoxColumn()
'Dim cmb2 как новый DataGridViewComboBoxColumn()
'Dim txtbox As New DataGridViewTextBoxColumn()
'Dim cmbOthers As New DataGridViewComboBoxColumn()

'Для i = от 0 до 3

- cmb.HeaderText = " Выбрать Данные"
- cmb.Имя = " cmb"
'cmb. MaxDropDownItems = 4
- cmb.Предметы.Добавить("1/3")
- cmb.Предметы.Добавить("1/2")
'DataGridView1.Столбцы.Добавить (cmb)

- cmb1.HeaderText = " Select Data1"
- cmb1.Имя = " cmb1"
'cmb1. MaxDropDownItems = 4
- cmb1.Предметы.Добавить("Правда")
- cmb1.Предметы.Добавить("Ложные")
'DataGridView1.Столбцы.Добавить (cmb1)

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