在DataGridView中看不到DatePicker列的标题文本

Question

I have three DateTime Picker columns in my DataGridView which I was able to achieve from this..

How to: Host Controls in Windows Forms DataGridView Cells

When I add only one Column of this type like this..

Dim col As New CalendarColumn()
        col.HeaderText = "Date"
        col.Name = "Date"
        Me.DataGridView1.Columns.Add(col)

It works fine. But when I add multiple columns like..

 Dim col1 As New CalendarColumn()
    col.HeaderText = "Pledge Expiry Date"
    col.Name = "PledgeExpiryDate"
    Me.DataGridView1.Columns.Add(col1)

    Dim col2 As New CalendarColumn()
    col.HeaderText = "Security Maturity Date"
    col.Name = "SecurityMaturityDate"
    Me.DataGridView1.Columns.Add(col2)

I am able to see the Header text of only the Security Maturity Date rest of the two columns do not display their header text.

Answer 1

You missed out Something

While adding second and third column you used same object name to assign Header Text and Name

col.HeaderText = "Pledge Expiry Date"
col.Name = "PledgeExpiryDate"

col.HeaderText = "Security Maturity Date"
col.Name = "SecurityMaturityDate"

Make Correction as

col1.HeaderText = "Pledge Expiry Date"
col1.Name = "PledgeExpiryDate"

col2.HeaderText = "Security Maturity Date"
col2.Name = "SecurityMaturityDate"