窗体：禁用DataGridView上的自动滚动

Question

我有一个DataGridView，我不断填充添加行BackgroundWorker。

问题是，即使在DataGridView的底部添加了每一行，滚动条仍继续向上移动，而不是在我之前移动它的相同位置上保持 。

我怎样才能禁用自动滚动保持DataGridView在同一地点，而新的行添加在底部？

Answer 1

我通常这样做有ListView，我相信一个DataGridView将同样的工作：

If ListView1.Items.Count > 0 Then 

    ListView1.Items.Item(ListView1.Items.Count -1).EnsureVisible() 

End If 

这将确保您的最后一个条目是可见的。

Answer 2

您可以使用DataGridView1_Scroll获取特定滚动位置的事件。像下面 -

Dim savedScrollPosition As Integer = 0 
    Private Sub DataGridView1_Scroll(sender As Object, e As System.Windows.Forms.ScrollEventArgs) Handles DataGridView1.Scroll 
    savedScrollPosition = e.NewValue 
End Sub 

然后你就可以添加新行后分配这DataGridView的财产FirstDisplayedScrollingRowIndex。像下面 -

Public Class Form1 

Dim i As Integer = 1 
Dim savedScrollPosition As Integer = 0 

Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load 
    Dim timer As New Timer() 
    timer.Interval = 1000 
    AddHandler timer.Tick, AddressOf timer_Tick 
    timer.Start()  
End Sub 

Private Sub timer_Tick(ByVal sender As Object, ByVal e As EventArgs) 
    UpdateDGV() 
    i = i + 1 
End Sub 

Private Sub UpdateDGV() 
    DataGridView1.ColumnCount = 2 
    DataGridView1.Columns(0).Name = "Product_Name" 
    DataGridView1.Columns(1).Name = "Product_Price" 

    Dim row As String() = New String() {"Product # " + Convert.ToString(i), 1000 + i} 
    DataGridView1.Rows.Add(row) 

    'Keep your scrollbar at specific position 
    DataGridView1.FirstDisplayedScrollingRowIndex = savedScrollPosition 

    'keep your scrollbar at bottom of the grid 
    'DataGridView1.FirstDisplayedScrollingRowIndex = DataGridView1.RowCount - 1 

End Sub 

Private Sub DataGridView1_Scroll(sender As Object, e As System.Windows.Forms.ScrollEventArgs) Handles DataGridView1.Scroll 
    savedScrollPosition = e.NewValue 
End Sub 
End Class