Adding rows to bottom of datagrid view

I have what should be a simple problem to fix.

I am trying to insert an initial line (0) into a datagridview (named params). The program will then read each cell in that row, pass them through a function and return values be placed into the next line (1). This will continue until one of the parameters reaches some set point.

The problem that I am having is that when I try to insert a new line, it appears above the initial one and not below it like I would like it to.

Here's my code so far:

Code:

Private Sub HurricaneWinds_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim init_xrange() As Double = New Double() {0.0, 0.0, 0.0, 40.0, 0.0}
 
       
        For i As Integer = 0 To 4
            params(i, 0).Value = init_xrange(i)
        Next
 
        Dim xx(4) As Double
        
 
        For j As Integer = 1 To 10
            Dim prange() As Double = New Double() {CDbl(DragCo.Text.Trim), CDbl(WindVelCoef.Text.Trim), CDbl(WindVelExp.Text.Trim), CDbl(Gravity.Text.Trim)}
            Dim xrange() As Double = New Double() {CDbl(params(0, j - 1).Value), CDbl(params(1, j - 1).Value), CDbl(params(2, j - 1).Value), CDbl(params(3, j - 1).Value), CDbl(params(4, j - 1).Value)}
            xx = rk4(CInt(NumTimesteps.Text.Trim), CDbl(TimeStep.Text.Trim), xrange, prange)
            
            Dim item As New DataGridViewRow
            item.CreateCells(params)
            With item
                .Cells(0).Value = xx(0)
                .Cells(1).Value = xx(1)
                .Cells(2).Value = xx(2)
                .Cells(3).Value = xx(3)
                .Cells(4).Value = xx(4)
            End With
            params.Rows.Add(item)
           
        Next
 
    End Sub

And a picture of the problem:

Attachment 87572

Any suggestions?

Thanks

Why not add the rows as follows where the DataGridView columns are predefined.

Code:

---

YourDataGridViewName.Rows.Add(New Object() {xx(1),xx(2),xx(3),xx(4)})

---

Quote:

---

Originally Posted by kevininstructor

Why not add the rows as follows where the DataGridView columns are predefined.

Code:

---

YourDataGridViewName.Rows.Add(New Object() {xx(1),xx(2),xx(3),xx(4)})

---

---

Mainly because I don't know how many rows are going to need to be created. Depending on the input parameters it could vary between 5 and hundreds.

My intention is to create a new row on the each time it goes through the For loop (which I will eventially convert to a 'do while' once this is working).

Quote:

---

Originally Posted by catoctinwx

Mainly because I don't know how many rows are going to need to be created. Depending on the input parameters it could vary between 5 and hundreds.

My intention is to create a new row on the each time it goes through the For loop (which I will eventially convert to a 'do while' once this is working).

---

The code I provided will add a row each time but what your code is doing is clearing cells because of CreateCells method.

I would suggest trying YourDataGridViewName.Rows.Add and if you have a great deal of rows or not use a try/finally as shown below

Code:

---

DataGridView1.SuspendLayout()
Try
    ' add rows
Finally
    DataGridView1.ResumeLayout()
End Try

---