Delete Row / Remove Row - vb.net

Question

I want to delete my rows in gridview, but when I try many code the error are same.
When I try this
Using sqlCon As New SqlConnection(PyrDLL.Koneksi.ConnectionString)
Using cmd As New SqlCommand()
cmd.CommandText = "xyz"
cmd.Connection = sqlCon
sqlCon.Open()
Dim da As New SqlDataAdapter(cmd)
Dim dt As New DataTable()
da.Fill(dt)
Gridview1.DataSource = dt
Gridview1.DataBind()
sqlCon.Close()
If Gridview1.Rows.Count = 0 Then
Dim dtempty As DataTable = Nothing
dtempty = (DirectCast(Gridview1.DataSource, DataTable)).Clone()
dtempty.Rows.Add(dtempty.NewRow())
Gridview1.DataSource = dtempty
Gridview1.DataBind()
Gridview1.Rows(0).Visible = False
'Gridview1.Rows(0).Controls.Clear()
Else
For i As Integer = 0 To dt.Rows.Count - 1
dt.Rows(i)("rupiah") = PyrDLL.Decrypt(dt.Rows(i)("rupiah"))
dt.Rows(i)("rupiah") = Decimal.Parse(dt.Rows(i)("rupiah")).ToString()
'i = i + 1
Next
Gridview1.DataBind()
For i As Integer = Gridview1.Rows.Count - 1 To 1 Step -1
Dim row As GridViewRow = Gridview1.Rows(i)
Dim prevrow As GridViewRow = Gridview1.Rows(i - 1)
If (TryCast(Gridview1.Rows(i).Cells(1).FindControl("lblketerangan"), Label).Text.ToString() = TryCast(Gridview1.Rows(i - 1).Cells(1).FindControl("lblketerangan"), Label).Text.ToString()) And (TryCast(Gridview1.Rows(i).Cells(0).FindControl("lblcomp"), Label).Text.ToString() = TryCast(Gridview1.Rows(i - 1).Cells(0).FindControl("lblcomp"), Label).Text.ToString()) Then
Dim total As Integer = Convert.ToDecimal(TryCast(Gridview1.Rows(i - 1).Cells(2).FindControl("lblrupiah"), Label).Text)
Dim total2 As Integer = Convert.ToDecimal(TryCast(Gridview1.Rows(i).Cells(2).FindControl("lblrupiah"), Label).Text)
Dim total3 As Decimal
total3 = total + total2
DirectCast(Gridview1.Rows(i - 1).Cells(2).FindControl("lblrupiah"), Label).Text = Decimal.Parse(total3).ToString()
row.Visible = False
'Gridview1.Rows.Remove(Gridview1.Rows(i)) <--- if i comment here its run without problem
End If
Next
End If
End Using
End Using
the error
Remove' is not a member of 'System.Web.UI.WebControls.GridViewRowCollection'
Can you help me?
now, i hide the row after i sum it but i want to auto delete / remove row after i sum it not only hide
Thanks

Answer 1

I am not sure what you are trying to do when there are no rows, the gridview would be empty
You should do the following instead:
'Call GetData() every time you want to bind data to the gridview
Private Function GetData()
Gridview1.DataSource = Nothing
Gridview1.DataBind()
Dim strQuery = "SELECT..."
Dim dt As New DataTable()
Using sqlCon As New SqlConnection(PyrDLL.Koneksi.ConnectionString)
Using cmd As New SqlCommand(strQuery, sqlCon)
'Add cmd parameters as required to prevent SqlInjection
sqlCon.Open()
Using ada As New SqlDataAdapter(cmd)
ada.Fill(dt)
Gridview1.DataSource = dt
Gridview1.DataBind()
End Using
End Using
End Using
End Function
When handling the data in the gridview you can use RowDataBound, you could then call a separate function to handle deleting a row after your logic is handled where the criteria is met to delete a row
Protected Sub Gridview1_RowDataBound(sender As Object, e As GridViewRowEventArgs) Handles Gridview1.RowDataBound
If e.Row.RowType = DataControlRowType.DataRow Then
'Handle databound logic
End If
End Sub
You should be able to tailor this to your needs, just called GetData() everytime you need to rebind data to the gridview

Answer 2

I solved my problem
i cant remove rows from data gridview but i remove data from data table and bind it after thats
thanks everyone