[英]How can I create a self-incrementing column for a DataGridView?
我需要向 DataGridView 添加一个自增列。 每次向网格中添加一行时,我都想增加No
列。
我的Form_Load
代码:
Private Sub SAP_OrdenVenta_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
DataGridView1.ColumnCount = 6
DataGridView1.Columns(0).Name = ("No")
DataGridView1.Columns(1).Name = ("NoArticulo")
DataGridView1.Columns(2).Name = ("Descripcion")
DataGridView1.Columns(3).Name = ("Cantidad")
DataGridView1.Columns(4).Name = ("Precio")
DataGridView1.Columns(5).Name = ("Total")
End Sub
添加按钮的 DataGridView 按钮单击事件:
Private Sub btnAgregar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAgregar.Click
Dim articulo, cantidad As Integer
Dim precio, total1 As Double
Dim i As Integer = 0
articulo = txtArticulo.Text.Trim()
cantidad = txtCantidad.Text.Trim()
precio = txtPrecio.Text.Trim()
total1 = txtPrecio.Text.Trim()
'Agrego Linea a DataGridView
Dim row As String() = New String() {1, articulo, "No disponible", cantidad, precio, total1}
DataGridView1.Rows.Add(row)
End Sub
我怎样才能使这项工作?
Private Sub btnAgregar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAgregar.Click
Dim LastIndex As Integer = DataGridView1.Rows.Count - 1
Dim LastNo As Integer = Integer.Parse(DataGridView1.Rows(LastIndex).Cells(0).Value)
Dim NewNo As String = (LastNo + 1).ToString()
Dim row As String() = New String() {NewNo, txtArticulo.Text, "No disponible", txtCantidad.Text, txtPrecio.Text, txtPrecio.Text}
DataGridView1.Rows.Add(row)
End Sub
但是请注意:如果此视图是从真实的数据库表加载的,您几乎总是希望依靠数据库生成 ID 值的能力。 否则,这是一个等待爆发的巨大竞争条件。
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