Vb.net 选定行数据网格和单元格

我有

gridview

用于发票需求和单元格

Number     Description      Price     Qty    Total     Discount    Grand Total
5050       Screen           50        1      50        5           45
6060       Case             100       2      200       50          150

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当我更改

价格

、

数量

或

折扣

的值时，我需要它来动态计算总计和总计。

我做了一个小例子来说明您的需求（），因此：

• 使用属性，以便数据绑定可以正确使用代码

  Private _description As String
  
  Public Property Description() As String
      Get
          Return Me._description
      End Get
      Set(ByVal value As String)
          If Not (value = Me._description) Then
              Me._description = value
              Me.NotifyPropertyChanged()
          End If
      End Set
  End Property
  

• 用于更新表单和其他结构

  Public MustInherit Class BusinessObject
      Implements INotifyPropertyChanged
  
      Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged
  
      Protected Sub NotifyPropertyChanged(<CallerMemberName()> Optional ByVal propertyName As String = Nothing)
          RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(propertyName))
      End Sub
  
  End Class
  

• 向表单对象添加数据绑定

  Me._binding = New BindingSource()
  Me._binding.DataSource = New Shop()
  Me._binding.DataMember = "ShopItems"
  
  Me.ShopItemsDataGridView.DataSource = Me._binding
  Me.ShopItemsDataGridView.AutoGenerateColumns = True
  

使用这些方法，您将能够自动重新计算总数并更新表单

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如果您需要更多信息，请在谷歌上搜索WinForms数据绑定或类似功能。

很抱歉，当我更改任何值total=price*qtygrand total=total折扣时，我希望每个单元格都能更新

Me._binding = New BindingSource()
Me._binding.DataSource = New Shop()
Me._binding.DataMember = "ShopItems"

Me.ShopItemsDataGridView.DataSource = Me._binding
Me.ShopItemsDataGridView.AutoGenerateColumns = True