在listview WPF中计算总计 [英] Calculating total in a listview WPF

问题描述

所以，我有一个列表视图，我想在列表视图中添加所有小数，并在标签中显示总数。



理想情况下我希望每次更新列表视图时更新总数（在标签中）。但是现在我只想在标签上显示一个工作总计。



由于我在WPF工作，SubItems无法工作，我试图寻找解决方案在它周围，但我完全不知所措。



我试过这个。

So, i have a list view, and i want to add all of the decimals inside of the listview and display the total in a label.

Ideally i want the total (in the label) to be updated each time the listview is updated. But right now i just want a working total to be displayed in the label.

Since im working in WPF the SubItems doesnt work, i've tried looking for the solutions around it but i get completely overwhelmed by what i find.

I've tried this.

private void Button_Click_1(object sender, RoutedEventArgs e)
{

    decimal total = 0;

    foreach (ListViewItem lstViewItem in orderDetailsListView.Items)
    {

        foreach (ListViewItem o in orderDetailsListView.Items)
            total = total + Convert.ToDecimal(orderDetailsListView.Items.["Price"].Text);

        totalOutputLabel.Content = total;
    }
}

但它不起作用，因为标识符是预计在这里...项目。 [价格]





我知道它很简单，可以很快就会完成，但我搜索和搜索，我遇到的每个解决方案，无论是VB，winforms，数据网格还是我找到解决方案的难得机会，它不起作用，因为它们的部分代码不存在与我的一样。

But it doesnt work, because an identifier is expected here...Items.["Price"]


I know its so simple and can be done in no time, but i've searched and search and every solution i have come across, is either VB, winforms, datagrids and the rare chance i find a solution for mine, it doesnt work due to parts of their code not being the same as mine.

推荐答案

我的建议是创建一个从wpf ListView派生的CustomListView控件，并覆盖OnItemsChanged受保护的方法。



https://msdn.microsoft.com/en-us/library/system.windows.controls.listview.onitemschanged(v = vs.110）.aspx [ ^ ]



在这里你可以验证NotifyCollectionChangedEventArgs Action属性以查看是否添加了一个项目，删除，替换或重置并添加逻辑以计算总数（如有必要）。



https://msdn.microsoft.com/en-us/library/system.collections.specialized.notifycollectionchangedaction（v = VS。 110）.aspx [ ^ ]

My suggestion would be to create a CustomListView control that is derived from the wpf ListView and override the OnItemsChanged protected method.

https://msdn.microsoft.com/en-us/library/system.windows.controls.listview.onitemschanged(v=vs.110).aspx[^]

Here you can verify NotifyCollectionChangedEventArgs Action property to see if a item was added, removed, replaced or reset and add the logic for calculating the total if necessary.

https://msdn.microsoft.com/en-us/library/system.collections.specialized.notifycollectionchangedaction(v=vs.110).aspx[^]

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