如何在WPF中获得动态添加的控件的位置？

Question

我在获取运行时动态添加按钮的位置时遇到了问题。 请找到下面的代码。

foreach (string subfolder in Directory.GetDirectories(path))
        {
            Button btnSubfolder = new Button();
            btnSubfolder.Name = "btnsubfolder" + column.ToString();
            btnSubfolder.Content = subfolder.Substring(subfolder.LastIndexOf("\\") + 1);
            btnSubfolder.Margin = new Thickness(15, 15, 10, 0);
            btnSubfolder.Width = 200;
            btnSubfolder.Height = 50;
            btnSubfolder.HorizontalAlignment = HorizontalAlignment.Left;
            btnSubfolder.SetValue(Grid.ColumnProperty, column);
            grdsbFolders.Children.Add(btnSubfolder);
            var location = btnSubFolder.PointToScreen(new Point(0, 0)); //here i am getting the same position for all the added controls;
        }

提前致谢。

Answer 1

在获取Button的实际位置之前，您需要测量并布置Grid ：

foreach (string subfolder in Directory.GetDirectories(path))
{
    Button btnSubfolder = new Button();
    btnSubfolder.Name = "btnsubfolder" + column.ToString();
    btnSubfolder.Content = subfolder.Substring(subfolder.LastIndexOf("\\") + 1);
    btnSubfolder.Margin = new Thickness(15, 15, 10, 0);
    btnSubfolder.Width = 200;
    btnSubfolder.Height = 50;
    btnSubfolder.HorizontalAlignment = HorizontalAlignment.Left;
    btnSubfolder.SetValue(Grid.ColumnProperty, column);
    grdsbFolders.Children.Add(btnSubfolder);

    grdsbFolders.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
    grdsbFolders.Arrange(new Rect());
    var location = btnSubfolder.TranslatePoint(new Point(0, 0), grdsbFolders);
}

Answer 2

在不指定列或行的情况下将控件添加到网格中会将它们全部定位在网格（0,0）中的同一位置。 使用另一个父控件以其他方式放置控件，或在网格中指定列和行。

使用StackPanel垂直或水平放置控件。 您也可以看看DockPanel

水平：

按钮 按钮 按钮

<StackPanel Orientation="Horizontal">
  <Button>Btn1</Button>
  <Button>Btn2</Button>
  <Button>Btn3</Button>
</StackPanel>

或垂直：

纽扣
纽扣
纽扣

<StackPanel Orientation="Vertical">
  <Button>Btn1</Button>
  <Button>Btn2</Button>
  <Button>Btn3</Button>
</StackPanel>