WPF：总是触发 SizeChanged

Question

我使用 ResponsiveGrid 制作动态页面并设置 SizeChanged 事件以更改按钮的位置。但是 SizeChanged 总是被触发使 windows 闪烁，并且 SizeChanged 事件无法停止，这是我在 .cs

中的代码

 private void Condition_SizeChanged(object sender, EventArgs e)
        {
            if (ActualWidth > 1480)
            {
                Col1.Height = new GridLength(100.0, GridUnitType.Star);
                Col2.Height = new GridLength(1.0, GridUnitType.Star);
                Row1.Width = new GridLength(5.0, GridUnitType.Star);
                Row2.Width = new GridLength(1.0, GridUnitType.Star);

                CommonButtonSearch.SetValue(Grid.ColumnProperty, 1);
                CommonButtonSearch.SetValue(Grid.RowProperty, 0);

                CommonButtonSearch.Margin = new Thickness(30, (ActualHeight - 32) / 2, 0, (ActualHeight - 32) / 2);

            }
            else
            {
                Row1.Width = new GridLength(100.0, GridUnitType.Star);
                Row2.Width = new GridLength(1.0, GridUnitType.Star);
                Col1.Height = new GridLength(5.0, GridUnitType.Star);
                Col2.Height = new GridLength(1.0, GridUnitType.Star);

                CommonButtonSearch.SetValue(Grid.ColumnProperty, 0);
                CommonButtonSearch.SetValue(Grid.RowProperty, 1);

                CommonButtonSearch.Margin = new Thickness((ActualWidth - 120) / 2, 30, (ActualWidth - 120) / 2, 30);
            }
        }

Answer 1

每当更改大小时都会引发该事件，这可能在您在代码中设置行和列的 Width 和 Height 属性时发生。

您可能希望在执行代码时使用变量来“暂停”引发事件：

private bool _handle = true;
private void Condition_SizeChanged(object sender, EventArgs e)
{
    if (!_handle)
        return;

    _handle = false;
    if (ActualWidth > 1480)
    {
        Col1.Height = new GridLength(100.0, GridUnitType.Star);
        Col2.Height = new GridLength(1.0, GridUnitType.Star);
        Row1.Width = new GridLength(5.0, GridUnitType.Star);
        Row2.Width = new GridLength(1.0, GridUnitType.Star);

        CommonButtonSearch.SetValue(Grid.ColumnProperty, 1);
        CommonButtonSearch.SetValue(Grid.RowProperty, 0);

        CommonButtonSearch.Margin = new Thickness(30, (ActualHeight - 32) / 2, 0, (ActualHeight - 32) / 2);

    }
    else
    {
        Row1.Width = new GridLength(100.0, GridUnitType.Star);
        Row2.Width = new GridLength(1.0, GridUnitType.Star);
        Col1.Height = new GridLength(5.0, GridUnitType.Star);
        Col2.Height = new GridLength(1.0, GridUnitType.Star);

        CommonButtonSearch.SetValue(Grid.ColumnProperty, 0);
        CommonButtonSearch.SetValue(Grid.RowProperty, 1);

        CommonButtonSearch.Margin = new Thickness((ActualWidth - 120) / 2, 30, (ActualWidth - 120) / 2, 30);
    }
    _handle = true;
}

WPF：总是触发 SizeChanged

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