在 WPF 程序中，我想更改“画布”上所有“线条”的描边颜色
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时间：2020-09-13 11:13:50 来源:igfitidea点击:
In a WPF Program, I want to change the Stroke Color on all the "Lines" on a "Canvas"
提问by user3130331
I have a bunch of lines on a canvas. I want to iterate through the Lines and turn their Stroke colors to black.
我在画布上有一堆线条。我想遍历线条并将它们的描边颜色变成黑色。
The line of code in the foreach loop won't compile.
foreach 循环中的代码行不会编译。
foreach (FrameworkElement Framework_Element in My_Canvas.Children)
{
//the following line of code won't compile.
(Line)Framework_Element.Stroke = new SolidColorBrush(Colors.Black);
}
回答by Walt Ritscher
You are missing a pair of parenthesis.
您缺少一对括号。
foreach (FrameworkElement Framework_Element in My_Canvas.Children)
{
// tries to find .Stroke on the FrameworkElement class
// (Line)Framework_Element.Stroke
// correct way
((Line)Framework_Element).Stroke = new SolidColorBrush(Colors.Black);
// or
var currentLine = (Line)Framework_Element;
currentLine.Stroke = new SolidColorBrush(Colors.Black);
}
