我可以通过名称找到Control，但是如何按名称查找OvalShape

Question

我正在尝试选择一个不是Control - OvalShape的东西。

这可以找到一个按钮

string y = "btn_down_" + x;
Button button = this.Controls.Find(y, true)[0] as Button;

我怎么能做同样的事情来找到一个OvalShape例如:(这显然不起作用）

string y = "ovalShape_" + x;
OvalShape light = this.Controls.Find(y, true)[0] as OvalShape;

_____解_____

string z = "ovalShape" + (21-x);
OvalShape light = shapeContainer2.Shapes.OfType<OvalShape>().FirstOrDefault(ov =>    ov.Name == z);

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Answer 1

从docs我看到在ShapeContainer上首先添加了一个Shape，它只是一个容器控件。

然后，ShapeContainer有一个名为Shapes的属性，其类型为ShapeCollection，并公开列表方法，如Contains。

假设你已经像这样设置了所有内容：

 Microsoft.VisualBasic.PowerPacks.ShapeContainer canvas = 
    new Microsoft.VisualBasic.PowerPacks.ShapeContainer();
 Microsoft.VisualBasic.PowerPacks.OvalShape oval1 = 
    new Microsoft.VisualBasic.PowerPacks.OvalShape();
 // Set the form as the parent of the ShapeContainer.
 canvas.Parent = this;

for(int i =0;i < canvas.Count; i++)
{
  var shape = (Shape)canvas.Item[i];
   //now check if shape is your oval by looking at it's properties.
}

//You could also do this:
// (But this means you have to store a reference to your shape somewhere
// as some sort of global, not very good design.)
OvalShape myShape = ..
int index = canvas.IndexOf(myShape);
canvas.Item[index];//returns your shape.

如果您使用for循环方法，则可以检查形状的Name属性。您也可以使用Tag属性;将代码设置为"OvalShape"，然后在循环中检查：if(shape.Tag == "OvalShape") {..。

Answer 2

根据@ gideon的回答中提供的一些链接，你可以这样试试：

首先获取默认的ShapeContainer，然后在类型为OvalShape且名称等于y的容器内搜索形状。

string y = "ovalShape_" + x;
var shapeContainer = this.Controls.OfType<ShapeContainer>().FirstOrDefault();
OvalShape light = shapeContainer.Shapes.OfType<OvalShape>().FirstOrDefault(o => o.Name == y);

此代码对我来说很好，但将OvalShape拖到表单后生成的名称类似于"ovalShape" + x而不是"ovalShape_" + x。