C# 通过单击表单按钮更改在公共类中创建的标签
很难理解类以及为什么我无法访问某些对象。 我如何修改代码以便可以更改所有类/事件中的“地图”（这是一堆标签）属性？
Draw2d() 方法在主窗体上创建了几个标签，我希望在不同的事件上更改这些标签（在本例中单击按钮）。
有人可以帮助我，或者只是提示我正确的方向。
代码：
公共部分类Form1：表格
{
public void Draw2d()
{
const int spacing = 20;
Label[][] map = new Label[5][];
for (int x = 0; x < 5; x++)
{
map[x] = new Label[5];
for (int y = 0; y < 5; y++)
{
map[x][y] = new Label();
map[x][y].AutoSize = true;
map[x][y].Location = new System.Drawing.Point(x * spacing, y * spacing);
map[x][y].Name = "map" + x.ToString() + "," + y.ToString();
map[x][y].Size = new System.Drawing.Size(spacing, spacing);
map[x][y].TabIndex = 0;
map[x][y].Text = "0";
}
this.Controls.AddRange(map[x]);
}
}
public Form1()
{
InitializeComponent();
}
public void Form1_Load(object sender, EventArgs e)
{
Draw2d();
}
private void button1_Click(object sender, EventArgs e)
{
map[0][0].Text = "1"; // <-- Doesn't work
}
}
谢谢！
Having hard time understanding classes and why I can't access certain object.
How can i modify the code so I can change "map"(which is a bunch of labels) properties in all of my classes/events?
The method Draw2d() creates a couple of labels on the main form that I wish to change on different events(button click in this example).
Can someone help me, or just hint me into the right direction.
The Code:
public partial class Form1 : Form
{
public void Draw2d()
{
const int spacing = 20;
Label[][] map = new Label[5][];
for (int x = 0; x < 5; x++)
{
map[x] = new Label[5];
for (int y = 0; y < 5; y++)
{
map[x][y] = new Label();
map[x][y].AutoSize = true;
map[x][y].Location = new System.Drawing.Point(x * spacing, y * spacing);
map[x][y].Name = "map" + x.ToString() + "," + y.ToString();
map[x][y].Size = new System.Drawing.Size(spacing, spacing);
map[x][y].TabIndex = 0;
map[x][y].Text = "0";
}
this.Controls.AddRange(map[x]);
}
}
public Form1()
{
InitializeComponent();
}
public void Form1_Load(object sender, EventArgs e)
{
Draw2d();
}
private void button1_Click(object sender, EventArgs e)
{
map[0][0].Text = "1"; // <-- Doesn't work
}
}
Thanks!
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评论（2）
您必须将映射声明为属性（全局到类）
然后您可以在类内部使用
或从外部使用
you have to declare the map as property(global to class)
then you can use inside class like
or from outside like
我的猜测是您添加了
但忘记将 Draw2d 的第二行从 更改为
我
刚刚尝试了您的代码，如果您更改这两行，它就可以正常工作。如果这不是问题，您能说出您遇到的错误吗？
My guess is that you added
but forgot to change the second line of Draw2d from
to
I just tried your code, and it works fine if you change those two lines. If that's not the problem, could you say what error you're getting, please?