如何使用标签更改带有该标签的多个项目的属性？

Question

我有多个 6 个按钮，当你点击每个按钮时，它们会改变它们的属性，并停用同一标签的其他属性。

我目前拥有的代码不使用标签，而且对于每次单击按钮都执行此操作非常冗长：

private void buttonBritishGas_Click(object sender, EventArgs e)
    {
        buttonBritishGas.FlatStyle = FlatStyle.Flat;
        buttonBritishGas.FlatAppearance.BorderSize = 3;
        buttonBritishGas.FlatAppearance.BorderColor = Color.Blue;

        buttonEDF.FlatStyle = FlatStyle.Standard;
        buttonEDF.FlatAppearance.BorderSize = 1;
        buttonEDF.FlatAppearance.BorderColor = Color.White;

        buttonEON.FlatStyle = FlatStyle.Standard;
        buttonEON.FlatAppearance.BorderSize = 1;
        buttonEON.FlatAppearance.BorderColor = Color.White;

        buttonNPower.FlatStyle = FlatStyle.Standard;
        buttonNPower.FlatAppearance.BorderSize = 1;
        buttonNPower.FlatAppearance.BorderColor = Color.White;

        buttonScottishPower.FlatStyle = FlatStyle.Standard;
        buttonScottishPower.FlatAppearance.BorderSize = 1;
        buttonScottishPower.FlatAppearance.BorderColor = Color.White;

        buttonSSE.FlatStyle = FlatStyle.Standard;
        buttonSSE.FlatAppearance.BorderSize = 1;
        buttonSSE.FlatAppearance.BorderColor = Color.White;

我使用的标签是"Supplier"，这是我目前尝试的代码：

private void buttonBritishGas_Click(object sender, EventArgs e)
    {

        buttonBritishGas.Tag = "SelectedSupplier";

        foreach (Control c in Controls)
        {
            if (c.Tag.Equals("SelectedSupplier"))
            {
                FlatStyle = FlatStyle.Flat;
                FlatAppearance etc...;
            }
        }

        foreach (Control c in Controls)
        {
            if (c.Tag.Equals("Supplier"))
            {
                FlatStyle = FlatStyle.Standard;
                FlatAppearance etc...;
            }
        }

感谢任何帮助！

已编辑：

private void ChangeStyleByTag(Control parent, string tag, object sender, EventArgs e)
    {

        foreach (Control c in parent.Controls)
        {
            if (c.Tag != null && c.Tag.Equals(tag))
            {
                Button b = (Button)sender;
                b.FlatStyle = FlatStyle.Flat;
                b.FlatAppearance.BorderSize = 3;
                b.FlatAppearance.BorderColor = Color.Blue;
            }
            else
            ChangeStyleByTag(c, tag);
        }
    }

    private void buttonBritishGas_Click(object sender, EventArgs e)
    {
        buttonBritishGas.Tag = "SelectedSupplier";
        ChangeStyleByTag(this."SelectedSupplier");
        ChangeStyleByTag(this."Supplier");
    }

Answer 1

您必须在表单的控制树中递归循环：

    private void ChangeStyleByTag(Control parent, string tag)
    {
        foreach (Control c in parent.Controls)
        {
            if (c.Tag!=null && c.Tag.Equals(tag))
            {
                (c as Button).FlatStyle = FlatStyle.Flat;
                (c as Button).FlatAppearance.BorderSize = 3;
                (c as Button).FlatAppearance.BorderColor = Color.Blue;
            }
            else
                ChangeStyleByTag(c, tag);
        }
    }

    private void buttonBritishGas_Click(object sender, EventArgs e)
    {

        ChangeStyleByTag(this, "SelectedSupplier");
        ChangeStyleByTag(this, "Supplier");
    }