如何在Visual Studio窗体表单设计中仅编辑所选文本的FontStyle？

Question

所以我在visual studio中编写脚本并设计一个小时间表，并添加了一些富文本编辑器，如粗体和斜体。但我只希望这些复选框影响突出显示的文本，而不是整个组框。

我尝试在.Font = new Font之前添加“Selected”或“Highlighted”，但没有结果。我是这个领域的初学者。

using System;
using System.Drawing;
using System.Windows.Forms;

namespace timetable
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void CheckBox1_CheckedChanged(object sender, EventArgs e)
        {
            if (checkBox1.Checked)
            {
                groupBox1.Font = new Font(this.Font, FontStyle.Bold);
            }
            else
            {
                groupBox1.Font = new Font(this.Font, FontStyle.Regular);
            }
            if (checkBox2.Checked)
            {
                groupBox1.Font = new Font(this.Font, FontStyle.Bold | FontStyle.Italic);
            }

        }

        private void CheckBox2_CheckedChanged(object sender, EventArgs e)
        {
            if (checkBox2.Checked)
            {
                groupBox1.Font = new Font(this.Font, FontStyle.Italic);
            }
            else
            {
                groupBox1.Font = new Font(this.Font, FontStyle.Regular);
            }
            if (checkBox1.Checked)
            {
                groupBox1.Font = new Font(this.Font, FontStyle.Bold | FontStyle.Italic);
            }
        }

        private void GroupBox1_Enter(object sender, EventArgs e)
        {

        }
    }
}

我只想通过复选框来编辑由光标突出显示的文本.This is why I am using a group box.

我知道这可能很烦人，但是你能告诉我如何在我的代码中实现foreach语句吗？喜欢我的整个代码？

添加这样的foreach之后：

using System;
using System.Drawing;
using System.Windows.Forms;

namespace timetable
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void CheckBox1_CheckedChanged(object sender, EventArgs e)
        {
            if (checkBox1.Checked)
            {
                foreach (Control ctrl in groupBox1.Controls)
                {
                    if (ctrl is RichTextBox)
                    {
                        RichTextBox box = ctrl as RichTextBox;
                        box.SelectionFont = new Font(box.SelectionFont, box.SelectionFont.Style | FontStyle.Bold);
                    }
                }
            }
            else
            {
                foreach (Control ctrl in groupBox1.Controls)
                {
                    if (ctrl is RichTextBox)
                    {
                        RichTextBox box = ctrl as RichTextBox;
                        box.SelectionFont = new Font(box.SelectionFont, box.SelectionFont.Style | FontStyle.Regular);
                    }
                }
            }
            if (checkBox2.Checked)
            {
                foreach (Control ctrl in groupBox1.Controls)
                {
                    if (ctrl is RichTextBox)
                    {
                        RichTextBox box = ctrl as RichTextBox;
                        box.SelectionFont = new Font(box.SelectionFont, box.SelectionFont.Style | FontStyle.Italic);
                    }
                }


            }

        }
    }
}

我有这个：System.NotImplementedException: 'The method or operation is not implemented.'这在设计师代码中突出显示：

 private void GroupBox1_Enter(object sender, EventArgs e)
        {
            throw new NotImplementedException();
        }

Answer 1

你在这些组框中有什么包含字体？您需要一个RichTextBox然后您可以使用以下更改所选字体...

private void CheckBox1_CheckedChanged(object sender, EventArgs e)
        {
            if (checkBox1.Checked)
            {
                richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, richTextBox1.SelectionFont.Style | FontStyle.Bold);
            }
            else
            {
                richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, richTextBox1.SelectionFont.Style | FontStyle.Regular);
            }
            if (checkBox2.Checked)
            {
                richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, richTextBox1.SelectionFont.Style | FontStyle.Italic);
            }

        }

添加：

根据评论你需要一个像这样的foreach循环给小组...

foreach(Control ctrl in groupBox1.Controls)
        {
            if(ctrl is RichTextBox)
            {
                RichTextBox box = ctrl as RichTextBox;
                box.SelectionFont = new Font(box.SelectionFont, box.SelectionFont.Style | FontStyle.Bold);
            }
        }

离开你......

private void CheckBox1_CheckedChanged(object sender, EventArgs e)
        {
            if (checkBox1.Checked)
            {
                foreach(Control ctrl in groupBox1.Controls)
        {
            if (ctrl is RichTextBox)
            {
                RichTextBox box = ctrl as RichTextBox;
                box.SelectionFont = new Font(box.SelectionFont, box.SelectionFont.Style | FontStyle.Bold);
            }
        }
            }
            else
            {
                foreach(Control ctrl in groupBox1.Controls)
        {
            if (ctrl is RichTextBox)
            {
                RichTextBox box = ctrl as RichTextBox;
                box.SelectionFont = new Font(box.SelectionFont, box.SelectionFont.Style | FontStyle.Regular);
            }
        }
            }
            if (checkBox2.Checked)
            {
                foreach(Control ctrl in groupBox1.Controls)
        {
            if (ctrl is RichTextBox)
            {
                RichTextBox box = ctrl as RichTextBox;
                box.SelectionFont = new Font(box.SelectionFont, box.SelectionFont.Style | FontStyle.Italic);
            }
        }


        }