效果

实现

代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp6 {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }

        /// <summary>
        /// 当点击时弹出字体对话框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e) {
            FontDialog fontDialog = new FontDialog();
            fontDialog.ShowDialog();

            //把在对话框中选中的字体赋值给文本框的字体
            textBox1.Font = fontDialog.Font;
        }

        /// <summary>
        /// 弹出颜色对话框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e) {
            ColorDialog colorDialog = new ColorDialog();
            colorDialog.ShowDialog();

            //把在对话框中选择的颜色赋值给文本框中文本的颜色
            textBox1.ForeColor = colorDialog.Color;
        }
    }
}

36.winform之字体对话框和颜色对话框

原文：https://www.cnblogs.com/lz32158/p/12976747.html