winform 背景颜色渐变动效

【实例截图】

【核心代码】

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        Color blueColor = Color.FromArgb(71, 165, 221);//蓝色
        Color pinkColor = Color.FromArgb(255, 57, 95);//粉色
        Color orangeColor = Color.FromArgb(255, 181, 66);//橙色
        Color aquaColor = Color.FromArgb(85, 193, 193);//青色
        Color greenColor = Color.FromArgb(157, 187, 97);//绿色
        Color finalColor;
        int step = 7;
        int stepR, stepG, stepB;
        private void updateColor(Color endColor)
        {
            //Color backColor = BackColor;
            finalColor = endColor;
            //初始颜色
            int startR = BackColor.R;
            int startG = BackColor.G;
            int startB = BackColor.B;

            //终止颜色
            int endR = endColor.R;
            int endG = endColor.G;
            int endB = endColor.B;

            //步长
            stepR = (endR - startR) / step;
            stepG = (endG - startG) / step;
            stepB = (endB - startB) / step;

            label1.Text = "背景颜色："   startR.ToString()   "  "   startG.ToString()   "  "   startB.ToString();
            label2.Text = "终止颜色："   endR.ToString()   "  "   endG.ToString()   "  "   endB.ToString();
            label3.Text = "步长："   stepR.ToString()   "  "   stepG.ToString()   "  "   stepB.ToString();

        }

        private void button1_Click(object sender, EventArgs e)
        {
            updateColor(blueColor);
            timer1.Start();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            updateColor(pinkColor);
            timer1.Start();
            //label1.Text = "背景颜色："   BackColor.R.ToString()   "  "   BackColor.G.ToString()   "  "   BackColor.B.ToString();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            //BackColor = Color.FromArgb(85, 193, 193);
            updateColor(aquaColor);
            timer1.Start();
            //label1.Text = "背景颜色："   BackColor.R.ToString()   "  "   BackColor.G.ToString()   "  "   BackColor.B.ToString();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            //BackColor = Color.FromArgb(157, 187, 97);
            updateColor(greenColor);
            //timer1.Interval = 50;
            timer1.Start();
            //label1.Text = "背景颜色："   BackColor.R.ToString()   "  "   BackColor.G.ToString()   "  "   BackColor.B.ToString();
        }
        private void button5_Click(object sender, EventArgs e)
        {
            updateColor(orangeColor);
            timer1.Start();
            //BackColor = Color.FromArgb(255, 181, 66);
            //label1.Text = "背景颜色："   BackColor.R.ToString()   "  "   BackColor.G.ToString()   "  "   BackColor.B.ToString();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            int r = BackColor.R;
            int g = BackColor.G;
            int b = BackColor.B;

            r  = stepR;
            g  = stepG;
            b  = stepB;

            BackColor = Color.FromArgb(r, g, b);
            updateColor(finalColor);
            if (stepR == 0 && stepG == 0 && stepB == 0)
            {
                timer1.Stop();
                BackColor = finalColor;
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            BackColor = blueColor;
            //FormBorderStyle = FormBorderStyle.FixedDialog;
            //Location = new Point((Screen.PrimaryScreen.WorkingArea.Width - Width) / 2,(Screen.PrimaryScreen.WorkingArea.Height - Height) / 2);

        }
    }
}