颜色选择器的设计与实现
通过颜色选择器可以简单的获得喜欢颜色的RGB值。
实现步骤：
1、 拖拽picturebox，HScrollBar控件和TextBox；
2、 为HScrollBar的滚动事件添加事件处理程序如下：
private void hScrollBar3_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
{
this.textBox1.Text = this.hScrollBar1.Value.ToString();
this.textBox2.Text = this.hScrollBar2.Value.ToString();
this.textBox3.Text = this.hScrollBar3.Value.ToString();
this.pictureBox1.BackColor = Color.FromArgb(this.hScrollBar1.Value,this.hScrollBar2.Value,this.hScrollBar3.Value);
}
3、 为textBox1、textBox2、textBox3添加的TextChanged事件处理程序如下：
private void textBox1_TextChanged(object sender, System.EventArgs e)
{
try
{
int i = Convert.ToInt32(this.textBox1.Text);
int j = Convert.ToInt32(this.textBox2.Text);
int k = Convert.ToInt32(this.textBox3.Text);
if(((i <= 255)&&(i>=0))&&((j <= 255)&&(j>=0))&&((k <= 255)&&(k>=0)))
{
this.hScrollBar1.Value = i;
this.hScrollBar2.Value = j;
this.hScrollBar3.Value = k;
this.pictureBox1.BackColor = Color.FromArgb(this.hScrollBar1.Value,this.hScrollBar2.Value,this.hScrollBar3.Value);
}
}
catch
{
}
}
3、其它代码见清单
//完整的实例代码如下：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace ColorSelect
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.HScrollBar hScrollBar1;
private System.Windows.Forms.HScrollBar hScrollBar2;
private System.Windows.Forms.HScrollBar hScrollBar3;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.TextBox textBox3;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.hScrollBar1 = new System.Windows.Forms.HScrollBar();
this.hScrollBar2 = new System.Windows.Forms.HScrollBar();
this.hScrollBar3 = new System.Windows.Forms.HScrollBar();
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// pictureBox1
//
this.pictureBox1.Location = new System.Drawing.Point(32, 48);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(224, 208);
this.pictureBox1.TabIndex = 0;
this.pictureBox1.TabStop = false;
//
// hScrollBar1
//
this.hScrollBar1.Location = new System.Drawing.Point(304, 80);
this.hScrollBar1.Maximum = 264;
this.hScrollBar1.Name = "hScrollBar1";
this.hScrollBar1.Size = new System.Drawing.Size(408, 17);
this.hScrollBar1.TabIndex = 1;
this.hScrollBar1.Scroll += new System.Windows.Forms.ScrollEventHandler(this.hScrollBar1_Scroll);
//
// hScrollBar2
//
this.hScrollBar2.Location = new System.Drawing.Point(304, 112);
this.hScrollBar2.Maximum = 264;
this.hScrollBar2.Name = "hScrollBar2";
this.hScrollBar2.Size = new System.Drawing.Size(408, 17);
this.hScrollBar2.TabIndex = 2;
this.hScrollBar2.Scroll += new System.Windows.Forms.ScrollEventHandler(this.hScrollBar2_Scroll);
//
// hScrollBar3
//
this.hScrollBar3.Location = new System.Drawing.Point(304, 144);
this.hScrollBar3.Maximum = 264;
this.hScrollBar3.Name = "hScrollBar3";
this.hScrollBar3.Size = new System.Drawing.Size(408, 17);
this.hScrollBar3.TabIndex = 3;
this.hScrollBar3.Scroll += new System.Windows.Forms.ScrollEventHandler(this.hScrollBar3_Scroll);
//
// label1
//
this.label1.Location = new System.Drawing.Point(280, 80);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(24, 24);
this.label1.TabIndex = 4;
this.label1.Text = "红";
//
// label2
//
this.label2.Location = new System.Drawing.Point(280, 144);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(24, 16);
this.label2.TabIndex = 5;
this.label2.Text = "蓝";
//
// label3
//
this.label3.Location = new System.Drawing.Point(280, 112);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(24, 24);
this.label3.TabIndex = 6;
this.label3.Text = "绿";
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(720, 80);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(64, 21);
this.textBox1.TabIndex = 7;
this.textBox1.Text = "textBox1";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(720, 112);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(64, 21);
this.textBox2.TabIndex = 8;
this.textBox2.Text = "textBox2";
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(720, 144);
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(64, 21);
this.textBox3.TabIndex = 9;
this.textBox3.Text = "textBox3";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(840, 334);
this.Controls.Add(this.textBox3);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.label3);
this.Controls.Add(this.label2);
this.Controls.Add(this.label1);
this.Controls.Add(this.hScrollBar3);
this.Controls.Add(this.hScrollBar2);
this.Controls.Add(this.hScrollBar1);
this.Controls.Add(this.pictureBox1);
this.Name = "Form1";
this.Text = "颜色选择器";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void hScrollBar3_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
{
this.textBox1.Text = this.hScrollBar1.Value.ToString();
this.textBox2.Text = this.hScrollBar2.Value.ToString();
this.textBox3.Text = this.hScrollBar3.Value.ToString();
this.pictureBox1.BackColor = Color.FromArgb(this.hScrollBar1.Value,this.hScrollBar2.Value,this.hScrollBar3.Value);
}
private void Form1_Load(object sender, System.EventArgs e)
{
hScrollBar3_Scroll(null,null);
}
private void hScrollBar2_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
{
hScrollBar3_Scroll(null,null);
}
private void hScrollBar1_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
{
hScrollBar3_Scroll(null,null);
}
}
}
