基于C#实现屏幕取色器
作者：芝麻粒儿
这篇文章主要为大家详细介绍了如何利用C#实现简易的屏幕取色器，文中的示例代码讲解详细，对我们学习C#有一定的帮助，感兴趣的小伙伴可以了解一下
实践过程
效果
代码
public partial class FrmGetColor : Form
{
public FrmGetColor()
{
InitializeComponent();
}
#region 定义快捷键
//如果函数执行成功，返回值不为0。
//如果函数执行失败，返回值为0。要得到扩展错误信息，调用GetLastError。
[DllImport("user32.dll", SetLastError = true)]
public static extern bool RegisterHotKey(
IntPtr hWnd, //要定义热键的窗口的句柄
int id, //定义热键ID（不能与其它ID重复）
KeyModifiers fsModifiers, //标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效
Keys vk //定义热键的内容
);
[DllImport("user32.dll", SetLastError = true)]
public static extern bool UnregisterHotKey(
IntPtr hWnd, //要取消热键的窗口的句柄
int id //要取消热键的ID
);
//定义了辅助键的名称（将数字转变为字符以便于记忆，也可去除此枚举而直接使用数值）
[Flags()]
public enum KeyModifiers
{
None = 0,
Alt = 1,
Ctrl = 2,
Shift = 4,
WindowsKey = 8
}
#endregion
[DllImport("gdi32.dll")]
static public extern uint GetPixel(IntPtr hDC, int XPos, int YPos);
[DllImport("gdi32.dll")]
static public extern IntPtr CreateDC(string driverName, string deviceName, string output, IntPtr lpinitData);
[DllImport("gdi32.dll")]
static public extern bool DeleteDC(IntPtr DC);
static public byte GetRValue(uint color)
{
return (byte) color;
}
static public byte GetGValue(uint color)
{
return ((byte) (((short) (color)) >> 8));
}
static public byte GetBValue(uint color)
{
return ((byte) ((color) >> 16));
}
static public byte GetAValue(uint color)
{
return ((byte) ((color) >> 24));
}
public Color GetColor(Point screenPoint)
{
IntPtr displayDC = CreateDC("DISPLAY", null, null, IntPtr.Zero);
uint colorref = GetPixel(displayDC, screenPoint.X, screenPoint.Y);
DeleteDC(displayDC);
byte Red = GetRValue(colorref);
byte Green = GetGValue(colorref);
byte Blue = GetBValue(colorref);
return Color.FromArgb(Red, Green, Blue);
}
private void FrmGetColor_Load(object sender, EventArgs e)
{
this.TopMost = true;
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked == true)
{
this.TopMost = true;
}
else
{
this.TopMost = false;
}
}
private void timer1_Tick(object sender, EventArgs e)
{
txtPoint.Text = Control.MousePosition.X.ToString() + "," + Control.MousePosition.Y.ToString();
Point pt = new Point(Control.MousePosition.X, Control.MousePosition.Y);
Color cl = GetColor(pt);
panel1.BackColor = cl;
txtRGB.Text = cl.R + "," + cl.G + "," + cl.B;
txtColor.Text = ColorTranslator.ToHtml(cl).ToString();
RegisterHotKey(Handle, 81, KeyModifiers.Ctrl, Keys.F);
}
private void button1_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void button2_Click(object sender, EventArgs e)
{
AboutBox1 ab = new AboutBox1();
ab.ShowDialog();
}
private void label3_Click(object sender, EventArgs e)
{
System.Diagnostics.Process.Start("http://www.mrbccd.com");
}
protected override void WndProc(ref Message m)
{
const int WM_HOTKEY = 0x0312;
//按快捷键
switch (m.Msg)
{
case WM_HOTKEY:
switch (m.WParam.ToInt32())
{
case 81: //按下的是CTRL+F
Clipboard.SetText(txtColor.Text.Trim());
break;
}
break;
}
base.WndProc(ref m);
}
private void FrmGetColor_Leave(object sender, EventArgs e)
{
}
private void FrmGetColor_FormClosed(object sender, FormClosedEventArgs e)
{
//注销Id号为81的热键设定
UnregisterHotKey(Handle, 81);
}
}
partial class FrmGetColor
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (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.components = new System.ComponentModel.Container();
this.checkBox1 = new System.Windows.Forms.CheckBox();
this.txtPoint = new System.Windows.Forms.TextBox();
this.timer1 = new System.Windows.Forms.Timer(this.components);
this.txtRGB = new System.Windows.Forms.TextBox();
this.panel1 = new System.Windows.Forms.Panel();
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.panel2 = new System.Windows.Forms.Panel();
this.txtColor = new System.Windows.Forms.TextBox();
this.label4 = new System.Windows.Forms.Label();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.panel3 = new System.Windows.Forms.Panel();
this.label6 = new System.Windows.Forms.Label();
this.label5 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.panel2.SuspendLayout();
this.panel3.SuspendLayout();
this.SuspendLayout();
//
// checkBox1
//
this.checkBox1.AutoSize = true;
this.checkBox1.Checked = true;
this.checkBox1.CheckState = System.Windows.Forms.CheckState.Checked;
this.checkBox1.Location = new System.Drawing.Point(6, 7);
this.checkBox1.Name = "checkBox1";
this.checkBox1.Size = new System.Drawing.Size(120, 16);
this.checkBox1.TabIndex = 0;
this.checkBox1.Text = "是否显示在最顶层";
this.checkBox1.UseVisualStyleBackColor = true;
this.checkBox1.CheckedChanged += new System.EventHandler(this.checkBox1_CheckedChanged);
//
// txtPoint
//
this.txtPoint.Location = new System.Drawing.Point(146, 26);
this.txtPoint.Name = "txtPoint";
this.txtPoint.Size = new System.Drawing.Size(111, 21);
this.txtPoint.TabIndex = 1;
//
// timer1
//
this.timer1.Enabled = true;
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
//
// txtRGB
//
this.txtRGB.Location = new System.Drawing.Point(146, 51);
this.txtRGB.Name = "txtRGB";
this.txtRGB.Size = new System.Drawing.Size(111, 21);
this.txtRGB.TabIndex = 2;
//
// panel1
//
this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.panel1.Location = new System.Drawing.Point(6, 33);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(60, 60);
this.panel1.TabIndex = 4;
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(79, 31);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(65, 12);
this.label1.TabIndex = 5;
this.label1.Text = "鼠标位置：";
//
// label2
//
this.label2.AutoSize = true;
this.label2.Location = new System.Drawing.Point(80, 56);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(65, 12);
this.label2.TabIndex = 6;
this.label2.Text = "R G B 值：";
//
// panel2
//
this.panel2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.panel2.Controls.Add(this.txtColor);
this.panel2.Controls.Add(this.label4);
this.panel2.Controls.Add(this.txtPoint);
this.panel2.Controls.Add(this.label2);
this.panel2.Controls.Add(this.checkBox1);
this.panel2.Controls.Add(this.label1);
this.panel2.Controls.Add(this.txtRGB);
this.panel2.Controls.Add(this.panel1);
this.panel2.Location = new System.Drawing.Point(6, 7);
this.panel2.Name = "panel2";
this.panel2.Size = new System.Drawing.Size(278, 104);
this.panel2.TabIndex = 7;
//
// txtColor
//
this.txtColor.Location = new System.Drawing.Point(146, 76);
this.txtColor.Name = "txtColor";
this.txtColor.Size = new System.Drawing.Size(111, 21);
this.txtColor.TabIndex = 9;
//
// label4
//
this.label4.AutoSize = true;
this.label4.Location = new System.Drawing.Point(79, 81);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(65, 12);
this.label4.TabIndex = 8;
this.label4.Text = "网页颜色：";
//
// button1
//
this.button1.FlatStyle = System.Windows.Forms.FlatStyle.System;
this.button1.Location = new System.Drawing.Point(220, 156);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(53, 21);
this.button1.TabIndex = 8;
this.button1.Text = "退出";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(166, 156);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(48, 21);
this.button2.TabIndex = 9;
this.button2.Text = "关于";
this.button2.UseVisualStyleBackColor = true;
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// panel3
//
this.panel3.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.panel3.Controls.Add(this.label6);
this.panel3.Controls.Add(this.label5);
this.panel3.Location = new System.Drawing.Point(6, 117);
this.panel3.Name = "panel3";
this.panel3.Size = new System.Drawing.Size(278, 33);
this.panel3.TabIndex = 10;
//
// label6
//
this.label6.AutoSize = true;
this.label6.Location = new System.Drawing.Point(82, 8);
this.label6.Name = "label6";
this.label6.Size = new System.Drawing.Size(149, 12);
this.label6.TabIndex = 1;
this.label6.Text = "按住Ctrl+F键复制网页颜色";
//
// label5
//
this.label5.AutoSize = true;
this.label5.Location = new System.Drawing.Point(5, 9);
this.label5.Name = "label5";
this.label5.Size = new System.Drawing.Size(77, 12);
this.label5.TabIndex = 0;
this.label5.Text = "复制颜色值：";
//
// label3
//
this.label3.AutoSize = true;
this.label3.Cursor = System.Windows.Forms.Cursors.Help;
this.label3.Location = new System.Drawing.Point(7, 160);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(131, 12);
this.label3.TabIndex = 11;
this.label3.Text = "http://www.mrbccd.com";
this.label3.Click += new System.EventHandler(this.label3_Click);
//
// FrmGetColor
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.BackColor = System.Drawing.Color.WhiteSmoke;
this.ClientSize = new System.Drawing.Size(288, 180);
this.Controls.Add(this.label3);
this.Controls.Add(this.panel3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.panel2);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
this.MaximizeBox = false;
this.Name = "FrmGetColor";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "颜色拾取器";
this.Load += new System.EventHandler(this.FrmGetColor_Load);
this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.FrmGetColor_FormClosed);
this.Leave += new System.EventHandler(this.FrmGetColor_Leave);
this.panel2.ResumeLayout(false);
this.panel2.PerformLayout();
this.panel3.ResumeLayout(false);
this.panel3.PerformLayout();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.CheckBox checkBox1;
private System.Windows.Forms.TextBox txtPoint;
private System.Windows.Forms.Timer timer1;
private System.Windows.Forms.TextBox txtRGB;
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Panel panel2;
private System.Windows.Forms.TextBox txtColor;
private System.Windows.Forms.Label label4;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Panel panel3;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.Label label5;
private System.Windows.Forms.Label label6;
}
到此这篇关于基于C#实现屏幕取色器的文章就介绍到这了,更多相关C#屏幕取色器内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！