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C#实现屏幕抓图并保存的示例代码

更新时间:2022-12-09  作者:佚名   来源: 网络转载

实践过程

效果

C#实现屏幕抓图并保存的示例代码【.Net面试】

代码

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

    private int _X, _Y;

    [StructLayout(LayoutKind.Sequential)]
    private struct ICONINFO
    {
        public bool fIcon;
        public Int32 xHotspot;
        public Int32 yHotspot;
        public IntPtr hbmMask;
        public IntPtr hbmColor;
    }

    [StructLayout(LayoutKind.Sequential)]
    private struct CURSORINFO
    {
        public Int32 cbSize;
        public Int32 flags;
        public IntPtr hCursor;
        public Point ptScreenPos;
    }

    [DllImport("user32.dll", EntryPoint = "GetSystemMetrics")]
    private static extern int GetSystemMetrics(int mVal);

    [DllImport("user32.dll", EntryPoint = "GetCursorInfo")]
    private static extern bool GetCursorInfo(ref CURSORINFO cInfo);

    [DllImport("user32.dll", EntryPoint = "CopyIcon")]
    private static extern IntPtr CopyIcon(IntPtr hIcon);

    [DllImport("user32.dll", EntryPoint = "GetIconInfo")]
    private static extern bool GetIconInfo(IntPtr hIcon, out ICONINFO iInfo);

    [DllImport("kernel32")]
    private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);

    [DllImport("kernel32")]
    private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retval,
        int size, string filePath);

    #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

    public string path;

    public void IniWriteValue(string section, string key, string value)
    {
        WritePrivateProfileString(section, key, value, path);
    }

    public string IniReadValue(string section, string key)
    {
        StringBuilder temp = new StringBuilder(255);
        int i = GetPrivateProfileString(section, key, "", temp, 255, path);
        return temp.ToString();
    }

    private Bitmap CaptureNoCursor() //抓取没有鼠标的桌面
    {
        Bitmap _Source = new Bitmap(GetSystemMetrics(0), GetSystemMetrics(1));
        using (Graphics g = Graphics.FromImage(_Source))
        {
            g.CopyFromScreen(0, 0, 0, 0, _Source.Size);
            g.Dispose();
        }

        return _Source;
    }


    private Bitmap CaptureDesktop() //抓取带鼠标的桌面
    {
        try
        {
            int _CX = 0, _CY = 0;
            Bitmap _Source = new Bitmap(GetSystemMetrics(0), GetSystemMetrics(1));
            using (Graphics g = Graphics.FromImage(_Source))
            {
                g.CopyFromScreen(0, 0, 0, 0, _Source.Size);
                g.DrawImage(CaptureCursor(ref _CX, ref _CY), _CX, _CY);
                g.Dispose();
            }

            _X = (800 - _Source.Width) / 2;
            _Y = (600 - _Source.Height) / 2;
            return _Source;
        }
        catch
        {
            return null;
        }
    }

    private Bitmap CaptureCursor(ref int _CX, ref int _CY)
    {
        IntPtr _Icon;
        CURSORINFO _CursorInfo = new CURSORINFO();
        ICONINFO _IconInfo;
        _CursorInfo.cbSize = Marshal.SizeOf(_CursorInfo);
        if (GetCursorInfo(ref _CursorInfo))
        {
            if (_CursorInfo.flags == 0x00000001)
            {
                _Icon = CopyIcon(_CursorInfo.hCursor);

                if (GetIconInfo(_Icon, out _IconInfo))
                {
                    _CX = _CursorInfo.ptScreenPos.X - _IconInfo.xHotspot;
                    _CY = _CursorInfo.ptScreenPos.Y - _IconInfo.yHotspot;
                    return Icon.FromHandle(_Icon).ToBitmap();
                }
            }
        }

        return null;
    }

    string Cursor;
    string PicPath;

    private void button1_Click(object sender, EventArgs e)
    {
        try
        {
            path = Application.StartupPath.ToString();
            path = path.Substring(0, path.LastIndexOf(""));
            path = path.Substring(0, path.LastIndexOf(""));
            path += @"Setup.ini";
            if (checkBox1.Checked == true)
            {
                Cursor = "1";
            }
            else
            {
                Cursor = "0";
            }

            if (txtSavaPath.Text == "")
            {
                PicPath = @"D:";
            }
            else
            {
                PicPath = txtSavaPath.Text.Trim();
            }

            IniWriteValue("Setup", "CapMouse", Cursor);
            IniWriteValue("Setup", "Dir", PicPath);
            MessageBox.Show("保存成功!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        }
    }

    private void button2_Click(object sender, EventArgs e)
    {
        this.Hide();
    }

    private void button3_Click(object sender, EventArgs e)
    {
        if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
        {
            txtSavaPath.Text = folderBrowserDialog1.SelectedPath;
        }
    }

    private void Form1_StyleChanged(object sender, EventArgs e)
    {
        RegisterHotKey(Handle, 81, KeyModifiers.Shift, Keys.F);
    }

    public bool flag = true;

    private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
    {
        //注销Id号为81的热键设定    
        UnregisterHotKey(Handle, 81);
        timer1.Stop();
        flag = false;
        Application.Exit();
    }

    string MyCursor;
    string MyPicPath;

    private void Form1_Activated(object sender, EventArgs e)
    {
        RegisterHotKey(Handle, 81, KeyModifiers.Shift, Keys.F);
        path = Application.StartupPath.ToString();
        path = path.Substring(0, path.LastIndexOf(""));
        path = path.Substring(0, path.LastIndexOf(""));
        path += @"Setup.ini";
        MyCursor = IniReadValue("Setup", "CapMouse");
        MyPicPath = IniReadValue("Setup", "Dir");
        if (MyCursor == "" || MyPicPath == "")
        {
            checkBox1.Checked = true;
            txtSavaPath.Text = @"D:";
        }
        else
        {
            if (MyCursor == "1")
            {
                checkBox1.Checked = true;
            }
            else
            {
                checkBox1.Checked = false;
            }

            txtSavaPath.Text = MyPicPath;
        }
    }

    private void getImg()
    {
        DirectoryInfo di = new DirectoryInfo(MyPicPath);
        if (!di.Exists)
        {
            Directory.CreateDirectory(MyPicPath);
        }

        if (MyPicPath.Length == 3)
            MyPicPath = MyPicPath.Remove(MyPicPath.LastIndexOf(":") + 1);
        string PicPath = MyPicPath + "IMG_" + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() +
                         DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() +
                         DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + ".bmp";
        Bitmap bt;
        if (MyCursor == "0")
        {
            bt = CaptureNoCursor();
            bt.Save(PicPath);
        }
        else
        {
            bt = CaptureDesktop();
            bt.Save(PicPath);
        }
    }

    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Shift+Q                   
                        getImg();
                        break;
                }

                break;
        }

        base.WndProc(ref m);
    }

    private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e) //双击显示设置窗体
    {
        this.Show();
    }

    private void 设置ToolStripMenuItem_Click(object sender, EventArgs e) //单击设置打开设置窗体
    {
        this.Show();
    }

    private void timer1_Tick(object sender, EventArgs e)
    {
        RegisterHotKey(Handle, 81, KeyModifiers.Shift, Keys.F);
    }

    private void Form1_FormClosing(object sender, FormClosingEventArgs e)
    {
        this.Hide();
        if (flag == true)
        {
            e.Cancel = true;
        }
    }

    private void Form1_Load(object sender, EventArgs e)
    {
    }
}
partial class Form1
{
    /// <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();
        System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
        this.button1 = new System.Windows.Forms.Button();
        this.button2 = new System.Windows.Forms.Button();
        this.groupBox1 = new System.Windows.Forms.GroupBox();
        this.button3 = new System.Windows.Forms.Button();
        this.txtSavaPath = new System.Windows.Forms.TextBox();
        this.label1 = new System.Windows.Forms.Label();
        this.checkBox1 = new System.Windows.Forms.CheckBox();
        this.folderBrowserDialog1 = new System.Windows.Forms.FolderBrowserDialog();
        this.notifyIcon1 = new System.Windows.Forms.NotifyIcon(this.components);
        this.contextMenuStrip1 = new System.Windows.Forms.ContextMenuStrip(this.components);
        this.设置ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this.退出ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this.timer1 = new System.Windows.Forms.Timer(this.components);
        this.groupBox1.SuspendLayout();
        this.contextMenuStrip1.SuspendLayout();
        this.SuspendLayout();
        // 
        // button1
        // 
        this.button1.Location = new System.Drawing.Point(82, 91);
        this.button1.Name = "button1";
        this.button1.Size = new System.Drawing.Size(75, 23);
        this.button1.TabIndex = 2;
        this.button1.Text = "保存设置";
        this.button1.UseVisualStyleBackColor = true;
        this.button1.Click += new System.EventHandler(this.button1_Click);
        // 
        // button2
        // 
        this.button2.Location = new System.Drawing.Point(163, 91);
        this.button2.Name = "button2";
        this.button2.Size = new System.Drawing.Size(75, 23);
        this.button2.TabIndex = 3;
        this.button2.Text = "关闭";
        this.button2.UseVisualStyleBackColor = true;
        this.button2.Click += new System.EventHandler(this.button2_Click);
        // 
        // groupBox1
        // 
        this.groupBox1.Controls.Add(this.button3);
        this.groupBox1.Controls.Add(this.txtSavaPath);
        this.groupBox1.Controls.Add(this.label1);
        this.groupBox1.Controls.Add(this.checkBox1);
        this.groupBox1.Location = new System.Drawing.Point(13, 14);
        this.groupBox1.Name = "groupBox1";
        this.groupBox1.Size = new System.Drawing.Size(301, 71);
        this.groupBox1.TabIndex = 5;
        this.groupBox1.TabStop = false;
        this.groupBox1.Text = "功能设置";
        // 
        // button3
        // 
        this.button3.Location = new System.Drawing.Point(257, 42);
        this.button3.Name = "button3";
        this.button3.Size = new System.Drawing.Size(35, 23);
        this.button3.TabIndex = 3;
        this.button3.Text = "...";
        this.button3.UseVisualStyleBackColor = true;
        this.button3.Click += new System.EventHandler(this.button3_Click);
        // 
        // txtSavaPath
        // 
        this.txtSavaPath.BackColor = System.Drawing.Color.White;
        this.txtSavaPath.Location = new System.Drawing.Point(69, 44);
        this.txtSavaPath.Name = "txtSavaPath";
        this.txtSavaPath.ReadOnly = true;
        this.txtSavaPath.Size = new System.Drawing.Size(182, 21);
        this.txtSavaPath.TabIndex = 2;
        // 
        // label1
        // 
        this.label1.AutoSize = true;
        this.label1.Location = new System.Drawing.Point(9, 49);
        this.label1.Name = "label1";
        this.label1.Size = new System.Drawing.Size(65, 12);
        this.label1.TabIndex = 1;
        this.label1.Text = "存放目录:";
        // 
        // checkBox1
        // 
        this.checkBox1.AutoSize = true;
        this.checkBox1.Location = new System.Drawing.Point(11, 20);
        this.checkBox1.Name = "checkBox1";
        this.checkBox1.Size = new System.Drawing.Size(198, 16);
        this.checkBox1.TabIndex = 0;
        this.checkBox1.Text = "抓取鼠标(抓图快捷键为Shift+F)";
        this.checkBox1.UseVisualStyleBackColor = true;
        // 
        // notifyIcon1
        // 
        this.notifyIcon1.ContextMenuStrip = this.contextMenuStrip1;
        this.notifyIcon1.Icon = ((System.Drawing.Icon)(resources.GetObject("notifyIcon1.Icon")));
        this.notifyIcon1.Text = "啸天屏幕抓图";
        this.notifyIcon1.Visible = true;
        this.notifyIcon1.MouseDoubleClick += new System.Windows.Forms.MouseEventHandler(this.notifyIcon1_MouseDoubleClick);
        // 
        // contextMenuStrip1
        // 
        this.contextMenuStrip1.AutoSize = false;
        this.contextMenuStrip1.BackColor = System.Drawing.Color.White;
        this.contextMenuStrip1.BackgroundImageLayout = System.Windows.Forms.ImageLayout.None;
        this.contextMenuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this.设置ToolStripMenuItem,
        this.退出ToolStripMenuItem});
        this.contextMenuStrip1.Name = "contextMenuStrip1";
        this.contextMenuStrip1.RenderMode = System.Windows.Forms.ToolStripRenderMode.Professional;
        this.contextMenuStrip1.ShowImageMargin = false;
        this.contextMenuStrip1.ShowItemToolTips = false;
        this.contextMenuStrip1.Size = new System.Drawing.Size(50, 55);
        // 
        // 设置ToolStripMenuItem
        // 
        this.设置ToolStripMenuItem.AutoSize = false;
        this.设置ToolStripMenuItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text;
        this.设置ToolStripMenuItem.ImageTransparentColor = System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(128)))), ((int)(((byte)(255)))));
        this.设置ToolStripMenuItem.Name = "设置ToolStripMenuItem";
        this.设置ToolStripMenuItem.Size = new System.Drawing.Size(50, 22);
        this.设置ToolStripMenuItem.Text = "设置";
        this.设置ToolStripMenuItem.Click += new System.EventHandler(this.设置ToolStripMenuItem_Click);
        // 
        // 退出ToolStripMenuItem
        // 
        this.退出ToolStripMenuItem.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text;
        this.退出ToolStripMenuItem.ImageScaling = System.Windows.Forms.ToolStripItemImageScaling.None;
        this.退出ToolStripMenuItem.Name = "退出ToolStripMenuItem";
        this.退出ToolStripMenuItem.Size = new System.Drawing.Size(69, 22);
        this.退出ToolStripMenuItem.Text = "退出";
        this.退出ToolStripMenuItem.Click += new System.EventHandler(this.退出ToolStripMenuItem_Click);
        // 
        // timer1
        // 
        this.timer1.Enabled = true;
        this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
        // 
        // Form1
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(326, 123);
        this.Controls.Add(this.groupBox1);
        this.Controls.Add(this.button1);
        this.Controls.Add(this.button2);
        this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
        this.MaximizeBox = false;
        this.MinimizeBox = false;
        this.Name = "Form1";
        this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
        this.Text = "屏幕抓图";
        this.StyleChanged += new System.EventHandler(this.Form1_StyleChanged);
        this.Load += new System.EventHandler(this.Form1_Load);
        this.Activated += new System.EventHandler(this.Form1_Activated);
        this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);
        this.groupBox1.ResumeLayout(false);
        this.groupBox1.PerformLayout();
        this.contextMenuStrip1.ResumeLayout(false);
        this.ResumeLayout(false);

    }

    #endregion

    private System.Windows.Forms.Button button1;
    private System.Windows.Forms.Button button2;
    private System.Windows.Forms.GroupBox groupBox1;
    private System.Windows.Forms.TextBox txtSavaPath;
    private System.Windows.Forms.Label label1;
    private System.Windows.Forms.CheckBox checkBox1;
    private System.Windows.Forms.Button button3;
    private System.Windows.Forms.FolderBrowserDialog folderBrowserDialog1;
    private System.Windows.Forms.NotifyIcon notifyIcon1;
    private System.Windows.Forms.ContextMenuStrip contextMenuStrip1;
    private System.Windows.Forms.ToolStripMenuItem 设置ToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem 退出ToolStripMenuItem;
    private System.Windows.Forms.Timer timer1;
}

到此这篇关于C#实现屏幕抓图并保存的示例代码的文章就介绍到这了,更多相关C#屏幕抓图内容请搜索云海天教程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云海天教程!

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