C# 流量懸浮窗

最近覺得360太惡心了，果斷卸載，但是又缺少一個顯示流量的懸浮窗，覺定自己搞一個。

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前言

剛開始用Qt(C++)寫的發現體積太大，輸出個HelloWorld就要幾兆果斷放棄，嘗試了一下C#體積小，占內存小，于是轉用C#。之前寫Java，Android都是用的Eclipse，C#要用VS寫，但VS太大了實在接受不了，網上搜了一下SharpDevelop挺好用的，先上個效果圖：

如果要完美的話，可以添加右鍵菜單，網卡切換，網速限制，每個標簽的點擊顯示應用詳情事件，最小化到任務欄等等，由于時間關系就不寫這么多了，就只寫顯示，拖動，鎖定這幾個功能

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##布局
5個Label顯示RAM，CPU，磁盤占用率，上、下傳流量，怎么好看怎么擺放。
RAM需要背景顯示占用百分比，占用率超過70%背景邊框變紅，需要繼承Label重寫OnPaintBackground

代碼如下：

public partial class BGLabel : Label {public bool BackColorVisible=true;public bool BorderColorVisible=true;public int Taget=70;public int Value=00;public BGLabel(){}protected override void OnPaintBackground (PaintEventArgs e){base.OnPaintBackground(e);if(BackColorVisible){if(Value>=Taget){Brush brush=new SolidBrush(Color.Red);int height=Height*Value/100;e.Graphics.FillRectangle(brush,0,Height-height,Width,Height);}else{Brush brush=new SolidBrush(Color.Green);int height=Height*Value/100;e.Graphics.FillRectangle(brush,0,Height-height,Width,Height);}}if(BorderColorVisible&&Value>=Taget){Pen pen = new Pen(Color.Red,1);e.Graphics.DrawRectangle(pen,0,0,Width-1,Height-1);}} }

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##點擊事件
按住鼠標左鍵拖動，應同學要求右鍵點擊鎖定，再次點擊解除鎖定

繼承 IMessageFilter 接口

partial class MainForm: Form , IMessageFilter

重寫 PreFilterMessage(ref Message m) 方法

private bool isLock=false; private bool isMove=false; private bool isClick=false; private int curXPosition; private int curYPosition; // WM_MOUSEMOVE= $0200 移動鼠標 // WM_LBUTTONDOWN= $0201 按下鼠標左鍵 // WM_LBUTTONUP= $0202 釋放鼠標左鍵 // WM_RBUTTONDOWN= $0204 按下鼠標右鍵 // WM_RBUTTONUP= $0205 釋放鼠標右鍵public bool PreFilterMessage(ref Message m) {if(m.Msg==0x0204){isMove = true;isClick = true;return true;}else if (m.Msg == 0x0205&&isClick){isMove = false;isLock=!isLock;return true;}else if (!isLock&&m.Msg == 0x0201){isMove = true;isClick = true;curXPosition = MousePosition.X;curYPosition = MousePosition.Y;return false;}else if(!isLock&&m.Msg == 0x0200&&isMove){isClick=false;this.Left += MousePosition.X - curXPosition;this.Top += MousePosition.Y - curYPosition;curXPosition = MousePosition.X;curYPosition = MousePosition.Y;return true;}else if(!isLock&&m.Msg == 0x0202){isMove = false;return !isClick;}return false; }

事件對應的Msg的ID請移步【C#】Message類的屬性Msg所關聯的消息ID
最后不要忘了在構造函數中添加過濾

Application.AddMessageFilter(this);

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##獲取占用率
使用性能計數器PerformanceCounter監控上下傳流量，CPU，磁盤占用率，
使用GlobalMemoryStatus函數獲取RAM占用率

public class Monitor {private Network network;private Cpu cpu;private Ram ram;private Disk disk;public Monitor(){PerformanceCounterCategory category = new PerformanceCounterCategory("Network Interface");foreach (string name in category.GetInstanceNames()){if (name == "MS TCP Loopback interface")continue;Network n = new Network(name);if(n.isConnect){network=n;break;}}cpu=new Cpu();ram=new Ram();disk=new Disk();}public void refresh(){network.refresh();cpu.refresh();ram.refresh();disk.refresh();}public string getDownSpeed(){return network.getFormatDownSpeed();}public string getUpSpeed(){return network.getFormatUpSpeed();}public int getCpuUtil(){return cpu.curValue;}public int getRamUtil(){return ram.curValue;}public int getDiskUtil(){return disk.curValue;}public bool isDownSpeedChange(){return network.isDownSpeedChange;}public bool isUpSpeedChange(){return network.isUpSpeedChange;}public bool isCpuUtilChange(){return cpu.curValue!=cpu.oldValue;}public bool isRamUtilChange(){return ram.curValue!=ram.oldValue;}public bool isDiskUtilChange(){return disk.curValue!=disk.oldValue;} }public class Network{public string name { get; private set; }public long downSpeed{ get; private set;}public long upSpeed{ get; private set; }public bool isDownSpeedChange{ get; private set; }public bool isUpSpeedChange{ get; private set; }public bool isConnect{ get; private set; }private PerformanceCounter downCounter, upCounter;private long downValue, upValue;private long downValueOld, upValueOld;private long downSpeedOld,upSpeedOld;public Network(string name){this.name=name;downCounter = new PerformanceCounter("Network Interface", "Bytes Received/sec", name);upCounter = new PerformanceCounter("Network Interface", "Bytes Sent/sec", name);if(downCounter==null||upCounter==null)return;downValueOld=downCounter.NextSample().RawValue;upValueOld=upCounter.NextSample().RawValue;if(downSpeedOld>0||upValueOld>0)isConnect=true;else isConnect=false;}public void refresh(){if(downCounter==null||upCounter==null){downSpeed=0;upSpeed=0;return;}if(downCounter.NextSample()==null||upCounter.NextSample()==null){downSpeed=0;upSpeed=0;return;}downValue = downCounter.NextSample().RawValue;upValue = upCounter.NextSample().RawValue;downSpeed = downValue - downValueOld;upSpeed = upValue - upValueOld;isDownSpeedChange=(downSpeed!=downValue);isUpSpeedChange=(upSpeed!=upSpeedOld);downSpeedOld=downSpeed;upSpeedOld=upSpeed;downValueOld=downValue;upValueOld=upValue;}public string getFormatDownSpeed(){return format(downSpeed);}public string getFormatUpSpeed(){return format(upSpeed);}private string format(long num){double n=num/1024.0;if(n>=1000.0)return (n/1024).ToString("0.00")+"MB/s";else if(n>=100.0)return n.ToString("0.0")+"KB/s";else return n.ToString("0.00")+"KB/s";} }public class Cpu{public int curValue { get; private set; }public int oldValue { get; private set; }private PerformanceCounter counter;public Cpu(){counter = new PerformanceCounter("Processor", "% Processor Time","_Total"); curValue=(int)counter.NextValue(); }public void refresh(){oldValue=curValue;curValue=(int)counter.NextValue();} }public class Ram{public struct MEMORYSTATUS{public uint dwLength;public uint dwMemoryLoad;public ulong dwTotalPhys;public ulong dwAvailPhys;public ulong dwTotalPageFile;public ulong dwAvailPageFile;public ulong dwTotalVirtual;public ulong dwAvailVirtual;public ulong dwAvailExtendedVirtual;}public int curValue { get; private set; }public int oldValue { get; private set; }private MEMORYSTATUS mStatus;[DllImport("kernel32.dll")]public static extern void GlobalMemoryStatus(ref MEMORYSTATUS stat);public Ram(){GlobalMemoryStatus(ref mStatus);curValue=(int)(mStatus.dwMemoryLoad);}public void refresh(){oldValue=curValue;GlobalMemoryStatus(ref mStatus);curValue=(int)(mStatus.dwMemoryLoad);} }public class Disk{public int curValue { get; private set; }public int oldValue { get; private set; }private PerformanceCounter counter;public Disk(){counter=new PerformanceCounter("PhysicalDisk", "% Disk Time", "_Total");int num=(int)counter.NextValue();curValue=num>100?100:num;}public void refresh(){oldValue=curValue;int num=(int)counter.NextValue();curValue=num>100?100:num;} }

最后添加timer，1s更新一次不變的就不更新了

private void timer_Tick(object sender, System.EventArgs e) {monitor.refresh();if(monitor.isRamUtilChange()){lab_0.Value=monitor.getRamUtil();lab_0.Text="RAM\n"+monitor.getRamUtil()+"%";}if(monitor.isDownSpeedChange())lab_1.Text=monitor.getDownSpeed();if(monitor.isUpSpeedChange())lab_2.Text=monitor.getUpSpeed();if(monitor.isCpuUtilChange()){lab_3.Value=monitor.getCpuUtil();lab_3.Text="CPU "+monitor.getCpuUtil()+"%";}if(monitor.isDiskUtilChange()){lab_4.Value=monitor.getDiskUtil();lab_4.Text="DISK "+monitor.getDiskUtil()+"%";} }

到此結束，雖然有些Bug，但不影響使用

Github: https://github.com/kunorz/FloatingWindow

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