This commit is contained in:
Manuel Kamper 2019-03-22 23:12:32 +01:00
parent 806d17f954
commit bb1282e066
5 changed files with 243 additions and 1 deletions

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Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio 15
VisualStudioVersion = 15.0.28307.438
MinimumVisualStudioVersion = 10.0.40219.1
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Mk0.Tools.SingleInstance", "Mk0.Tools.SingleInstance\Mk0.Tools.SingleInstance.csproj", "{EE314A04-04C0-4FFB-999C-893F61EC59BD}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{EE314A04-04C0-4FFB-999C-893F61EC59BD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{EE314A04-04C0-4FFB-999C-893F61EC59BD}.Debug|Any CPU.Build.0 = Debug|Any CPU
{EE314A04-04C0-4FFB-999C-893F61EC59BD}.Release|Any CPU.ActiveCfg = Release|Any CPU
{EE314A04-04C0-4FFB-999C-893F61EC59BD}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
EndGlobalSection
GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {ACE43D6F-6DD1-4695-9A29-F0316CDFE039}
EndGlobalSection
EndGlobal

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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProjectGuid>{EE314A04-04C0-4FFB-999C-893F61EC59BD}</ProjectGuid>
<OutputType>Library</OutputType>
<AppDesignerFolder>Properties</AppDesignerFolder>
<RootNamespace>Mk0.Tools.SingleInstance</RootNamespace>
<AssemblyName>Mk0.Tools.SingleInstance</AssemblyName>
<TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
<FileAlignment>512</FileAlignment>
<Deterministic>true</Deterministic>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\Debug\</OutputPath>
<DefineConstants>DEBUG;TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<DebugType>pdbonly</DebugType>
<Optimize>true</Optimize>
<OutputPath>bin\Release\</OutputPath>
<DefineConstants>TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<ItemGroup>
<Reference Include="System" />
<Reference Include="System.Windows.Forms" />
<Reference Include="Microsoft.CSharp" />
</ItemGroup>
<ItemGroup>
<Compile Include="SingleApplication.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>

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using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
// Allgemeine Informationen über eine Assembly werden über die folgenden
// Attribute gesteuert. Ändern Sie diese Attributwerte, um die Informationen zu ändern,
// die einer Assembly zugeordnet sind.
[assembly: AssemblyTitle("Mk0.Tools.SingleInstance")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("Mk0.Tools.SingleInstance")]
[assembly: AssemblyCopyright("Copyright © 2019 mk0.at")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
// Durch Festlegen von ComVisible auf FALSE werden die Typen in dieser Assembly
// für COM-Komponenten unsichtbar. Wenn Sie auf einen Typ in dieser Assembly von
// COM aus zugreifen müssen, sollten Sie das ComVisible-Attribut für diesen Typ auf "True" festlegen.
[assembly: ComVisible(false)]
// Die folgende GUID bestimmt die ID der Typbibliothek, wenn dieses Projekt für COM verfügbar gemacht wird
[assembly: Guid("ee314a04-04c0-4ffb-999c-893f61ec59bd")]
// Versionsinformationen für eine Assembly bestehen aus den folgenden vier Werten:
//
// Hauptversion
// Nebenversion
// Buildnummer
// Revision
//
// Sie können alle Werte angeben oder Standardwerte für die Build- und Revisionsnummern verwenden,
// indem Sie "*" wie unten gezeigt eingeben:
// [assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]

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using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Threading;
using System.Reflection;
using System.IO;
namespace Mk0.Tools.SingleInstance
{
/// <summary>
/// Summary description for SingleApp.
/// </summary>
public class SingleApplication
{
public SingleApplication()
{
}
/// <summary>
/// Imports
/// </summary>
[DllImport("user32.dll")]
private static extern int ShowWindow(IntPtr hWnd, int nCmdShow);
[DllImport("user32.dll")]
private static extern int SetForegroundWindow(IntPtr hWnd);
[DllImport("user32.dll")]
private static extern int IsIconic(IntPtr hWnd);
/// <summary>
/// GetCurrentInstanceWindowHandle
/// </summary>
/// <returns></returns>
private static IntPtr GetCurrentInstanceWindowHandle()
{
IntPtr hWnd = IntPtr.Zero;
Process process = Process.GetCurrentProcess();
Process[] processes = Process.GetProcessesByName(process.ProcessName);
foreach (Process _process in processes)
{
if (_process.Id != process.Id &&
_process.MainModule.FileName == process.MainModule.FileName &&
_process.MainWindowHandle != IntPtr.Zero)
{
hWnd = _process.MainWindowHandle;
break;
}
}
return hWnd;
}
/// <summary>
/// SwitchToCurrentInstance
/// </summary>
private static void SwitchToCurrentInstance()
{
IntPtr hWnd = GetCurrentInstanceWindowHandle();
if (hWnd != IntPtr.Zero)
{
if (IsIconic(hWnd) != 0)
{
ShowWindow(hWnd, SW_RESTORE);
}
SetForegroundWindow(hWnd);
}
}
/// <summary>
/// Execute a form base application if another instance already running on
/// the system activate previous one
/// </summary>
/// <param name="frmMain">main form</param>
/// <param name="appSetting">your app can set if single instance (true) or multi instance (false)</param>
/// <returns>true if no previous instance is running</returns>
public static bool Run(Form frmMain, bool appSetting=true)
{
if (IsAlreadyRunning() && appSetting)
{
SwitchToCurrentInstance();
return false;
}
Application.Run(frmMain);
return true;
}
/// <summary>
/// for console base application
/// </summary>
/// <returns></returns>
public static bool Run()
{
if (IsAlreadyRunning())
{
return false;
}
return true;
}
/// <summary>
/// check if given exe alread running or not
/// </summary>
/// <returns>returns true if already running</returns>
private static bool IsAlreadyRunning()
{
string strLoc = Assembly.GetExecutingAssembly().Location;
FileSystemInfo fileInfo = new FileInfo(strLoc);
string sExeName = fileInfo.Name;
mutex = new Mutex(true, "Global\\" + sExeName, out bool bCreatedNew);
if (bCreatedNew)
{
mutex.ReleaseMutex();
}
return !bCreatedNew;
}
static Mutex mutex;
const int SW_RESTORE = 9;
}
}

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# Mk0.Tools.SingleInstance
(C) 2019 mk0.at
With this code you are able to make your application a single instance.
Usage example:
static void Main(string[] args)
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
SingleApplication.Run(new MainForm(), Demo.Properties.Settings.Default.singleInstance);
}
MainForm is the form to show on start
singleInstance is an optional boolean value, where you can enable/disable SingleInstance within your application settings