asynchrone programmierung beispiele hinzugefügt

Async_Await/Async_Await.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Async_Await/Ex1.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Threading.Tasks;
+
+public class Ex1
+{
+    public static async Task Run()
+    {
+        /* Example of async and await */
+        Console.WriteLine("Start");
+        await DoWorkAsync();
+        Console.WriteLine("Finished");
+    }
+
+    private static async Task DoWorkAsync()
+    {
+        await Task.Delay(2000);
+    }
+}

Async_Await/Ex2.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Threading.Tasks;
+
+public class Ex2
+{
+    public static async Task Run()
+    {
+        /* Example of Tasks, showcasing Ressource Efficency */
+        var task1 = DoMoreWorkAsync("One");
+        var task2 = DoMoreWorkAsync("Two");
+        var task3 = DoMoreWorkAsync("Three");
+
+        await task1;
+        await task2;
+        await task3;
+        Console.WriteLine("Finished example showcasing resource efficency\n\n");
+    }
+
+    private static async Task DoMoreWorkAsync(string name)
+    {
+        Console.WriteLine($"Task {name} is being executed by Thread {Thread.CurrentThread.ManagedThreadId}");
+        await Task.Delay(2000);
+        Console.WriteLine($"Task {name} is done");
+
+    }
+}

Async_Await/Ex3.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Threading.Tasks;
+
+public class Ex3
+{
+    public static async Task Run()
+    {
+        /* Example using a Task<T> type */
+        var lowerCaseString = "i want to be an upper case string";
+        Console.WriteLine("main: " + lowerCaseString);
+        var upperCaseString = await WorkOnStringAsync(lowerCaseString);
+        Console.WriteLine("main: " + upperCaseString);
+    }
+
+    private static async Task<string> WorkOnStringAsync(string s)
+    {
+        Console.WriteLine("Task: Async task started");
+        Console.WriteLine("Task: Waiting for 2 sec");
+        await Task.Delay(2000);
+        Console.WriteLine("Task: Done waiting, returning the upper case string");
+        return s.ToUpper();
+    }
+}

Async_Await/Ex4.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Threading.Tasks;
+
+public class Ex4
+{
+    public static async Task Run()
+    {
+        /* Example working with Tasks and awaiting them later */
+        var lowerCaseString = "i want to be an upper case string";
+        Console.WriteLine("main: " + lowerCaseString);
+        // Start the task but do not await yet
+        Task<string> upperCaseTask = WorkOnStringAsync(lowerCaseString);
+        Console.WriteLine("main: WorkOnStringAsync has been called, doing other work...");
+        // Now await the result
+        Console.WriteLine("main: Now waiting for the result");
+        var upperCaseString = await upperCaseTask;
+        Console.WriteLine("main: " + upperCaseString);
+    }
+
+    private static async Task<string> WorkOnStringAsync(string s)
+    {
+        Console.WriteLine("Task: Async task started");
+        Console.WriteLine("Task: Waiting for 2 sec");
+        await Task.Delay(2000);
+        Console.WriteLine("Task: Done waiting, returning the upper case string");
+        return s.ToUpper();
+    }
+}

Async_Await/Ex5.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Threading.Tasks;
+
+public class Ex5
+{
+    public static async Task Run()
+    {
+        /* Example for Task Coordination using Task.WhenAll() */
+        Random random = new();
+        async Task<(int index, int waitingTime)> randomDelay(int index)
+        {
+            var waitingTime = random.Next(500, 2000);
+            await Task.Delay(waitingTime);
+            return (index, waitingTime);
+        }
+
+        var delayTask1 = randomDelay(1);
+        var delayTask2 = randomDelay(2);
+        var delayTask3 = randomDelay(3);
+
+        await Task.WhenAll(delayTask1, delayTask2, delayTask3);
+
+        Console.WriteLine($"Task {delayTask1.Result.index} had to wait for {delayTask1.Result.waitingTime} ms");
+        Console.WriteLine($"Task {delayTask2.Result.index} had to wait for {delayTask2.Result.waitingTime} ms");
+        Console.WriteLine($"Task {delayTask3.Result.index} had to wait for {delayTask3.Result.waitingTime} ms");
+    }
+}

Async_Await/Ex6.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+public class Ex6
+{
+    public static async Task Run()
+    {
+        /* Example for Task Coordination using Task.WhenAny() */
+        Random random = new();
+        async Task<(int index, int waitingTime)> randomDelay(int index)
+        {
+            var waitingTime = random.Next(500, 2000);
+            await Task.Delay(waitingTime);
+            return (index, waitingTime);
+        }
+
+        List<Task<(int index, int waitingTime)>> taskList = new();
+        for (int i = 1; i < 10; i++)
+        {
+            var delayedTask = randomDelay(i);
+            taskList.Add(delayedTask);
+        }
+        var fastestTask = await Task.WhenAny(taskList);
+        Console.WriteLine($"The fastest task was Task {fastestTask.Result.index}. It took {fastestTask.Result.waitingTime} ms to complete.");
+    }
+}

Async_Await/Program.cs

@@ -0,0 +1,40 @@
+
+using System;
+using System.Threading.Tasks;
+
+class Program
+{
+    static async Task Main(string[] args)
+    {
+        if (args.Length == 0)
+        {
+            Console.WriteLine("Usage: dotnet run -- ex1|ex2|ex3|ex4|ex5|ex6");
+            return;
+        }
+
+        switch (args[0].ToLower())
+        {
+            case "ex1":
+                await Ex1.Run();
+                break;
+            case "ex2":
+                await Ex2.Run();
+                break;
+            case "ex3":
+                await Ex3.Run();
+                break;
+            case "ex4":
+                await Ex4.Run();
+                break;
+            case "ex5":
+                await Ex5.Run();
+                break;
+            case "ex6":
+                await Ex6.Run();
+                break;
+            default:
+                Console.WriteLine($"Unknown example: {args[0]}");
+                break;
+        }
+    }
+}

Async_Await/obj/Async_Await.csproj.nuget.dgspec.json

@@ -0,0 +1,66 @@
+{
+  "format": 1,
+  "restore": {
+    "/workspaces/CSharp/Async_Await/Async_Await.csproj": {}
+  },
+  "projects": {
+    "/workspaces/CSharp/Async_Await/Async_Await.csproj": {
+      "version": "1.0.0",
+      "restore": {
+        "projectUniqueName": "/workspaces/CSharp/Async_Await/Async_Await.csproj",
+        "projectName": "Async_Await",
+        "projectPath": "/workspaces/CSharp/Async_Await/Async_Await.csproj",
+        "packagesPath": "/root/.nuget/packages/",
+        "outputPath": "/workspaces/CSharp/Async_Await/obj/",
+        "projectStyle": "PackageReference",
+        "configFilePaths": [
+          "/root/.nuget/NuGet/NuGet.Config"
+        ],
+        "originalTargetFrameworks": [
+          "net8.0"
+        ],
+        "sources": {
+          "https://api.nuget.org/v3/index.json": {}
+        },
+        "frameworks": {
+          "net8.0": {
+            "targetAlias": "net8.0",
+            "projectReferences": {}
+          }
+        },
+        "warningProperties": {
+          "warnAsError": [
+            "NU1605"
+          ]
+        },
+        "restoreAuditProperties": {
+          "enableAudit": "true",
+          "auditLevel": "low",
+          "auditMode": "direct"
+        }
+      },
+      "frameworks": {
+        "net8.0": {
+          "targetAlias": "net8.0",
+          "imports": [
+            "net461",
+            "net462",
+            "net47",
+            "net471",
+            "net472",
+            "net48",
+            "net481"
+          ],
+          "assetTargetFallback": true,
+          "warn": true,
+          "frameworkReferences": {
+            "Microsoft.NETCore.App": {
+              "privateAssets": "all"
+            }
+          },
+          "runtimeIdentifierGraphPath": "/usr/share/dotnet/sdk/8.0.410/PortableRuntimeIdentifierGraph.json"
+        }
+      }
+    }
+  }
+}

Async_Await/obj/Async_Await.csproj.nuget.g.props

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
+    <RestoreSuccess Condition=" '$(RestoreSuccess)' == '' ">True</RestoreSuccess>
+    <RestoreTool Condition=" '$(RestoreTool)' == '' ">NuGet</RestoreTool>
+    <ProjectAssetsFile Condition=" '$(ProjectAssetsFile)' == '' ">$(MSBuildThisFileDirectory)project.assets.json</ProjectAssetsFile>
+    <NuGetPackageRoot Condition=" '$(NuGetPackageRoot)' == '' ">/root/.nuget/packages/</NuGetPackageRoot>
+    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">/root/.nuget/packages/</NuGetPackageFolders>
+    <NuGetProjectStyle Condition=" '$(NuGetProjectStyle)' == '' ">PackageReference</NuGetProjectStyle>
+    <NuGetToolVersion Condition=" '$(NuGetToolVersion)' == '' ">6.11.1</NuGetToolVersion>
+  </PropertyGroup>
+  <ItemGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
+    <SourceRoot Include="/root/.nuget/packages/" />
+  </ItemGroup>
+</Project>

Async_Await/obj/Async_Await.csproj.nuget.g.targets

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" />

Async_Await/obj/Debug/net8.0/.NETCoreApp,Version=v8.0.AssemblyAttributes.cs

@@ -0,0 +1,4 @@
+// <autogenerated />
+using System;
+using System.Reflection;
+[assembly: global::System.Runtime.Versioning.TargetFrameworkAttribute(".NETCoreApp,Version=v8.0", FrameworkDisplayName = ".NET 8.0")]

Async_Await/obj/Debug/net8.0/Async_Await.AssemblyInfo.cs

@@ -0,0 +1,22 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Reflection;
+
+[assembly: System.Reflection.AssemblyCompanyAttribute("Async_Await")]
+[assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
+[assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyProductAttribute("Async_Await")]
+[assembly: System.Reflection.AssemblyTitleAttribute("Async_Await")]
+[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
+
+// Generated by the MSBuild WriteCodeFragment class.
+

Async_Await/obj/Debug/net8.0/Async_Await.AssemblyInfoInputs.cache

@@ -0,0 +1 @@
+63804ea50179688365807671500045cda9689bbb802dfd4b9f520cad32043daf

Async_Await/obj/Debug/net8.0/Async_Await.GeneratedMSBuildEditorConfig.editorconfig

@@ -0,0 +1,13 @@
+is_global = true
+build_property.TargetFramework = net8.0
+build_property.TargetPlatformMinVersion = 
+build_property.UsingMicrosoftNETSdkWeb = 
+build_property.ProjectTypeGuids = 
+build_property.InvariantGlobalization = 
+build_property.PlatformNeutralAssembly = 
+build_property.EnforceExtendedAnalyzerRules = 
+build_property._SupportedPlatformList = Linux,macOS,Windows
+build_property.RootNamespace = Async_Await
+build_property.ProjectDir = /workspaces/CSharp/Async_Await/
+build_property.EnableComHosting = 
+build_property.EnableGeneratedComInterfaceComImportInterop = 

Async_Await/obj/Debug/net8.0/Async_Await.GlobalUsings.g.cs

@@ -0,0 +1,8 @@
+// <auto-generated/>
+global using global::System;
+global using global::System.Collections.Generic;
+global using global::System.IO;
+global using global::System.Linq;
+global using global::System.Net.Http;
+global using global::System.Threading;
+global using global::System.Threading.Tasks;

Async_Await/obj/Debug/net8.0/Async_Await.csproj.CoreCompileInputs.cache

@@ -0,0 +1 @@
+f56eca8a218035aaee0739bd26bba4d23e0f75fd08331f478a25b9179244fa4b

Async_Await/obj/Debug/net8.0/Async_Await.csproj.FileListAbsolute.txt

@@ -0,0 +1,14 @@
+/workspaces/CSharp/Async_Await/bin/Debug/net8.0/Async_Await
+/workspaces/CSharp/Async_Await/bin/Debug/net8.0/Async_Await.deps.json
+/workspaces/CSharp/Async_Await/bin/Debug/net8.0/Async_Await.runtimeconfig.json
+/workspaces/CSharp/Async_Await/bin/Debug/net8.0/Async_Await.dll
+/workspaces/CSharp/Async_Await/bin/Debug/net8.0/Async_Await.pdb
+/workspaces/CSharp/Async_Await/obj/Debug/net8.0/Async_Await.GeneratedMSBuildEditorConfig.editorconfig
+/workspaces/CSharp/Async_Await/obj/Debug/net8.0/Async_Await.AssemblyInfoInputs.cache
+/workspaces/CSharp/Async_Await/obj/Debug/net8.0/Async_Await.AssemblyInfo.cs
+/workspaces/CSharp/Async_Await/obj/Debug/net8.0/Async_Await.csproj.CoreCompileInputs.cache
+/workspaces/CSharp/Async_Await/obj/Debug/net8.0/Async_Await.dll
+/workspaces/CSharp/Async_Await/obj/Debug/net8.0/refint/Async_Await.dll
+/workspaces/CSharp/Async_Await/obj/Debug/net8.0/Async_Await.pdb
+/workspaces/CSharp/Async_Await/obj/Debug/net8.0/Async_Await.genruntimeconfig.cache
+/workspaces/CSharp/Async_Await/obj/Debug/net8.0/ref/Async_Await.dll

Async_Await/obj/Debug/net8.0/Async_Await.genruntimeconfig.cache

@@ -0,0 +1 @@
+735e7f2d774271d1780a96fe641c2f5ec6cf42f9b6bbfa8ed546e26d04a0fe35

Async_Await/obj/project.assets.json

@@ -0,0 +1,71 @@
+{
+  "version": 3,
+  "targets": {
+    "net8.0": {}
+  },
+  "libraries": {},
+  "projectFileDependencyGroups": {
+    "net8.0": []
+  },
+  "packageFolders": {
+    "/root/.nuget/packages/": {}
+  },
+  "project": {
+    "version": "1.0.0",
+    "restore": {
+      "projectUniqueName": "/workspaces/CSharp/Async_Await/Async_Await.csproj",
+      "projectName": "Async_Await",
+      "projectPath": "/workspaces/CSharp/Async_Await/Async_Await.csproj",
+      "packagesPath": "/root/.nuget/packages/",
+      "outputPath": "/workspaces/CSharp/Async_Await/obj/",
+      "projectStyle": "PackageReference",
+      "configFilePaths": [
+        "/root/.nuget/NuGet/NuGet.Config"
+      ],
+      "originalTargetFrameworks": [
+        "net8.0"
+      ],
+      "sources": {
+        "https://api.nuget.org/v3/index.json": {}
+      },
+      "frameworks": {
+        "net8.0": {
+          "targetAlias": "net8.0",
+          "projectReferences": {}
+        }
+      },
+      "warningProperties": {
+        "warnAsError": [
+          "NU1605"
+        ]
+      },
+      "restoreAuditProperties": {
+        "enableAudit": "true",
+        "auditLevel": "low",
+        "auditMode": "direct"
+      }
+    },
+    "frameworks": {
+      "net8.0": {
+        "targetAlias": "net8.0",
+        "imports": [
+          "net461",
+          "net462",
+          "net47",
+          "net471",
+          "net472",
+          "net48",
+          "net481"
+        ],
+        "assetTargetFallback": true,
+        "warn": true,
+        "frameworkReferences": {
+          "Microsoft.NETCore.App": {
+            "privateAssets": "all"
+          }
+        },
+        "runtimeIdentifierGraphPath": "/usr/share/dotnet/sdk/8.0.410/PortableRuntimeIdentifierGraph.json"
+      }
+    }
+  }
+}

Async_Await/obj/project.nuget.cache

@@ -0,0 +1,8 @@
+{
+  "version": 2,
+  "dgSpecHash": "WpEPBuOGmH8=",
+  "success": true,
+  "projectFilePath": "/workspaces/CSharp/Async_Await/Async_Await.csproj",
+  "expectedPackageFiles": [],
+  "logs": []
+}