dotnet upgrade

DotNetSolutionTools.App/ViewModels/MainWindowViewModel.cs

@@ -153,6 +153,24 @@ public partial class MainWindowViewModel : ViewModelBase
             ParityResults?.Add(e.Message);
         }
     }
+    
+    [RelayCommand]
+    private async Task UpdateAllProjectsToNet80(CancellationToken token)
+    {
+        ErrorMessages?.Clear();
+        ParityResults.Clear();
+        ResultsLabel = string.Empty;
+        try
+        {
+            DotNetUpgrade.UpdateProjectsInSolutionToNet80(SolutionFilePath);
+            ResultsLabel = "Successfully updated all projects in solution to .NET 8";
+        }
+        catch (Exception e)
+        {
+            ResultsLabel = "Failed to update all projects in solution to .NET 8";
+            ParityResults?.Add(e.Message);
+        }
+    }
 
     [RelayCommand]
     private async Task LoadSolutionFile(CancellationToken token)

DotNetSolutionTools.App/Views/MainWindow.axaml

@@ -95,6 +95,15 @@
                         Clear bin and obj folders
                     </TextBlock>
                 </Button>
+                <Button Grid.Row="2" Grid.Column="1" MinHeight="130" Padding="10" Margin="5"
+                        HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
+                        VerticalContentAlignment="Center" HorizontalContentAlignment="Center"
+                        IsEnabled="{Binding SolutionFilePath, Mode=OneWay, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"
+                        Command="{Binding UpdateAllProjectsToNet80Command}">
+                    <TextBlock TextWrapping="Wrap">
+                        Update all projects in Solution to .NET 8.0
+                    </TextBlock>
+                </Button>
             </Grid>
         <Label HorizontalAlignment="Center" Name="ResultsLabel" Content="{Binding ResultsLabel}"></Label>
        </StackPanel>

DotNetSolutionTools.Core/DotNetUpgrade.cs

@@ -0,0 +1,36 @@
+using Microsoft.Build.Construction;
+using Microsoft.Build.Definition;
+using Microsoft.Build.Evaluation;
+
+namespace DotNetSolutionTools.Core;
+
+public static class DotNetUpgrade
+{
+    public static void UpdateProjectsInSolutionToNet80(string solutionFilePath)
+    {
+        var solutionFile = SolutionFile.Parse(solutionFilePath);
+        var csprojList = SolutionProjectParity.GetCSharpProjectObjectsFromSolutionFile(
+            solutionFile
+        );
+        UpdateProjectsToNet80(csprojList);
+    }
+
+    private static void UpdateProjectsToNet80(List<ProjectRootElement> projects)
+    {
+        foreach (var project in projects)
+        {
+            var evalProject = Project.FromProjectRootElement(project, new ProjectOptions(){LoadSettings = ProjectLoadSettings.IgnoreMissingImports});
+            var packages = evalProject.GetItems("PackageReference");
+            //packages.First().Metadata.First().UnevaluatedValue = "9.0.0";
+            var targetFramework = project.PropertyGroups
+                .SelectMany(x => x.Properties)
+                .FirstOrDefault(x => x.Name == "TargetFramework");
+            if (targetFramework?.Value is "net7.0")
+            {
+                targetFramework.Value = "net8.0";
+                project.Save();
+                FormatCsproj.FormatCsprojFile(project.FullPath);
+            }
+        }
+    }
+}