Add GitHub Actions CI to replace AppVeyor and fix build errors

.github/workflows/dotnet-core.yml

@@ -1,25 +1,52 @@
-name: .NET Core
+name: .NET CI
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main, master ]
   pull_request:
-    branches: [ master ]
+    branches: [ main, master ]
 
 jobs:
   build:
-
-    runs-on: ubuntu-latest
-
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+
     steps:
-    - uses: actions/checkout@v2
-    - name: Setup .NET Core
-      uses: actions/setup-dotnet@v1
+    - uses: actions/checkout@v4
+
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 3.1.301
-    - name: Install dependencies
+        dotnet-version: |
+          6.0.x
+          8.0.x
+          9.0.x
+
+    - name: Restore dependencies
       run: dotnet restore
+
     - name: Build
       run: dotnet build --configuration Release --no-restore
+
     - name: Test
-      run: dotnet test --no-restore --verbosity normal
+      run: dotnet test --configuration Release --no-build --verbosity normal --logger "trx;LogFileName=test-results.trx"
+
+    - name: Upload test results
+      if: always()
+      uses: actions/upload-artifact@v4
+      with:
+        name: test-results-${{ matrix.os }}
+        path: '**/test-results.trx'
+
+    - name: Pack NuGet package
+      if: matrix.os == 'ubuntu-latest'
+      run: dotnet pack --configuration Release --no-build --output ./artifacts
+
+    - name: Upload NuGet package
+      if: matrix.os == 'ubuntu-latest'
+      uses: actions/upload-artifact@v4
+      with:
+        name: nuget-package
+        path: ./artifacts/*.nupkg

Chsword.Excel2Object.sln

@@ -7,7 +7,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 	ProjectSection(SolutionItems) = preProject
 		.gitattributes = .gitattributes
 		.gitignore = .gitignore
-		appveyor.yml = appveyor.yml
+		.github\workflows\dotnet-core.yml = .github\workflows\dotnet-core.yml
 		ExcelFunctions.md = ExcelFunctions.md
 		README.md = README.md
 	EndProjectSection

Chsword.Excel2Object/Internal/ExcelConstants.cs

@@ -43,6 +43,7 @@ public static class DateFormats
         /// This array is intended for use when attempting to parse date/time values from Excel cells that may be formatted in a variety of ways.
         /// </remarks>
         public static readonly string[] CommonDateTimeFormats = 
+        [
             // ISO 8601 formats
             "yyyy-MM-ddTHH:mm:ss",
             "yyyy-MM-ddTHH:mm:ssZ",
@@ -99,6 +100,6 @@ public static class DateFormats
             "hh:mm tt",
             "h:mm:ss tt",
             "h:mm tt"
-        };
+        ];
     }
 }

README.md

@@ -2,7 +2,7 @@
 
 [![install from nuget](http://img.shields.io/nuget/v/Chsword.Excel2Object.svg?style=flat-square)](https://www.nuget.org/packages/Chsword.Excel2Object)
 [![release](https://img.shields.io/github/release/chsword/Excel2Object.svg?style=flat-square)](https://github.com/chsword/Excel2Object/releases)
-[![Build status](https://ci.appveyor.com/api/projects/status/4po2h27j7yg4bph5/branch/master?svg=true)](https://ci.appveyor.com/project/chsword/excel2object)
+[![Build status](https://github.com/chsword/Excel2Object/actions/workflows/dotnet-core.yml/badge.svg)](https://github.com/chsword/Excel2Object/actions/workflows/dotnet-core.yml)
 [![CodeFactor](https://www.codefactor.io/repository/github/chsword/excel2object/badge)](https://www.codefactor.io/repository/github/chsword/excel2object)
 
 Excel 与 .NET 对象互相转换 / Excel convert to .NET Object and vice versa.

README_EN.md

@@ -2,7 +2,7 @@
 
 [![install from nuget](http://img.shields.io/nuget/v/Chsword.Excel2Object.svg?style=flat-square)](https://www.nuget.org/packages/Chsword.Excel2Object)
 [![release](https://img.shields.io/github/release/chsword/Excel2Object.svg?style=flat-square)](https://github.com/chsword/Excel2Object/releases)
-[![Build status](https://ci.appveyor.com/api/projects/status/4po2h27j7yg4bph5/branch/master?svg=true)](https://ci.appveyor.com/project/chsword/excel2object)
+[![Build status](https://github.com/chsword/Excel2Object/actions/workflows/dotnet-core.yml/badge.svg)](https://github.com/chsword/Excel2Object/actions/workflows/dotnet-core.yml)
 [![CodeFactor](https://www.codefactor.io/repository/github/chsword/excel2object/badge)](https://www.codefactor.io/repository/github/chsword/excel2object)
 
 Excel convert to .NET Object / .NET Object convert to Excel.