[New] Support DateTimeOffset and ExcelFormat mini-software#430 (via @Lightczx , @shps951023 )

Author: shps951023

docs/README.md

@@ -26,6 +26,8 @@
 
 ### 1.27.0
 
+- [New] Support DateTimeOffset and ExcelFormat #430 (via @Lightczx , @shps951023 )
+
 - [Optimization] SaveAs by datareader support dimension #231 (via @shps951023)
 
 ### 1.26.7

docs/README.zh-CN.md

@@ -29,6 +29,8 @@
 
 ### 1.27.0
 
+- [New] 支持 DateTimeOffset and ExcelFormat #430 (via @Lightczx , @shps951023 )
+
 - [Optimization] SaveAs by datareader 支持 dimension #231 (via @shps951023)
 
 ### 1.26.7

docs/README.zh-Hant.md

@@ -28,6 +28,8 @@
 
 ### 1.27.0
 
+- [New] 支持 DateTimeOffset and ExcelFormat #430 (via @Lightczx , @shps951023 )
+
 - [Optimization] SaveAs by datareader 支持 dimension #231 (via @shps951023)
 
 ### 1.26.7

src/MiniExcel/Utils/TypeHelper.cs

@@ -81,6 +81,21 @@ public static bool IsNumericType(Type type, bool isNullableUnderlyingType = fals
             {
                 newValue = Guid.Parse(itemValue.ToString());
             }
+            else if (pInfo.ExcludeNullableType == typeof(DateTimeOffset))
+            {
+                var vs = itemValue?.ToString();
+                if (pInfo.ExcelFormat != null)
+                {
+                    if (DateTimeOffset.TryParseExact(vs, pInfo.ExcelFormat, CultureInfo.InvariantCulture, DateTimeStyles.None, out var _v))
+                    {
+                        newValue = _v;
+                    }
+                }
+                else if (DateTimeOffset.TryParse(vs, _config.Culture, DateTimeStyles.None, out var _v))
+                    newValue = _v;
+                else
+                    throw new InvalidCastException($"{vs} can't cast to datetime");
+            }
             else if (pInfo.ExcludeNullableType == typeof(DateTime))
             {
                 // fix issue 257 https://github.com/shps951023/MiniExcel/issues/257
@@ -94,11 +109,11 @@ public static bool IsNumericType(Type type, bool isNullableUnderlyingType = fals
                 var vs = itemValue?.ToString();
                 if (pInfo.ExcelFormat != null)
                 {
-                    if (DateTime.TryParseExact(vs, pInfo.ExcelFormat, CultureInfo.InvariantCulture, DateTimeStyles.None, out var _v))
+                    if( pInfo.Property.PropertyType == typeof(DateTimeOffset) && DateTimeOffset.TryParseExact(vs, pInfo.ExcelFormat, CultureInfo.InvariantCulture, DateTimeStyles.None, out var _v2))
                     {
-                        newValue = _v;
+                        newValue = _v2;
                     }
-                    else if(DateTimeOffset.TryParseExact(vs, pInfo.ExcelFormat, CultureInfo.InvariantCulture, DateTimeStyles.None, out var _v))
+                    else if (DateTime.TryParseExact(vs, pInfo.ExcelFormat, CultureInfo.InvariantCulture, DateTimeStyles.None, out var _v))
                     {
                         newValue = _v;
                     }

tests/MiniExcelTests/MiniExcelIssueTests.cs

@@ -34,6 +34,28 @@ public MiniExcelIssueTests(ITestOutputHelper output)
             this.output = output;
         }
 
+
+        /// <summary>
+        /// Exception : MiniExcelLibs.Exceptions.ExcelInvalidCastException: 'ColumnName : Date, CellRow : 2, Value : 2021-01-31 10:03:00 +08:00, it can't cast to DateTimeOffset type.'
+        /// </summary>
+        [Fact]
+        public void TestIssue430()
+        {
+            var outputPath = PathHelper.GetTempFilePath();
+            var value = new[] {
+                new TestIssue430Dto{ Date=DateTimeOffset.Parse("2021-01-31 10:03:00 +05:00")}
+            };
+            MiniExcel.SaveAs(outputPath, value);
+            var rows = MiniExcel.Query<TestIssue430Dto>(outputPath).ToArray();
+            Assert.Equal("2021-01-31 10:03:00 +05:00", rows[0].Date.ToString("yyyy-MM-dd HH:mm:ss zzz"));
+        }
+
+        public class TestIssue430Dto
+        {
+            [ExcelFormat("yyyy-MM-dd HH:mm:ss zzz")]
+            public DateTimeOffset Date { get; set; }
+        }
+
         [Fact]
         public void TestIssue_DataReaderSupportDimension()
         {