添加项目文件。

2026-07-14 13:55:17 +08:00
parent 63759495f2
commit 8bbdf78731
335 changed files with 81415 additions and 0 deletions
@@ -0,0 +1,92 @@
+using OfficeOpenXml;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.IO;
+using System.Linq;
+
+namespace JY.Utility
+{
+    public static class ExcelImporter
+    {
+        public static List<T> Import<T>(string filePath, string sheetName = "Sheet1") where T : new()
+        {
+            // 设置 LicenseContext（非商业用途）
+            ExcelPackage.License.SetNonCommercialPersonal("EVE");
+
+            if (!File.Exists(filePath))
+            {
+                throw new FileNotFoundException("Excel文件不存在", filePath);
+            }
+
+            var result = new List<T>();
+            var fileInfo = new FileInfo(filePath);
+
+            using (var package = new ExcelPackage(fileInfo))
+            {
+                var worksheet = package.Workbook.Worksheets.FirstOrDefault(w => w.Name.Equals(sheetName, StringComparison.OrdinalIgnoreCase));
+                if (worksheet == null)
+                {
+                    throw new ArgumentException($"指定的工作表 '{sheetName}' 不存在");
+                }
+
+                if (worksheet.Dimension == null)
+                {
+                    return result;
+                }
+
+                var dimension = worksheet.Dimension;
+                var headers = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
+
+                for (int col = dimension.Start.Column; col <= dimension.End.Column; col++)
+                {
+                    var headerValue = worksheet.Cells[1, col].Value?.ToString().Trim();
+                    if (!string.IsNullOrEmpty(headerValue))
+                    {
+                        headers[headerValue] = col;
+                    }
+                }
+
+                var properties = TypeDescriptor.GetProperties(typeof(T));
+
+                for (int row = dimension.Start.Row + 1; row <= dimension.End.Row; row++)
+                {
+                    var item = new T();
+                    bool hasData = false;
+
+                    foreach (PropertyDescriptor property in properties)
+                    {
+                        if (headers.TryGetValue(property.Description, out int col))
+                        {
+                            var cellValue = worksheet.Cells[row, col].Value;
+
+                            if (cellValue != null)
+                            {
+                                hasData = true;
+                                var stringValue = cellValue.ToString().Trim();
+
+                                try
+                                {
+                                    var targetType = Nullable.GetUnderlyingType(property.PropertyType) ?? property.PropertyType;
+                                    var convertedValue = Convert.ChangeType(stringValue, targetType);
+                                    property.SetValue(item, convertedValue);
+                                }
+                                catch
+                                {
+                                    property.SetValue(item, null);
+                                }
+                            }
+                        }
+                    }
+
+                    if (hasData)
+                    {
+                        result.Add(item);
+                    }
+                }
+            }
+
+            return result;
+        }
+    }
+}