在做通用导入导出的时候,最关键的应该就是实体导出导入的顺序了,但是编译器在编译的时候又无法自定义属性编译的顺序,所以需要一个自定义的特性标签来指定实体类导出的顺序,然后通过自定义的比较器将属性排序
因为wcf中无法对实体类的自定义特性进行描述,所以获取不到我们自定义的OrderAttribute,虽然DataMemberAttribute中的Order属性是描述属性序列化的顺序,但是因为没有对序列化排序没有特殊的要求,于是就用它代替了,起初发射之后总是倒数两个Order属性的值是正常的,其他的都为-1,后来发现生成的顺序也是按Order生成的,于是就没有深究了(如果有深入研究的朋友 希望指点一下)。
class PRogram { static void Main(string[] args) { //过滤掉没有打排序标签的属性 List<PropertyInfo> pis = typeof(People).GetProperties().Where(p => p.GetCustomAttributes(typeof(OrderAttribute), false).Any()).ToList(); //自定义比较器排序 pis.Sort(new OrderComparator()); Console.ReadKey(); } } //自定义排序特性 public class OrderAttribute : Attribute { public OrderAttribute(int order) { this.PropertyOrder = order; } public int PropertyOrder { get; set; } } //实体类 public class People { public int ID { get; set; } [Order(1)] public string Name { get; set; } [Order(3)] public int Age { get; set; } [Order(2)] public bool Gender { get; set; } [Order(5)] public double Height { get; set; } [Order(4)] public double Weight { get; set; } } //自定义属性比较器 public class OrderComparator : IComparer<PropertyInfo> { public int Compare(PropertyInfo x, PropertyInfo y) { OrderAttribute xOrderAttribute = x.GetCustomAttributes(typeof(OrderAttribute), false).FirstOrDefault() as OrderAttribute; OrderAttribute yOrderAttribute = y.GetCustomAttributes(typeof(OrderAttribute), false).FirstOrDefault() as OrderAttribute; return xOrderAttribute.PropertyOrder - yOrderAttribute.PropertyOrder; } }
目前使用过操作excel的方式有NPOI和,微软提供的Microsoft.Office.Interop.Excel性能太牛X了,所以就不敢贴出来了
一、使用NPOI
NPOI导出:
/// <summary> /// 保存到硬盘 /// </summary> /// <param name="path">保存路径@"c:/book1.xls"</param> /// <param name="data">数据源</param> /// <param name="columnsName">excel列名</param> public void SaveToFile<T>(List<T> data, string path, List<string> excelColumnsTitle) { if (Path.GetExtension(path).Equals(".xls")) { //excel2003 SaveToFile2003<T>(data, path, excelColumnsTitle); } else if (Path.GetExtension(path).Equals(".xlsx")) { //excel2007 SaveToFile2007<T>(data, path, excelColumnsTitle); } else { throw new Exception("请传入正确的excel路径"); } }
SaveToFile2003
/// <summary> /// excel2003导出 /// </summary> private void SaveToFile2003<T>(List<T> data, string path, List<string> excelColumnsTitle) { NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook(); NPOI.SS.UserModel.ISheet sheet = book.CreateSheet("Sheet"); //添加一个sheet //给sheet1添加第一行的头部标题 NPOI.SS.UserModel.IRow row1 = sheet.CreateRow(0); for (int i = 0; i < excelColumnsTitle.Count; i++) { row1.CreateCell(i).SetCellValue(excelColumnsTitle[i]); } //过滤属性 List<PropertyInfo> pis = typeof(T).GetProperties().Where(p => p.GetCustomAttributes(typeof(OrderAttribute), false).Any()).ToList(); pis.Sort(new OrderComparator()); //金额格式 NPOI.SS.UserModel.ICellStyle cellStyleDecimal = book.CreateCellStyle(); NPOI.SS.UserModel.IDataFormat formatDecimal = book.CreateDataFormat(); cellStyleDecimal.DataFormat = NPOI.HSSF.UserModel.HSSFDataFormat.GetBuiltinFormat("0.00"); //单元格格式为“0.00”来表示,"¥#,##0"美元显示,"0.00%"百分比显示 //日期格式 NPOI.SS.UserModel.ICellStyle cellStyleDateTime = book.CreateCellStyle(); NPOI.SS.UserModel.IDataFormat formatDateTime = book.CreateDataFormat(); cellStyleDateTime.DataFormat = formatDateTime.GetFormat("yyyy-m"); //将数据逐步写入sheet1各个行 for (int i = 0; i < data.Count; i++) { NPOI.SS.UserModel.IRow rowtemp = sheet.CreateRow(i + 1); for (int j = 0; j < pis.Count; j++) { NPOI.SS.UserModel.ICell cell = rowtemp.CreateCell(j); if (pis[j].PropertyType.IsAssignableFrom(typeof(string))) { cell.SetCellValue(pis[j].GetValue(data[i], null).ToString()); } else if (pis[j].PropertyType.IsAssignableFrom(typeof(int))) { cell.SetCellValue(Convert.ToInt32(pis[j].GetValue(data[i], null))); } else if (pis[j].PropertyType.IsAssignableFrom(typeof(decimal))) { cell.CellStyle = cellStyleDecimal; cell.SetCellValue(Convert.ToDouble(pis[j].GetValue(data[i], null))); } else if (pis[j].PropertyType.IsAssignableFrom(typeof(DateTime))) { cell.CellStyle = cellStyleDateTime; cell.SetCellValue(Convert.ToDateTime(pis[j].GetValue(data[i], null))); } else if (pis[j].PropertyType.IsAssignableFrom(typeof(double))) { cell.CellStyle = cellStyleDecimal; cell.SetCellValue(Convert.ToDouble(pis[j].GetValue(data[i], null))); } else if (pis[j].PropertyType.IsAssignableFrom(typeof(bool))) { cell.SetCellValue(Convert.ToBoolean(pis[j].GetValue(data[i], null))); } } } // 写入到客户端 using (FileStream fs = new FileStream(path, FileMode.OpenOrCreate, Fileaccess.Write)) { book.Write(fs); } }
SaveToFile2007
/// <summary> /// excel2007导出 /// </summary> private void SaveToFile2007<T>(List<T> data, string path, List<string> excelColumnsTitle) { NPOI.XSSF.UserModel.XSSFWorkbook book = new NPOI.XSSF.UserModel.XSSFWorkbook(); NPOI.SS.UserModel.ISheet sheet = book.CreateSheet("Sheet"); //添加一个sheet //给sheet1添加第一行的头部标题 NPOI.SS.UserModel.IRow row1 = sheet.CreateRow(0); for (int i = 0; i < excelColumnsTitle.Count; i++) { row1.CreateCell(i).SetCellValue(excelColumnsTitle[i]); } //过滤属性 List<PropertyInfo> pis = typeof(T).GetProperties().Where(p => p.GetCustomAttributes(typeof(OrderAttribute), false).Any()).ToList(); pis.Sort(new OrderComparator()); //金额格式 NPOI.SS.UserModel.ICellStyle cellStyleDecimal = book.CreateCellStyle(); NPOI.SS.UserModel.IDataFormat formatDecimal = book.CreateDataFormat(); cellStyleDecimal.DataFormat = NPOI.HSSF.UserModel.HSSFDataFormat.GetBuiltinFormat("0.00"); //单元格格式为“0.00”来表示,"¥#,##0"美元显示,"0.00%"百分比显示 //日期格式 NPOI.SS.UserModel.ICellStyle cellStyleDateTime = book.CreateCellStyle(); NPOI.SS.UserModel.IDataFormat formatDateTime = book.CreateDataFormat(); cellStyleDateTime.DataFormat = formatDateTime.GetFormat("yyyy-m"); //将数据逐步写入sheet1各个行 for (int i = 0; i < data.Count; i++) { NPOI.SS.UserModel.IRow rowtemp = sheet.CreateRow(i + 1); for (int j = 0; j < pis.Count; j++) { NPOI.SS.UserModel.ICell cell = r
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