C#开发教程之利用特性自定义数据导出到Excel

using System.ComponentModel;
using System.Reflection;
using System.Runtime.Serialization;
public class OrderReport
{
[DisplayName("订单编号")]
public string orderNo { get; set; }
[IgnoreDataMember]
public DateTime orderTime { get; set; }
[DisplayName("订单时间")]
public String orderTime_fomart { get { return orderTime.ToShortDateString(); } }
[DisplayName("商品编码")]
public string itemCode { get; set; }
[DisplayName("商品名称")]
public string itemName { get; set; }
} 

/// <summary>
/// 导出类
/// </summary>
public class ExportHandle
{
/// <summary>
/// 挂起订单报表导出
/// </summary>
public static void execExportOrderReport()
{
var orderReportList = new List<OrderReport>()
{
new OrderReport() { orderNo= "XD00001",orderTime=DateTime.Now, itemCode="G001" ,itemName="辣条"} ,
new OrderReport() { orderNo= "XD00002", orderTime=DateTime.Now,itemCode="G002" ,itemName="茶蛋"} ,
new OrderReport() { orderNo= "XD00003", orderTime=DateTime.Now,itemCode="G003" ,itemName="切糕"} ,
new OrderReport() { orderNo= "XD00004", orderTime=DateTime.Now,itemCode="G004" ,itemName="大虾"} ,
new OrderReport() { orderNo= "XD00005", orderTime=DateTime.Now,itemCode="G005" ,itemName="帝王蟹"}
};
string path = "OrderReport.xlsx";
Console.WriteLine("开始执行导出");
OutDataToExcel(orderReportList, "订单报表", path);
Console.WriteLine("导出完成：位置"+path);
}
/// <summary>
/// 导出方法
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="list">导出的数据list</param>
/// <param name="title">数据类容标题</param>
/// <param name="path">导出excel存放路径</param>
public static void OutDataToExcel<T>(List<T> list, string title, string path)
{
Workbook workbook = new Workbook(); //工作簿 
Worksheet sheet = workbook.Worksheets[0]; //工作表 
sheet.IsGridlinesVisible = false;//去掉初始单元线
Cells cells = sheet.Cells;//单元格 
//为标题设置样式 
Style styleTitle = workbook.CreateStyle();//新增样式 
styleTitle.HorizontalAlignment = TextAlignmentType.Center;//文字居中 
styleTitle.Font.Name = "微软雅黑";//文字字体 
styleTitle.Font.Size = 18;//文字大小 
styleTitle.Font.IsBold = true;//粗体 
//样式1 标题下方的日期
Style style1 = workbook.CreateStyle();//新增样式 
style1.HorizontalAlignment = TextAlignmentType.Center;//文字居中 
style1.Font.Name = "微软雅黑";//文字字体 
style1.Font.Size = 12;//文字大小 
//样式2 列名
Style style2 = workbook.CreateStyle();//新增样式 
style2.HorizontalAlignment = TextAlignmentType.Center;//文字居中 
style2.Font.Name = "微软雅黑";//文字字体 
style2.Font.Size = 12;//文字大小 
style2.Font.IsBold = true;//粗体 
style2.Borders[BorderType.LeftBorder].LineStyle = CellBorderType.Thin;
style2.Borders[BorderType.RightBorder].LineStyle = CellBorderType.Thin;
style2.Borders[BorderType.TopBorder].LineStyle = CellBorderType.Thin;
style2.Borders[BorderType.BottomBorder].LineStyle = CellBorderType.Thin;
//样式3 数据的样式
Style style3 = workbook.CreateStyle();//新增样式 
style3.HorizontalAlignment = TextAlignmentType.Center;//文字居中 
style3.Font.Name = "微软雅黑";//文字字体 
style3.Font.Size = 10;//文字大小 
style3.Borders[BorderType.LeftBorder].LineStyle = CellBorderType.Thin;
style3.Borders[BorderType.RightBorder].LineStyle = CellBorderType.Thin;
style3.Borders[BorderType.TopBorder].LineStyle = CellBorderType.Thin;
style3.Borders[BorderType.BottomBorder].LineStyle = CellBorderType.Thin;
if (list.Count == 0) return;
var t = list.First().GetType();//获取列表的类的属性
//通过反射筛选忽略掉[IgnoreDataMemberAttribute]的字段
var properties = t.GetProperties().Where(x => x.GetCustomAttribute<IgnoreDataMemberAttribute>() == null);
int Colnum = properties.Count();//表格列数 
int Rownum = list.Count;//表格行数 
//生成行1 标题行 
cells.Merge(0, 0, 1, Colnum);//合并单元格 
cells[0, 0].PutValue(title);//填写内容 
cells[0, 0].SetStyle(styleTitle);
cells.SetRowHeight(0, 38);//行高
//生成行2 日期 
cells.Merge(1, 0, 1, Colnum);//合并单元格 
cells[1, 0].PutValue(DateTime.Now.ToShortDateString());//填写内容 
cells[1, 0].SetStyle(style1);
cells.SetRowHeight(1, 20);//行高
//列名及数据行
int i = 0;
foreach (var item in properties)
{
var itemType = t.GetProperty(item.Name);
var colName = itemType.GetCustomAttribute<DisplayNameAttribute>().DisplayName;//反射获取字段的DisplayName特性值
cells[2, i].PutValue(colName);
cells[2, i].SetStyle(style2);
cells.SetColumnWidth(i, colName.Length * 3);//设置列宽
int k = 0;
foreach (var rowdata in list)
{
//反射遍历添加数据
object value = rowdata.GetType().GetProperty(item.Name).GetValue(rowdata, null);
string ss = value == null ? "" : value.ToString();
cells[3 + k, i].PutValue(ss);
cells[3 + k, i].SetStyle(style3);
cells.SetRowHeight(3 + k, 18);//设置行高
k++;
}
i++;
}
workbook.Save(path);//生成Excel
}
} 

var properties = t.GetProperties().Where(x => AttributeAccessor.GetAttribute<IgnoreDataMemberAttribute>(x) == null);

foreach (var item in properties){}遍历实体类的属性相当于DataTable循环读取数据 
object value = rowdata.GetType().GetProperty(item.Name).GetValue(rowdata, null); 通过属性名称获取属性值。
通过以上两个步骤，实现自动
}