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 = 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);
}
}
NPOI导入：
/// <summary>
/// 返回List数据
/// </summary>
/// <typeparam name="T">实体类</typeparam>
/// <param name="path">excel文件路径</param>
/// <returns></returns>
public List<T> ImportExcelToList<T>(string path)
{
if (Path.GetExtension(path).Equals(".xls"))
{
//excel2003
return ImportExcelToList2003<T>(path);
}
else if (Path.GetExtension(path).Equals(".xlsx"))
{
//excel2007
return ImportExcelToList2007<T>(path);
}
else
{
throw new Exception("请传入正确的excel路径");
}
}
ImportExcelToList2003
/// <summary>
/// excel2003导入
/// </summary>
private List<T> ImportExcelToList2003<T>(string path)
{
List<T> list = new List<T>();
NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook(new FileStream(path, FileMode.Open, FileAccess.Read));
NPOI.HSSF.UserModel.HSSFSheet sheet = book.GetSheet("Sheet") as NPOI.HSSF.UserModel.HSSFSheet;
if (sheet != null)
{
List<PropertyInfo> pis = typeof(T).GetProperties().Where(p => p.GetCustomAttributes(typeof(OrderAttribute), false).Any()).ToList();
pis.Sort(new OrderComparator());
//导入数据
for (int i = 1; i <= sheet.LastRowNum; i++) //获得所有行数
{
T model = Activator.CreateInstance<T>();
NPOI.SS.UserModel.IRow row = sheet.GetRow(i); //读取当前行数据
if (row != null)
{
try
{
for (int j = 0; j < row.Cells.Count; j++)
{
if (pis[j].PropertyType.IsAssignableFrom(typeof(string)))
{
pis[j].SetValue(model, row.GetCell(j).StringCellValue, null);
}
else if (pis[j].PropertyType.IsAssignableFrom(typeof(int)))
{
pis[j].SetValue(model, (int)row.GetCell(j).NumericCellValue, null);
}
else if (pis[j].PropertyType.IsAssignableFrom(typeof(decimal)))
{
pis[j].SetValue(model, (decimal)row.GetCell(j).NumericCellValue, null);
}
else if (pis[j].PropertyType.IsAssignableFrom(typeof(DateTime)))
{
pis[j].SetValue(model, row.GetCell(j).DateCellValue, null);
}
else if (pis[j].PropertyType.IsAssignableFrom(typeof(double)))
{
pis[j].SetValue(model, row.GetCell(j).NumericCellValue, null);
}
else if (pis[j].PropertyType.IsAssignableFrom(typeof(bool)))
{
pis[j].SetValue(model, row.GetCell(j).BooleanCellValue, null);
}
}
list.Add(model);
}
catch { }
}
}
}
return list;
}
ImportExcelToList2007
/// <summary>
/// excel2007导入
/// </summary>
private List<T> ImportExcelToList2007<T>(string path)
{
List<T> list = new List<T>();
NPOI.XSSF.UserModel.XSSFWorkbook book = new NPOI.XSSF.UserModel.XSSFWorkbook(new FileStream(path, FileMode.Open, FileAccess.Read));
NPOI.SS.UserModel.ISheet sheet = book.GetSheetAt(0);
if (sheet != null)
{
List<PropertyInfo> pis = typeof(T).GetProperties().Where(p => p.GetCustomAttributes(typeof(OrderAttribute), false).Any()).ToList();
pis.Sort(new OrderComparator());
//导入数据
for (int i = 1; i <= sheet.LastRowNum; i++) //获得所有行数
{
T model = Activator.CreateInstance<T>();
NPOI.SS.UserModel.IRow row = sheet.GetRow(i); //读取当前行数据
if (row != null)
{
try
{
for (int j = 0; j < row.Cells.Count; j++)
{
if (pis[j].PropertyType.IsAssignableFrom(typeof(string)))
{
pis[j].SetValue(model, row.GetCell(j).StringCellValue, null);
}
else if (pis[j].PropertyType.IsAssignableFrom(typeof(int)))
{
pis[j].SetValue(model, (int)row.GetCell(j).NumericCellValue, null);
}
else if (pis[j].PropertyType.IsAssignableFrom(typeof(decimal)))
{
pis[j].SetValue(model, (decimal)row.GetCell(j).NumericCellValue, null);
}
else if (pis[j].PropertyType.IsAssignableFrom(typeof(DateTime)))
{
pis[j].SetValue(model, row.GetCell(j).DateCellValue, null);
}
else if (pis[j].PropertyType.IsAssignableFrom(typeof(double)))
{
pis[j].SetValue(model, row.GetCell(j).NumericCellValue, null);
}
else if (pis[j].PropertyType.IsAssignableFrom(typeof(bool)))
{
pis[j].SetValue(model, row.GetCell(j).BooleanCellValue, null);
}
}
list.Add(model);
}
catch { }
}
}
}
return list;
}
二、使用Acey.ExcelX，以前的时候性能是忧于NPOI的，而且支持excel03和07，相较NPOI有时候还能省去cell类型的判断，只是是第三方收费的，所以导出后会有广告
Acey.ExcelX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)
{
IWorkbook workbook = ExcelxApplication.CreateWorkbook();
IWorksheet worksheet = workbook.Worksheets[0];
for (int i = 0; i < excelColumnsTitle.Count; i++)
{
worksheet.Cells[0, i].Value = excelColumnsTitle[i];
}
List<PropertyInfo> pis = typeof(T).GetProperties().Where(p => p.GetCustomAttributes(typeof(OrderAttribute), false).Any()).ToList();
pis.Sort(new OrderComparator());
for (int i = 0; i < data.Count; i++)
{
for (int j = 0; j < pis.Count; j++)
{
worksheet.Cells[i + 1, j].Value = pis[j].GetValue(data[i], null);
}
}
workbook.SaveAs(path);//保存到硬盘
}
Acey.ExcelX导入
/// <summary>
/// 返回List数据
/// </summary>
/// <typeparam name="T">实体类</typeparam>
/// <param name="path">excel文件路径</param>
/// <returns></returns>
public List<T> ImportExcelToList<T>(string path)
{
List<T> list = new List<T>();
Type type = typeof(T);
//创建Workbook对象通过打开指定的Excel文档。
IWorkbook workbook = ExcelxApplication.Open(path);
//获取以0为基数的Worksheet对象。
IWorksheet worksheet = workbook.Worksheets[0];
//获取工作表中最大数据行。
int maxRow = worksheet.MaxDataRow;
//获取工作表中最大数据列。
int maxCol = worksheet.MaxDataColumn;
//创建指定区域的对象。
IRange range = worksheet.Cells.CreateRange(0, 0, maxRow, maxCol);
//将该区域对象的数据导出到DataTable对象中。
DataTable table = range.ExportDataTable();
//返回该DataTable对象。
for (int row = 1; row <= maxRow; row++)
{
T model = Activator.CreateInstance<T>();
List<PropertyInfo> pis = typeof(T).GetProperties().Where(p => p.GetCustomAttributes(typeof(OrderAttribute), false).Any()).ToList();
pis.Sort(new OrderComparator());
for (int col = 0; col <= maxCol; col++)
{
ICell cell = worksheet.Cells[row, col];
if (pis[col].PropertyType.IsAssignableFrom(typeof(string)))
{
pis[col].SetValue(model, Convert.ToString(cell.Value), null);
}
else if (pis[col].PropertyType.IsAssignableFrom(typeof(int)))
{
pis[col].SetValue(model, Convert.ToInt32(cell.Value), null);
}
else if (pis[col].PropertyType.IsAssignableFrom(typeof(decimal)))
{
pis[col].SetValue(model, Convert.ToDecimal(cell.Value), null);
}
else if (pis[col].PropertyType.IsAssignableFrom(typeof(DateTime)))
{
pis[col].SetValue(model, Convert.ToDateTime(cell.Value), null);
}
else if (pis[col].PropertyType.IsAssignableFrom(typeof(double)))
{
pis[col].SetValue(model, Convert.ToDouble(cell.Value), null);
}
else if (pis[col].PropertyType.IsAssignableFrom(typeof(bool)))
{
pis[col].SetValue(model, Convert.ToBoolean(cell.Value), null);
}
}
list.Add(model);
}
return list;
}
Acey.ExcelX输出到web
/// <summary>
///输出到网页
///</summary>
///<param name="context">HttpContext</param>
///<param name="fileName">"book1.xls"</param>
///<param name="data">数据源</param>
public static void RenderToBrowser(DataTable data, HttpContext context, string fileName)
{
IWorkbook workbook = ProcessWorkBook(data);
workbook.SaveToHttpResponse(context.Response, fileName, false);//输出到网页
}
原文：http://www.cnblogs.com/NotAnEmpty/p/4036677.html