使用EPPlus,我想读取一个excel表,然后将每列的所有内容存储到相应的List中.我希望它能识别表的标题并根据它对内容进行分类.
例如,如果我的excel表如下：
Id Name Gender 1 John Male 2 Maria Female 3 Daniel Unknown
我希望数据存储在List< ExcelData>中哪里
public class ExcelData
{
public string Id { get; set; }
public string Name { get; set; }
public string Gender { get; set; }
}
foreach (var data in ThatList)
{
Console.WriteLine(data.Id + data.Name + data.Gender);
}
它会给我这个输出：
1JohnMale 2MariaFemale 3DanielUnknown
这真的是我得到的：
var package = new ExcelPackage(new FileInfo(@"C:\ExcelFile.xlsx")); ExcelWorksheet sheet = package.Workbook.Worksheets[1]; var table = sheet.Tables.First(); table.Columns.Something //I guess I can use this to do what I want
请帮忙 ：(
我花了很长时间搜索关于此的示例代码,以便我可以从中学习,但无济于事.我也理解ExcelToLinQ设法做到这一点,但它无法识别表.
解决方法
没有原生,但如果你使用我在这篇文章中添加的内容,那该怎么办：
How to parse excel rows back to types using EPPlus
如果您只想将其指向一个表,则需要对其进行修改.这样的事情应该这样做：
public static IEnumerable<T> ConvertTableToObjects<T>(this ExcelTable table) where T : new()
{
//DateTime Conversion
var convertDateTime = new Func<double,DateTime>(excelDate =>
{
if (excelDate < 1)
throw new ArgumentException("Excel dates cannot be smaller than 0.");
var dateOfReference = new DateTime(1900,1,1);
if (excelDate > 60d)
excelDate = excelDate - 2;
else
excelDate = excelDate - 1;
return dateOfReference.AddDays(excelDate);
});
//Get the properties of T
var tprops = (new T())
.GetType()
.GetProperties()
.ToList();
//Get the cells based on the table address
var groups = table.WorkSheet.Cells[table.Address.Start.Row,table.Address.Start.Column,table.Address.End.Row,table.Address.End.Column]
.GroupBy(cell => cell.Start.Row)
.ToList();
//Assume the second row represents column data types (big assumption!)
var types = groups
.Skip(1)
.First()
.Select(rcell => rcell.Value.GetType())
.ToList();
//Assume first row has the column names
var colnames = groups
.First()
.Select((hcell,idx) => new { Name = hcell.Value.ToString(),index = idx })
.Where(o => tprops.Select(p => p.Name).Contains(o.Name))
.ToList();
//Everything after the header is data
var rowvalues = groups
.Skip(1) //Exclude header
.Select(cg => cg.Select(c => c.Value).ToList());
//Create the collection container
var collection = rowvalues
.Select(row =>
{
var tnew = new T();
colnames.ForEach(colname =>
{
//This is the real wrinkle to using reflection - Excel stores all numbers as double including int
var val = row[colname.index];
var type = types[colname.index];
var prop = tprops.First(p => p.Name == colname.Name);
//If it is numeric it is a double since that is how excel stores all numbers
if (type == typeof(double))
{
//UnBox it
var unBoxedVal = (double)val;
//FAR FROM A COMPLETE LIST!!!
if (prop.PropertyType == typeof(Int32))
prop.SetValue(tnew,(int)unBoxedVal);
else if (prop.PropertyType == typeof(double))
prop.SetValue(tnew,unBoxedVal);
else if (prop.PropertyType == typeof(DateTime))
prop.SetValue(tnew,convertDateTime(unBoxedVal));
else
throw new NotImplementedException(String.Format("Type '{0}' not implemented yet!",prop.PropertyType.Name));
}
else
{
//Its a string
prop.SetValue(tnew,val);
}
});
return tnew;
});
//Send it back
return collection;
}
这是一种测试方法：
[TestMethod]
public void Table_To_Object_Test()
{
//Create a test file
var fi = new FileInfo(@"c:\temp\Table_To_Object.xlsx");
using (var package = new ExcelPackage(fi))
{
var workbook = package.Workbook;
var worksheet = workbook.Worksheets.First();
var ThatList = worksheet.Tables.First().ConvertTableToObjects<ExcelData>();
foreach (var data in ThatList)
{
Console.WriteLine(data.Id + data.Name + data.Gender);
}
package.Save();
}
}
在控制台中给出了这个：
1JohnMale 2MariaFemale 3DanielUnknown
如果Id字段是excel中的数字或字符串,请注意,因为类需要字符串.
