如何将列表字符串转换为datainfo对象。 [英] How convert list string into datainfo object.

问题描述

我不会将字符串显式转换为DataInfo对象。我想要一个从字符串列表转换为对象的示例，稍后我将用它来创建图形。



我尝试过的：

I wont explicitly convert string into DataInfo object. I am asking for an example of a conversion from the list of strings to an object that will serve me later to create a graph.

What I have tried:

public class DataInfo
{
public string Data { get; set; }

public DataInfo()
{
this.Data = Data;


}

}
//Controller
List<datainfo> DataList = new List<datainfo>();
DataList = db.Order.OrderBy (w => w.IdOrder) .ToList (); 
viewModel.ListPeriods = listOrdersUsers.OrderBy (p => p.AcceptanceDateOrder 
). Select (w => w.AcceptanceDateOrder.ToString (). Substring (0, 7)) ToList ();

//error

// Cannot implicitly convert type 'System.Collections.Generic.List<string>' to 'System.Collections.Generic.List<aplikacjahelpdesk.models.baza.datainfo>

推荐答案

ListPeriods =行上的错误是？是类型列表的ListPeriods< DataInfo>？



如果是这样，如果你看.Select你正在选择一个字符串（w.AcceptanceDateOrder.ToString（））所以当你ToList你得到一个List< string>无法分配给List< DataInfo>。所以你的Select需要返回DataInfo，以便ToList返回List< DataInfo>

Is the error on the "ListPeriods =" line? Is ListPeriods of type List<DataInfo>?

If so, if you look at the .Select you are selecting a string (w.AcceptanceDateOrder.ToString()) so when you ToList you get a List<string> which can't be assigned to List<DataInfo>. So your Select needs to return DataInfo so that ToList returns List<DataInfo>

viewModel.ListPeriods = listOrdersUsers.OrderBy (p => p.AcceptanceDateOrder 
). Select (w => new DataInfo{Data = w.AcceptanceDateOrder.ToString().Substring(0, 7)}) ToList();

List<DataInfo> DataList = new List<DataInfo>();
            DataList = listOrdersUsers.OrderBy<pre>(p => p.AcceptanceDateOrder 
). Select (w => new DataInfo{Data = w.AcceptanceDateOrder.ToString().Substring(0, 7)}) ToList();

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