Question

我有一个界面喜欢,

public interface Details
{
    int Id { get; set; }
    string Name { get; set; } 
}

我有一个方法在另一个类中像

public void GetDetails()      
{ 
    List<Details> lstDetails = new List<Details>();        
    DetailsImpl objDetailsImpl;
    Details objDetails = new DetailsImpl();
    for (int i = 1; i <= 2; i++)
    {
        objDetailsImpl = new DetailsImpl(); //The **DetailsImpl** class is given below
        objDetails.Id = i;
        if(i==1)
           objDetails.Name = "FirstName";
        else
           objDetails.Name = "SecondName";
        lstDetails.Add(objDetails);
    }
    objDetailsImpl.InsertRecords(lstDetails);  
}

我写下“强” InsertRecords

public class DetailsImpl : Details
{
    Dictionary<object, object> objDictionary = new Dictionary<object, object>();
    public string Name { get; set; }
    public int Id { get; set; }

    public int InsertRecords(List<Details> lstDetails)
    {
        for (int i = 0; i < lstDetails.Count; i++)
        {
            //i want to get the integer value "Id" from List(lstDetails)
            Id = //How to get the Id value based on count, now the <lstDetails> count is 2

            //i want to get the Name object value also, how to i get???
            Name = Convert.ToString(String.Join(",",lstDetails.Select(s => s.Name).ToArray()));
            //If i using the above line for getting **Name** value means, its comes like "FirstName,LastName", but i want **Name** value based on row.....


            objDictionary.Clear();
            objDictionary.Add("@Id",Id);
            objDictionary.Add("@Id",Name);
            //Here i passed this parameter to "ExecuteNonQry" method for insert operations
            ExecuteNonQry("sp_name",objDictonary,CommandType.StoredProcedure);
        }
        return 1;
    }
}

我要根据列表数获得 < 坚固> ID, 名称 < / 坚固 > 对象值。如何解决这个问题?

Answer 1

Name 元素的属性 >



lstDetails[i].Name


值得指出的是,您确实有  not  的有 List<>  您有 List <T>  - 您没有告诉我们 T 是什么。

Answer 2

您正在试图写入

String.Join(", ", list.Select(o => o.Name))

Answer 3

假设您的列表有多个详细内容类型对象,详细内容如下:

public class Detail
{
    public int Id{get;set;}
    public string Name {get;set;}
}

现在你有了一份列表,其中有两个细节对象

lstDetails.Add(new Detail(){Id = 1, Name = "John"});
lstDetails.Add(new Detail(){Id = 2, Name = "Charlie"});

如果您现在想要 strvaluue 包含 John, Charlie 一旦循环完成, 您可以使用下面的代码而无需循环

strValue = String.Join(",", lstDetails.Select(s => s.Name).ToArray());

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