英文:
Get class properties of a specific type
问题
我有一个C#的WinForm项目。我有一个名为TopProducts的类，它有许多DataTable属性，并且我创建了一个这个类的集合。
我想要遍历这个集合并创建一个List<DataTable>。你可以在下面的GetListOfDataTables方法的注释中找到详细信息。
public class TopProducts
{
public Guid ID { get; set; }
public string No { get; set; }
public string ProductName { get; set; }
public int ProductQty { get; set; }
public int Level { get; set; }
public DataTable dtProfile { get; set; }
public DataTable dtPBMAndGlass { get; set; }
public DataTable dtArticals { get; set; }
public DataTable dtCutting { get; set; }
public DataTable dtCNC { get; set; }
public DataTable dtIFS { get; set; }
public DataTable dtIFSGlassList { get; set; }
// public DataTable MoreDataTable
}
public List<DataTable> GetListOfDataTables(List<TopProducts> ProductList)
{
List<DataTable> dtList = new List<DataTable>();
foreach (TopProducts product in ProductList)
{
//我需要类似下面的代码
//if (product.GetType().Equals(DataTable))
//{
// dtList.Add(product)
//}
}
return dtList;
}
英文:
I have a WinForm project in c#. I have class named TopProducts that has many DataTable properties and I create a collection of this class.
I want to loop over this collection and create List<Datatable>. You can find details in the comments in the GetListOfDataTables method below.
public class TopProducts
{
public Guid ID { get; set; }
public string No { get; set; }
public string ProductName { get; set; }
public int ProductQty { get; set; }
public int Level { get; set; }
public DataTable dtProfile { get; set; }
public DataTable dtPBMAndGlass { get; set; }
public DataTable dtArticals { get; set; }
public DataTable dtCutting { get; set; }
public DataTable dtCNC { get; set; }
public DataTable dtIFS { get; set; }
public DataTable dtIFSGlassList { get; set; }
// public DataTable MoreDataTable
}
public List<DataTable> GetListOfDataTables(List<TopProducts> ProductList)
{
List<DataTable> dtList = new List<DataTable>();
foreach (TopProducts product in ProductList)
{
//I need codes something similar below
//if (product.GetType().Equals(DataTable))
//{
// dtList.Add(product)
//}
}
return dtList;
}
答案1
得分: 1
似乎你的意思是使用反射来从给定的List<TopProducts>中提取DataTable属性的值并将它们展平成一个序列。如果是这样，你可以这样做：
// +
using System.Reflection;
public IEnumerable<DataTable> GetListOfDataTables(IEnumerable<TopProducts> ProductList)
=> ProductList
.SelectMany(topProduct => topProduct.GetType()
.GetProperties(BindingFlags.Instance | BindingFlags.Public)
.Where(propInfo => propInfo.PropertyType == typeof(DataTable))
.Select(propInfo => propInfo.GetValue(topProduct) as DataTable))
.Where(dt => dt != null);
英文:
It seems you mean using Reflection to extract the values of the DataTable properties from a given List<TopProducts> and flatten them in one sequence. If so, you could have:
// +
using System.Reflection;
public IEnumerable<DataTable> GetListOfDataTables(IEnumerable<TopProducts> ProductList)
=> ProductList
.SelectMany(topProduct => topProduct.GetType()
.GetProperties(BindingFlags.Instance | BindingFlags.Public)
.Where(propInfo => propInfo.PropertyType == typeof(DataTable))
.Select(propInfo => propInfo.GetValue(topProduct) as DataTable))
.Where(dt => dt != null);
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