c# - how to exclude some list properties to make data table -

in below utility function (list data table), how can exclude member of list.

like, don't want send 2 properties "uniquekey" & "pointtopointdata" utility method below,

public class pointdataclone {     public int dataid { get; set; }     public string uniquekey { get; set; }     public int count { get; set; }     public list<pointtopointdata> pointtopointdata { get; set; } } 

utility function,

public static datatable todatatable<t>(this list<t> ilist)     {         datatable datatable = new datatable();         propertydescriptorcollection propertydescriptorcollection = typedescriptor.getproperties(typeof(t));         (int = 0; < propertydescriptorcollection.count; i++)         {             propertydescriptor propertydescriptor = propertydescriptorcollection[i];             type type = propertydescriptor.propertytype;              if (type.isgenerictype && type.getgenerictypedefinition() == typeof(nullable<>))                 type = nullable.getunderlyingtype(type);              datatable.columns.add(propertydescriptor.name, type);         }         object[] values = new object[propertydescriptorcollection.count];         foreach (t ilistitem in ilist)         {             (int = 0; < values.length; i++)             {                 values[i] = propertydescriptorcollection[i].getvalue(ilistitem);             }             datatable.rows.add(values);         }         return datatable;     } 

create attribute

[attributeusage(attributetargets.method | attributetargets.property | attributetargets.field | attributetargets.parameter, allowmultiple = false)] public class dontshowme : attribute { } 

you can use attribute annotate class

public class pointdataclone {     public int dataid { get; set; }     [dontshowme]     public string uniquekey { get; set; }     public int count { get; set; }     [dontshowme]     public list<pointtopointdata> pointtopointdata { get; set; } } 

and modify function query attributes. need additional using statement

using system.componentmodel; 

add line loop

if (type.isgenerictype && type.getgenerictypedefinition() == typeof(nullable<>)) type = nullable.getunderlyingtype(type);  // test attribute see if shown if (propertydescriptor.attributes.contains(new dontshowme())) continue;  datatable.columns.add(propertydescriptor.name, type); 

you have deal fact object have more properties datatable has columns. leave manage little detail.

hope helps,

marc