Click here to Skip to main content
12,889,934 members (49,541 online)
Click here to Skip to main content
Add your own
alternative version


31 bookmarked
Posted 13 May 2011

Convert Datatable to Collection using Generic

, 12 Jun 2011 CPOL
Rate this:
Please Sign up or sign in to vote.
This is an example to Convert from a datatable to a specific type of collection using Generic
Prerequisite: using System.Reflection;

Sometime at the time of coding, we need to convert a DataTable to a generic list.

Suppose I have a DataTable which contains Employee information. Now if I want to convert this into the collection of the Employee class. For this type of requirement, there is no in-built function. We need to write our own coding. And after sometime, we got the same requirement to some other type of object, then again new coding for that specific type.

Instead, we can make our custom method which will work for all types of Class.

First, I am creating an Extension Method.

public static class MyExtensionClass
     public static List<T> ToCollection<T>(this DataTable dt)
        List<T> lst = new System.Collections.Generic.List<T>();
        Type tClass = typeof(T);
        PropertyInfo[] pClass = tClass.GetProperties();
        List<DataColumn> dc = dt.Columns.Cast<DataColumn>().ToList();
        T cn;
        foreach (DataRow item in dt.Rows)
            cn = (T)Activator.CreateInstance(tClass);
            foreach (PropertyInfo pc in pClass)
                // Can comment try catch block. 
                    DataColumn d = dc.Find(c => c.ColumnName == pc.Name);
                    if (d != null)
                        pc.SetValue(cn, item[pc.Name], null);
        return lst;

We can comment line 1 and line 2, still it will work because of the try block.

Here is an example.


public class ClassName
    public string ItemCode { get; set; }
    public string Cost { get; set; }
    public override string ToString()
        return "ItemCode : " + ItemCode + ", Cost : " + Cost;


public DataTable getTable()
    DataTable dt = new DataTable();
    dt.Columns.Add(new DataColumn("ItemCode", typeof(string)));
    dt.Columns.Add(new DataColumn("Cost", typeof(string)));
    DataRow dr;
    for (int i = 0; i < 10; i++)
        dr = dt.NewRow();
        dr[0] = "ItemCode" + (i + 1);
        dr[1] = "Cost" + (i + 1);
    return dt;

Now we can convert this DataTable to List<classname></classname> like that:

DataTable dt = getTable();
List<ClassName> lst = dt.ToCollection<ClassName>();
foreach (ClassName cn in lst)
    Response.Write(cn.ToString() + "<BR/>");


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Software Developer (Senior)
India India
No Biography provided

You may also be interested in...


Comments and Discussions

GeneralReason for my vote of 5 A great time saver Pin
RV Williams23-Aug-11 21:14
memberRV Williams23-Aug-11 21:14 
GeneralRe: thanks Williams Pin
nit_singh26-Aug-11 21:35
membernit_singh26-Aug-11 21:35 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

Permalink | Advertise | Privacy | Terms of Use | Mobile
Web02 | 2.8.170424.1 | Last Updated 12 Jun 2011
Article Copyright 2011 by nit_singh
Everything else Copyright © CodeProject, 1999-2017
Layout: fixed | fluid