Click here to Skip to main content
15,880,469 members
Articles / Web Development / ASP.NET
Alternative
Tip/Trick

Convert Datatable to Collection using Generic

Rate me:
Please Sign up or sign in to vote.
5.00/5 (3 votes)
13 Aug 2011CPOL 21K   2   1
Very nice!I've modified ToCollection(this DataTable dt) extension function, so if DataTable column names and class property names are different, then you can use this alternative:public static List ToCollection(this DataTable table, Dictionary dic){ List lst = new...
Very nice!

I've modified ToCollection<t>(this DataTable dt)</t> extension function, so if DataTable column names and class property names are different, then you can use this alternative:

C#
public static List<t> ToCollection<t>(this DataTable table, Dictionary<string,> dic)
{
    List<t> lst = new System.Collections.Generic.List<t>();
    Type classType = typeof(T);
    PropertyInfo[] propertyInfoList = classType.GetProperties();
    List<datacolumn> columnsList = table.Columns.Cast<datacolumn>().ToList();
    T t;
    foreach (DataRow item in table.Rows)
    {
        t = (T)Activator.CreateInstance(classType);
        foreach (PropertyInfo oneInfo in propertyInfoList)
        {
            try
            {
                DataColumn d = columnsList.Find(col => col.ColumnName == dic[oneInfo.Name]);
                if (d != null) oneInfo.SetValue(t, item[dic[oneInfo.Name]], null);
            }
            catch
            {
            }
        }
        lst.Add(t);
    }
    return lst;
}</datacolumn></datacolumn></t></t></t></t>


Class

C#
public class Person
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
}



DataTable

C#
public DataTable getTable()
{
    DataTable dt = new DataTable();
    dt.Columns.Add(new DataColumn("FIRST_NAME", typeof(string)));
    dt.Columns.Add(new DataColumn("LAST_NAME", typeof(string))); 
    DataRow dr;

    for (int i = 1; i < 11; i++)
    {
        dr = dt.NewRow();
        dr["FIRST_NAME"] = "First Name" + i;
        dr["LAST_NAME"] = "Last Name" + i;
        dt.Rows.Add(dr);
    }             
    return dt;
}


Convertion

C#
DataTable table = getTable();
Dictionary<string,> dic = new Dictionary<string,>();
dic.Add("FirstName", "FIRST_NAME");
dic.Add("LastName", "LAST_NAME"); 
List<person> lst = table.ToCollection<person>(dic);</person></person>

License

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


Written By
Architect
Georgia Georgia
This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.

Comments and Discussions

 
GeneralReason for my vote of 5 I really liked it!! Pin
Anurag Gandhi23-Aug-11 2:07
professionalAnurag Gandhi23-Aug-11 2:07 

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.