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Posted 12 Aug 2011

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Convert Datatable to Collection using Generic

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5.00/5 (3 votes)
13 Aug 2011CPOL
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:

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

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



DataTable

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

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)

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About the Author

Vano Maisuradze
Architect
Georgia Georgia
No Biography provided

Comments and Discussions

 
GeneralReason for my vote of 5 I really liked it!! Pin
Anurag Gandhi23-Aug-11 3:07
professionalAnurag Gandhi23-Aug-11 3:07 

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