Can we convert the list into DataTable in C#?

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C#

C#4.0

Hi everyone ,
Can any one tell me how to convert the List<T> into DataTable in C# ?

Posted 26-Sep-10 23:42pm

hemantwithu

Updated 27-Sep-10 5:57am

Toli Cuturicu

v3

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3 solutions

Solution 2

for Hiren's code we need to use...

using System.Collections.Generic;
using System.ComponentModel;

Thanks Hiren

Posted 26-Sep-10 23:58pm

arindamrudra

Updated 27-Sep-10 5:55am

v3

Comments

Hiren solanki 27-Sep-10 6:18am

Yeah, Thanks arindamrudra.

hemantwithu 27-Sep-10 7:04am

Thanks alot

Solution 3

Hi,
Consider you have a list like

C#

    List<string> countries = new List<string>();
    countries.Add("India");
    countries.Add("Pakistan");
    countries.Add("USA");

    DataTable workTable = new DataTable("Countries");
    DataColumn column;   DataRow row;
    column = new DataColumn();
    column.DataType = System.Type.GetType("System.String");
    column.ColumnName = "CountryName";
    column.AutoIncrement = false;
    column.Caption = "ParentItem";
    column.ReadOnly = false;
    column.Unique = false;
    // Add the column to the table.
    workTable.Columns.Add(column);

for(int i=0; i<=countries.length; i++)
{  
    workTable = table.NewRow();
    workTable["CountryName"] = (String) countries[i];
    workTable.Rows.Add(row);
}

Posted 27-Sep-10 0:07am

rahula84

Updated 24-Feb-13 23:03pm

v3

Comments

premjit mohanty 6-Jan-12 1:57am

or(int i=0; i<=countries.length; i++) error that .. lengthhave not found..

Roshin Simon 12-Oct-13 1:28am

for (int i = 0; i <= list.Count; i++)
{
row = workTable.NewRow();
row["CountryName"] = (String)list[i];
workTable.Rows.Add(row);
}

Member 10353878 20-Dec-13 2:58am

how to use this datatable to bind repeater

Member 10353878 20-Dec-13 2:58am

how to use this datatable to bind repeater

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Hiren solanki · Accepted Answer · 2010-09-26T23:52:00

The Sample code will show you about conversion to Generic List to Datatable.
You will have to use Reflaction for that.

C#

public static DataTable ToDataTable<T>(this IList<T> data)
{
    PropertyDescriptorCollection props =
        TypeDescriptor.GetProperties(typeof(T));
    DataTable table = new DataTable();
    for(int i = 0 ; i < props.Count ; i++)
    {
        PropertyDescriptor prop = props[i];
        table.Columns.Add(prop.Name, prop.PropertyType);
    }
    object[] values = new object[props.Count];
    foreach (T item in data)
    {
        for (int i = 0; i < values.Length; i++)
        {
            values[i] = props[i].GetValue(item);
        }
        table.Rows.Add(values);
    }
    return table;        
}

Please vote and Accept Answer if it Helped.