How to convert list to datatable using extension method

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Problem

error mismatch count parameter when convert list to datatable

my list as below
my list output of itemcode as below "1830","950","902","540"

How to convert list of string to datatable

What I have tried:

static List<string> SimilarItems = new List<string>();
Similar = ConvertToString(dt.Rows[i]["ItemCode"]);
                    SimilarItems.Add(Similar);
dtcollectlistdata = Extensions.ToDataTable(SimilarItems);

public static DataTable ToDataTable<T>(List<T> items)
    {

        DataTable dataTable = new DataTable(typeof(T).Name);

        //Get all the properties

        PropertyInfo[] Props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
       
        foreach (PropertyInfo prop in Props)
        {

            //Setting column names as Property names

            dataTable.Columns.Add(prop.Name);

        }

        foreach (T item in items)
        {

            var values = new object[Props.Length];

            for (int i = 0; i < Props.Length; i++)
            {

                //inserting property values to datatable rows

                values[i] = Props[i].GetValue(item, null);

            }

            dataTable.Rows.Add(values);

        }
        return dataTable;
    }

Posted 26-Sep-18 12:05pm

ahmed_sa

Updated 26-Sep-18 20:12pm

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OriginalGriff · Answer 1 · 2018-09-26T19:42:00

Solution 1

Have a look at this: Converting a List to a DataTable[^] - it's the method I use.

Posted 26-Sep-18 19:42pm

OriginalGriff

Comments

Maciej Los 27-Sep-18 2:12am

5ed!

Maciej Los · Answer 2 · 2018-09-26T20:13:00

Well, i'd strogly recommend to read this: How to: Implement CopyToDataTable<T> Where the Generic Type T Is Not a DataRow | Microsoft Docs[^]

If your list is just a List<string>, you can use: DataTable.LoadDataRow()[^] + CopyToDataTable()[^] method.

See:

C#

List<string> mylist = new List<string>() {"1830","950","902","540"};

DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("item", typeof(string)));
dt = mylist
	.Select(x=> dt.LoadDataRow(new object[]{x}, false))
	.CopyToDataTable();

For further details, please see: Creating a DataTable From a Query (LINQ to DataSet) | Microsoft Docs[^]

Good luck!