Complex DataBinding accepts as a data source either an IList or an IListSource.

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C#

I want to bind the value of groups into DataTable dt1=new DataTable(). After that I want to bind the DataTable datat to DataGrid. But I am unable to do it. When i given the datasource to datagrid as groups directly then I got Exception of "Complex DataBinding accepts as a data source either an IList or an IListSource."

C#

private void BindGrid()
        {
            var dt = new DataTable();
            dt.Columns.Add("Date",typeof(string));
            dt.Columns.Add("Name",typeof(string));
            dt.Columns.Add("City",typeof(string));
            dt.Columns.Add("Mobile",typeof(string));
            dt.Rows.Add("1/11/2014", "David", "Noida", "Bsnl");
            dt.Rows.Add("1/11/2014", "James", "Mumbai", "Airtel");
            dt.Rows.Add("30/1/2015", "Ramesh", "Pune", "Vodafone");
            dt.Rows.Add("30/1/2015", "Kamal", "Kolkata", "Idea");
            dt.Rows.Add("15/5/2015", "Mahesh", "Chennai", "Reliance");
            var groups = (
            from DataRow row in dt.AsEnumerable()
            select new
            {
                date = row.Field<string>("Date")
            }
            ).Distinct();

            DataTable dt1 = new DataTable();
            
            dataGrid1.DataSource = groups;

        }</string>

Posted 29-May-15 22:28pm

Member 8263991

Updated 29-May-15 23:09pm

RajeeshMenoth

v2

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Maciej Los · Answer 1 · 2015-06-10T09:12:00

"Complex DataBinding accepts as a data source either an IList or an IListSource" error message means that you have to bind list of object (complex data type) rather than IEnumerable<String>.

Try to change code as follow:

C#

DataTable dt = new DataTable();
dt.Columns.Add("Date",typeof(DateTime));
dt.Columns.Add("Name",typeof(string));
dt.Columns.Add("City",typeof(string));
dt.Columns.Add("Mobile",typeof(string));

dt.Rows.Add(new object[]{new DateTime(2014,11,1), "David", "Noida", "Bsnl"});
dt.Rows.Add(new object[]{new DateTime(2014,11,1), "James", "Mumbai", "Airtel"});
dt.Rows.Add(new object[]{new DateTime(2015,1,30), "Ramesh", "Pune", "Vodafone"});
dt.Rows.Add(new object[]{new DateTime(2015,1,30), "Kamal", "Kolkata", "Idea"});
dt.Rows.Add(new object[]{new DateTime(2015,5,15), "Mahesh", "Chennai", "Reliance"});

var days = dt.AsEnumerable().Select(a=>a.Field<datetime>("Date")).Distinct().ToList();

dataGrid1.DataSource = days;</datetime>

days object is type of List<DateTime>. It should resolve your issue ;)