DataSet does not support System.Nullable<> in Export

Question

I was trying to generate a Report using Export to Excell, PDF, TextFile. Well I am doing this in MVC. I have a class which I named SPBatch (which is the exact name of my Stored

Answer 1

1) Define This Extensions as Below

public static class ListExtensions
    {
        public static DataTable ToDataTable(this List list)
        {
            DataTable table = new DataTable(typeof(T).Name);

            //Get Properites of List Fiels
            PropertyInfo[] props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);

            //Create Columns as Fields of List
            foreach (PropertyInfo propertyInfo in props)
            {
                var column = new DataColumn
                {
                    ColumnName = propertyInfo.Name,
                    DataType = propertyInfo.PropertyType.Name.Contains("Nullable") ? typeof(string) : propertyInfo.PropertyType
                };

                table.Columns.Add(column);
            }

            //Fill DataTable with Rows of List
            foreach (var item in list)
            {
                var values = new object[props.Length];

                for (var i = 0; i < props.Length; i++)
                {
                    values[i] = props[i].GetValue(item, null);
                }

                table.Rows.Add(values);
            }


            return table;
        }
    }

2) Call Extensions Method as Below where [_lstOperationDetails] is List that we want to convert it from List to DataTable

DataTable operationDetails = _lstOperationDetails.ToDataTable();