DataSet does not support System.Nullable<> exception in c#

Question

public partial class Form2 : Form
{
        public Form2()
        {
            InitializeComponent();
        }
        private void Form2_Load(object sender, EventArg         


        

Answer 1

Try this :

public partial class Form2 : Form
{
        public Form2()
        {
            InitializeComponent();
        }
        private void Form2_Load(object sender, EventArgs e)
        {
            RST_DBDataContext db = new RST_DBDataContext();
    var d = (from s in db.TblSpareParts
             select new { s.SPartName, s.SPartCode, s.ModelID, s.SPartLocation, s.SPartActive, newPartSalePrice = s.SPartSalePrice == null ? 0 : s.SPartSalePrice }).ToArray();
    CrystalReport1 c = new CrystalReport1();
    c.SetDataSource(d);
    crystalReportViewer1.ReportSource = c;

        } 
}

you should check for null in the selection with

s.SPartSalePrice == null ? 0 : s.SPartSalePrice 

whetherit is null or not if it is null then it will return 0 otherwise it returns the value and assign it to the new variable

newPartSalePrice = s.SPartSalePrice == null ? 0 : s.SPartSalePrice