'System.Data.DataRowView' does not contain a property with the name 'FullName'.

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C#

ASP.NET

C#4.0

Hi guys am populating a gridview according to selected date
I get this error:DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'FullName'.

this how i populate

#region Load grdAvailableStaff Slots When Date Is Selected
public void loadGrdAvailableStaffSlotsWhenDateIsSelected()
{
    DataTable dt = new DataTable();
    systemBusinessLayer = new BusinessLayer();
    dt = systemBusinessLayer.grid(DatePicker.Text);
    grdAvailableStaff.DataSource = dt;
    grdAvailableStaff.DataBind();
}
#endregion

Code in my business layer

public DataTable grid(string date)
{
    using (SqlConnection con = new SqlConnection(ConnString))
    {
        SqlCommand cmd = new SqlCommand("procAvailableStuff", con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.Add(new SqlParameter("@Date", SqlDbType.NVarChar));
        cmd.Parameters["@Date"].Value = date;
        DataTable dTable = new DataTable("Fullname");
        SqlDataAdapter adapter = new SqlDataAdapter(cmd);
        adapter.Fill(dTable);
        return dTable;
    }
}

Below is my storedprocedure

SELECT   DISTINCT  Slots.EmpRecNumber AS 'RecordNumber' ,Employee.EmpName+' '+Employee.EmpSurname AS 'EmployeeName', Slots.Timeslot, Slots.Date, Slots.SlotID,Employee.EmpEmail 
FROM         Employee INNER JOIN
                      Slots ON Employee.EmpRecNumber = Slots.EmpRecNumber
WHERE Slots.status='a' AND Slots.Date=@Date AND Slots.EmpRecNumber IN (SELECT     EmpRecNumber
FROM         Employee)