Insert Repeater rows to Database using Entity Framework in ASP.Net

hello 

i'm trying to insert multiple repeater rows into database but i failed todo that. 

this what i'm trying to do:

foreach (RepeaterItem item in Repeater1.Items)
        {
            if (item.ItemType == ListItemType.Item || item.ItemType == ListItemType.AlternatingItem)
            {
                Label lblItemNo = (Label)item.FindControl("lblItemNo");
                Label lblCampCode = (Label)item.FindControl("lblCampCode");
                Label lblUom = (Label)item.FindControl("lblUom");
                Label lblBalUnits = (Label)item.FindControl("lblBalUnits");
                Label lblWT = (Label)item.FindControl("lblWt");
                //TextBox txtExitUnits = (TextBox)item.FindControl("txtExitUnits");
                Label lblExitUnits = (Label)item.FindControl("lblExitUnits");
                
                
                Label lblcode = (Label)item.FindControl("lblCode");
                HiddenField hfcode = (HiddenField)item.FindControl("hfCustomerId");
                TempExit temp = new TempExit();

                temp.tmex_itemno = lblItemNo.Text;
                temp.tmex_gooddesc = lblCampCode.Text;
                temp.tmex_UOM = lblUom.Text;
                temp.tmex_wtbalance = decimal.Parse(lblWT.Text);
                temp.tmex_unitsbalance = decimal.Parse(lblBalUnits.Text);
                temp.tmex_ExitUnits = decimal.Parse(lblExitUnits.Text);
                db.TempExits.Add(temp);
                db.SaveChanges();
                //Response.Redirect("sendingaspx.aspx");
            }
        }

but i got the following error:

Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.

can any one help me?