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copied!<p>hi i insert data into three table using this code </p> <pre><code> Product_Table AddProducttbl = new Product_Table(); Product_Company Companytbl = new Product_Company(); Product_Category Categorytbl = new Product_Category(); // genrate product id's long Productid = (from p in Accountdc.Product_Tables select p.Product_ID ).FirstOrDefault(); if (Productid == 0) Productid++; else Productid = (from lng in Accountdc.Product_Tables select lng.Product_ID ).Max() + 1; try { AddProducttbl.Product_ID = Productid; AddProducttbl.Product_Name = Request.Form["ProductName"]; AddProducttbl.Reorder_Label = Request.Form["ReorderLevel"]; AddProducttbl.Unit = Convert.ToDecimal(Request.Form["Unit"]); AddProducttbl.Selling_Price = Convert.ToDecimal(Request.Form["Selling_Price"]); AddProducttbl.MRP = Convert.ToDecimal(Request.Form["MRP"]); // Accountdc.Product_Tables.InsertOnSubmit(AddProducttbl ); // genrate category id's long Companyid = (from c in Accountdc.Product_Companies select c.Product_Company_ID).FirstOrDefault(); if (Companyid == 0) Companyid++; else Companyid = (from Ct in Accountdc.Product_Companies select Ct.Product_Company_ID).Max() + 1; Companytbl.Product_Company_ID = Companyid; Companytbl.Product_Company_Name = Request.Form["Company"]; AddProducttbl.Product_Company = Companytbl; //Genrate Category id's long Categoryid = (from ct in Accountdc.Product_Categories select ct.Product_Category_ID).FirstOrDefault(); if (Categoryid == 0) Categoryid++; else Categoryid = (from Ct in Accountdc.Product_Categories select Ct.Product_Category_ID).Max() + 1; Categorytbl.Product_Category_ID = Categoryid; Categorytbl.Product_Category_Name = Request.Form["Category"]; AddProducttbl.Product_Category = Categorytbl; Accountdc.Product_Tables.InsertOnSubmit(AddProducttbl); Accountdc.SubmitChanges(); } catch { ViewData["submit Error"] = "No Product Submit"; } </code></pre>

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