how to assign value to class object Of TabContainer's Controls

Question

public void btnAddRecord_Click(object sender, EventArgs e)

    {

        if (TabContainer1.ActiveTabIndex == 0)

        {

           //string txtSlider = Convert.ToString(((TextBox)TabPanel1.FindControl("txtSlider")).Text);

            Accessories accessories = new Accessories();

            accessories.txtSlider = (TextBox)TabPanel1.FindControl("txtSlider");

            accessories.ddlCategory = (DropDownList)TabPanel1.FindControl("ddlCategory");

            accessories.ddlQuality = (DropDownList)TabPanel1.FindControl("ddlQuality");

            accessories.ddlItemType = (DropDownList)TabPanel1.FindControl("ddlItemType");

            accessories.ddlPurchaseUnit = (DropDownList)TabPanel1.FindControl("ddlPurchaseUnit");

            accessories.ddlPriceTerm = (DropDownList)TabPanel1.FindControl("ddlPriceTerm");

            accessories.ddlShortName = (DropDownList)TabPanel1.FindControl("ddlShortName");

            accessories.txtItemCode = (TextBox)TabPanel1.FindControl("txtItemCode");

            accessories.txtArticle = (TextBox)TabPanel1.FindControl("txtArticle");

            accessories.txtMake = (TextBox)TabPanel1.FindControl("txtMake");

            accessories.txtDescription = (TextBox)TabPanel1.FindControl("txtDescription");

            accessories.txtConsuptionUnit = (TextBox)TabPanel1.FindControl("txtConsuptionUnit");

            accessories.txtResult = (TextBox)TabPanel1.FindControl("txtResult");

            accessories.txtDesign = (TextBox)TabPanel1.FindControl("txtDesign");

            accessories.txtPrice = (TextBox)TabPanel1.FindControl("txtPrice");

            accessories.txtReorderableLevel = (TextBox)TabPanel1.FindControl("txtReorderableLevel");

            accessories.chkReorderable = (CheckBox)TabPanel1.FindControl("chkReorderable");

            accessories.chkApproved = (CheckBox)TabPanel1.FindControl("chkApproved");

            accessories.chkActive = (CheckBox)TabPanel1.FindControl("chkActive");

            accessories.lblImagePath = (Label)TabPanel1.FindControl("lblImagePath");

            int rows = businessServiceClient.SaveAccessories(accessories);

}

}

This code not working i want to know how to Assign the value of controls of TabContainer  to Class Object

Plz give me Solution if any