protected void BtnForeignKey_Click(object sender, EventArgs e)
    {
        if (DropDownList1.SelectedIndex >= 0)
        {
            int index = DropDownList1.SelectedIndex;
            localhost.Field selectedField = FieldList[index];
            localhost.Service serviceObj = new localhost.Service();
            int orgID = (int)Session["orgID"];
            int objID = (int)Session["objID"];
            localhost.Table[] tablelst = serviceObj.getTablesWithPrimaryKey(orgID, objID, selectedField.FieldDataType);
            lstOfTables = new List<localhost.Table>(tablelst);
            DropDownList2.DataSource = lstOfTables;
            DropDownList2.DataTextField = "TNameProperty";
            DropDownList2.DataValueField = "ObjIDProperty";
            DropDownList2.DataBind();
            ViewState["foreignkey"] = lstOfTables;

        }
        //serviceObj.getTablesWithPrimaryKey((int)Session["orgID"],
    }