/// <summary>
 /// 执行删除数据并处理相关数据一致性
 /// </summary>
 /// <param name="e">传入的带有数据的事件参数</param>
 /// <returns></returns>
 private bool DeleteData(ListViewDeleteEventArgs e)
 {
     //实例化数据适配器
     using (var da = new v_material_loseTableAdapter())
     //取得数据库连接
     using (var conn = da.Connection)
     {
         //打开数据库连接
         conn.Open();
         //事务
         using (var tran = conn.BeginTransaction())
         {
             //设置事务
             da.Transaction = tran;
             try
             {
                 //当前盘亏单号
                 string billNum = e.Keys[0].ToString();
                 //当前行号
                 byte rowId = Convert.ToByte(e.Keys[1]);
                 //取得该条盘亏单清单记录
                 var tab = da.GetDataByBillNumAndRowId(billNum, rowId);
                 //检测是否存在数据
                 if (tab.Rows.Count <= 0)
                 {
                     throw new Exception(string.Format("当前单据:\n单号:{0}\n行号:{1}\n已经被其他用户删除!", billNum, rowId));
                 }
                 //单据内容、原料结存适配器
                 using (var daContent = new t_material_lose_contentTableAdapter())
                 using (var daBalance = new t_material_balanceTableAdapter())
                 {
                     //设置连接对象
                     daContent.Connection = daBalance.Connection = tran.Connection;
                     //设置事务
                     daContent.Transaction = daBalance.Transaction = tran;
                     //遍历行执行添加到结存记录
                     foreach (DataSetMaterialLose.v_material_loseRow row in tab.Rows)
                     {
                         //执行添加结存
                         if (!ydOperateMaterial.AddMaterialBalance(
                             tran,
                             BillType.Lose,
                             row.bill_num,
                             row.row_id
                         ))
                         {
                             return false;
                         }
                     }
                     //根据盘亏单号和行号删除盘亏记录
                     if (daContent.Delete(billNum, rowId) <= 0)
                     {
                         throw new Exception("删除单据内容记录失败!");
                     }
                     //检测当前盘亏记录内容行数
                     int? iCount = (int?)daContent.CountByBillNum(billNum);
                     if (iCount.HasValue && iCount.Value <= 0)
                     {
                         //表头适配器
                         using (var daHead = new t_material_lose_headTableAdapter())
                         {
                             //删除表头
                             if (daHead.Delete(billNum) <= 0)
                             {
                                 throw new Exception("删除单据表头记录失败!");
                             }
                         }
                     }
                 }
                 //提交事务
                 tran.Commit();
                 //返回成功
                 return true;
             }
             catch (Exception ex)
             {
                 //回滚事务
                 tran.Rollback();
                 //抛出错误
                 throw new Exception("删除盘亏单记录出现错误:\n" + ex.Message);
             }
         }
     }
 }
 /// <summary>
 /// 执行删除数据并处理相关数据一致性
 /// </summary>
 /// <param name="e">传入的带有数据的事件参数</param>
 /// <returns></returns>
 private bool DeleteData(FormViewDeleteEventArgs e)
 {
     //当前单号
     string billNum = Convert.ToString(e.Keys[0]);
     //数据适配器
     //当前数据库连接
     //当前更新语句对象
     using (var da = new v_material_loseTableAdapter())
     using (var conn = da.Connection)
     {
         //打开数据库连接
         conn.Open();
         //开启事务
         using (var tran = conn.BeginTransaction())
         {
             //试运行
             try
             {
                 //设置事务
                 da.Transaction = tran;
                 //获取数据
                 var tab = da.GetDataByBillNum(billNum);
                 //检查是否获取到行
                 if (tab.Rows.Count == 0)
                 {
                     //显示失败
                     throw new Exception("当前记录已经被其他用户删除!");
                 }
                 //数据适配器
                 using (var daHead = new t_material_lose_headTableAdapter())
                 using (var daContent = new t_material_lose_contentTableAdapter())
                 using (var daBalance = new t_material_balanceTableAdapter())
                 {
                     //设置数据库连接
                     daHead.Connection = daContent.Connection = daBalance.Connection = conn;
                     //设置事务
                     daHead.Transaction = daContent.Transaction = daBalance.Transaction = tran;
                     //遍历行执行添加到结存记录
                     foreach (DataSetMaterialLose.v_material_loseRow row in tab.Rows)
                     {
                         //执行添加结存
                         if (!ydOperateMaterial.AddMaterialBalance(
                             tran,
                             BillType.Lose,
                             row.bill_num,
                             row.row_id
                         ))
                         {
                             return false;
                         };
                     }
                     //从单据内容中删除
                     if (daContent.DeleteByBillNum(billNum) <= 0)
                     {
                         throw new Exception("删除单据内容记录失败!");
                     }
                     //从单据表头中删除
                     if (daHead.Delete(billNum) <= 0)
                     {
                         throw new Exception("删除单据表头记录失败!");
                     }
                 }
                 //提交事务
                 tran.Commit();
                 //返回成功
                 return true;
             }
             catch (Exception ex)
             {
                 //回滚事务
                 tran.Rollback();
                 //非数字返回失败
                 throw new Exception(ex.Message);
             }
         }
     }
 }
 /// <summary>
 /// 根据单号从数据库中删除单据的表头和内容
 /// </summary>
 /// <param name="billNum">单据号</param>
 private bool DeleteBillByBillNum(string billNum)
 {
     //实例化数据适配器
     using (var da = new v_material_loseTableAdapter())
     //取得数据库连接
     using (var conn = da.Connection)
     {
         //打开数据库连接
         conn.Open();
         //事务
         using (var tran = conn.BeginTransaction())
         {
             //设置事务
             da.Transaction = tran;
             try
             {
                 //取得之前盘亏单清单记录
                 var tab = da.GetDataByBillNum(billNum);
                 //检测是否存在数据
                 if (tab.Rows.Count >= 0)
                 {
                     //单据表头行、内容行、原料结存和待盘亏数据适配器
                     using (var daHead = new t_material_lose_headTableAdapter())
                     using (var daContent = new t_material_lose_contentTableAdapter())
                     using (var daBalance = new t_material_balanceTableAdapter())
                     {
                         //设置连接对象
                         daHead.Connection = daContent.Connection = daBalance.Connection = tran.Connection;
                         //设置事务
                         daHead.Transaction = daContent.Transaction = daBalance.Transaction = tran;
                         //遍历行执行添加到结存记录
                         foreach (DataSetMaterialLose.v_material_loseRow row in tab.Rows)
                         {
                             //执行添加结存
                             if (!ydOperateMaterial.AddMaterialBalance(
                                 tran,
                                 BillType.Lose,
                                 row.bill_num,
                                 row.row_id
                             ))
                             {
                                 return false;
                             }
                         }
                         //根据盘亏单号删除全部盘亏内容记录
                         if (daContent.DeleteByBillNum(billNum) <= 0)
                         {
                             throw new Exception("根据单号删除全部盘亏内容记录失败!");
                         }
                         //根据盘亏单号删除全部盘亏表头记录
                         if (daHead.Delete(billNum) <= 0)
                         {
                             throw new Exception("根据单号删除全部盘亏表头记录失败!");
                         }
                     }
                 }
                 //提交事务
                 tran.Commit();
                 //返回成功
                 return true;
             }
             catch (Exception ex)
             {
                 //回滚事务
                 tran.Rollback();
                 //抛出错误
                 throw new Exception("删除盘亏单记录出现错误:\n" + ex.Message);
             }
         }
     }
 }
        /// <summary>
        /// 根据输入的参数值来执行更新数据
        /// </summary>
        /// <param name="e">传入的带有数据的事件参数</param>
        /// <returns></returns>
        private bool UpdateData(FormViewUpdateEventArgs e)
        {
            //数据适配器
            //当前添加语句对象
            //当前数据库连接
            using (var da = new v_material_loseTableAdapter())
            using (var conn = da.Connection)
            {
                //打开数据库连接
                conn.Open();
                //开启事务
                using (var tran = conn.BeginTransaction())
                {
                    //设置事务
                    da.Transaction = tran;
                    //试运行
                    try
                    {
                        //当前行单号
                        string billNum = Convert.ToString(e.Keys[0]);
                        //获取数据
                        using (var tab = da.GetDataByBillNum(billNum))
                        {
                            //检查是否获取到行
                            if (tab.Rows.Count == 0)
                            {
                                //显示失败
                                throw new Exception("当前记录已经被其他用户删除!");
                            }
                            //数据适配器
                            using (var daHead = new t_material_lose_headTableAdapter())
                            using (var daContent = new t_material_lose_contentTableAdapter())
                            using (var daBalance = new t_material_balanceTableAdapter())
                            {
                                //设置数据库连接
                                daHead.Connection = daContent.Connection = daBalance.Connection = conn;
                                //设置事务
                                daHead.Transaction = daContent.Transaction = daBalance.Transaction = tran;
                                //遍历行执行添加到结存记录
                                foreach (DataSetMaterialLose.v_material_loseRow row in tab.Rows)
                                {
                                    //执行添加结存
                                    if (!ydOperateMaterial.AddMaterialBalance(
                                         tran,
                                         BillType.Lose,
                                         row.bill_num,
                                         row.row_id
                                     ))
                                    {
                                        return false;
                                    }
                                }
                                //从单据内容中删除
                                if (daContent.DeleteByBillNum(billNum) <= 0)
                                {
                                    throw new Exception("保存到单据内容清单失败!");
                                }
                                //从单据表头中删除
                                if (daHead.Delete(billNum) <= 0)
                                {
                                    throw new Exception("保存到单据表头清单失败!");
                                }

                                //日期
                                DateTime billDate = Convert.ToDateTime(e.NewValues["bill_date"]);
                                //单据备注
                                string billRemark = Convert.ToString(e.NewValues["remark"]);
                                //录入员
                                string addPerson = e.NewValues["add_person"].ToString();
                                //录入时间
                                DateTime addTime = Convert.ToDateTime(e.NewValues["add_time"]);
                                //最后修改时间
                                DateTime lastChangeTime = Convert.ToDateTime(e.NewValues["last_change_time"]);
                                //含有数据的行数
                                int iCountContent = 0;
                                //遍历子表执行保存
                                for (int iRow = 0; iRow < 10; iRow++)
                                {
                                    //子表各控件
                                    var tr = tabDataListSon.Rows[iRow + 1];
                                    var litRowId = (Literal)tr.Cells[0].Controls[0];
                                    var txtSupplierCode = (TextBox)tr.Cells[1].Controls[0];
                                    var txtSupplierName = (TextBox)tr.Cells[2].Controls[0];
                                    var txtMaterialCode = (TextBox)tr.Cells[3].Controls[0];
                                    var txtMaterialName = (TextBox)tr.Cells[4].Controls[0];
                                    var txtMaterialSize = (TextBox)tr.Cells[5].Controls[0];
                                    var txtQty = (TextBox)tr.Cells[6].Controls[0];
                                    var txtMaterialUnit = (TextBox)tr.Cells[7].Controls[0];
                                    var hfPrice = (HiddenField)tr.Cells[8].Controls[0];
                                    var txtRemark = (TextBox)tr.Cells[9].Controls[0];
                                    //取得数据
                                    byte rowId = Convert.ToByte(litRowId.Text);
                                    string supplierCode = txtSupplierCode.Text;
                                    string supplierName = txtSupplierName.Text;
                                    string materialCode = txtMaterialCode.Text;
                                    string materialName = txtMaterialName.Text;
                                    string materialSize = txtMaterialSize.Text;
                                    decimal qty = txtQty.Text.Trim().Length <= 0 ? 0m : decimal.Parse(txtQty.Text.Trim());
                                    string materialUnit = txtMaterialUnit.Text;
                                    decimal price = hfPrice.Value.Trim().Length <= 0 ? 0m : decimal.Parse(hfPrice.Value.Trim());
                                    string remark = txtRemark.Text;
                                    //存在数据才保存
                                    if (supplierCode.Length > 0 && supplierName.Length > 0 && materialCode.Length > 0
                                        && materialName.Length > 0 && materialUnit.Length > 0 && qty > 0
                                    )
                                    {
                                        //从原料结存清单扣数
                                        if (!ydOperateMaterial.DecreaseMaterialBalance(
                                            daBalance,
                                            BillType.Lose,
                                            supplierName,
                                            materialName,
                                            price,
                                            qty
                                        ))
                                        {
                                            throw new Exception("从原料结存清单扣数失败!");
                                        }
                                        //保存到单据内容清单
                                        if (daContent.Insert(
                                            billNum,
                                            rowId,
                                            supplierCode,
                                            supplierName,
                                            materialCode,
                                            materialName,
                                            materialSize,
                                            qty,
                                            materialUnit,
                                            price,
                                            remark
                                        ) <= 0)
                                        {
                                            throw new Exception("保存到单据内容清单失败!");
                                        }
                                        //含有数据的行数计数
                                        iCountContent++;
                                    }
                                }

                                //保存表头
                                if (iCountContent > 0)
                                {
                                    if (daHead.Insert(
                                         billDate,
                                         billNum,
                                         billRemark,
                                         addPerson,
                                         addTime,
                                         lastChangeTime
                                    ) <= 0)
                                    {
                                        throw new Exception("保存到单据表头清单失败!");
                                    }
                                }
                            }
                        }
                        //提交事务
                        tran.Commit();
                        //返回成功
                        return true;
                    }
                    catch (Exception ex)
                    {
                        //回滚事务
                        tran.Rollback();
                        //非数字返回失败
                        throw new Exception(ex.Message);
                    }
                }
            }
        }