请高手帮忙解释一下这段代码的意思?

[lijizun]

private bool SaveBill()
{
if (this.txtBillNo.Text.Trim() == string.Empty
|| this.txtBillNo.Text.Trim().ToUpper() == this.BillPrefix)
{
this.ShowInfo("请按规则录入单号。");
this.txtBillNo.Focus();
return false;
}
if (this.cboStorage.SelectedIndex < 0)
{
this.ShowInfo("请选择仓库。");
this.cboStorage.Focus();
return false;
}
if (this.txtBizer.Tag == null)
{
this.ShowInfo("请输入" + this.BizerTitle + "。");
this.txtBizer_GotFocus(null, null);
this.cboStorage.Focus(); //光标定位
return false;
}
if (_grid.Count == 0)
{
this.ShowInfo("没有记录保存。");
return false;
}
BizerInfo bizer = (BizerInfo)this.txtBizer.Tag;
BizBillInfo info = new BizBillInfo();
info.BillNo = this.txtBillNo.Text.Trim();
info.BillDate = DateTime.Now;
info.StorageId = int.Parse(this.cboStorage.SelectedValue.ToString());
info.StorageName = this.cboStorage.Text.Trim();
info.BizerId = bizer.BizerId;
info.BizerName = bizer.BizerName;
info.InputMan = "mobile";
info.Remark = string.Empty;
info.Amount = _grid.Amount;
info.Money = _grid.Money;
this.ShowStatus("正在保存信息");
this.SaveBill(info, _grid.ProductList.ToArray());
this.HideStatus();
this.HasSaved = true;
return true;
}

[ericzhangbo1982111]

这个。。。。怎么解释呢。！
哎！

[热学沸腾56]

up,mark

[pennymay]

private bool SaveBill()
        {
            if (this.txtBillNo.Text.Trim() == string.Empty
                || this.txtBillNo.Text.Trim().ToUpper() == this.BillPrefix)   //文本框如果输入空或者大写后等于BillPrefix 条件成立
            {
                this.ShowInfo("请按规则录入单号。");    //显示"请按规则录入单号。"
                this.txtBillNo.Focus();              // 光标定位为txtBillno
                return false;                        //返回假
            }
            if (this.cboStorage.SelectedIndex < 0)    //cboStorage如果没有选择   条件成立
            {
                this.ShowInfo("请选择仓库。");
                this.cboStorage.Focus();
                return false;
            }
            if (this.txtBizer.Tag == null)  //txtBizer的tag为空  条件成立
            {
                this.ShowInfo("请输入" + this.BizerTitle + "。");   
                this.txtBizer_GotFocus(null, null);
                this.cboStorage.Focus(); //光标定位
                return false;
            }
            if (_grid.Count == 0)   //_grid的数量为0
            {
                this.ShowInfo("没有记录保存。");
                return false;
            }
            BizerInfo bizer = (BizerInfo)this.txtBizer.Tag; 
            BizBillInfo info = new BizBillInfo();    //重NEW 一个新的BizBillInfo Class, 叫info
            info.BillNo = this.txtBillNo.Text.Trim();  //info的BillNo 等于文本框txtBillNo的内容
            info.BillDate = DateTime.Now;             //info的日期等于当前
            info.StorageId = int.Parse(this.cboStorage.SelectedValue.ToString());  //info的StorageId等于cboStorage选择的值
            info.StorageName = this.cboStorage.Text.Trim();    //info的StorageName等于cboStorage的内容
            info.BizerId = bizer.BizerId;                     //类似以上
            info.BizerName = bizer.BizerName;
            info.InputMan = "mobile";
            info.Remark = string.Empty;
            info.Amount = _grid.Amount;
            info.Money = _grid.Money;
            this.ShowStatus("正在保存信息");
            this.SaveBill(info, _grid.ProductList.ToArray());
            this.HideStatus();
            this.HasSaved = true;
            return true;                //返回真
        }

[peterb]

好像是一个类似于仓库系统保存入库单方法,先对输入的内容进行验证,合法的话就保存到库中

[zgke]

检查 附值 保存

[Myth_NiuNiu]

晕了，不就一个保存吗？

[wartim]

private bool 保存单据()
{
if (单据编号没填
|| 单据编号只填了单据固定前缀（意思是只输入了前缀忘了加编号等信息？）)
{
this.ShowInfo("请按规则录入单号。");
单据编号控件获得焦点;
返回false继续重输;
}
if (仓库下拉框没选)
{
this.ShowInfo("请选择仓库。");
仓库下拉框控件获得焦点;
返回false继续重输;
}
if (this.txtBizer.Tag == null) Bizer是什么东东
{
this.ShowInfo("请输入" + this.BizerTitle + "。");
this.txtBizer_GotFocus(null, null); 好像是实现一个功能：输入一些信息给一个类实例，然后把类实例存在tag里
this.cboStorage.Focus(); //光标定位
return false; 重输
}
if (产品明细数据表格里一条记录也没有)
{
this.ShowInfo("没有记录保存。");
return false; 重输
}
BizerInfo bizer = (BizerInfo)this.txtBizer.Tag; Tag里事前存了一个类实例（真是多此一举）
BizBillInfo info = new BizBillInfo(); 单据类
info.BillNo = this.txtBillNo.Text.Trim(); 一下保存参数进这个类
info.BillDate = DateTime.Now;
info.StorageId = int.Parse(this.cboStorage.SelectedValue.ToString());
info.StorageName = this.cboStorage.Text.Trim();
info.BizerId = bizer.BizerId;
info.BizerName = bizer.BizerName;
info.InputMan = "mobile";
info.Remark = string.Empty;
info.Amount = _grid.Amount;
info.Money = _grid.Money;
this.ShowStatus("正在保存信息");
this.SaveBill(info, _grid.ProductList.ToArray()); // 类实例值都赋好了，调用savebill的重载方法实际存数据给数据库
this.HideStatus();
this.HasSaved = true;
return true;
}