private void txtReadingCard_KeyDown(object sender, KeyEventArgs e)
{
if (this.txtReadingCard.Text.Length != 0 && e.KeyValue == 13)
{
objReader = readerService.GetReaderByReadingCard(this.txtReadingCard.Text.Trim());
if (objReader != null)
{
if (objReader.StatusId == 1)
{
//显示读者信息
this.lblReaderName.Text = objReader.ReaderName;
this.lblRoleName.Text = objReader.RoleName;
this.lblAllowCounts.Text = objReader.AllowCounts.ToString();
this.pbReaderImage.Image = objReader.ReaderImage != "" ? (Image) new Common.SerializeObjectToString().DeserializeObject(this.objReader.ReaderImage) : null;
//开启图书条码扫描文本框已经还书按钮
this.txtBarCode.Enabled = true;
this.btnConfirmReturn.Enabled = true;
//显示读者未归还的图书
nonReturnList = borrowService.GetBorrowDetailByReadingCard(this.txtReadingCard.Text.Trim());
this.dgvNonReturnList.DataSource = null;
this.dgvNonReturnList.DataSource = nonReturnList;
//显示已借阅图书总数和剩余可借图书总数
/* int borrowCount = borrowService.GetBorrowCount(this.txtReadingCard.Text.Trim());
* this.lblBorrowCount.Text = borrowCount.ToString();
* this.lbl_Remainder.Text = (objReader.AllowCounts - borrowCount).ToString();*/
//基于linq实现
int borrowCount = (from n in nonReturnList select n).Sum(u => u.NonReturnCount);
int remainder = objReader.AllowCounts - borrowCount;
this.lblBorrowCount.Text = borrowCount.ToString();
this.lbl_Remainder.Text = remainder.ToString();
}
else
{
MessageBox.Show("当前借阅证已经被挂失，目前不能拿继续使用！", "还书提示");
}
}
else
{
MessageBox.Show("当前借阅证号不存在！！！", "查询提示");
this.txtReadingCard.SelectAll();
}
}
}