bookreturn.h

Visual C++.net数据库开发经典案例

			this->btnSearch->Click += new System::EventHandler(this, btnSearch_Click);
			// 
			// imageList1
			// 
			this->imageList1->ImageSize = System::Drawing::Size(16, 16);
			this->imageList1->ImageStream = (__try_cast<System::Windows::Forms::ImageListStreamer *  >(resources->GetObject(S"imageList1.ImageStream")));
			this->imageList1->TransparentColor = System::Drawing::Color::Transparent;
			// 
			// tBoxReaderID
			// 
			this->tBoxReaderID->Location = System::Drawing::Point(208, 40);
			this->tBoxReaderID->Name = S"tBoxReaderID";
			this->tBoxReaderID->Size = System::Drawing::Size(120, 21);
			this->tBoxReaderID->TabIndex = 6;
			this->tBoxReaderID->Text = S"";
			// 
			// label4
			// 
			this->label4->Location = System::Drawing::Point(344, 45);
			this->label4->Name = S"label4";
			this->label4->Size = System::Drawing::Size(56, 11);
			this->label4->TabIndex = 5;
			this->label4->Text = S"图书编号";
			// 
			// dgrdBooks
			// 
			this->dgrdBooks->DataMember = S"";
			this->dgrdBooks->Dock = System::Windows::Forms::DockStyle::Fill;
			this->dgrdBooks->HeaderForeColor = System::Drawing::SystemColors::ControlText;
			this->dgrdBooks->Location = System::Drawing::Point(0, 79);
			this->dgrdBooks->Name = S"dgrdBooks";
			this->dgrdBooks->Size = System::Drawing::Size(760, 350);
			this->dgrdBooks->TabIndex = 2;
			// 
			// BookReturnAdapter
			// 
			this->BookReturnAdapter->SelectCommand = this->sqlSelectCommand1;
			System::Data::Common::DataTableMapping* __mcTemp__1[] = new System::Data::Common::DataTableMapping*[1];
			System::Data::Common::DataColumnMapping* __mcTemp__2[] = new System::Data::Common::DataColumnMapping*[10];
			__mcTemp__2[0] = new System::Data::Common::DataColumnMapping(S"借阅编号", S"借阅编号");
			__mcTemp__2[1] = new System::Data::Common::DataColumnMapping(S"姓名", S"姓名");
			__mcTemp__2[2] = new System::Data::Common::DataColumnMapping(S"读者编号", S"读者编号");
			__mcTemp__2[3] = new System::Data::Common::DataColumnMapping(S"书名", S"书名");
			__mcTemp__2[4] = new System::Data::Common::DataColumnMapping(S"图书编号", S"图书编号");
			__mcTemp__2[5] = new System::Data::Common::DataColumnMapping(S"借阅时间", S"借阅时间");
			__mcTemp__2[6] = new System::Data::Common::DataColumnMapping(S"应还时间", S"应还时间");
			__mcTemp__2[7] = new System::Data::Common::DataColumnMapping(S"续借次数", S"续借次数");
			__mcTemp__2[8] = new System::Data::Common::DataColumnMapping(S"操作员", S"操作员");
			__mcTemp__2[9] = new System::Data::Common::DataColumnMapping(S"状态", S"状态");
			__mcTemp__1[0] = new System::Data::Common::DataTableMapping(S"Table", S"图书借阅", __mcTemp__2);
			this->BookReturnAdapter->TableMappings->AddRange(__mcTemp__1);
			// 
			// sqlSelectCommand1
			// 
			this->sqlSelectCommand1->CommandText = S"SELECT 图书借阅.借阅编号, 读者信息.姓名, 图书借阅.读者编号, 图书信息.书名, 图书借阅.图书编号, 图书借阅.借阅时间, 图书借阅.应还时间, 图" 
				S"书借阅.续借次数, 图书借阅.操作员, 图书借阅.状态 FROM 图书借阅 INNER JOIN 图书信息 ON 图书借阅.图书编号 = 图书信息.编号 INN" 
				S"ER JOIN 读者信息 ON 图书借阅.读者编号 = 读者信息.编号 WHERE (图书借阅.读者编号 LIKE @读者编号) AND (图书借阅.图书编号 " 
				S"LIKE @图书编号) AND (读者信息.姓名 LIKE @读者姓名) AND (图书借阅.状态 = \'未还\')";
			this->sqlSelectCommand1->Connection = this->sqlConnection1;
			this->sqlSelectCommand1->Parameters->Add(new System::Data::SqlClient::SqlParameter(S"@读者编号", System::Data::SqlDbType::VarChar, 40, S"读者编号"));
			this->sqlSelectCommand1->Parameters->Add(new System::Data::SqlClient::SqlParameter(S"@图书编号", System::Data::SqlDbType::VarChar, 50, S"图书编号"));
			this->sqlSelectCommand1->Parameters->Add(new System::Data::SqlClient::SqlParameter(S"@读者姓名", System::Data::SqlDbType::VarChar, 20, S"姓名"));
			// 
			// sqlConnection1
			// 
			this->sqlConnection1->ConnectionString = S"workstation id=localhost;packet size=4096;integrated security=SSPI;initial catalo" 
				S"g=libbook;persist security info=False";
			// 
			// groupBox2
			// 
			this->groupBox2->Controls->Add(this->btnReturn);
			this->groupBox2->Dock = System::Windows::Forms::DockStyle::Bottom;
			this->groupBox2->Location = System::Drawing::Point(0, 365);
			this->groupBox2->Name = S"groupBox2";
			this->groupBox2->Size = System::Drawing::Size(760, 64);
			this->groupBox2->TabIndex = 3;
			this->groupBox2->TabStop = false;
			// 
			// btnReturn
			// 
			this->btnReturn->Location = System::Drawing::Point(224, 17);
			this->btnReturn->Name = S"btnReturn";
			this->btnReturn->Size = System::Drawing::Size(344, 40);
			this->btnReturn->TabIndex = 0;
			this->btnReturn->Text = S"还书";
			this->btnReturn->Click += new System::EventHandler(this, btnReturn_Click);
			// 
			// BookReturn
			// 
			this->AutoScaleBaseSize = System::Drawing::Size(6, 14);
			this->ClientSize = System::Drawing::Size(760, 429);
			this->Controls->Add(this->groupBox2);
			this->Controls->Add(this->dgrdBooks);
			this->Controls->Add(this->groupBox1);
			this->Name = S"BookReturn";
			this->Text = S"图书归还";
			this->groupBox1->ResumeLayout(false);
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->dgrdBooks))->EndInit();
			this->groupBox2->ResumeLayout(false);
			this->ResumeLayout(false);

		}		
	private:		
		//-----------------------设置表格各列的属性-----------------------
		void DataGridStateControl()
		{

			DataGridTableStyle* ts = new DataGridTableStyle();			
			ts->MappingName = this->ds->Tables->Item[S"图书借阅"]->TableName;
			
			DataGridNoActiveCellColumn* aTextColumn;
			ts->AllowSorting = false;
			ts->AlternatingBackColor = Color::LightGray;

			int numCols = this->ds->Tables->Item[S"图书借阅"]->Columns->Count;
			for(int i = 0;i < numCols;i++)
			{
				aTextColumn = new DataGridNoActiveCellColumn();
				aTextColumn->get_TextBox()->Enabled = false;
				aTextColumn->MappingName = this->ds->Tables->Item[S"图书借阅"]->Columns->Item[i]->ColumnName;
				aTextColumn->HeaderText = this->ds->Tables->Item[S"图书借阅"]->Columns->Item[i]->ColumnName;
				aTextColumn->NullText = S"";
				aTextColumn->Format = S"D";
				ts->GridColumnStyles->Add(aTextColumn);
			}

			this->dgrdBooks->TableStyles->Add(ts);
  		 }

		 //---------按条件查询-----------
private: System::Void btnSearch_Click(System::Object *  sender, System::EventArgs *  e)
		 {
			 String* strBookID = this->tBoxBookID->Text->Trim();
			 String* strReaderID = this->tBoxReaderID->Text->Trim();
			 String* strReaderName = this->tBoxReaderName->Text->Trim();
			 //填写参数
			 this->BookReturnAdapter->SelectCommand->Parameters->Item[S"@图书编号"]->Value = String::Format(S"%{0}%",strBookID);
			 this->BookReturnAdapter->SelectCommand->Parameters->Item[S"@读者编号"]->Value = String::Format(S"%{0}%",strReaderID);
			 this->BookReturnAdapter->SelectCommand->Parameters->Item[S"@读者姓名"]->Value = String::Format(S"%{0}%",strReaderName);
			 //更新数据集
			 this->ds->Tables->Item[S"图书借阅"]->Clear();
			 this->BookReturnAdapter->Fill(this->ds,S"图书借阅");
		 }	
private: System::Void btnReturn_Click(System::Object *  sender, System::EventArgs *  e)
		 {
			 int row = this->dgrdBooks->CurrentCell.RowNumber;
			 String* BorrowID =  this->ds->Tables->Item[S"图书借阅"]->Rows->Item[row]->Item[S"借阅编号"]->ToString();
			 DateTime DueTime = System::Convert::ToDateTime(this->ds->Tables->Item[S"图书借阅"]->Rows->Item[row]->Item[S"应还时间"]);
			 Decimal Penalty = 0;
			 //图书过期处理
			 if(DueTime < System::DateTime::Now)
			 {
				 int OverDays = 365*(System::DateTime::Now.Year - DueTime.Year) + (System::DateTime::Now.DayOfYear - DueTime.DayOfYear);
				 //计算罚金，本实例中过期一天罚金为0.2元
				 Penalty = (Decimal)(0.2 * OverDays);
				 //提示
				 String* temp = String::Format(S"借阅已过期，罚款{0}元",Penalty.ToString());
				 MessageBox::Show(temp);
			 }
			 //还书
			 String* tempSQL = String::Format(S"exec sf_图书归还 {0},{1}",BorrowID,Penalty.ToString());
			 this->MyDataBase->SQLOperate(tempSQL);
			 //更新数据集
			 this->ds->Tables->Item[S"图书借阅"]->Clear();
			 this->BookReturnAdapter->Fill(this->ds,S"图书借阅");
		 }

};
}