bookdue.cpp

基于bcb数据库应用

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "BookDue.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma link "Parent"
#pragma resource "*.dfm"
TfmBookDue *fmBookDue;
//---------------------------------------------------------------------------
__fastcall TfmBookDue::TfmBookDue(TComponent* Owner)
    : TfmParent(Owner)
{
    this->szCondition1 = "读者编号";
    this->szCondition2 = "读者条码";
    this->szCondition3 = "图书编号";
    // 设置查询条件
    this->SetSeekEditStatus();
    // 和以前的窗体不一样,我们在这里打开Table1
    Table1->Active = true;
    // 设置过虑条件
    TDateTime dt;
    dt = dt.CurrentDate();
    m_szFilter = "状态='未还' and 应还时间<'";
    m_szFilter += dt.DateString() + "'";
    Table1->Filtered = false;
    Table1->Filter = m_szFilter;
    Table1->Filtered = true;
    lblCount->Caption = "记录数: " + IntToStr(Table1->RecordCount) ;
}
//---------------------------------------------------------------------------

void __fastcall TfmBookDue::BitBtn1Click(TObject *Sender)
{
    // 注意这里的代码
    // 因为DBGrid只显示没有归还的数据
    // 所以要继承搜索按钮
    // 添加filter属性
    TfmParent::BitBtn1Click(Sender);
    AnsiString szFilter;
    szFilter = Table1->Filter;
    if(szFilter.Length()>0)
       szFilter += " and ";
    szFilter += m_szFilter;
    Table1->Filtered = false;
    Table1->Filter = szFilter;
    Table1->Filtered = true;
    lblCount->Caption = "记录数: " + IntToStr(Table1->RecordCount) ;
}
//---------------------------------------------------------------------------