CListCtrl控件中InsertItem和SettItemtext函数的用法简介

CListCtrl控件中InsertItem和SettItemtext函数的用法简介

本人初次用CListCtrl控件的时候,对于 InsertItem和SetrtItemtext两个函数的作用始终不是太懂,比如如果不先调用InsertItem这个函数,后面的InsertItemtext函数写了,也不起作用.查了MSDN,也没有收获,经过有人点拔,才恍然大悟.今天将经验说一下,希望有共同爱好者少走弯路.

InsertItem在MSDN中的函数原型如下

int InsertItem( const LVITEM* pItem
);

int InsertItem( int nItem, LPCTSTR lpszItem );

int InsertItem( int nItem, LPCTSTR lpszItem, int
nImage );

int InsertItem( UINT nMask, int nItem, LPCTSTR
lpszItem, UINT nState, UINT nStateMask, int
nImage, LPARAM lParam );
一般我们用的比较多的时第2种和第三种,其中第三种时建立一个带有头标的项

要调用第三个,可以先声明一个CImageList对象

m_ImageList.Create(16,16,true,2,2);

m_ImageList.Add(theApp.LoadIcon(IDR_MAINFRAME));

m_ListCtrl.SetImageList(&m_ImageList,LVSIL_SMALL);

这样,控件中的每一行的开头就有一个应用程序图标

   现在转入正题,先介绍一下INSERTITEM个个参数的意义

nItem:    控件中行的索引

lpszItem : 控件头的名字

     .........................................................................................................................................................................................................

SettItemtext函数的原型

BOOL SetItemText( int nItem, int nSubItem, LPTSTR lpszText
);
******************注意这个函数中的参数nItem就是INSERTITEM中的NITEM,

也就是说InsertItem是向控件声请一行来放数据,记住只是声请,那么方数据的工作就又SETITEMTEXT来实现

举例如下:

   CListCtrl m_listctrl;

   m_listctrl = new ClistCtrl();

   m_listctrl.Creae(WS_CHILD|WS_VISIBLE|WS_BORDER|LVS_REPORT|LVS_EDITLABELS,bigRect,this,IDC_LIST1);   

   m_listctrl.InsertItem(0,"01");

   m_SetItemtext(0,1,"1");

   m_SetItemtext(0,2,"2");

   ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

   至于要添多少多少个数据,就由你的控件由多少列了

   获得可以这样的道 int columns= m_listctr.GetHeaderCtrl()->GetItemCount();

   获得可以这样的道 int   rows= m_listctrl.GetItemCount();

     

   下面附一个本人学习的实例

　　// DataView.cpp : implementation of the CDataView class

//

#include "stdafx.h"

#include "Data.h"

#include "DataDoc.h"

#include "DataView.h"

#include "EditDlg.h"

#ifdef _DEBUG

#define new DEBUG_NEW

#undef THIS_FILE

static char THIS_FILE[] = __FILE__;

#endif

/////////////////////////////////////////////////////////////////////////////

// CDataView

IMPLEMENT_DYNCREATE(CDataView, CView)

BEGIN_MESSAGE_MAP(CDataView, CView)

//{{AFX_MSG_MAP(CDataView)

ON_COMMAND(IDM_USER, OnUser)

ON_COMMAND(IDM_UP, OnUp)

ON_COMMAND(IDM_DOWN, OnDown)

ON_COMMAND(IDM_EDIT, OnEdit)

ON_COMMAND(IDM_ADD, OnAdd)

ON_COMMAND(IDM_DELETE, OnDelete)

ON_COMMAND(IDM_SAVE, OnSave)

//}}AFX_MSG_MAP

// Standard printing commands

ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)

ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)

ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)

ON_NOTIFY(NM_CLICK, IDC_LIST1, OnClickList1)

ON_NOTIFY(NM_DBLCLK, IDC_LIST1, OnDblclkList1)

ON_NOTIFY(NM_KILLFOCUS, IDC_LIST1, OnKillfocusList1)

END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////

// CDataView construction/destruction

CDataView::CDataView()

{

// TODO: add construction code here

    m_nIndex = -1;

}

CDataView::~CDataView()

{

}

BOOL CDataView::PreCreateWindow(CREATESTRUCT& cs)

{

// TODO: Modify the Window class or styles here by modifying

// the CREATESTRUCT cs

return CView::PreCreateWindow(cs);

}

/////////////////////////////////////////////////////////////////////////////

// CDataView drawing

void CDataView::OnDraw(CDC* pDC)

{

CDataDoc* pDoc = GetDocument();

ASSERT_VALID(pDoc);

// TODO: add draw code for native data here

}

/////////////////////////////////////////////////////////////////////////////

// CDataView printing

BOOL CDataView::OnPreparePrinting(CPrintInfo* pInfo)

{

// default preparation

return DoPreparePrinting(pInfo);

}

void CDataView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)

{

// TODO: add extra initialization before printing

}

void CDataView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)

{

// TODO: add cleanup after printing

}

/////////////////////////////////////////////////////////////////////////////

// CDataView diagnostics

#ifdef _DEBUG

void CDataView::AssertValid() const

{

CView::AssertValid();

}

void CDataView::Dump(CDumpContext& dc) const

{

CView::Dump(dc);

}

CDataDoc* CDataView::GetDocument() // non-debug version is inline

{

ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDataDoc)));

return (CDataDoc*)m_pDocument;

}

#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////

// CDataView message handlers

void CDataView::OnInitialUpdate()

{

CView::OnInitialUpdate();

// TODO: Add your specialized code here and/or call the base class

    CDC *dc = GetDC();

CRect rect;

this->GetClientRect(&rect);

    CString str = "加载数据库资源到列表中";

CSize sz = dc->GetTextExtent(str);

rect.right = sz.cx;

rect.bottom = sz.cy;

CStatic *state = new CStatic;

state->Create(str,WS_CHILD,rect,this);

    state->ShowWindow(SW_SHOW);

    this->ReleaseDC(dc);

InitListCtrl(rect);

m_ImageList.Create(16,16,true,2,2);

m_ImageList.Add(theApp.LoadIcon(IDR_MAINFRAME));

}

void CDataView::InitListCtrl(CRect rect)

{

CRect bigRect;

this->GetClientRect(&bigRect);

bigRect.top = rect.bottom;

m_ListCtrl.Create(WS_CHILD|WS_VISIBLE|WS_BORDER|LVS_REPORT|LVS_EDITLABELS

   ,bigRect,this,IDC_LIST1);

//m_ListCtrl.Insert(0,"用户名");

//m_ListCtrl.InsertItem(1,"密码");

CFont *m_pFont = new CFont();

m_pFont->CreateFont(20,                        // nHeight

   0,                         // nWidth

   0,                         // nEscapement

   0,                         // nOrientation

   FW_NORMAL,                 // nWeight

   FALSE,                     // bItalic

   FALSE,                     // bUnderline

   0,                         // cStrikeOut

   DEFAULT_CHARSET,              // nCharSet

   OUT_DEFAULT_PRECIS,        // nOutPrecision

   CLIP_DEFAULT_PRECIS,       // nClipPrecision

   DEFAULT_QUALITY,           // nQuality

   DEFAULT_PITCH | FF_SWISS, // nPitchAndFamily

   "Arial");  

    m_ListCtrl.SetFont(m_pFont);

    m_ListCtrl.SetImageList(&m_ImageList,LVSIL_SMALL);

m_ListCtrl.SetExtendedStyle(LVS_EX_FULLROWSELECT|LVS_EX_GRIDLINES);

m_ListCtrl.SetBkColor(RGB(247,247,255));

    m_ListCtrl.SetTextColor(RGB(0,0,255));

    m_ListCtrl.SetTextBkColor(RGB(247,247,255));

m_ListCtrl.InsertColumn(0,"ID",LVCFMT_LEFT,100,-1);

m_ListCtrl.InsertColumn(1,"用户名",LVCFMT_LEFT,100,-1);

m_ListCtrl.InsertColumn(2,"密码",LVCFMT_LEFT,200,-1);

m_ListCtrl.InsertItem(0,"01");

m_ListCtrl.SetItemText(0,1,"chetnao");

m_ListCtrl.SetItemText(0,2,"921984");

    m_ListCtrl.InsertItem(1,"02");

m_ListCtrl.SetItemText(1,1,"mada");

m_ListCtrl.SetItemText(1,2,"345678");

m_ListCtrl.InsertItem(2,"03");

m_ListCtrl.SetItemText(2,1,"luoxian");

m_ListCtrl.SetItemText(2,2,"987654");

}

extern CDataApp theApp;

void CDataView::OnUser()

{

// TODO: Add your command handler code here

    _RecordsetPtr m_pRecordset;

try

{

   m_pRecordset = theApp.m_pConnection->Execute("select * from user12",NULL,adCmdText);

}

catch(_com_error e)

{

   AfxMessageBox(e.ErrorMessage());

   AfxMessageBox(e.Description());

   CString str;

   str.Format("%ld",e.Error);

   AfxMessageBox(str);

   return;

}

if(m_pRecordset->BOF)

{

   MessageBox("表中无记录");

   return;

}

else

{

   int len = m_ListCtrl.GetHeaderCtrl()->GetItemCount();

   while(!m_pRecordset->adoEOF)

   {

            m_ListCtrl.InsertItem(2,(_bstr_t)m_pRecordset->GetCollect("ID"));

      m_ListCtrl.InsertItem(1,(_bstr_t)m_pRecordset->GetCollect("username"));

         m_ListCtrl.InsertItem(0,(_bstr_t)m_pRecordset->GetCollect("password"));

    /*for(int i=0;i<len;i++)

    {

     m_ListCtrl.SetItemText(i,0,(_bstr_t)m_pRecordset->GetCollect("ID"));

     m_ListCtrl.SetItemText(i,1,(_bstr_t)m_pRecordset->GetCollect("username"));

     m_ListCtrl.SetItemText(i,2,(_bstr_t)m_pRecordset->GetCollect("password"));

    }*/

    m_pRecordset->MoveNext();

   }

}

}

void CDataView::OnClickList1(NMHDR* pNMHDR, LRESULT* pResult)

{

POSITION pos = m_ListCtrl.GetFirstSelectedItemPosition();

    m_nIndex = m_ListCtrl.GetNextSelectedItem(pos);

}

void CDataView::OnDblclkList1(NMHDR* pNMHDR, LRESULT* pResult)

{

    POSITION pos = m_ListCtrl.GetFirstSelectedItemPosition();

    m_nIndex = m_ListCtrl.GetNextSelectedItem(pos);

    CEditDlg dlg;

dlg.m_strNo = m_ListCtrl.GetItemText(m_nIndex,0);

dlg.m_strName = m_ListCtrl.GetItemText(m_nIndex,1);

dlg.m_strPassword = m_ListCtrl.GetItemText(m_nIndex,2);

    if(IDOK == dlg.DoModal())

{

   m_ListCtrl.SetItemText(m_nIndex,0,dlg.m_strNo);

        m_ListCtrl.SetItemText(m_nIndex,1,dlg.m_strName);

   m_ListCtrl.SetItemText(m_nIndex,2,dlg.m_strPassword);

}

*pResult = 0;

}

void CDataView::OnUp()

{

// TODO: Add your command handler code here

    m_ListCtrl.SetFocus();

if(m_nIndex == -1)

{

   MessageBox("请选择一行!");

   return ;

}

if(m_nIndex == 0)

{

   MessageBox("你选中的行已经时顶行!");

   return ;

}

CString strNo,strName,strPassword;

strNo = m_ListCtrl.GetItemText(m_nIndex,0);

strName = m_ListCtrl.GetItemText(m_nIndex,1);

strPassword = m_ListCtrl.GetItemText(m_nIndex,2);

m_ListCtrl.DeleteItem(m_nIndex);

m_ListCtrl.InsertItem(m_nIndex-1,strNo);

m_ListCtrl.SetItemText(m_nIndex-1,1,strName);

    m_ListCtrl.SetItemText(m_nIndex-1,2,strPassword);

    m_nIndex--;

m_ListCtrl.SetItemState(m_nIndex,LVIS_FOCUSED|LVIS_SELECTED,LVIS_FOCUSED|LVIS_SELECTED);

}

void CDataView::OnKillfocusList1(NMHDR* pNMHDR, LRESULT* pResult)

{

m_nIndex = -1;

}

void CDataView::OnDown()

{

// TODO: Add your command handler code here

m_ListCtrl.SetFocus();

    if(m_nIndex == -1)

{

   MessageBox("请选择一行!");

   return ;

}

if(m_nIndex == m_ListCtrl.GetItemCount()-1)

{

   MessageBox("已经时最后一行!");

   return ;

}

CString strNo,strName,strPassword;

strNo = m_ListCtrl.GetItemText(m_nIndex,0);

strName = m_ListCtrl.GetItemText(m_nIndex,1);

strPassword = m_ListCtrl.GetItemText(m_nIndex,2);

m_ListCtrl.DeleteItem(m_nIndex);

m_ListCtrl.InsertItem(m_nIndex+1,strNo);

m_ListCtrl.SetItemText(m_nIndex+1,1,strName);

    m_ListCtrl.SetItemText(m_nIndex+1,2,strPassword);

    m_nIndex++;

    m_ListCtrl.SetItemState(m_nIndex,LVIS_FOCUSED|LVIS_SELECTED,LVIS_FOCUSED|LVIS_SELECTED);

}

void CDataView::OnEdit()

{

// TODO: Add your command handler code here

POSITION pos = m_ListCtrl.GetFirstSelectedItemPosition();

    m_nIndex = m_ListCtrl.GetNextSelectedItem(pos);

    if(m_nIndex == -1)

{

   MessageBox("请选择一行!");

   return ;

}

CEditDlg dlg;

dlg.m_strNo = m_ListCtrl.GetItemText(m_nIndex,0);

dlg.m_strName = m_ListCtrl.GetItemText(m_nIndex,1);

dlg.m_strPassword = m_ListCtrl.GetItemText(m_nIndex,2);

    if(IDOK == dlg.DoModal())

{

   m_ListCtrl.SetRedraw(false);

   m_ListCtrl.DeleteItem(m_nIndex);

        m_ListCtrl.InsertItem(m_nIndex,dlg.m_strNo);

        m_ListCtrl.SetItemText(m_nIndex,1,dlg.m_strName);

   m_ListCtrl.SetItemText(m_nIndex,2,dlg.m_strPassword);

   m_ListCtrl.SetRedraw(true);

}

}

void CDataView::OnAdd()

{

// TODO: Add your command handler code here

CEditDlg dlg;

if(dlg.DoModal() == IDOK)

{

   int count=m_ListCtrl.InsertItem(m_ListCtrl.GetItemCount(),dlg.m_strNo);

   m_ListCtrl.SetItemText(count,1,dlg.m_strName);

        m_ListCtrl.SetItemText(count,2,dlg.m_strPassword);

}

}

void CDataView::OnDelete()

{

// TODO: Add your command handler code here

if(m_nIndex == -1)

{

   MessageBox("请选择一行!");

   return ;

}

m_ListCtrl.DeleteItem(m_nIndex);

UINT flag = LVIS_SELECTED|LVIS_FOCUSED;

    m_ListCtrl.SetItemState(m_nIndex-1, flag, flag);

}

 

void CDataView::OnSave()

{

// TODO: Add your command handler code here

CFile f;

if(f.Open("save.txt",CFile::modeCreate|CFile::modeWrite,NULL))

{

   CString str="ID号/t/tusername/t/tpassword/r/n";

   f.Write(str,strlen(str)+1);

   for(int i=0;i<m_ListCtrl.GetItemCount();i++)

   {

    str=m_ListCtrl.GetItemText(i,0)+"/t/t"+m_ListCtrl.GetItemText(i,1)+

     "/t/t"+m_ListCtrl.GetItemText(i,2)+"/r/n";

            f.Write(str,strlen(str)+1);

   }

   f.Close();

   MessageBox("保存成功!");

}

else

{

   MessageBox("保存失败!");

}

}