孙鑫VC++深入详解:Lesson7 Part2---访问静态文本控件的七种方法

静态文本控件要能响应鼠标点击消息,两个特殊的步骤:

第一步:改变它的ID

第二部:勾选Notify

方式一 GetDlgItem()->GetWindowText();
方式二 GetDlgItemText();SetDlgItemText();
方式三 GetDlgItemInt(); SetDlgItemInt();
方式四 将三个EDIT编辑框关联到当前CTestDlg类的3个成员变量,是普通的内置数据类型如int的成员变量
方式五 将三个EDIT编辑框关联到当前CTestDlg类的控件类型的成员变量,如CEdit类型的控件
方式六 向控件发送SendMessage()的方式来获取或者设置控件窗口的文本
方式七 SendDlgItemMessage()

//--

方式一 GetDlgItem()->GetWindowText();
/*
GetDlgItem(IDC_EDIT1)->GetWindowText(ch1,10);
GetDlgItem(IDC_EDIT2)->GetWindowText(ch2,10);    
num1 = atoi(ch1);
num2  =atoi(ch2);
num3 = num1+num2;
itoa(num3,ch3,10);
GetDlgItem(IDC_EDIT3)->SetWindowText(ch3);
*/


方式二 GetDlgItemText();SetDlgItemText();
/*
GetDlgItemText(IDC_EDIT1,ch1,10);
GetDlgItemText(IDC_EDIT2,ch2,10);
num1 = atoi(ch1);
num2 = atoi(ch2);
num3 = num1 + num2;
itoa(num3,ch3,10);
SetDlgItemText(IDC_EDIT3,ch3);
*/


方式三 GetDlgItemInt(); SetDlgItemInt();
/*
num1 = GetDlgItemInt(IDC_EDIT1);
num2 = GetDlgItemInt(IDC_EDIT2);
num3 = num1 + num2;
SetDlgItemInt(IDC_EDIT3,num3);
    */


 方式四 将三个EDIT编辑框关联到当前CTestDlg类的3个成员变量,是普通的内置数据类型如int的成员变量
    // DDX_TEXT函数将EDIT1的内容转换到m_num1

// 让UpdateData()去调用DoDataExchange(), true 就是获取对话框中输入的数据并赋予变量
UpdateData(true); m_num1
m_num3 = m_num1 + m_num2;
UpdateData(false); //用变量m_mum3的值去初始化对话框IDC_EDIT3

---  快捷键 Ctrl + M 调出MFC ClassWizard, 这是个集成的快捷设计工具

--- 


方式五 将三个EDIT编辑框关联到当前CTestDlg类的控件类型的成员变量,如CEdit类型的控件

        m_edit1.GetWindowText(ch1,10);
m_edit2.GetWindowText(ch2,10);
num1 = atoi(ch1);
num2 = atoi(ch2);
num3 = num1 + num2;
itoa(num3,ch3,10);
m_edit3.SetWindowText(ch3);

---

方式六 向控件发送SendMessage()的方式来获取或者设置控件窗口的文本
 注意: 要在MSDN中查看WM_GETTEXT和WM_SETTEXT,才能看到SendMessage()的这种参数用法,单纯的查看SendMessage()是看不到这种参数传入wParam和lParam的用法的.
 是谁给谁发送啊? 是点击的那个ADD按钮给控件窗口发送?
 要获得窗口文本用WM_GETTEXT,设置则用WM_SETTEXT
点击按钮是向编辑框EDIT1发送消息要求获得其文本,保存到ch1
/*
WM_GETTEXT
An application sends a WM_GETTEXT message to copy the text that corresponds to a window into a buffer provided by the caller. 

 To send this message, call the SendMessage function with the following parameters. 
 
SendMessage( 
(HWND) hWnd,              // handle to destination window 
WM_GETTEXT,               // message to send
(WPARAM) wParam,          // number of characters to copy
(LPARAM) lParam           // text buffer这时候这里居然是buffer了,这个参数真实多变....
);


  WM_SETTEXT
  An application sends a WM_SETTEXT message to set the text of a window. 
  
To send this message, call the SendMessage function with the following parameters. 

 SendMessage( 
 (HWND) hWnd,              // handle to destination window 
 WM_SETTEXT,               // message to send
 (WPARAM) wParam,          // not used; must be zero
 (LPARAM) lParam           // window-text string (LPCTSTR)
 );

*/
//调用SDK函数,要加双冒号::,最后要强制转换,有点疑惑,ch1是char,lparam是LPARAM要转换

::SendMessage(GetDlgItem(IDC_EDIT1)->m_hWnd,WM_GETTEXT,10,(LPARAM)ch1); 
::SendMessage(GetDlgItem(IDC_EDIT2)->m_hWnd,WM_GETTEXT,10,(LPARAM)ch2); 
num1 = atoi(ch1);
num2 = atoi(ch2);
num3 = num1 + num2;
itoa(num3,ch3,10);
m_edit3.SendMessage(WM_SETTEXT,0,(LPARAM)ch3);
/* 
(1)或者用IDC_EDIT1关联的成员控件变量m_edit1去获得IDC_EDIT1的窗口句柄
    ::SendMessage(m_edit1.m_hWnd,WM_GETTEXT,10,(LPARAM)ch1);
(2) 或者直接调用IDC_EDIT1的SendMessage(),那是自己发给自己?看MSDN解释:"An application sends a WM_GETTEXT message,.....call SendMessage() " 没有说是谁call
GetDlgItem(IDC_EDIT1)->SendMessage(WM_GETTEXT,10,(LPARAM)ch1);
(3) 直接用关联的控件m_edit1,控件也是窗口,调用SendMessage
      m_edit1.SendMessage(WM_GETTEXT,10,(LPARAM)ch1)
*/



 方式七 SendDlgItemMessage()
SendDlgItemMessage(IDC_EDIT1,WM_GETTEXT,10,(LPARAM)ch1);
SendDlgItemMessage(IDC_EDIT2,WM_GETTEXT,10,(LPARAM)ch2);
num1 = atoi(ch1);
num2 = atoi(ch2);
num3 = num1 + num2;
itoa(num3,ch3,10);
SendDlgItemMessage(IDC_EDIT3,WM_SETTEXT,0,(LPARAM)ch3);

//---

// TestDlg.cpp : implementation file//#include "stdafx.h"#include "Mybole.h"#include "TestDlg.h"#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE[] = __FILE__;#endif/////////////////////////////////////////////////////////////////////////////// CTestDlg dialog//构造函数,用基类CDialog构造函数传入IDD,这个IDD就是IDD_DIALOG1,IDD在TestDlg.h中定义的.CTestDlg::CTestDlg(CWnd* pParent /*=NULL*/): CDialog(CTestDlg::IDD, pParent){//{{AFX_DATA_INIT(CTestDlg)m_num1 = 0;m_num2 = 0;m_num3 = 0;//}}AFX_DATA_INITm_bIsCreate = false;}void CTestDlg::DoDataExchange(CDataExchange* pDX){CDialog::DoDataExchange(pDX);//{{AFX_DATA_MAP(CTestDlg)DDX_Control(pDX, IDC_EDIT3, m_edit3);DDX_Control(pDX, IDC_EDIT2, m_edit2);DDX_Control(pDX, IDC_EDIT1, m_edit1);DDX_Text(pDX, IDC_EDIT1, m_num1);DDX_Text(pDX, IDC_EDIT2, m_num2);DDX_Text(pDX, IDC_EDIT3, m_num3);//}}AFX_DATA_MAP}BEGIN_MESSAGE_MAP(CTestDlg, CDialog)//{{AFX_MSG_MAP(CTestDlg)ON_BN_CLICKED(ID_BTN_ADD, OnBtnAdd)ON_BN_CLICKED(IDC_NUMBER1, OnNumber1)//}}AFX_MSG_MAPEND_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////// CTestDlg message handlersvoid CTestDlg::OnBtnAdd() {// TODO: Add your control notification handler code here//--- 创建按钮/*static bool m_bIsCreate = false;if(m_bIsCreate==false){m_btn.Create("微信",BS_DEFPUSHBUTTON|WS_VISIBLE|WS_CHILD,CRect(0,0,100,100),this,123);m_bIsCreate = true;}else{  m_btn.DestroyWindow();  m_bIsCreate = false;}*///---利用m_btn对象中的成员m_hWnd来判断按钮是否创建./*  if(m_btn.m_hWnd==NULL)  m_btn.Create("微信",BS_DEFPUSHBUTTON|WS_VISIBLE|WS_CHILD,CRect(0,0,100,100),this,123);     else  m_btn.DestroyWindow();   */int num1,num2,num3;char ch1[10],ch2[10],ch3[10];//------ 方式一 GetDlgItem()->GetWindowText();/*GetDlgItem(IDC_EDIT1)->GetWindowText(ch1,10);GetDlgItem(IDC_EDIT2)->GetWindowText(ch2,10);    num1 = atoi(ch1);num2  =atoi(ch2);num3 = num1+num2;itoa(num3,ch3,10);GetDlgItem(IDC_EDIT3)->SetWindowText(ch3);*///------ 方式二 GetDlgItemText();SetDlgItemText();/*GetDlgItemText(IDC_EDIT1,ch1,10);GetDlgItemText(IDC_EDIT2,ch2,10);num1 = atoi(ch1);num2 = atoi(ch2);num3 = num1 + num2;itoa(num3,ch3,10);SetDlgItemText(IDC_EDIT3,ch3);*///------ 方式三 GetDlgItemInt(); SetDlgItemInt();/*num1 = GetDlgItemInt(IDC_EDIT1);num2 = GetDlgItemInt(IDC_EDIT2);num3 = num1 + num2;SetDlgItemInt(IDC_EDIT3,num3);    *///------ 方式四 将三个EDIT编辑框关联到当前CTestDlg类的3个成员变量,是普通的内置数据类型如int的成员变量     // DDX_TEXT函数将EDIT1的内容转换到m_num1/*UpdateData(true); // 让UpdateData()去调用DoDataExchange(), true 就是获取对话框中输入的数据并赋予变量m_num1m_num3 = m_num1 + m_num2;UpdateData(false); //用变量m_mum3的值去初始化对话框IDC_EDIT3*///------ 方式五 将三个EDIT编辑框关联到当前CTestDlg类的控件类型的成员变量,如CEdit类型的控件 /*    m_edit1.GetWindowText(ch1,10);m_edit2.GetWindowText(ch2,10);num1 = atoi(ch1);num2 = atoi(ch2);num3 = num1 + num2;itoa(num3,ch3,10);m_edit3.SetWindowText(ch3);*///------ 方式六 向控件发送SendMessage()的方式来获取或者设置控件窗口的文本// 注意: 要在MSDN中查看WM_GETTEXT和WM_SETTEXT,才能看到SendMessage()的这种参数用法,单纯的查看SendMessage()是看不到这种参数传入wParam和lParam的用法的.     // 是谁给谁发送啊? 是点击的那个ADD按钮给控件窗口发送?         // 要获得窗口文本用WM_GETTEXT,设置则用WM_SETTEXT//点击按钮是向编辑框EDIT1发送消息要求获得其文本,保存到ch1/*WM_GETTEXTAn application sends a WM_GETTEXT message to copy the text that corresponds to a window into a buffer provided by the caller.   To send this message, call the SendMessage function with the following parameters.   SendMessage( (HWND) hWnd,              // handle to destination window WM_GETTEXT,               // message to send(WPARAM) wParam,          // number of characters to copy(LPARAM) lParam           // text buffer这时候这里居然是buffer了,这个参数真实多变....);  WM_SETTEXT  An application sends a WM_SETTEXT message to set the text of a window.   To send this message, call the SendMessage function with the following parameters.   SendMessage(   (HWND) hWnd,              // handle to destination window   WM_SETTEXT,               // message to send  (WPARAM) wParam,          // not used; must be zero  (LPARAM) lParam           // window-text string (LPCTSTR)  );  Parameters *///调用SDK函数,要加双冒号::,最后要强制转换,有点疑惑,ch1是char,lparam是LPARAM要转换::SendMessage(GetDlgItem(IDC_EDIT1)->m_hWnd,WM_GETTEXT,10,(LPARAM)ch1); ::SendMessage(GetDlgItem(IDC_EDIT2)->m_hWnd,WM_GETTEXT,10,(LPARAM)ch2); num1 = atoi(ch1);num2 = atoi(ch2);num3 = num1 + num2;itoa(num3,ch3,10);m_edit3.SendMessage(WM_SETTEXT,0,(LPARAM)ch3);/* (1)或者用IDC_EDIT1关联的成员控件变量m_edit1去获得IDC_EDIT1的窗口句柄    ::SendMessage(m_edit1.m_hWnd,WM_GETTEXT,10,(LPARAM)ch1);(2) 或者直接调用IDC_EDIT1的SendMessage(),那是自己发给自己?看MSDN解释:"An application sends a WM_GETTEXT message,.....call SendMessage() " 没有说是谁callGetDlgItem(IDC_EDIT1)->SendMessage(WM_GETTEXT,10,(LPARAM)ch1);(3) 直接用关联的控件m_edit1,控件也是窗口,调用SendMessage      m_edit1.SendMessage(WM_GETTEXT,10,(LPARAM)ch1)*///------ 方式七 SendDlgItemMessage()SendDlgItemMessage(IDC_EDIT1,WM_GETTEXT,10,(LPARAM)ch1);SendDlgItemMessage(IDC_EDIT2,WM_GETTEXT,10,(LPARAM)ch2);num1 = atoi(ch1);num2 = atoi(ch2);num3 = num1 + num2;itoa(num3,ch3,10);SendDlgItemMessage(IDC_EDIT3,WM_SETTEXT,0,(LPARAM)ch3);}// -----静态文本的访问void CTestDlg::OnNumber1() {// TODO: Add your control notification handler code here   CString str;   if(GetDlgItem(IDC_NUMBER1)->GetWindowText(str),str="Number1:")   {   GetDlgItem(IDC_NUMBER1)->SetWindowText("数值1:");   }   else   {GetDlgItem(IDC_NUMBER1)->SetWindowText("Number1:");   }}