Win32_组合框
一 组合框
1 组合框的样式
1.1 简单组合框 CBS_SIMPLE
1.2 下拉式组合框 CBS_DROPDOWN 能输入或者从下拉列表中选择
1.3 下拉列表式组合框 CBS_DROPDOWNLIST 只能从下拉列表中选择
2 组合框的使用
2.1 组合框的创建
窗口类名称是 COMBOBX,使用 CreateWindow 创建，创建时要注意
窗口高度(弹出的列表)
2.2 增加选项
CB_ADDSTRING / CB_INSERTSTRING
CB_ADDSTRING : WPARAM 为0不使用
LPARAM 是添加字符串的地址
2.3 删除选项
CB_DELETESTRING 删除指定选项
CB_RESETCONTENT 清空所有选项
2.4 选择和查找
CB_GETCURSEL 获取被选择项
CB_SETCURSEL 设置当前的选择项
CB_SELECTSTRING 设置选择指定的字符串所对应项
CB_FINDSTRING 根据指定的字符串，找到对应项的索引，
大小写不敏感；字符串和选项从左至右匹配；选项包含字符串即可。
2.5 获取选项或被选择字符串
CB_GETLBTEXT 获取选项的字符
WM_GETTEX 获取被选择到窗口字符串
2.6 选项的数据
可以将自定义数据信息，在选项中设置和获取
CB_SETITEMDATA 将数据保存到选项中
CB_GETITEMDATA 从选项当中获取数据
2.7 目录显示
CB_DIR 将指定路径下的文件和路径信息显示在ComboBox当中
wParam - 显示的类型
lParam - 路径字符串地址
2.8 通知消息
通过 WM_COMMAND 消息，通知父窗口
CBN_SELCHANGE 当窗口的选项发生变化情况下，通知父窗口
View Code
1 // WinDlg.cpp : Defines the entry point for the application. 2 // 3 4 #include "stdafx.h" 5 #include "resource.h" 6 #include "stdio.h" 7 8 HINSTANCE g_hInst = NULL; 9 10 /************************************************* 11 * 函数：OnCreate() 12 * 功能：添加组合框 13 **************************************************/ 14 15 void OnCreate(HWND hWnd,UINT nMsg, 16 WPARAM wParam,LPARAM lParam) 17 { 18 //简单组合框的创建 19 CreateWindow("COMBOBOX","SIMPLE",WS_CHILD | WS_VISIBLE | 20 CBS_SIMPLE,50,50,100,300,hWnd,(HMENU)1001,g_hInst,NULL); 21 22 //下拉式组合框的创建 23 CreateWindow("COMBOBOX","DROPDOWD",WS_CHILD | WS_VISIBLE | WS_VSCROLL | 24 CBS_DROPDOWN,200,50,100,300,hWnd,(HMENU)1002,g_hInst,NULL); 25 //下拉列表式组合框的创建 26 CreateWindow("COMBOBOX","DROPDOWNLIST",WS_CHILD | WS_VISIBLE | WS_VSCROLL | 27 CBS_DROPDOWNLIST,350,50,100,300,hWnd,(HMENU)1003,g_hInst,NULL); 28 } 29 30 /************************************************* 31 * 函数：OnAdd () 32 * 功能：添加选项 33 **************************************************/ 34 35 void OnAdd(HWND hWnd) 36 { 37 38 HWND hSimple = GetDlgItem(hWnd,1001);//获取COMBOBOX窗口句柄 39 HWND hDropDown = GetDlgItem(hWnd,1002); 40 HWND hDropList = GetDlgItem(hWnd,1003); 41 CHAR szText[] = "Hello 0"; 42 for(int nIndex = 0;nIndex <10;nIndex++)//添加选项 43 { 44 LRESULT nItem= SendMessage(hSimple,CB_ADDSTRING,0,(LPARAM)szText); 45 //设置项的数据 46 SendMessage(hSimple,CB_SETITEMDATA,nItem,100 + nIndex); 47 48 SendMessage(hDropDown,CB_ADDSTRING,0,(LPARAM)szText); 49 SendMessage(hDropList,CB_ADDSTRING,0,(LPARAM)szText); 50 szText[7]++; 51 } 52 } 53 54 /************************************************* 55 * 函数：OnDel() 56 * 功能：删除指定选项 57 **************************************************/ 58 59 void OnDel(HWND hWnd) 60 { 61 //获取 COMBOBOX 窗口句柄 62 HWND hSimple = GetDlgItem(hWnd,1001); 63 HWND hDropDowm = GetDlgItem(hWnd,1002); 64 HWND hDropList = GetDlgItem(hWnd,1003); 65 //删除指定项 66 SendMessage(hSimple,CB_DELETESTRING,5,0); 67 SendMessage(hDropDowm,CB_DELETESTRING,5,0); 68 SendMessage(hDropList,CB_DELETESTRING,5,0); 69 } 70 71 /************************************************* 72 * 函数：OnReset() 73 * 功能：清空选项 74 **************************************************/ 75 76 void OnReset(HWND hWnd) 77 { 78 //获取 COMBOBOX 窗口句柄 79 HWND hSimple = GetDlgItem(hWnd,1001); 80 HWND hDropDowm = GetDlgItem(hWnd,1002); 81 HWND hDropList = GetDlgItem(hWnd,1003); 82 //清空所有项 83 SendMessage(hSimple,CB_RESETCONTENT,0,0); 84 SendMessage(hDropDowm,CB_RESETCONTENT,0,0); 85 SendMessage(hDropList,CB_RESETCONTENT,0,0); 86 } 87 /************************************************* 88 * 函数：OnSelect() 89 * 功能：设置选择项 90 **************************************************/ 91 92 void OnSelect(HWND hWnd) 93 { 94 //获取 COMBOBOX 窗口句柄 95 HWND hSimple = GetDlgItem(hWnd,1001); 96 HWND hDropDowm = GetDlgItem(hWnd,1002); 97 HWND hDropList = GetDlgItem(hWnd,1003); 98 //获取和设置选项 99 LRESULT nSel = SendMessage(hSimple,CB_GETCURSEL,0,0); 100 //获取数据 101 LRESULT nValue = SendMessage(hSimple,CB_GETITEMDATA,nSel,0); 102 CHAR szInfo[260] = {0}; 103 sprintf(szInfo,"%d",nValue); 104 MessageBox(NULL,szInfo,"WinCombo",MB_OK); 105 106 //设置选择项 107 SendMessage(hDropDowm,CB_SETCURSEL,nSel,0); 108 CHAR szText[] = "Hello 2"; 109 SendMessage(hDropList,CB_SELECTSTRING,-1,(LPARAM)szText); 110 } 111 /************************************************* 112 * 函数：OnFind() 113 * 功能：查找 114 **************************************************/ 115 116 void OnFind(HWND hWnd) 117 { 118 //获取 COMBOBOX 窗口句柄 119 HWND hSimple = GetDlgItem(hWnd,1001); 120 HWND hDropDowm = GetDlgItem(hWnd,1002); 121 HWND hDropList = GetDlgItem(hWnd,1003); 122 123 //查找字符串 124 CHAR szText[] = "Hello 3"; 125 LRESULT nFind1 = SendMessage(hSimple,CB_FINDSTRING, 126 -1,(LPARAM)szText); 127 SendMessage(hDropDowm,CB_SETCURSEL,nFind1,0); 128 SendMessage(hDropList,CB_SETCURSEL,nFind1,0); 129 } 130 /************************************************* 131 * 函数：OnPath() 132 * 功能：显示目录 133 **************************************************/ 134 135 void OnPath(HWND hWnd) 136 { 137 //获取 COMBOBOX 窗口句柄 138 HWND hSimple = GetDlgItem(hWnd,1001); 139 140 //显示目录 141 CHAR szPath[MAX_PATH] = "C:\\*.*"; 142 SendMessage(hSimple,CB_DIR,DDL_DIRECTORY | DDL_ARCHIVE, 143 (LPARAM)szPath); 144 } 145 146 void OnCommand(HWND hWnd,UINT nMsg, 147 WPARAM wParam,LPARAM lParam) 148 { 149 int nNotifyCode = HIWORD(wParam); 150 int nEventID = LOWORD(wParam); 151 switch(nEventID) 152 { 153 case ID_ADD: 154 OnAdd(hWnd); 155 break; 156 case ID_DEL: 157 OnDel(hWnd); 158 break; 159 case ID_RESET: 160 OnReset(hWnd); 161 break; 162 case ID_SEL: 163 OnSelect(hWnd); 164 break; 165 case ID_FIND: 166 OnFind(hWnd); 167 break; 168 case ID_PATH: 169 OnPath(hWnd); 170 break; 171 case 1001: 172 { 173 HWND hSimple = GetDlgItem(hWnd,1001); 174 HWND hDropDowm = GetDlgItem(hWnd,1002); 175 HWND hDropList = GetDlgItem(hWnd,1003); 176 LRESULT nSel = 0; 177 switch(nNotifyCode) 178 { 179 case CBN_SELCHANGE: 180 nSel = SendMessage(hSimple,CB_GETCURSEL,0,0); 181 SendMessage(hDropDowm,CB_SETCURSEL,nSel,0); 182 SendMessage(hDropList,CB_SETCURSEL,nSel,0); 183 break; 184 } 185 } 186 break; 187 } 188 } 189 190 LRESULT CALLBACK WndProc(HWND hWnd, 191 UINT nMsg, 192 WPARAM wParam, 193 LPARAM lParam) 194 { 195 switch(nMsg) 196 { 197 case WM_CREATE: 198 OnCreate(hWnd,nMsg,wParam,lParam); 199 break; 200 case WM_COMMAND: 201 OnCommand(hWnd,nMsg,wParam,lParam); 202 break; 203 case WM_DESTROY: 204 PostQuitMessage(0); 205 return 0; 206 } 207 return DefWindowProc(hWnd,nMsg,wParam,lParam); 208 } 209 210 BOOL RegisterWnd(LPSTR pszClassName) 211 { 212 WNDCLASSEX wce = {0}; 213 wce.style = CS_HREDRAW | CS_VREDRAW; 214 wce.cbSize = sizeof(wce); 215 wce.cbClsExtra = 0; 216 wce.cbWndExtra = 0; 217 wce.hbrBackground = HBRUSH(COLOR_BTNFACE + 1); 218 wce.hCursor = NULL; 219 wce.hIcon = NULL; 220 wce.hIconSm = NULL; 221 wce.hInstance = g_hInst; 222 wce.lpfnWndProc = WndProc; 223 wce.lpszClassName = pszClassName; 224 wce.lpszMenuName = NULL; 225 226 ATOM nAtom = RegisterClassEx(&wce); 227 if (0 == nAtom) 228 { 229 return FALSE; 230 } 231 return TRUE; 232 } 233 234 HWND CreateWnd(LPSTR pszClassName) 235 { 236 HMENU hMenu = LoadMenu(g_hInst,MAKEINTRESOURCE(IDR_MAIN)); 237 HWND hWnd = CreateWindowEx(0,pszClassName,"MyWnd", 238 WS_OVERLAPPEDWINDOW,CW_USEDEFAULT, 239 CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,hMenu,g_hInst,NULL); 240 return hWnd; 241 } 242 243 void DisplayWnd(HWND hWnd) 244 { 245 ShowWindow(hWnd,SW_SHOW); 246 UpdateWindow(hWnd); 247 } 248 249 void Message() 250 { 251 MSG msg = {0}; 252 while(GetMessage(&msg,NULL,0,0)) 253 { 254 TranslateMessage(&msg); 255 DispatchMessage(&msg); 256 } 257 } 258 259 int APIENTRY WinMain(HINSTANCE hInstance, 260 HINSTANCE hPrevInstance, 261 LPSTR lpCmdLine, 262 int nCmdShow) 263 { 264 // TODO: Place code here. 265 g_hInst = hInstance; 266 RegisterWnd("MYWND"); 267 HWND hWnd = CreateWnd("MYWND"); 268 DisplayWnd(hWnd); 269 Message(); 270 271 return 0; 272 }
