尝试创建listbox c ++时，获取IDC_LISTBOX_EXAMPLE是未定义的错误

Question

我想创建这样一个简单的多选允许列表框，为此，我做了以下几点：BTW我正在使用visual studio 2013 ultimate

#include <iostream>
#include "Windows.h"
#include "Strsafe.h"
#include "Afxres.h"


typedef struct 
{ 
    TCHAR achName[MAX_PATH]; 
    TCHAR achPosition[12]; 
    int nGamesPlayed; 
    int nGoalsScored; 
} Player; 

Player Roster[] = 
{ 
    {TEXT("Haas, Jonathan"), TEXT("Midfield"), 18, 4 }, 
    {TEXT("Pai, Jyothi"), TEXT("Forward"), 36, 12 }, 
    {TEXT("Hanif, Kerim"), TEXT("Back"), 26, 0 }, 
    {TEXT("Anderberg, Michael"), TEXT("Back"), 24, 2 }, 
    {TEXT("Jelitto, Jacek"), TEXT("Midfield"), 26, 3 }, 
    {TEXT("Raposo, Rui"), TEXT("Back"), 24, 3}, 
    {TEXT("Joseph, Brad"), TEXT("Forward"), 13, 3 }, 
    {TEXT("Bouchard, Thomas"), TEXT("Forward"), 28, 5 }, 
    {TEXT("Salmre, Ivo "), TEXT("Midfield"), 27, 7 }, 
    {TEXT("Camp, David"), TEXT("Midfield"), 22, 3 }, 
    {TEXT("Kohl, Franz"), TEXT("Goalkeeper"), 17, 0 }, 
}; 


INT_PTR CALLBACK ListBoxExampleProc(HWND hDlg, UINT message, 
        WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_INITDIALOG:
        {
            // Add items to list. 
            HWND hwndList = GetDlgItem(hDlg, IDC_LISTBOX_EXAMPLE);  
            for (int i = 0; i < ARRAYSIZE(Roster); i++) 
            { 
                int pos = (int)SendMessage(hwndList, LB_ADDSTRING, 0, 
                    (LPARAM) Roster[i].achName); 
                // Set the array index of the player as item data.
                // This enables us to retrieve the item from the array
                // even after the items are sorted by the list box.
                SendMessage(hwndList, LB_SETITEMDATA, pos, (LPARAM) i); 
            } 
            // Set input focus to the list box.
            SetFocus(hwndList); 
            return TRUE;               
        } 

    case WM_COMMAND:
        switch (LOWORD(wParam))
        {
        case IDOK:
        case IDCANCEL:
            EndDialog(hDlg, LOWORD(wParam));
            return TRUE;

        case IDC_LISTBOX_EXAMPLE:
            {
                switch (HIWORD(wParam)) 
                { 
                case LBN_SELCHANGE:
                    {
                        HWND hwndList = GetDlgItem(hDlg, IDC_LISTBOX_EXAMPLE); 

                        // Get selected index.
                        int lbItem = (int)SendMessage(hwndList, LB_GETCURSEL, 0, 0); 

                        // Get item data.
                        int i = (int)SendMessage(hwndList, LB_GETITEMDATA, lbItem, 0);

                        // Do something with the data from Roster[i]
                        TCHAR buff[MAX_PATH];
                        StringCbPrintf (buff, ARRAYSIZE(buff),  
                            TEXT("Position: %s\nGames played: %d\nGoals: %d"), 
                            Roster[i].achPosition, Roster[i].nGamesPlayed, 
                            Roster[i].nGoalsScored);

                        SetDlgItemText(hDlg, IDC_STATISTICS, buff); 
                        return TRUE; 
                    } 
                }
            }
            return TRUE;
        }
    }
    return FALSE;
}

Altough我已经包含了我需要的所有内容，我收到了以下错误：

Error:identifer "IDC_LISTBOX_EXAMPLE" is undefined.

为什么我会收到这样的错误？有人帮我吗？

修改

我没有使用MFC模板，我必须这样做吗？

Answer 1

好的，所以除了对话程序之外什么都没有。好。 档案 - ＆gt;新... - ＆gt;项目： 那么好 - ＆gt;下一个。您需要创建基于对话框的应用程序。为此，创建空应用程序： 然后单击“完成”。

现在你有空项目。您需要添加对话框资源。 右键单击项目 - ＆gt;添加 - ＆gt;资源。然后是对话 - ＆gt;新： 你将有空对话框。右键单击它们 - ＆gt;属性。记住ID的值（在我的例子中是IDD_DIALOG1）： 然后你需要添加列表框控件。转到ToolBox窗口（View - ＆gt; Toolbox，Ctrl + Alt + X），选择ListBox并拖放到对话框： 好。然后，您需要知道列表框的ID（与对话框相同：右键单击列表框控件 - > gt;属性 - ＆gt; ID）。在我的情况下，它是IDC_LIST2。 对于您的示例，您需要以相同的方式添加静态文本控件（与列表框相同：工具箱 - ＆gt;静态文本 - ＆gt;拖放到对话框窗体）。为此静态控件提供另一个ID（右键单击 - ＆gt;属性 - ＆gt; Id - ＆gt;更改为IDC_STATISTICS）：

你需要在你的对话中做的一切：）

现在 - 代码。将新的cpp文件添加到项目中：

#include <Windows.h>
#include <tchar.h>
#include <strsafe.h>
#include "resource.h"

INT_PTR CALLBACK ListBoxExampleProc(HWND hDlg, UINT message, 
        WPARAM wParam, LPARAM lParam);

int CALLBACK _tWinMain(
  _In_  HINSTANCE hInstance,
  _In_  HINSTANCE hPrevInstance,
  _In_  LPTSTR lpCmdLine,
  _In_  int nCmdShow)
{
    ::DialogBox(hInstance, MAKEINTRESOURCE(IDD_DIALOG1), NULL, ListBoxExampleProc);
    return 0;
}

typedef struct 
{ 
    TCHAR achName[MAX_PATH]; 
    TCHAR achPosition[12]; 
    int nGamesPlayed; 
    int nGoalsScored; 
} Player; 

Player Roster[] = 
{ 
    {TEXT("Haas, Jonathan"), TEXT("Midfield"), 18, 4 }, 
    {TEXT("Pai, Jyothi"), TEXT("Forward"), 36, 12 }, 
    {TEXT("Hanif, Kerim"), TEXT("Back"), 26, 0 }, 
    {TEXT("Anderberg, Michael"), TEXT("Back"), 24, 2 }, 
    {TEXT("Jelitto, Jacek"), TEXT("Midfield"), 26, 3 }, 
    {TEXT("Raposo, Rui"), TEXT("Back"), 24, 3}, 
    {TEXT("Joseph, Brad"), TEXT("Forward"), 13, 3 }, 
    {TEXT("Bouchard, Thomas"), TEXT("Forward"), 28, 5 }, 
    {TEXT("Salmre, Ivo "), TEXT("Midfield"), 27, 7 }, 
    {TEXT("Camp, David"), TEXT("Midfield"), 22, 3 }, 
    {TEXT("Kohl, Franz"), TEXT("Goalkeeper"), 17, 0 }, 
}; 


INT_PTR CALLBACK ListBoxExampleProc(HWND hDlg, UINT message, 
        WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_INITDIALOG:
        {
            // Add items to list. 
            HWND hwndList = GetDlgItem(hDlg, IDC_LIST2);  
            for (int i = 0; i < ARRAYSIZE(Roster); i++) 
            { 
                int pos = (int)SendMessage(hwndList, LB_ADDSTRING, 0, 
                    (LPARAM) Roster[i].achName); 
                // Set the array index of the player as item data.
                // This enables us to retrieve the item from the array
                // even after the items are sorted by the list box.
                SendMessage(hwndList, LB_SETITEMDATA, pos, (LPARAM) i); 
            } 
            // Set input focus to the list box.
            SetFocus(hwndList); 
            return TRUE;               
        } 

    case WM_COMMAND:
        switch (LOWORD(wParam))
        {
        case IDOK:
        case IDCANCEL:
            EndDialog(hDlg, LOWORD(wParam));
            return TRUE;

        case IDC_LIST2:
            {
                switch (HIWORD(wParam)) 
                { 
                case LBN_SELCHANGE:
                    {
                        HWND hwndList = GetDlgItem(hDlg, IDC_LIST2); 

                        // Get selected index.
                        int lbItem = (int)SendMessage(hwndList, LB_GETCURSEL, 0, 0); 

                        // Get item data.
                        int i = (int)SendMessage(hwndList, LB_GETITEMDATA, lbItem, 0);

                        // Do something with the data from Roster[i]
                        TCHAR buff[MAX_PATH];
                        StringCbPrintf (buff, ARRAYSIZE(buff),  
                            TEXT("Position: %s\nGames played: %d\nGoals: %d"), 
                            Roster[i].achPosition, Roster[i].nGamesPlayed, 
                            Roster[i].nGoalsScored);

                        SetDlgItemText(hDlg, IDC_STATISTICS, buff); 
                        return TRUE; 
                    } 
                }
            }
            return TRUE;
        }
    }
    return FALSE;
}

编译并运行！并记住 - 从不使用WInAPI（或MFC，无论如何）来编写UI。 使用Qt ！

你的应用程序的scrren：