UpdateData(TRUE); if (m_user == _T("xiaoli") && m_pwd == _T("041104")) { MessageBox(_T("登录成功！")); CDialogEx::OnOK; }MessageBox内容不弹出来

根据您提供的代码，可能是因为在调用 `CDialogEx::OnOK();` 时，缺少了函数调用的括号，应该写成 `CDialogEx::OnOK();`，同时还需要注意，`CDialogEx::OnOK();` 应该在 `MessageBox` 弹出框之后调用。

因此，您可以尝试如下代码：

UpdateData(TRUE);
if (m_user == _T("xiaoli") && m_pwd == _T("041104")) {
    MessageBox(_T("登录成功！"));
    CDialogEx::OnOK();
}

另外，如果问题仍然存在，还需要检查对话框资源的设置和代码逻辑是否正确。

相关问题

void CMyImageView::OnBianyuan() { // TODO: 在此添加命令处理程序代码 CMyImageDoc* pDoc = GetDocument();//获取文档指针 ASSERT_VALID(pDoc); suanzi dlginputyuzhi;//定义阈值对话框类对象 dlginputyuzhi.DoModal();//弹出对话框 UpdateData(TRUE); if (pDoc->m_pDib == NULL) { AfxMessageBox("Error!"); return; } int mcols = pDoc->m_pDib->m_nCols; int mrows = pDoc->m_pDib->m_nRows; unsigned char* m_pData = NULL; m_pData = pDoc->m_pDib->pImgData; unsigned char* m_pDataOldPos = m_pData; unsigned char* a; int* b = NULL; int irows, jcols; int max = 0; int min = 255; vector<int>v; for (irows = 0; irows < mrows; irows++) { for (jcols = 0; jcols < mcols; jcols++) { int j = 0; int p = 0, q = 0; m_pData += irows * mcols + jcols; j += irows * mcols + jcols; if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) { p = 4 * (*m_pData) - *(m_pData + 1) - *(m_pData - 1) - *(m_pData - mcols) - *(m_pData + mcols); if (p > dlginputyuzhi.suanzi_1) { v.push_back(0); } else { v.push_back(255); } } m_pData = m_pDataOldPos; } } int aq = 0; for (irows = 0; irows < mrows; irows++) { for (jcols = 0; jcols < mcols; jcols++) { int j = 0; int p = 0, q = 0; m_pData += irows * mcols + jcols; j += irows * mcols + jcols; if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) { *m_pData = v[aq]; aq++; } m_pData = m_pDataOldPos; } } for (irows = 0; irows < mrows; irows++) { for (jcols = 0; jcols < mcols; jcols++) { int j = 0; int p = 0, q = 0; m_pData += irows * mcols + jcols; j += irows * mcols + jcols; if (irows>0&&irows<mrows-1&&jcols>0&&jcols<mcols-1) { if (*m_pData==0) { if (*(m_pData + 1) == 0 || *(m_pData - 1) == 0 || *(m_pData - mcols) == 0 || *(m_pData + mcols) == 0) { } else { *m_pData = 255; } } } m_pData = m_pDataOldPos; } } pDoc->UpdateAllViews(NULL); }仿照此代码，将其中的sobel算子改成Robert算子

void CMyImageView::OnBianyuan() {
// TODO: 在此添加命令处理程序代码
CMyImageDoc* pDoc = GetDocument();//获取文档指针
ASSERT_VALID(pDoc);
suanzi dlginputyuzhi;//定义阈值对话框类对象
dlginputyuzhi.DoModal();//弹出对话框
UpdateData(TRUE);

if (pDoc->m_pDib == NULL) {
AfxMessageBox("Error!");
return;
}

int mcols = pDoc->m_pDib->m_nCols;
int mrows = pDoc->m_pDib->m_nRows;
unsigned char* m_pData = NULL;
m_pData = pDoc->m_pDib->pImgData;
unsigned char* m_pDataOldPos = m_pData;
unsigned char* a;
int* b = NULL;
int irows, jcols;
int max = 0;
int min = 255;

vector<int>v;

for (irows = 0; irows < mrows; irows++) {
for (jcols = 0; jcols < mcols; jcols++) {
int j = 0;
int p = 0, q = 0;
m_pData += irows * mcols + jcols;
j += irows * mcols + jcols;
if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) {
// Robert算子
p = abs(*m_pData - *(m_pData + mcols + 1)) + abs(*(m_pData + 1) - *(m_pData + mcols));
if (dlginputyuzhi.suanzi_1 != 0 && p > dlginputyuzhi.suanzi_1) {
v.push_back(0);
}
else {
v.push_back(255);
}
}
m_pData = m_pDataOldPos;
}
}

int aq = 0;
for (irows = 0; irows < mrows; irows++) {
for (jcols = 0; jcols < mcols; jcols++) {
int j = 0;
int p = 0, q = 0;
m_pData += irows * mcols + jcols;
j += irows * mcols + jcols;
if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) {
*m_pData = v[aq];
aq++;
}
m_pData = m_pDataOldPos;
}
}

for (irows = 0; irows < mrows; irows++) {
for (jcols = 0; jcols < mcols; jcols++) {
int j = 0;
int p = 0, q = 0;
m_pData += irows * mcols + jcols;
j += irows * mcols + jcols;
if (irows > 0 && irows < mrows - 1 && jcols > 0 && jcols < mcols - 1) {
if (*m_pData == 0) {
if (*(m_pData + 1) == 0 || *(m_pData - 1) == 0 || *(m_pData - mcols) == 0 || *(m_pData + mcols) == 0) {
}
else {
*m_pData = 255;
}
}
}
m_pData = m_pDataOldPos;
}
}

pDoc->UpdateAllViews(NULL);
}

用C++,创建MFC，用prewitt算子锐化，仿照下面代码void CMyImageView::OnSobelsuanzi() { // TODO: 在此添加命令处理程序代码 CMyImageDoc* pDoc = GetDocument();//获取文档指针 ASSERT_VALID(pDoc); Prewittsuanzi dlginputyuzhi;//定义阈值对话框类对象 dlginputyuzhi.DoModal();//弹出对话框 UpdateData(TRUE); if (pDoc->m_pDib == NULL) { AfxMessageBox("Error!"); return; } int mcols = pDoc->m_pDib->m_nCols; int mrows = pDoc->m_pDib->m_nRows; unsigned char* m_pData = NULL; m_pData = pDoc->m_pDib->pImgData; unsigned char* m_pDataOldPos = m_pData; unsigned char* a; int* b = NULL; int irows, jcols; int max = 0; int min = 255; vector<int>v; for (irows = 0; irows < mrows; irows++) { for (jcols = 0; jcols < mcols; jcols++) { int j = 0; int p = 0, q = 0; m_pData += irows * mcols + jcols; j += irows * mcols + jcols; if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) { p = (m_pData + mcols+1) + 2( * (m_pData + mcols )) + (m_pData + mcols - 1) - 2( * (m_pData - mcols)) - (m_pData - mcols - 1) - (m_pData - mcols + 1); q = 2( * (m_pData + 1)) + (m_pData + mcols + 1) + (m_pData - mcols + 1) - 2( * (m_pData - 1)) - (m_pData + mcols - 1) - (m_pData - mcols - 1); p = abs(p); q = abs(q); if (p > dlginputyuzhi.xyuzhi && q > dlginputyuzhi.yyuzhi) { v.push_back(0); } else { v.push_back(255); } } m_pData = m_pDataOldPos; } } int aq = 0; for (irows = 0; irows < mrows; irows++) { for (jcols = 0; jcols < mcols; jcols++) { int j = 0; int p = 0, q = 0; m_pData += irows * mcols + jcols; j += irows * mcols + jcols; if (j > mcols && (j + 1) % mcols != 0 && j < (mrows * (mcols - 1))) { m_pData = v[aq]; aq++; } m_pData = m_pDataOldPos; } } pDoc->UpdateAllViews(NULL); }，给出相应程序

好的，以下是用C++创建MFC应用程序，用prewitt算子锐化的示例代码，供您参考：

首先，您需要创建一个MFC应用程序，选择MFC应用程序向导，并按照向导提示进行设置和创建。创建完成后，在资源视图中添加一个对话框资源，用于显示阈值对话框。

然后，在对话框类的.h文件中添加以下代码，用于声明事件处理函数：

afx_msg void OnPrewittSuanzi();

在.cpp文件中添加以下代码，用于实现事件处理函数：

void CMyImageView::OnPrewittSuanzi()
{
    CMyImageDoc* pDoc = GetDocument();  // 获取文档指针
    ASSERT_VALID(pDoc);

    CPrewittDlg dlgInputYuzhi;  // 定义阈值对话框类对象
    dlgInputYuzhi.DoModal();  // 弹出对话框
    UpdateData(TRUE);

    if (pDoc->m_pDib == NULL) {
        AfxMessageBox("Error!");
        return;
    }

    int mCols = pDoc->m_pDib->m_nCols;
    int mRows = pDoc->m_pDib->m_nRows;
    unsigned char* m_pData = NULL;
    m_pData = pDoc->m_pDib->pImgData;
    unsigned char* m_pDataOldPos = m_pData;
    unsigned char* a;
    int* b = NULL;
    int iRows, jCols;
    int max = 0;
    int min = 255;
    vector<int> v;

    for (iRows = 0; iRows < mRows; iRows++) {
        for (jCols = 0; jCols < mCols; jCols++) {
            int j = 0;
            int p = 0, q = 0;
            m_pData += iRows * mCols + jCols;
            j += iRows * mCols + jCols;
            if (j > mCols && (j + 1) % mCols != 0 && j < (mRows * (mCols - 1))) {
                p = (m_pData + mCols + 1) + 2 * (*(m_pData + mCols)) + (m_pData + mCols - 1) - 2 * (*(m_pData - mCols)) - (m_pData - mCols - 1) - (m_pData - mCols + 1);
                q = 2 * (*(m_pData + 1)) + (m_pData + mCols + 1) + (m_pData - mCols + 1) - 2 * (*(m_pData - 1)) - (m_pData + mCols - 1) - (m_pData - mCols - 1);
                p = abs(p);
                q = abs(q);
                if (p > dlgInputYuzhi.xyuzhi && q > dlgInputYuzhi.yyuzhi) {
                    v.push_back(0);
                }
                else {
                    v.push_back(255);
                }
            }
            m_pData = m_pDataOldPos;
        }
    }

    int aq = 0;
    for (iRows = 0; iRows < mRows; iRows++) {
        for (jCols = 0; jCols < mCols; jCols++) {
            int j = 0;
            int p = 0, q = 0;
            m_pData += iRows * mCols + jCols;
            j += iRows * mCols + jCols;
            if (j > mCols && (j + 1) % mCols != 0 && j < (mRows * (mCols - 1))) {
                m_pData = v[aq];
                aq++;
            }
            m_pData = m_pDataOldPos;
        }
    }

    pDoc->UpdateAllViews(NULL);
}

其中，CPrewittDlg是阈值对话框类，xyuzhi和yyuzhi是阈值控件的值。

最后，您需要在视图类的.h文件中添加以下代码，用于声明事件处理函数：

afx_msg void OnPrewittSuanzi();

在.cpp文件中添加以下代码，用于响应事件：

BEGIN_MESSAGE_MAP(CMyImageView, CScrollView)
    // 其他消息映射
    ON_COMMAND(ID_PREWITT_SUANZI, &CMyImageView::OnPrewittSuanzi)
END_MESSAGE_MAP()

在资源视图中，您需要添加一个菜单项，用于触发prewitt算子的事件处理函数，代码如下：

<MenuItem
    Id="ID_PREWITT_SUANZI"
    Type="Button"
    Text="Prewitt算子"
    Tooltip="执行Prewitt算子锐化"
    BitmapResourceId="IDB_PREWITT"
    />

至此，您就可以编译和运行程序，并进行测试。如果有问题，可以通过调试来查找和解决。

希望这些信息能对您有所帮助。