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分享关于 RegEnumValue 函数的一点问题，请指教，谢谢！
LONG RegEnumValue(
HKEY hKey, // handle to key to query
DWORD dwIndex, // index of value to query
LPTSTR lpValueName, // address of buffer for value string
LPDWORD lpcbValueName, // address for size of value buffer
LPDWORD lpReserved, // reserved
LPDWORD lpType, // address of buffer for type code
LPBYTE lpData, // address of buffer for value data
LPDWORD lpcbData // address for size of data buffer
);
以上是该函数的原型，其中 lpValueName 是返回键值项数据的项名，但为什么例如“MediaPathUnexpanded”的项名，它只返回其中前面部分，就好像“MediaPathUn”，后面的就不见了，我百思不知其所,特此指教于诸位大虾！
HKEY hKey, // handle to key to query
DWORD dwIndex, // index of value to query
LPTSTR lpValueName, // address of buffer for value string
LPDWORD lpcbValueName, // address for size of value buffer
LPDWORD lpReserved, // reserved
LPDWORD lpType, // address of buffer for type code
LPBYTE lpData, // address of buffer for value data
LPDWORD lpcbData // address for size of data buffer
);
以上是该函数的原型，其中 lpValueName 是返回键值项数据的项名，但为什么例如“MediaPathUnexpanded”的项名，它只返回其中前面部分，就好像“MediaPathUn”，后面的就不见了，我百思不知其所,特此指教于诸位大虾！
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as2001 2004-07-02
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谢谢！！试过，可以的，谢谢！！pomelowu(羽战士)
as2001 2004-07-01
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自己先占一楼！
carbon107 2004-07-01
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LPTSTR lpValueName先用变量存起来,只要存的空间够,应该可以显示出的吧
pomelowu 2004-07-01
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给段例子：
HKEY hKey = NULL;
long lKeyRet = 0;
DWORD dwIndexKey = 0;
char *keyname = NULL;
DWORD dwSubKeys = 0;
DWORD dwMaxSubKeyLen = 0;
DWORD dwValues = 0;
DWORD dwMaxValueNameLen = 0;
DWORD dwMaxValueLen = 0;
// 获取所有的子键
if (ERROR_SUCCESS != RegOpenKeyEx(hRoot, strSubKey,
NULL,
KEY_ALL_ACCESS, &hKey))
return FALSE;
if (ERROR_SUCCESS != RegQueryInfoKey(hKey,
NULL, NULL,
NULL,
&dwSubKeys, // 子键数
&dwMaxSubKeyLen,
NULL,
&dwValues, // 值数
&dwMaxValueNameLen,
&dwMaxValueLen,
NULL,
NULL
))
{
RegCloseKey(hKey);
return FALSE;
}
keyname = new char[dwMaxSubKeyLen+1];
if (NULL == keyname)
return FALSE;
listKeys.SetSize(dwSubKeys);
listKeys.RemoveAll();
do
{
memset(keyname, NULL, dwMaxSubKeyLen);
lKeyRet = RegEnumKey(hKey, dwIndexKey++, keyname, dwMaxSubKeyLen+1);
if (ERROR_SUCCESS == lKeyRet)
{
listKeys.Add(keyname);
}
}while (lKeyRet != ERROR_NO_MORE_ITEMS);
delete []keyname;
keyname = NULL;
RegCloseKey(hKey);
HKEY hKey = NULL;
long lKeyRet = 0;
DWORD dwIndexKey = 0;
char *keyname = NULL;
DWORD dwSubKeys = 0;
DWORD dwMaxSubKeyLen = 0;
DWORD dwValues = 0;
DWORD dwMaxValueNameLen = 0;
DWORD dwMaxValueLen = 0;
// 获取所有的子键
if (ERROR_SUCCESS != RegOpenKeyEx(hRoot, strSubKey,
NULL,
KEY_ALL_ACCESS, &hKey))
return FALSE;
if (ERROR_SUCCESS != RegQueryInfoKey(hKey,
NULL, NULL,
NULL,
&dwSubKeys, // 子键数
&dwMaxSubKeyLen,
NULL,
&dwValues, // 值数
&dwMaxValueNameLen,
&dwMaxValueLen,
NULL,
NULL
))
{
RegCloseKey(hKey);
return FALSE;
}
keyname = new char[dwMaxSubKeyLen+1];
if (NULL == keyname)
return FALSE;
listKeys.SetSize(dwSubKeys);
listKeys.RemoveAll();
do
{
memset(keyname, NULL, dwMaxSubKeyLen);
lKeyRet = RegEnumKey(hKey, dwIndexKey++, keyname, dwMaxSubKeyLen+1);
if (ERROR_SUCCESS == lKeyRet)
{
listKeys.Add(keyname);
}
}while (lKeyRet != ERROR_NO_MORE_ITEMS);
delete []keyname;
keyname = NULL;
RegCloseKey(hKey);
pomelowu 2004-07-01
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void CRegExplorerView::EnumerateValues(HKEY hKey, LPCTSTR cstrKey)
{
static HKEY hLastKey = hKey;
LONG lResult;
DWORD dwIndex = 0;
HKEY hCurKey = hKey;
DWORD dwKeyType;
DWORD dwKeyDataLength, dwKeyNameLen;
LPBYTE pbbinKeyData = NULL;
TCHAR *tcKeyName = NULL;
TCHAR tcDataType[1024] = _T("");
lResult = RegOpenKeyEx(hCurKey, cstrKey, 0, KEY_QUERY_VALUE , &hKey);
if(lResult != ERROR_SUCCESS)
return;
DWORD lNoOfValues = 0;
DWORD lLongestKeyNameLen = 1;
DWORD lLongestDataLen = 1;
lResult = RegQueryInfoKey(hKey, NULL, NULL, NULL, NULL, NULL, NULL, &lNoOfValues, &lLongestKeyNameLen, &lLongestDataLen,NULL, NULL);
if(lResult != ERROR_SUCCESS)
return;
hLastKey = hKey;
lLongestKeyNameLen++;
lLongestDataLen++;
tcKeyName = new TCHAR[lLongestKeyNameLen];
pbbinKeyData = new BYTE[lLongestDataLen];
CString cstrFinalData, cstrTemp;
while(TRUE)
{
memset(pbbinKeyData, 0, lLongestDataLen);
memset(tcKeyName, 0, lLongestKeyNameLen);
dwKeyType = dwKeyDataLength = dwKeyNameLen = 0;
dwKeyNameLen = lLongestKeyNameLen;
dwKeyDataLength = lLongestDataLen;
lResult = RegEnumValue(hKey, dwIndex, tcKeyName, &dwKeyNameLen, NULL, &dwKeyType, pbbinKeyData, &dwKeyDataLength);
if(lResult == ERROR_NO_MORE_ITEMS)
break;
AddRegistryItem(tcKeyName, dwKeyType, pbbinKeyData, dwKeyDataLength, dwIndex);//显示数据于ListView
dwIndex++;
}
RegCloseKey(hKey);
delete tcKeyName;
delete pbbinKeyData;
}
{
static HKEY hLastKey = hKey;
LONG lResult;
DWORD dwIndex = 0;
HKEY hCurKey = hKey;
DWORD dwKeyType;
DWORD dwKeyDataLength, dwKeyNameLen;
LPBYTE pbbinKeyData = NULL;
TCHAR *tcKeyName = NULL;
TCHAR tcDataType[1024] = _T("");
lResult = RegOpenKeyEx(hCurKey, cstrKey, 0, KEY_QUERY_VALUE , &hKey);
if(lResult != ERROR_SUCCESS)
return;
DWORD lNoOfValues = 0;
DWORD lLongestKeyNameLen = 1;
DWORD lLongestDataLen = 1;
lResult = RegQueryInfoKey(hKey, NULL, NULL, NULL, NULL, NULL, NULL, &lNoOfValues, &lLongestKeyNameLen, &lLongestDataLen,NULL, NULL);
if(lResult != ERROR_SUCCESS)
return;
hLastKey = hKey;
lLongestKeyNameLen++;
lLongestDataLen++;
tcKeyName = new TCHAR[lLongestKeyNameLen];
pbbinKeyData = new BYTE[lLongestDataLen];
CString cstrFinalData, cstrTemp;
while(TRUE)
{
memset(pbbinKeyData, 0, lLongestDataLen);
memset(tcKeyName, 0, lLongestKeyNameLen);
dwKeyType = dwKeyDataLength = dwKeyNameLen = 0;
dwKeyNameLen = lLongestKeyNameLen;
dwKeyDataLength = lLongestDataLen;
lResult = RegEnumValue(hKey, dwIndex, tcKeyName, &dwKeyNameLen, NULL, &dwKeyType, pbbinKeyData, &dwKeyDataLength);
if(lResult == ERROR_NO_MORE_ITEMS)
break;
AddRegistryItem(tcKeyName, dwKeyType, pbbinKeyData, dwKeyDataLength, dwIndex);//显示数据于ListView
dwIndex++;
}
RegCloseKey(hKey);
delete tcKeyName;
delete pbbinKeyData;
}
as2001 2004-07-01
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问题还是没有解决，继续学习中～～～～
Zark 2004-07-01
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1. 在你调用此函数前,你必须准备好缓冲区lpValueName.
2. 你必须保证这个缓冲区足够的大,能够容纳下Value Name.
3. 你的问题可能出在没有准备缓冲区这一条上.
2. 你必须保证这个缓冲区足够的大,能够容纳下Value Name.
3. 你的问题可能出在没有准备缓冲区这一条上.
as2001 2004-07-01
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还是不行，可以具体点吗？谢谢！
pomelowu 2004-07-01
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应该不会啊，通过RegQueryInfoKey可以获得value name的最大长度的（参数lpcMaxValueNameLen），RegEnumValue中lpValueName开辟的空间比lpcMaxValueNameLen大就行了啊
