我知道这是一个非常基本的问题,但有时你会失去基本概念:) 试过Goggling,但也没有足够的支持。
我正在使用我们设备所有者的预定义库。他们的声明如下:
unsigned char FamilySerialNum[0][8]
此变量以十六进制格式获取设备的序列号。现在我在Qt中使用这个库在QLineEdit中显示序列号。为此,我需要将其转换为QString。
尝试使用QString :: UTF8,strcpy(),sprintf()等但获取垃圾数据。
所以任何人都可以建议我一些方法来完成它。
答案 0 :(得分:7)
QString getStringFromUnsignedChar(unsigned char *str)
{
QString s;
QString result = "";
int rev = strlen(str);
// Print String in Reverse order....
for ( int i = 0; i<rev; i++)
{
s = QString("%1").arg(str[i],0,16);
if(s == "0"){
s="00";
}
result.append(s);
}
return result;
}
答案 1 :(得分:7)
User1550798的答案非常接近,但不能正常工作(它产生的某些输出已损坏),因为它只将值“0”转换为零填充的2字符输出(即:“00”)。相反,任何单位数的十六进制值都应该用零填充(即:“3” - >“03”)。
请尝试以下方法:
QString getStringFromUnsignedChar( unsigned char *str ){
QString result = "";
int lengthOfString = strlen( reinterpret_cast<const char*>(str) );
// print string in reverse order
QString s;
for( int i = 0; i < lengthOfString; i++ ){
s = QString( "%1" ).arg( str[i], 0, 16 );
// account for single-digit hex values (always must serialize as two digits)
if( s.length() == 1 )
result.append( "0" );
result.append( s );
}
return result;
}
答案 2 :(得分:0)
int lengthOfString = strlen(reinterpret_cast(str)); // bug,当试图得到像“00889966”这样的长度时
QString getStringFromUnsignedChar( unsigned char *str, const int len ){
QString result = "";
int lengthOfString = len );
// print string in reverse order
QString s;
for( int i = 0; i < lengthOfString; i++ ){
s = QString( "%1" ).arg( str[i], 0, 16 );
// account for single-digit hex values (always must serialize as two digits)
if( s.length() == 1 )
result.append( "0" );
result.append( s );
}
return result;
}
答案 3 :(得分:-1)
从unsigned char *到QString:
public static async Task Run(string myQueueItem, TraceWriter log)
{
log.Info($"C# ServiceBus queue trigger function processed message: {myQueueItem}");
var manager = new Manager();
RegisterMessage message = manager.ConvertMessage(myQueueItem);
await manager.AddToHub(log, message.MacAddress);
log.Info("fin du run");
}
public class Manager {
string EndpointUrl = "endpoint";
string PrimaryKey = "key";
string connectionString = "connectionString";
RegistryManager registryManager;
DocumentClient client;
public Manager() {
registryManager = RegistryManager.CreateFromConnectionString(connectionString);
client = new DocumentClient(new Uri(EndpointUrl), PrimaryKey);
}
public async Task AddToHub(TraceWriter log, string macAddress) {
string deviceId = this.GenerateUniqueDevice(macAddress);
var device = new Device(deviceId);
try {
await registryManager.AddDeviceAsync(device);
}
catch(Exception e) {
log.Info($"{e.Message}");
}
}
public RegisterMessage ConvertMessage(string queueItem) {
return JsonConvert.DeserializeObject<RegisterMessage>(queueItem);
}
private string GenerateUniqueDevice(string macAddress)
{
...
}
}
从QString到unsigned char *:
unsigned char *str_uchar;
QString str = QString::fromUtf8((char*)str_uchar);