英文:
Comparison between string and serial port input is always false
问题
我正在制作一个游戏，在游戏中我通过串口（Arduino）获取骰子输入。由于输入不仅仅是一个数字，而是 "e" + 我想要的数字，我正在尝试在Visual Studio中获取这个数字。
然而，这并不像你期望的那么简单。我正在使用简单的if语句，看看我的代码：
string RolledNumberCode = Program.form1.DicePort.ReadExisting();
if (RolledNumberCode.Contains("e"))
{
MessageBox.Show(RolledNumberCode);
int RolledNumber = 0;
if (RolledNumberCode.Contains("1")) { RolledNumber = 1; }
else if (RolledNumberCode.Contains("2")) { RolledNumber = 2; }
else if (RolledNumberCode.Contains("3")) { RolledNumber = 3; }
else if (RolledNumberCode.Contains("4")) { RolledNumber = 4; }
else if (RolledNumberCode.Contains("5")) { RolledNumber = 5; }
else if (RolledNumberCode.Contains("6")) { RolledNumber = 6; }
dice.RollAnalog(RolledNumber);
}
在这之后，似乎不起作用，我使用消息框进行了测试，C#确实正确读取了RolledNumberCode，例如，一个消息框弹出显示e4。但是当我将RolledNumber放入MessageBox中时，它总是为0。
有人知道我在这里做错了什么吗？我强烈认为我的代码中只是一个简单的错误，但我找不到它 
英文:
I am making a game where I get dice input from the serial port (Arduino). Since the input isn't just simply a number but is "e" + the number I am trying to get the number in Visual Studio.
This, however, doesn't go as simply as you'd expect. I am using simple if statements, see my code:
string RolledNumberCode = Program.form1.DicePort.ReadExisting();
if (RolledNumberCode.Contains("e"))
{
MessageBox.Show(RolledNumberCode);
int RolledNumber = 0;
if (RolledNumberCode.Contains("1")) { RolledNumber = 1; }
else if (RolledNumberCode.Contains("2")) { RolledNumber = 2; }
else if (RolledNumberCode.Contains("3")) { RolledNumber = 3; }
else if (RolledNumberCode.Contains("4")) { RolledNumber = 4; }
else if (RolledNumberCode.Contains("5")) { RolledNumber = 5; }
else if (RolledNumberCode.Contains("6")) { RolledNumber = 6; }
dice.RollAnalog(RolledNumber);
After this didn't seem to work I tested it with messageboxes and the c# does read the RolledNumberCode correctly, for example a messagebox pops up showing e4. But then I put the RolledNumber in a MessageBox, it is always 0.
Does somebody know what I am doing wrong here? I strongly think there is just a simple error in my code but I can't find it
答案1
得分: 1
将代码中的英文部分翻译如下：
"Instead of if else ladder I would suggest, remove e from string i.e "e1" to "1" and assign it to RolledNumber "
建议不使用if else梯形结构，而是从字符串中移除e，即从"e1"改为"1"，然后赋值给RolledNumber 。
string RolledNumberCode = Program.form1.DicePort.ReadExisting();
if (RolledNumberCode.Contains("e"))
{
int RolledNumber = Convert.ToInt32(RolledNumberCode.Replace("e",""));
dice.RollAnalog(RolledNumber);
}
英文:
Instead of if else ladder I would suggest, remove e from string i.e "e1" to "1" and assign it to RolledNumber
string RolledNumberCode = Program.form1.DicePort.ReadExisting();
if (RolledNumberCode.Contains("e"))
{
int RolledNumber = Convert.ToInt32(RolledNumberCode.Replace("e",""));
dice.RollAnalog(RolledNumber);
}
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