例外：System.Windows.Forms.dll中的“System.InvalidOperationException”
我不知道问题是什么。
这是我的代码：
namespace TimeClock
{
public partial class Form1 : Form
{
String Code;
String Name;
String InOut;
String allTextIn;
String allTextOut;
Boolean Joshua = false;
int JoshuaInt = 1;
Boolean Alec = false;
int AlecInt = 3;
Boolean Kyle = false;
int KyleInt = 5;
Boolean Jeffrey = false;
int JeffreyInt = 7;
Boolean Carl = false;
int CarlInt = 9;
Boolean Angela = false;
int AngelaInt = 11;
Boolean Kendra = false;
int KendraInt = 13;
Boolean Susan = false;
int SusanInt = 15;
Boolean Kory = false;
int KoryInt = 17;
Boolean Jeanine = false;
int JeanineInt = 19;
Boolean Daniel = false;
int DanielInt = 21;
Boolean Steven = false;
int StevenInt = 23;
Boolean Jacob = false;
int JacobInt = 25;
Boolean Mario = false;
int MarioInt = 27;
int Index;
String csvPath = "C:/Users/Public/TimeClockData.csv";
StringBuilder Header = new StringBuilder();
StringBuilder csvData = new StringBuilder();
private static SpeechSynthesizer synth = new SpeechSynthesizer();
Thread saveData;
Thread clock;
Thread location;
public Form1()
{
InitializeComponent();
FormBorderStyle = FormBorderStyle.None;
WindowState = FormWindowState.Maximized;
TopMost = true;
Header.AppendLine("Timestamp, Name");
File.AppendAllText(csvPath, Header.ToString());
textBox1.Font = new Font("Arial", 30, FontStyle.Bold);
clock = new Thread(new ThreadStart(Clock));
clock.Start();
location = new Thread(new ThreadStart(GetPugsleyLocation));
location.Start();
}
private void Clock()
{
DateTime timeStamp = DateTime.Now;
textBox2.Text = timeStamp.ToString();
}
private void GetPugsleyLocation()
{
Ping ping = new Ping();
string ip = "";
IPAddress address = IPAddress.Parse(ip);
PingReply pong = ping.Send(address);
if (pong.Status == IPStatus.Success)
{
textBox3.Text = "Pugsley is here now";
}
else
{
textBox3.Text = "Pugsley is not here right now";
}
}
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Escape)
{
FormBorderStyle = FormBorderStyle.Sizable;
WindowState = FormWindowState.Normal;
TopMost = false;
}
}
public static void SpeakNow(string message)
{
synth.SelectVoiceByHints(VoiceGender.Male);
synth.Speak(message);
synth.Rate = -2;
}
public void saveDataThread()
{
DateTime timeStamp = DateTime.Now;
csvData.AppendLine(timeStamp + "," + Name + "," + InOut);
File.AppendAllText(csvPath, csvData.ToString());
csvData.Clear();
InOut = null;
}
private void Number_Click(object sender, EventArgs e)
{
Button button = (Button)sender;
Code = Code + button.Text;
textBox1.Text = Code;
}
private void Enter_Click(object sender, EventArgs e)
{
//in or out
Button button = (Button)sender;
Name = "";
var list = new List<string>();
list.Add("107");
list.Add("104");
list.Add("115");
list.Add("131");
list.Add("113");
list.Add("112");
list.Add("126");
list.Add("117");
list.Add("130");
list.Add("116");
list.Add("108");
list.Add("133");
list.Add("122");
list.Add("106");
if (list.Contains(Code))
{
if (Code == "107")
{
Name = "Joshua";
Index = JoshuaInt;
if (Joshua == false)
{
InOut = "In";
Joshua = true;
goto done;
}
if (Joshua == true)
{
InOut = "Out";
Joshua = false;
goto done;
}
}
if (Code == "104")
{
Name = "Alec";
Index = AlecInt;
if (Alec == false)
{
InOut = "In";
Alec = true;
goto done;
}
if (Alec == true)
{
InOut = "Out";
Alec = false;
goto done;
}
}
if (Code == "115")
{
Name = "Kyle";
Index = KyleInt;
if (Kyle == false)
{
InOut = "In";
Kyle = true;
goto done;
}
if (Kyle == true)
{
InOut = "Out";
Kyle = false;
goto done;
}
}
if (Code == "131")
{
Name = "Jeffrey";
Index = JeffreyInt;
if (Jeffrey == false)
{
InOut = "In";
Jeffrey = true;
goto done;
}
if (Jeffrey == true)
{
InOut = "Out";
Jeffrey = false;
goto done;
}
}
if (Code == "113")
{
Name = "Carl";
Index = CarlInt;
if (Carl == false)
{
InOut = "In";
Carl = true;
goto done;
}
if (Carl == true)
{
InOut = "Out";
Carl = false;
goto done;
}
}
if (Code == "112")
{
Name = "Angela";
Index = AngelaInt;
if (Angela == false)
{
InOut = "In";
Angela = true;
goto done;
}
if (Angela == true)
{
InOut = "Out";
Angela = false;
goto done;
}
}
if (Code == "126")
{
Name = "Kendra";
Index = KendraInt;
if (Kendra == false)
{
InOut = "In";
Kendra = true;
goto done;
}
if (Kendra == true)
{
InOut = "Out";
Kendra = false;
goto done;
}
}
if (Code == "117")
{
Name = "Susan";
Index = SusanInt;
if (Susan == false)
{
InOut = "In";
Susan = true;
goto done;
}
if (Susan == true)
{
InOut = "Out";
Susan = false;
goto done;
}
}
if (Code == "130")
{
Name = "Kory";
Index = KoryInt;
if (Kory == false)
{
InOut = "In";
Kory = true;
goto done;
}
if (Kory == true)
{
InOut = "Out";
Kory = false;
goto done;
}
}
if (Code == "116")
{
Name = "Jeanine";
Index = JeanineInt;
if (Jeanine == false)
{
InOut = "In";
Jeanine = true;
goto done;
}
if (Jeanine == true)
{
InOut = "Out";
Jeanine = false;
goto done;
}
}
if (Code == "108")
{
Name = "Daniel";
Index = DanielInt;
if (Daniel == false)
{
InOut = "In";
Daniel = true;
goto done;
}
if (Daniel == true)
{
InOut = "Out";
Daniel = false;
goto done;
}
}
if (Code == "133")
{
Name = "Steven";
Index = StevenInt;
if (Steven == false)
{
InOut = "In";
Steven = true;
goto done;
}
if (Steven == true)
{
InOut = "Out";
Steven = false;
goto done;
}
}
if (Code == "122")
{
Name = "Jacob";
Index = JacobInt;
if (Jacob == false)
{
InOut = "In";
Jacob = true;
goto done;
}
if (Jacob == true)
{
InOut = "Out";
Jacob = false;
goto done;
}
}
if (Code == "106")
{
Name = "Mario";
Index = MarioInt;
if (Mario == false)
{
InOut = "In";
Mario = true;
goto done;
}
if (Mario == true)
{
InOut = "Out";
Mario = false;
goto done;
}
}
}
else
{
goto clear;
}
done:
InOut = button.Text;
saveData = new Thread(new ThreadStart(saveDataThread));
saveData.Start();
String[] textIn = System.IO.File.ReadAllLines(@"C:\Users\Public\textIn.txt");
String[] textOut = System.IO.File.ReadAllLines(@"C:\Users\Public\textOut.txt");
allTextIn = textIn[Index];
allTextOut = textOut[Index];
if (InOut == "In")
{
if (allTextIn != "/")
{
SpeakNow(allTextIn);
}
else
{
SpeakNow("Hello" + Name);
}
}
else
{
if (allTextOut != "/")
{
SpeakNow(allTextOut);
}
else
{
SpeakNow("Goodbye" + Name);
}
}
clear:
Code = null;
textBox1.Text = Code;
}
private void Backspace_Click(object sender, EventArgs e)
{
//Backspace
if (Code.Length >= 1)
{
Code = Code.Substring(0, Code.Length - 1);
textBox1.Text = Code;
}
}
private void Clear_Click(object sender, EventArgs e)
{
//Clear
Code = null;
textBox1.Text = Code;
}
}
}
运行几秒钟，然后崩溃。我对C＃和visual studio很新。就像我说的，我不知道问题是什么。我读到它可能是由更改UI的线程引起的，但另一个版本与更改UI的线程一起工作，所以我不知道。请帮帮我！
1 个答案:
答案 0 :(得分：4)
您无法直接从线程访问UI，就像您正在做的那样。
首先在您的控件上调用Invoke：
private void Clock()
{
textBox2.Invoke(new Action(() => textBox2.Text = DateTime.Now.ToString()));
}
private void GetPugsleyLocation()
{
...
...
textBox3.Invoke(new Action(() =>
textBox3.Text = "Pugsley is " + (pong.Status == IPStatus.Success ? "" : "not") + " here now"));
}
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