我正在阅读使用Process启动并读取stdError,stdOutout并使用stdInput发送命令的java应用程序的输出。以下是相关代码:
int mem = Properties.Settings.Default.mem_max;
string locale = Properties.Settings.Default.location;
Process bukkit_jva = new Process();
bukkit_jva.StartInfo.FileName = "java";
//bukkit_jva.StartInfo.Arguments = "-Xmx" + mem + "M -Xms" + mem + "M -jar " + locale + "bukkit.jar";
bukkit_jva.StartInfo.Arguments = "-Xmx512M -Xms512M -jar C:\\bukkit\\bukkit.jar";
bukkit_jva.StartInfo.UseShellExecute = false;
bukkit_jva.StartInfo.CreateNoWindow = true;
bukkit_jva.StartInfo.RedirectStandardError = true;
bukkit_jva.StartInfo.RedirectStandardOutput = true;
bukkit_jva.StartInfo.RedirectStandardInput = true;
bukkit_jva.Start();
//start reading output
SetText(bukkit_jva.StandardOutput.ReadLine());
SetText(bukkit_jva.StandardOutput.ReadLine());
SetText(bukkit_jva.StandardOutput.ReadLine());
SetText(bukkit_jva.StandardOutput.ReadLine());
StreamReader err = bukkit_jva.StandardError;
StreamReader output = bukkit_jva.StandardOutput;
StreamWriter writer = bukkit_jva.StandardInput;
SetText(err.Peek().ToString());
while (false == false)
{
if (vars.input != null)
{
writer.WriteLine(vars.input);
vars.input = null;
}
SetText(output.ReadLine() + err.ReadLine());
}
}
SetText()
将该行添加到行列表中。
我的问题是,即使没有输入,java应用程序有时会返回一个字符串,所以我总是需要检查一个新行。但如果我需要发送命令,并且没有新的输出,它将不会发送。
我在readline上尝试了不同的If语句,但它只会返回前几行然后才会停止。
基本上,如果没有可以读取的新行,它似乎会暂停循环。
我怎样才能设置不同的读/写循环或让循环取消暂停?
谢谢, 亚当
答案 0 :(得分:0)
试试这个:
static void Main(string[] args)
{
ProcessStartInfo psi = new ProcessStartInfo("echoApp.exe");
psi.RedirectStandardInput = true;
psi.RedirectStandardOutput = true;
psi.RedirectStandardError = true;
psi.UseShellExecute = false;
Process echoApp = new Process();
echoApp.ErrorDataReceived += new DataReceivedEventHandler(echoApp_ErrorDataReceived);
echoApp.OutputDataReceived += new DataReceivedEventHandler(echoApp_OutputDataReceived);
echoApp.StartInfo = psi;
echoApp.Start();
echoApp.BeginOutputReadLine();
echoApp.BeginErrorReadLine();
echoApp.StandardInput.AutoFlush = true;
string str = "";
while (str != "end")
{
str = Console.ReadLine();
echoApp.StandardInput.WriteLine(str);
}
echoApp.CancelOutputRead();
echoApp.CancelErrorRead();
echoApp.Close();
}
static void echoApp_OutputDataReceived(object sender, DataReceivedEventArgs e)
{
Console.WriteLine("stdout: {0}", e.Data);
}
static void echoApp_ErrorDataReceived(object sender, DataReceivedEventArgs e)
{
Console.WriteLine("stderr: {0}", e.Data);
}
和小echoApp ......
//echoApp
static void Main(string[] args)
{
string str="";
while (str != "end")
{
str = Console.ReadLine();
Console.WriteLine(str);
}
}
答案 1 :(得分:0)
请注意,如果您尝试在CancelOutputRead()和CancelErrorRead()之后访问输出,您可能会发现偶尔会丢失一些文本。我发现刷新仅在显式调用Close()之后发生。处置(使用using语句)没有帮助。
调用命令处理器(CMD.EXE)时很可能会出现此症状,因为它没有显式刷新自身。因此,除非先显式调用Close(),否则请注意不要尝试访问输出(从事件处理程序中写入)。