当在c#中构建Windows控制台应用程序时,是否有可能写入控制台而不必扩展当前行或去到新行?例如,如果我想显示一个百分比,表示一个流程离完成有多近,我只需要在游标所在的同一行上更新该值,而不必将每个百分比放在新行上。
这可以用“标准”c#控制台应用程序来实现吗?
当在c#中构建Windows控制台应用程序时,是否有可能写入控制台而不必扩展当前行或去到新行?例如,如果我想显示一个百分比,表示一个流程离完成有多近,我只需要在游标所在的同一行上更新该值,而不必将每个百分比放在新行上。
这可以用“标准”c#控制台应用程序来实现吗?
当前回答
我做了一个搜索,看看我写的解决方案是否可以优化速度。我想要的是一个倒数计时器,而不仅仅是更新当前行。 这是我想到的。可能对某人有用
int sleepTime = 5 * 60; // 5 minutes
for (int secondsRemaining = sleepTime; secondsRemaining > 0; secondsRemaining --)
{
double minutesPrecise = secondsRemaining / 60;
double minutesRounded = Math.Round(minutesPrecise, 0);
int seconds = Convert.ToInt32((minutesRounded * 60) - secondsRemaining);
Console.Write($"\rProcess will resume in {minutesRounded}:{String.Format("{0:D2}", -seconds)} ");
Thread.Sleep(1000);
}
Console.WriteLine("");
其他回答
在行首显式地使用Carrage Return (\r),而不是(隐式或显式地)在行尾使用New line (\n),应该得到你想要的结果。例如:
void demoPercentDone() {
for(int i = 0; i < 100; i++) {
System.Console.Write( "\rProcessing {0}%...", i );
System.Threading.Thread.Sleep( 1000 );
}
System.Console.WriteLine();
}
如果要更新一行,但信息太长而不能在一行上显示,则可能需要一些新行。我遇到过这个问题,下面是解决这个问题的一种方法。
public class DumpOutPutInforInSameLine
{
//content show in how many lines
int TotalLine = 0;
//start cursor line
int cursorTop = 0;
// use to set character number show in one line
int OneLineCharNum = 75;
public void DumpInformation(string content)
{
OutPutInSameLine(content);
SetBackSpace();
}
static void backspace(int n)
{
for (var i = 0; i < n; ++i)
Console.Write("\b \b");
}
public void SetBackSpace()
{
if (TotalLine == 0)
{
backspace(OneLineCharNum);
}
else
{
TotalLine--;
while (TotalLine >= 0)
{
backspace(OneLineCharNum);
TotalLine--;
if (TotalLine >= 0)
{
Console.SetCursorPosition(OneLineCharNum, cursorTop + TotalLine);
}
}
}
}
private void OutPutInSameLine(string content)
{
//Console.WriteLine(TotalNum);
cursorTop = Console.CursorTop;
TotalLine = content.Length / OneLineCharNum;
if (content.Length % OneLineCharNum > 0)
{
TotalLine++;
}
if (TotalLine == 0)
{
Console.Write("{0}", content);
return;
}
int i = 0;
while (i < TotalLine)
{
int cNum = i * OneLineCharNum;
if (i < TotalLine - 1)
{
Console.WriteLine("{0}", content.Substring(cNum, OneLineCharNum));
}
else
{
Console.Write("{0}", content.Substring(cNum, content.Length - cNum));
}
i++;
}
}
}
class Program
{
static void Main(string[] args)
{
DumpOutPutInforInSameLine outPutInSameLine = new DumpOutPutInforInSameLine();
outPutInSameLine.DumpInformation("");
outPutInSameLine.DumpInformation("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
outPutInSameLine.DumpInformation("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
outPutInSameLine.DumpInformation("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
//need several lines
outPutInSameLine.DumpInformation("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
outPutInSameLine.DumpInformation("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
outPutInSameLine.DumpInformation("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
outPutInSameLine.DumpInformation("bbbbbbbbbbbbbbbbbbbbbbbbbbb");
}
}
public void Update(string data)
{
Console.Write(string.Format("\r{0}", "".PadLeft(Console.CursorLeft, ' ')));
Console.Write(string.Format("\r{0}", data));
}
灵感来自@E。拉湖解决方案,执行进度条用百分比。
public class ConsoleSpinner
{
private int _counter;
public void Turn(Color color, int max, string prefix = "Completed", string symbol = "■",int position = 0)
{
Console.SetCursorPosition(0, position);
Console.Write($"{prefix} {ComputeSpinner(_counter, max, symbol)}", color);
_counter = _counter == max ? 0 : _counter + 1;
}
public string ComputeSpinner(int nmb, int max, string symbol)
{
var spinner = new StringBuilder();
if (nmb == 0)
return "\r ";
spinner.Append($"[{nmb}%] [");
for (var i = 0; i < max; i++)
{
spinner.Append(i < nmb ? symbol : ".");
}
spinner.Append("]");
return spinner.ToString();
}
}
public static void Main(string[] args)
{
var progressBar= new ConsoleSpinner();
for (int i = 0; i < 1000; i++)
{
progressBar.Turn(Color.Aqua,100);
Thread.Sleep(1000);
}
}
以下是我对s soosh和0xA3的回答的看法。 它可以在更新旋转器的同时用用户消息更新控制台,并且还有一个运行时间指示器。
public class ConsoleSpiner : IDisposable
{
private static readonly string INDICATOR = "/-\\|";
private static readonly string MASK = "\r{0} {1:c} {2}";
int counter;
Timer timer;
string message;
public ConsoleSpiner() {
counter = 0;
timer = new Timer(200);
timer.Elapsed += TimerTick;
}
public void Start() {
timer.Start();
}
public void Stop() {
timer.Stop();
counter = 0;
}
public string Message {
get { return message; }
set { message = value; }
}
private void TimerTick(object sender, ElapsedEventArgs e) {
Turn();
}
private void Turn() {
counter++;
var elapsed = TimeSpan.FromMilliseconds(counter * 200);
Console.Write(MASK, INDICATOR[counter % 4], elapsed, this.Message);
}
public void Dispose() {
Stop();
timer.Elapsed -= TimerTick;
this.timer.Dispose();
}
}
用法是这样的:
class Program
{
static void Main(string[] args)
{
using (var spinner = new ConsoleSpiner())
{
spinner.Start();
spinner.Message = "About to do some heavy staff :-)"
DoWork();
spinner.Message = "Now processing other staff".
OtherWork();
spinner.Stop();
}
Console.WriteLine("COMPLETED!!!!!\nPress any key to exit.");
}
}