运行批处理文件&暂停后读取最后一行输出
本文关键字：一行 输出 最后 批处理文件 暂停 读取 运行 | 更新日期: 2023-09-27 18:14:42
我有一个web应用程序，它有一个充满批处理文件的页面，用户可以运行，查看输出，并发送输入。我的问题发生在进程遇到导致它暂停的东西时，比如暂停，或者需要用户按Y或N才能继续的问题。在这个问题中，我们将使用暂停。
这是我的批处理文件:
pause
当在windows中运行时，我得到屏幕上显示的输出"Press any key to continue…"，我按enter键，它退出。但是当我的应用程序运行这个批处理文件时，我没有得到任何输出，但我知道它在等待什么，所以我按enter，然后我才看到输出"press any key to continue…"。
我在控制台应用程序中创建了一个简化版本的代码，同样的事情发生了，我得到一个空白屏幕，我按下回车键，然后我看到"按任意键继续…"
在我被要求按下键之前，我知道我是如何得到这行输出的吗?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.IO;
namespace BatchCaller
{
class Program
{
static void Main(string[] args)
{
ProcessStartInfo psi = new ProcessStartInfo()
{
FileName = @"C:'Projects'BatchCaller'BatchCaller'Test2.bat",
RedirectStandardOutput = true,
RedirectStandardInput = true,
UseShellExecute = false,
CreateNoWindow = true
};
Process proc = new Process();
proc.StartInfo = psi;
proc.OutputDataReceived += new DataReceivedEventHandler(proc_OutputDataReceived);
proc.Start();
proc.BeginOutputReadLine();
// Problem is not here, ignore this, just my temporary input method.
// Problem still occurs when these two lines are removed.
string inputText = Console.ReadLine();
proc.StandardInput.WriteLine(inputText);
proc.WaitForExit();
}
static void proc_OutputDataReceived(object sender, DataReceivedEventArgs e)
{
// This method doesnt get called for output: "Press any key to continue..."
// Why?
if (e.Data != null)
Console.WriteLine(e.Data);
}
}
}
刚刚检查过，我注意到暂停不会返回到下一行文本，直到你按下键。这可能就是它没有显示的原因，因为您的代码正在寻找一行返回。与其使用ReadLine()，不如试试是否有一个可以在打印时显示所有字符的方法。(^这应该能解决你的问题，让你更实时地看到里面发生了什么)
我还以为你需要把你的:
string inputText = Console.ReadLine();
proc.StandardInput.WriteLine(inputText);
到OutputDataReceived处理程序。
然后在主程序中调用proc.WaitForExit()，如果运气好(我还没有测试过)，应该会发生以下情况:
- 进程的输出缓冲区被刷新
- 你的OutputDataReceived处理程序被执行
- 控制台。用进程的stdout 写
- 控制台。读取并发送输入到进程的stdin
- proc退出
我意识到它没有读取最后一行，因为data received事件只有在有一整行输出后才被触发，但是当它暂停或询问问题时，光标仍然在同一行上。一个新的线程可以不断地检查输出流，这是解决这个小问题的方法。
我也设法解决了我的整个问题，所以现在当我运行一个脚本时，我得到的就像一个命令提示符窗口。
这是一个非常基本的工作原理总结:
我启动一个运行批处理文件的新进程。与此同时，我启动了一个新线程，该线程不断循环，要求进程提供更多输出，并将输出存储在队列中。我的. net计时器不断检查文本队列，并将其输出到ajax面板中。我使用文本框和ajax将文本输入到流程输入和ajax面板中。我还需要大量的javascript，我不得不使用会话变量，使其顺利运行。
<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true"
CodeBehind="Scripts.aspx.cs" Inherits="MITool.Scripts" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<script type="text/javascript" language="javascript">
var script = '';
function ShowScriptModal() {
$('#overlay').css({ width: $(document).width(), height: $(document).height(), 'display': 'block' }).animate({ opacity: 0.85 }, 0, function () { $('#scriptModal').show(); });
}
function ScriptInputKeypress(e) {
if (e.keyCode == 13) {
ScriptInput();
}
}
function ScriptInput() {
var txtInput = document.getElementById("txtInput");
var input = txtInput.value;
var hiddenInput = document.getElementById("hiddenInput");
if (input == '')
return;
hiddenInput.value = input;
txtInput.value = '';
}
function CheckForNewOutput() {
var outputUpdatePanel = document.getElementById("OutputUpdatePanel");
var pageScript = outputUpdatePanel.innerHTML;
if (script != pageScript) {
script = pageScript;
ScrollToBottom();
}
setTimeout("CheckForNewOutput()", 100);
}
function ScrollToBottom() {
$('#OutputPanel').scrollTop($('#OutputUpdatePanel').height());
}
</script>
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" EnablePartialRendering="true" LoadScriptsBeforeUI="true" />
<div id="scriptModal">
<div id="ScriptInputOutput">
<asp:Panel ID="OutputPanel" runat="server" Width="700" Height="250" ScrollBars="Vertical"
Style="margin: 10px auto; border: 1px solid #CCC; padding: 5px;" ClientIDMode="Static">
<controls:ScriptOutput ID="ScriptOutputControl" runat="server" />
</asp:Panel>
<asp:Panel ID="InputPanel" runat="server" DefaultButton="btnScriptInput" >
<asp:TextBox ID="txtInput" runat="server" ClientIDMode="Static" onkeypress="ScriptInputKeypress(event)" />
<asp:HiddenField ID="hiddenInput" runat="server" ClientIDMode="Static" />
<asp:Button ID="btnScriptInput" runat="server" Text="Script Input" ClientIDMode="Static" OnClick="btnScriptInput_Click" style="display:none" />
<asp:Button ID="btnExit" runat="server" CssClass="floatRight" Text="Exit" OnClick="btnExit_Click" />
</asp:Panel>
</div>
</div>
<asp:Literal ID="litScript" runat="server" />
<ul id="breadcrumb">
<li><a href="/dashboard.aspx">Main page</a> ></li>
<li class="current">Scripts</li>
</ul>
<div class="content">
<h2>
<asp:Label ID="lblHeader" runat="server" Text="Scripts" /></h2>
<div class="clear">
</div>
<div class="table-content">
<asp:Label ID="lblMessage" runat="server" CssClass="redMessage" />
<asp:Repeater ID="rptScripts" runat="server" OnItemCommand="rptScripts_ItemCommand">
<HeaderTemplate>
<table class="table" cellpadding="0" cellspacing="0">
<tr>
<th>
ID
</th>
<th>
Name
</th>
<th>
Location
</th>
<th>
</th>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td>
<%# Eval("ScriptId") %>
</td>
<td>
<%# Eval("Name") %>
</td>
<td>
<%# Eval("Path") %>
</td>
<td>
<asp:LinkButton ID="btnRunScript" runat="server" Text="Run" CommandName="Run" CommandArgument='<%# Eval("ScriptId") %>' />
</td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
<div>
</div>
</div>
</div>
<script type="text/javascript" language="javascript">
CheckForNewOutput();
</script>
</asp:Content>
// ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== ======//
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using MITool.Data.ScriptManager;
using System.Diagnostics;
using System.IO;
using System.Web.Security;
using System.Web.Services;
using System.Collections.Concurrent;
using System.Threading;
namespace MITool
{
public partial class Scripts : System.Web.UI.Page
{
ConcurrentQueue<char> ScriptOutputQueue
{
get
{
return (ConcurrentQueue<char>)Session["ScriptOutputQueue"];
}
set
{
Session["ScriptOutputQueue"] = value;
}
}
Process CurrentProcess
{
get
{
return (Process)Session["CurrentProcess"];
}
set
{
Session["CurrentProcess"] = value;
}
}
bool ScriptRunning
{
get
{
if (CurrentProcess == null)
return false;
if (!CurrentProcess.HasExited || !CurrentProcess.StandardOutput.EndOfStream)
return true;
return false;
}
}
bool OutputProcessing
{
get
{
if (ScriptOutputQueue != null && ScriptOutputQueue.Count != 0)
return true;
return false;
}
}
Thread OutputThread;
void Reset()
{
ScriptOutputControl.SetTimerEnabled(false);
ScriptOutputControl.ClearOutputText();
if (CurrentProcess != null && !CurrentProcess.HasExited)
CurrentProcess.Kill();
if (OutputThread != null && OutputThread.IsAlive)
OutputThread.Abort();
ScriptOutputQueue = new ConcurrentQueue<char>();
litScript.Text = string.Empty;
txtInput.Text = string.Empty;
}
void Page_Load(object sender, EventArgs e)
{
if (IsPostBack) return;
Reset();
FormsIdentity id = (FormsIdentity)HttpContext.Current.User.Identity;
string role = id.Ticket.UserData;
ScriptData data = new ScriptData();
List<Script> scripts = data.GetScriptsByRole(role);
rptScripts.DataSource = scripts;
rptScripts.DataBind();
}
protected void rptScripts_ItemCommand(object source, RepeaterCommandEventArgs e)
{
switch (e.CommandName)
{
case "Run": StartScript(Int32.Parse(e.CommandArgument.ToString()));
break;
}
}
void StartScript(int id)
{
if (ScriptRunning || OutputProcessing)
return;
Reset();
ScriptData data = new ScriptData();
History history = new History()
{
UserName = HttpContext.Current.User.Identity.Name,
BatchFileId = id,
DateRun = DateTime.Now
};
data.CreateHistory(history);
Script script = data.GetScript(id);
ProcessStartInfo psi = new ProcessStartInfo()
{
FileName = script.Path,
RedirectStandardOutput = true,
RedirectStandardInput = true,
UseShellExecute = false,
CreateNoWindow = true
};
CurrentProcess = new Process();
CurrentProcess.StartInfo = psi;
OutputThread = new Thread(Output);
CurrentProcess.Start();
OutputThread.Start();
ScriptOutputControl.SetTimerEnabled(true);
litScript.Text = "<script type='"text/javascript'" language='"javascript'">ShowScriptModal();</script>";
SetFocus("txtInput");
}
void Output()
{
while (ScriptRunning)
{
var x = CurrentProcess.StandardOutput.Read();
if (x != -1)
ScriptOutputQueue.Enqueue((char)x);
}
}
public void btnScriptInput_Click(object sender, EventArgs e)
{
string input = hiddenInput.Value.ToString();
ScriptOutputControl.Input(input);
foreach (char x in input.ToArray())
{
if (CurrentProcess != null && !CurrentProcess.HasExited)
{
CurrentProcess.StandardInput.Write(x);
}
Thread.Sleep(1);
}
}
protected void btnExit_Click(object sender, EventArgs e)
{
Reset();
}
}
}
// ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== ======//
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="ScriptOutput.ascx.cs"
Inherits="MITool.Controls.ScriptOutput" %>
<asp:Label ID="lblStats" runat="server" Style="color: Red" />
<br />
<asp:UpdatePanel ID="OutputUpdatePanel" runat="server" ClientIDMode="Static">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="UpdateTimer" EventName="Tick" />
<asp:AsyncPostBackTrigger ControlID="btnScriptInput" EventName="Click" />
</Triggers>
<ContentTemplate>
<asp:Literal ID="litOutput" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
<asp:Timer ID="UpdateTimer" Interval="100" runat="server" OnTick="UpdateTimer_Tick" Enabled="false" />
// ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== ======//
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections.Concurrent;
using System.Diagnostics;
namespace MITool.Controls
{
public partial class ScriptOutput : System.Web.UI.UserControl
{
string Output
{
get
{
if (Session["Output"] != null)
return Session["Output"].ToString();
return string.Empty;
}
set
{
Session["Output"] = value;
}
}
ConcurrentQueue<char> ScriptOutputQueue
{
get
{
return (ConcurrentQueue<char>)Session["ScriptOutputQueue"];
}
set
{
Session["ScriptOutputQueue"] = value;
}
}
Process CurrentProcess
{
get
{
return (Process)Session["CurrentProcess"];
}
set
{
Session["CurrentProcess"] = value;
}
}
bool ScriptRunning
{
get
{
if (CurrentProcess == null)
return false;
if (!CurrentProcess.HasExited || CurrentProcess.StandardOutput.Peek() != -1)
return true;
return false;
}
}
bool OutputProcessing
{
get
{
if (ScriptOutputQueue != null && ScriptOutputQueue.Count != 0)
return true;
return false;
}
}
public void SetTimerEnabled(bool enabled)
{
UpdateTimer.Enabled = enabled;
}
public void ClearOutputText()
{
Output = string.Empty;
litOutput.Text = Output;
}
protected void UpdateTimer_Tick(object sender, EventArgs e)
{
ProcessOutput();
if (!ScriptRunning && !OutputProcessing)
{
UpdateTimer.Enabled = false;
Output += "<br />// SCRIPT END //<br />";
litOutput.Text = Output;
}
}
public void Input(string s)
{
Output += "<br />// " + s + "<br />";
}
void ProcessOutput()
{
string s = string.Empty;
while (ScriptOutputQueue != null && ScriptOutputQueue.Any())
{
char x;
if (ScriptOutputQueue.TryDequeue(out x))
{
s += x;
}
}
if (s != string.Empty)
{
s = Server.HtmlEncode(s);
s = s.Replace("'r'n", "<br />");
Output += s;
}
litOutput.Text = Output;
}
}
}