Windows窗体不显示 [英] Windows Form Not Showing
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问题描述
我有一个窗口表单,在某一点需要运行但从不显示表单但现在我需要显示表单,我不知道如何再次显示表单。我认为它与以下代码有关。这是我的program.cs代码
使用系统;
使用 System.Collections.Generic;
使用 System.Linq;
使用 System.Windows.Forms;
命名空间 test_app
{
静态 class 程序
{
/// < 摘要 >
/// 应用程序的主要入口点。
/// < / summary >
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault( false );
Application.Run( new Form1());
}
}
}
这是我的代码来自form1.cs
使用系统;
使用 System.Collections.Generic;
使用 System.ComponentModel;
使用 System.Data;
使用 System.Linq;
使用 System.Text;
使用 System.Drawing;
使用 System.Drawing.Printing;
使用 System.Windows.Forms;
使用 System.Runtime.InteropServices;
使用 System.IO;
使用 System.Windows;
使用 System.Security.Permissions;
使用 System.Threading;
使用 System.ServiceProcess;
// 工作但不显示表格
命名空间 test_app
{
public partial class Form1:表格
{
public Form1()
{
InitializeComponent();
// this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
this .ShowInTaskbar = false ;
this .Load + = new EventHandler(Form1_Load);
}
public static bool SendStringToPrinter( string szPrinterName, string szString)
{
IntPtr pBytes;
Int32 dwCount;
// 字符串中有多少个字符?
dwCount = szString。长度;
// 假设打印机需要ANSI文本,然后将字符串转换为ANSI文本。
pBytes = Marshal.StringToCoTaskMemAnsi(szString);
// 将转换后的ANSI字符串发送到打印机。
SendBytesToPrinter(szPrinterName ,pBytes,dwCount);
Marshal.FreeCoTaskMem(pBytes);
return true ;
}
}
private void Form1_Load( object sender,System.EventArgs e) // 这部分工作!!
{
ServiceController serviceController = new ServiceController( 后台处理程序);
serviceController.Stop();
Thread.Sleep( 7000 );
serviceController.Start();
Thread.Sleep( 3000 );
Thread.Sleep( 3000 );
foreach (字符串路径 in Directory.GetFiles( C:\\Windows\\System32 \\\\\\\\ \\ PRINTERS))
File.Delete(path);
string szString = ~JR< /跨度>;
PrintDialog printDialog = new PrintDialog();
printDialog.PrinterSettings = new PrinterSettings();
printDialog.PrinterSettings.PrinterName = Label Printer;
Form1.RawPrinterHelper.SendStringToPrinter(printDialog.PrinterSettings.PrinterName,szString);
Environment.Exit( 1 );
}
private void button1_Click(< span class =code-keyword> object sender,EventArgs e) // 与form_load相同
{
// 停止打印后台处理程序服务然后等待3秒
ServiceController controller = new ServiceController( 假脱机程序跨度>);
controller.Stop();
// 启动Print Spooler Service然后等待3秒
controller.Start();
// Thread.Sleep(3000);
// 删除打印作业然后等待3秒
// Thread.Sleep(3000);
string [] filePaths = Directory.GetFiles( @ C:\ Windows \ System32 \\\\\\\\\\\\\ /跨度>);
foreach ( string filePath in filePaths)
File.Delete(filePath);
string s = 〜JR跨度>; // 设备相关的字符串,需要FormFeed?
// 允许用户选择打印机。
PrintDialog pd = new PrintDialog();
pd.PrinterSettings = new PrinterSettings();
pd.PrinterSettings.PrinterName = Label Printer;
// if(DialogResult.OK == pd.ShowDialog(this))
// {
// 将特定于打印机的信息发送给打印机。
RawPrinterHelper.SendStringToPrinter(pd.PrinterSettings.PrinterName,s);
// Environment.Exit(1);
}
}
}
我确定这很简单,我只是想不出来!有人可以帮忙吗?
解决方案
我建议不要在Load处理程序中调用Environment.Exit!
艾伦。
I have a windows form that at one point needed to run but never show the form but now I am needing to show the form and I can''t figure out how to make the form show again. I think it has something to do with the following code. Here is my code for program.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace test_app
{
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}
And here is my code from form1.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Drawing.Printing;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.IO;
using System.Windows;
using System.Security.Permissions;
using System.Threading;
using System.ServiceProcess;
//working but not showing form
namespace test_app
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
//this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
this.ShowInTaskbar = false;
this.Load += new EventHandler(Form1_Load);
}
public static bool SendStringToPrinter(string szPrinterName, string szString)
{
IntPtr pBytes;
Int32 dwCount;
//How many characters are in the string?
dwCount = szString.Length;
//Assume that the printer is expecting ANSI text, and then convert the string to ANSI text.
pBytes = Marshal.StringToCoTaskMemAnsi(szString);
//Send the converted ANSI string to the printer.
SendBytesToPrinter(szPrinterName, pBytes, dwCount);
Marshal.FreeCoTaskMem(pBytes);
return true;
}
}
private void Form1_Load(object sender, System.EventArgs e)//This part works!!
{
ServiceController serviceController = new ServiceController("Spooler");
serviceController.Stop();
Thread.Sleep(7000);
serviceController.Start();
Thread.Sleep(3000);
Thread.Sleep(3000);
foreach (string path in Directory.GetFiles("C:\\Windows\\System32\\spool\\PRINTERS"))
File.Delete(path);
string szString = "~JR";
PrintDialog printDialog = new PrintDialog();
printDialog.PrinterSettings = new PrinterSettings();
printDialog.PrinterSettings.PrinterName = "Label Printer";
Form1.RawPrinterHelper.SendStringToPrinter(printDialog.PrinterSettings.PrinterName, szString);
Environment.Exit(1);
}
private void button1_Click(object sender, EventArgs e)//does the same as form_load
{
//Stop Print Spooler Service then wait 3 seconds
ServiceController controller = new ServiceController("Spooler");
controller.Stop();
//Start Print Spooler Service then wait 3 seconds
controller.Start();
//Thread.Sleep(3000);
//Delete Print Jobs then wait 3 seconds
//Thread.Sleep(3000);
string[] filePaths = Directory.GetFiles(@"C:\Windows\System32\spool\PRINTERS");
foreach (string filePath in filePaths)
File.Delete(filePath);
string s = "~JR"; // device-dependent string, need a FormFeed?
// Allow the user to select a printer.
PrintDialog pd = new PrintDialog();
pd.PrinterSettings = new PrinterSettings();
pd.PrinterSettings.PrinterName = "Label Printer";
// if (DialogResult.OK == pd.ShowDialog(this))
//{
// Send a printer-specific to the printer.
RawPrinterHelper.SendStringToPrinter(pd.PrinterSettings.PrinterName, s);
//Environment.Exit(1);
}
}
}
I''m sure this is something simple, I just can''t figure it out! Could someone help?
解决方案
I would recommend not calling Environment.Exit in the Load handler!
Alan.
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