Develop Reference

I want to run the process in background in my .net project

I have a piece of code which requires me to use a process, but i want that to run in background and not open console window.
public uint LaunchProcess(string sIPAddress, string sPort)
{
uint iPid = 0;
try
{
logger.AddLog("LaunchProcess : " + sIPAddress + " " + sPort);
object[] PlugInRunnerInfo = { StaticUtils.GetLocation(AgilentPluginCommonConstants.PlugInRunnerPath) + "\\" + "PlugInRunner.exe" + " " + sIPAddress + " " + sPort, null, null, 0 };
//ManagementClass is a part of Windows Management Intrumentation,namespaces. One of its use is to provides access to manage applications.
//Here this class is used to launch PlugInRunner as detached process.By setting the ManagementClass object's property 'CreateFlags' to value 0x00000008
//we can start the PlugInRunner as detached one.
using (var mgmtObject = new ManagementClass("Win32_Process"))
{
var processStartupInfo = new ManagementClass("Win32_ProcessStartup");
processStartupInfo.Properties["CreateFlags"].Value = 0x00000008;//DETACHED_PROCESS.
var result = mgmtObject.InvokeMethod("Create", PlugInRunnerInfo);
if (result != null)
{
logger.AddLog("Process id " + Convert.ToUInt32(PlugInRunnerInfo[3]));
iPid = Convert.ToUInt32(PlugInRunnerInfo[3]);
}
}
}
catch (Exception ex)
{
logger.AddLog("Exception " + ex.Message);
}
return iPid;
}
Above is my code, can anyone help me run the process in background?

Update programmatically image after Event with KNX.Net

I'm creating a webapp to control some lights in my house. I can't understand why after firing the Event void, the image is not updating; while if i fire it from a button it is actually changing.
I have tried this so far, using KNX.Net libraries
...
public void Event(string address, string state)
{
if (address.Equals(CH03LightOnOffAddressStatus) || address.Equals(CH04LightOnOffAddressStatus))
{
System.Diagnostics.Debug.WriteLine("New Event: device " + address + " has status (" + state + ") --> " + _connection.FromDataPoint("9.001", state));
}
else if (
address.Equals(CH01LightOnOffAddressStatus) ||
address.Equals(CH02LightOnOffAddressStatus)
)
{
var data = string.Empty;
if (state.Length == 1)
{
data = ((byte)state[0]).ToString();
}
else
{
var bytes = new byte[state.Length];
for (var i = 0; i < state.Length; i++)
{
bytes[i] = Convert.ToByte(state[i]);
}
data = state.Aggregate(data, (current, t) => current + t.ToString());
}
System.Diagnostics.Debug.WriteLine("New Event: device " + address + " has status --> " + data);
condition = data;
nowAddress = address;
}
if (condition == "1")
{
Image1.ImageUrl = #"\Res\Call.png";
}
else
{
Image1.ImageUrl = #"\Res\Bomb.png";
}
}
...
While if i fire it like this, the image is changing indeed
...
private void CH01LightOn()
{
_connection.Action(CH01LightOnOffAddress, true);
Thread.Sleep(500);
if (condition == "1")
{
Image1.ImageUrl = #"\Res\Call.png";
}
else
{
Image1.ImageUrl = #"\Res\Bomb.png";
}
}
...
I just need the images to be changing after the event is fired.
Thank you in advance.

This is probably a threading issue. If the Event method is not called on the UI thread, you cannot access your WinForms controls directly, but have to use Control.Invoke.
To try this, replace Image1.ImageUrl = #"\Res\Call.png" by:
if (Image1.InvokeRequired)
{
Image1.Invoke((Action)(() => Image1.ImageUrl = #"\Res\Call.png"));
}
else
{
Image1.ImageUrl = #"\Res\Call.png"
}

How to authenticate using username/password/domain via ManagementScope

Have a utility I wrote that checks (among other things) the last time a set of servers was rebooted. This works great as long as the servers are all within my domain and the user launching the app have rights on the servers. Added a section where the user can specify alternative credentials, in our case specifically to deal with another domain. The credentials I am feeding into have domain admin rights on the destination domain, yet my code is getting an Access Denied (Unauthorized Access) error.
thanks!
private void btnLastReboot_Click(object sender, EventArgs e)
{
ConnectionOptions conOpts = new ConnectionOptions();
if (selectedList.Count > 0)
{
Cursor currentCursor = Cursor.Current;
Cursor.Current = Cursors.WaitCursor;
stripProgress.Visible = true;
stripProgress.Minimum = 0;
stripProgress.Maximum = selectedList.Count();
stripProgress.Step = 1;
stripProgress.Value = 0;
rtfOut.SelectionTabs = new int[] { 100, 200 };
rtfOut.Text = "";
var sq = new SelectQuery("Win32_OperatingSystem");
if (prefs.useCurrentUser == true)
{
// Setting all fields to NULL causes current user info to be used
conOpts.Username = null;
conOpts.Password = null;
conOpts.Authority = null;
}
else
{
conOpts.Username = prefs.userName;
conOpts.Password = prefs.password.ToString();
conOpts.Authority = "ntlmdomain:" + prefs.domain;
}
foreach (ServerList anEntry in selectedList)
{
stripProgress.Value++;
try
{
var mgmtScope = new ManagementScope("\\\\" + anEntry.ServerName + "\\root\\cimv2", conOpts);
mgmtScope.Connect();
var mgmtSearcher = new ManagementObjectSearcher(mgmtScope, sq);
foreach (var item in mgmtSearcher.Get())
{
var lastBoot = item.GetPropertyValue("LastBootUpTime").ToString();
DateTime lboot = ManagementDateTimeConverter.ToDateTime(lastBoot);
rtfOut.Text += anEntry.ServerName + "\t";
if(anEntry.ServerName.Length <= 9)
{
rtfOut.Text += "\t";
}
rtfOut.Text += lboot.ToLongDateString() + " (" + lboot.ToLongTimeString() + ")\r\n";
}
}
catch (Exception ex)
{
if (ex is UnauthorizedAccessException)
{
rtfOut.Text += anEntry.ServerName + "\t <Access Denied>\r\n";
}
else
{
rtfOut.Text += anEntry.ServerName + "\t <not responding>\r\n";
}
}
}
stripProgress.Visible = false;
Cursor.Current = currentCursor;
}
}

Had to sleep on it, but the answer finally hit me in the shower...
I store the password the user provides in a SecureString variable, but the ConnectionOptions' password field expects the value as a clear string. I was able to test this by temporarily hard coding a password in, which then worked. The final solution was to convert the SecureString to a clear string and then assign it to the ConnectionOption.
If anyone is curious, I used this bit to convert the password back:
string password = new System.Net.NetworkCredential(string.Empty, securePassword).Password;

Asp.Net Mvc Delete file issue

I have an issue with Files.
I am doing an image importer so clients put their files on an FTP server and then they can import it in the application.
During the import process I copy the file in the FTP Folder to another folder with File.copy
public List<Visuel> ImportVisuel(int galerieId, string[] images)
{
Galerie targetGalerie = MemoryCache.GetGaleriById(galerieId);
List<FormatImage> listeFormats = MemoryCache.FormatImageToList();
int i = 0;
List<Visuel> visuelAddList = new List<Visuel>();
List<Visuel> visuelUpdateList = new List<Visuel>();
List<Visuel> returnList = new List<Visuel>();
foreach (string item in images)
{
i++;
Progress.ImportProgress[Progress.Guid] = "Image " + i + " sur " + images.Count() + " importées";
string extension = Path.GetExtension(item);
string fileName = Path.GetFileName(item);
string originalPath = HttpContext.Current.Request.PhysicalApplicationPath + "Uploads\\";
string destinationPath = HttpContext.Current.Server.MapPath("~/Images/Catalogue") + "\\";
Visuel importImage = MemoryCache.GetVisuelByFilName(fileName);
bool update = true;
if (importImage == null) { importImage = new Visuel(); update = false; }
Size imageSize = importImage.GetJpegImageSize(originalPath + fileName);
FormatImage format = listeFormats.Where(f => f.width == imageSize.Width && f.height == imageSize.Height).FirstOrDefault();
string saveFileName = Guid.NewGuid() + extension;
File.Copy(originalPath + fileName, destinationPath + saveFileName);
if (format != null)
{
importImage.format = format;
switch (format.key)
{
case "Catalogue":
importImage.fileName = saveFileName;
importImage.originalFileName = fileName;
importImage.dossier = targetGalerie;
importImage.dossier_id = targetGalerie.id;
importImage.filePath = "Images/Catalogue/";
importImage.largeur = imageSize.Width;
importImage.hauteur = imageSize.Height;
importImage.isRoot = true;
if (update == false) { MemoryCache.Add(ref importImage); returnList.Add(importImage); }
if (update == true) visuelUpdateList.Add(importImage);
foreach (FormatImage f in listeFormats)
{
if (f.key.StartsWith("Catalogue_"))
{
string[] keys = f.key.Split('_');
string destinationFileName = saveFileName.Insert(saveFileName.IndexOf('.'), "-" + keys[1].ToString());
string destinationFileNameDeclinaison = destinationPath + destinationFileName;
VisuelResizer declinaison = new VisuelResizer();
declinaison.Save(originalPath + fileName, f.width, f.height, 1000, destinationFileNameDeclinaison);
Visuel visuel = MemoryCache.GetVisuelByFilName(fileName.Insert(fileName.IndexOf('.'), "-" + keys[1].ToString()));
update = true;
if (visuel == null) { visuel = new Visuel(); update = false; }
visuel.parent = importImage;
visuel.filePath = "Images/Catalogue/";
visuel.fileName = destinationFileName;
visuel.originalFileName = string.Empty;
visuel.format = f;
//visuel.dossier = targetGalerie; On s'en fout pour les déclinaisons
visuel.largeur = f.width;
visuel.hauteur = f.height;
if (update == false)
{
visuelAddList.Add(visuel);
}
else
{
visuelUpdateList.Add(visuel);
}
//importImage.declinaisons.Add(visuel);
}
}
break;
}
}
}
MemoryCache.Add(ref visuelAddList);
// FONCTION à implémenter
MemoryCache.Update(ref visuelUpdateList);
return returnList;
}
After some processes on the copy (the original file is no more used)
the client have a pop-up asking him if he wants to delete the original files in the ftp folder.
If he clicks on Ok another method is called on the same controller
and this method use
public void DeleteImageFile(string[] files)
{
for (int i = 0; i < files.Length; i++)
{
File.Delete(HttpContext.Current.Request.PhysicalApplicationPath + files[i].Replace(#"/", #"\"));
}
}
This method works fine and really delete the good files when I use it in other context.
But here I have an error message:
Process can't acces to file ... because it's used by another process.
Someone have an idea?
Thank you.
Here's the screenshot of Process Explorer

There are couple of thing you can do here.
1) If you can repro it, you can use Process Explorer at that moment and see which process is locking the file and if the process is ur process then making sure that you close the file handle after your work is done.
2) Use try/catch around the delete statement and retry after few seconds to see if the file handle was released.
3) If you can do it offline you can put in some queue and do the deletion on it later on.

You solve this by using c# locks. Just embed your code inside a lock statement and your threads will be safe and wait each other to complete processing.

I found the solution:
in my import method, there a call to that method
public void Save(string originalFile, int maxWidth, int maxHeight, int quality, string filePath)
{
Bitmap image = new Bitmap(originalFile);
Save(ref image, maxWidth, maxHeight, quality, filePath);
}
The bitmap maintains the file opened blocking delete.
just added
image.Dispose();
in the methos and it work fine.
Thank you for your help, and thank you for process explorer. Very useful tool

What is different between DCOM Identity “The interactive user” and “This user” if the username is the same (Administrator)?

I’m working on an ASP webpage that uses a Minitab DCOM object. My problem is that this DCOM object stops responding (hangs) if the Identity is set as “This User” under Component Services (DCONCNFG) but if I log into windows with the user that I used under “This User” and set the Identity as “Interactive user” everything works fine.
My question is what is different between DCOM Identity “The interactive user” and “This user” if the username is the same (Administrator)?
Mainly this webpage uses Minitab to generate graphs. Before it hangs it does generate graphs but only 5 or 6 graphs then it stops responding.
Here is the C# code incase you are wondering where it hangs:
using System;
using System.Web;
using System.Web.UI.WebControls;
using Mtb; // Minitab Library (Mtb 16.0 Type Library)
using System.IO;
using System.Data;
using System.Runtime.InteropServices;
using System.Threading;
namespace TRWebApp.TestDetails
{
public partial class TestDetails : System.Web.UI.Page
{
// MiniTab Stuff
Mtb.IApplication g_MtbApp;
Mtb.IProject g_MtbProj;
Mtb.IUserInterface g_MtbUI;
Mtb.IWorksheets g_MtbWkShts;
Mtb.ICommands g_MtbCommands;
Mtb.IOutputs g_MtbOutputs;
Mtb.IGraph g_MtbGraph;
Mtb.IOutputs g_MtbOutputs2;
Mtb.IGraph g_MtbGraph2;
int g_GraphIdx = 1;
int g_Loop = 1;
// Tests Table
enum testsTable { TestIdx, TestSeq, ParamName, LSL, USL, Units };
Tools tools = new Tools();
string g_SessionID = "";
Mtb_DataSetTableAdapters.XBarTableAdapter xbarTA = new Mtb_DataSetTableAdapters.XBarTableAdapter();
protected void Page_Init(object sender, EventArgs e)
{
g_MtbApp = new Application();
g_MtbProj = g_MtbApp.ActiveProject;
g_MtbUI = g_MtbApp.UserInterface;
g_MtbWkShts = g_MtbProj.Worksheets;
g_MtbCommands = g_MtbProj.Commands;
g_MtbUI.DisplayAlerts = false;
g_MtbUI.Interactive = false;
g_MtbUI.UserControl = false;
lblProductDesc.Text = ""; // Start with a clear variable
g_SessionID = HttpContext.Current.Session.SessionID;
string imgFolder = "Images/Mtb/";
string mtbSessionPath = Server.MapPath(ResolveUrl("~/" + imgFolder)) + g_SessionID;
Directory.CreateDirectory(mtbSessionPath);
Array.ForEach(Directory.GetFiles(mtbSessionPath), File.Delete); // Delete all the files from the directory
Session["MtbSessionPath"] = mtbSessionPath; // Store the Session Path so we can later delete it
// Add the two image columns to the grid view
GridView1.AutoGenerateColumns = false;
ImageField imgColumn = new ImageField();
imgColumn.HeaderText = "Scatterplot";
imgColumn.DataImageUrlField = "TestIdx";
imgColumn.DataImageUrlFormatString = "~\\Images\\Mtb\\" + g_SessionID + "\\{0}.GIF";
imgColumn.ControlStyle.CssClass = "MtbImgDetail";
GridView1.Columns.Add(imgColumn);
ImageField img2Column = new ImageField();
img2Column.HeaderText = "Histogram";
img2Column.DataImageUrlField = "TestIdx";
img2Column.DataImageUrlFormatString = "~\\Images\\Mtb\\" + g_SessionID + "\\H{0}.GIF";
img2Column.ControlStyle.CssClass = "MtbImgDetail";
GridView1.Columns.Add(img2Column);
}
protected void Page_Load(object sender, EventArgs e)
{
try
{
lblErrMsg.Text = "";
// Fill dates if they are empty
if (String.IsNullOrEmpty(tbxFromDate.Text))
tbxFromDate.Text = String.Format("{0:MM/01/yy}", DateTime.Today, null, DateTime.Today);
if (String.IsNullOrEmpty(tbxToDate.Text))
tbxToDate.Text = String.Format("{0:MM/dd/yy}", DateTime.Today);
}
catch (Exception ex)
{
lblErrMsg.Text = ex.Message;
}
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowIndex >= 0)
{
// Get the data for the parameter name
DataTable dt = xbarTA.GetXBarData(lbxProduct.SelectedValue, Convert.ToDateTime(tbxFromDate.Text), Convert.ToDateTime(tbxToDate.Text), e.Row.Cells[(int)testsTable.ParamName].Text);
// Pass the data to an object array so we can pass it to minitab
object[] data = new object[dt.Rows.Count];
object[] time = new object[dt.Rows.Count];
int i = 0;
foreach (DataRow dr in dt.Rows)
{
if (tools.IsNumeric(dr["ParamValue"]))
{
data[i] = Convert.ToDouble(dr["ParamValue"]);
time[i] = i;
}
i++;
}
if (dt.Rows.Count > 1) // Do graphs with at least two measurements
{
// Only pass it to minitab if we have numeric data
if (!ReferenceEquals(data[0], null)) // if it is not null it means it has a numeric value
{
g_MtbWkShts.Item(1).Columns.Add().SetData(data);
g_MtbWkShts.Item(1).Columns.Add().SetData(time);
g_MtbWkShts.Item(1).Columns.Item(1).Name = e.Row.Cells[(int)testsTable.ParamName].Text + " (" + e.Row.Cells[(int)testsTable.Units].Text + ")";
g_MtbWkShts.Item(1).Columns.Item(2).Name = "Time";
//// H E R E
////
//// FOLLOWING LINE HANGS AFTER GENERATING 6 GRAPHS WHEN THE IDENTITY "THIS USER" IS SET
////
g_MtbProj.ExecuteCommand("Plot C1*C2;\nSymbol;\nConnect.", g_MtbWkShts.Item(1));
// Convert LSL and USL to Decimal
if (tools.IsNumeric(e.Row.Cells[(int)testsTable.LSL].Text.Trim()) && tools.IsNumeric(e.Row.Cells[(int)testsTable.USL].Text.Trim()))
{
if (Convert.ToDouble(e.Row.Cells[(int)testsTable.LSL].Text) < Convert.ToDouble(e.Row.Cells[(int)testsTable.USL].Text))
{
g_MtbProj.ExecuteCommand("Capa C1 " + dt.Rows.Count.ToString() + ";\nLspec " + e.Row.Cells[(int)testsTable.LSL].Text + ";\nUspec " + e.Row.Cells[(int)testsTable.USL].Text + ";\nPooled;\nAMR;\nUnBiased;\nOBiased;\nToler 6;\nWithin;\nOverall;\nCStat.", g_MtbWkShts.Item(1));
}
else
{
g_MtbProj.ExecuteCommand("Histogram C1;\nBar;\nDistribution;\nNormal.", g_MtbWkShts.Item(1));
}
}
else
{
g_MtbProj.ExecuteCommand("Histogram C1;\nBar;\nDistribution;\nNormal.", g_MtbWkShts.Item(1));
}
try
{
g_MtbOutputs = g_MtbCommands.Item(g_GraphIdx).Outputs;
g_GraphIdx++;
g_MtbOutputs2 = g_MtbCommands.Item(g_GraphIdx).Outputs;
g_GraphIdx++;
string graphPath = "";
if (g_MtbOutputs.Count > 0)
{
g_MtbGraph = g_MtbOutputs.Item(1).Graph;
graphPath = Server.MapPath(ResolveUrl("~/Images/Mtb/")) + g_SessionID + Path.DirectorySeparatorChar + e.Row.Cells[(int)testsTable.TestIdx].Text + ".gif";
g_MtbGraph.SaveAs(graphPath, true, MtbGraphFileTypes.GFGIF, 600, 400, 96);
}
if (g_MtbOutputs2.Count > 0)
{
g_MtbGraph2 = g_MtbOutputs2.Item(1).Graph;
graphPath = Server.MapPath(ResolveUrl("~/Images/Mtb/")) + g_SessionID + Path.DirectorySeparatorChar + "H" + e.Row.Cells[(int)testsTable.TestIdx].Text + ".gif";
g_MtbGraph2.SaveAs(graphPath, true, MtbGraphFileTypes.GFGIF, 600, 400, 96);
}
}
catch (Exception ex)
{
lblErrMsg.Text = "Test Idx: " + e.Row.Cells[(int)testsTable.TestIdx].Text + " seems to have problems.<BR />Error: " + ex.Message;
}
g_MtbWkShts.Item(1).Columns.Delete(); // Delete all the columns (This line of code is needed otherwise the Mtb.exe will still running on the server side task manager
}
else
{
// Copy the No numeric image as a graph
File.Copy(Server.MapPath("~\\Images\\Mtb\\NaN.gif"), Server.MapPath("~\\Images\\Mtb\\" + g_SessionID + "\\" + e.Row.Cells[(int)testsTable.TestIdx].Text + ".gif"));
File.Copy(Server.MapPath("~\\Images\\Mtb\\NaN.gif"), Server.MapPath("~\\Images\\Mtb\\" + g_SessionID + "\\H" + e.Row.Cells[(int)testsTable.TestIdx].Text + ".gif"));
}
}
}
}
protected void GridView1_Unload(object sender, EventArgs e)
{
// All these lines of code are needed otherwise the Mtb.exe will not be close on the task manager (server side)
GC.Collect();
GC.WaitForPendingFinalizers();
if (g_MtbGraph != null)
Marshal.ReleaseComObject(g_MtbGraph); g_MtbGraph = null;
if (g_MtbOutputs != null)
Marshal.ReleaseComObject(g_MtbOutputs); g_MtbOutputs = null;
if (g_MtbGraph2 != null)
Marshal.ReleaseComObject(g_MtbGraph2); g_MtbGraph2 = null;
if (g_MtbOutputs2 != null)
Marshal.ReleaseComObject(g_MtbOutputs2); g_MtbOutputs2 = null;
if (g_MtbCommands != null)
Marshal.ReleaseComObject(g_MtbCommands); g_MtbCommands = null;
if (g_MtbWkShts != null)
Marshal.ReleaseComObject(g_MtbWkShts); g_MtbWkShts = null;
if (g_MtbUI != null)
Marshal.ReleaseComObject(g_MtbUI); g_MtbUI = null;
if (g_MtbProj != null)
Marshal.ReleaseComObject(g_MtbProj); g_MtbProj = null;
if (g_MtbApp != null)
{
g_MtbApp.Quit();
Marshal.ReleaseComObject(g_MtbApp); g_MtbApp = null;
}
}
}
}
I'm using:
Windows Server 2008 R2 Standard (SP 1)
IIS 7.5.7600.16385
Framework 4.0.30319
Visual Studio 2010 Version 10.0.30319.1
Minitab 16.1.0
Thank you,
Pablo

Just a guess, based on something that happened to me ages ago:
For some reason, Minitab is displaying a modal error dialog of some kind. When you configure DCOM to launch as some user (not the interactive user), the process gets its own "windows station" which is not actually visible to you as the logged in user. So there is a dialog popped up somewhere invisible, waiting for input forever, hence the hang. Why the dialog is displaying is a different matter, likely a permissions issue. Sometimes, certain parts of the registry are available or not available in different activation contexts, for example.

Thanks Jlew for the link. It helped me to solve the problem by changing a register value from “Shared Section=1024,20480,768” to “Shared Section=1024,20480,2304” (3 times bigger) on this register key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\SubSystems\Windows
This value specifies a memory heap size when the user is not logged on. I guess it was not enough to handle all the MiniTab graphs.
Pablo