Custom Editor for TabPages in PropertyGrid - C# Discussion Boards

Re: Where Did Microsoft.CSharp Go?

Roger Wright28-Oct-11 4:38

Roger Wright

28-Oct-11 4:38

VS2010 Professional is what it says, but it's the Academic license. Surely Microsoft isn't cheating students! Wink | ;)

Will Rogers never met me.

Re: Where Did Microsoft.CSharp Go?

PIEBALDconsult28-Oct-11 2:58

PIEBALDconsult

28-Oct-11 2:58

I don't even know where it came from or what it's good for. I dereference it.

A bit of help with process.getprocesses

CCodeNewbie27-Oct-11 8:37

CCodeNewbie

27-Oct-11 8:37

Greeting Gurus,

I have been battling for a while with getting some of the properties of running processes and was hoping for a little assistance.

If I build

Process[] processlist = Process.GetProcesses();

foreach(Process p in processlist)
    {
    Console.WriteLine("Process: {0} ID: {1}", p.ProcessName, p.Id);
    }
    Console.ReadLine();

then I get a list of all processes, but if I try

Process[] processlist = Process.GetProcesses();

foreach(Process p in processlist)
    {
    Console.WriteLine("P: {0} ID: {1} FN: {2} ST: {3}", p.ProcessName, p.Id, p.MainModule.FileName, p.StartTime);
    }
    Console.ReadLine();

I get a Win32Exception unhandled error when the enumeration hits the "System" process PID 4. The error is:-

System.ComponentModel.Win32Exception was unhandled
Message="Unable to enumerate the process modules."
Source="System"
ErrorCode=-2147467259
NativeErrorCode=-2147467259

but I can't find any references as to what to do about it.

I would like to keep it in the list of processes if possible, i.e. not just skip it in order to continue the enumeration.

Could someone advise please?

Re: A bit of help with process.getprocesses

Wayne Gaylard27-Oct-11 9:01

Wayne Gaylard

27-Oct-11 9:01

You need to filter out the "System" and "Idle" processes, as you won't have permission to access their modulenames. Try something like this:-

Process[] processlist = Process.GetProcesses();

            foreach (Process p in processlist)
            {
                if (p.ProcessName == "System" || p.ProcessName == "Idle")
                {
                    textBox1.Text += string.Format("P: {0} ID: {1}\n", p.ProcessName, p.Id);
                }
                else
                {
                    textBox1.Text += string.Format("P: {0} ID: {1} FN: {2} ST: {3}\n", p.ProcessName, p.Id, p.MainModule.FileName, p.StartTime);
                }
            }

When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman

Re: A bit of help with process.getprocesses

CCodeNewbie27-Oct-11 10:16

CCodeNewbie

27-Oct-11 10:16

Hi Wayne,

Thanks for that. Interesting though that if I use WMI as a "proxy" running...

ManagementObjectSearcher searcher = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_Process");

                foreach (ManagementObject queryObj in searcher.Get())
                {
                    string[] argList = new string[] { string.Empty, string.Empty };
                    int returnVal = Convert.ToInt32(queryObj.InvokeMethod("GetOwner", argList));
                    if (returnVal == 0)
                    {
                        string owner = argList[1] + "\\" + argList[0];
                        Console.WriteLine("Name: {0} Owner: {1}", queryObj["Name"], owner);
                    }
                }

It tells me "Name: System Owner: NT AUTHORITY\SYSTEM" and then goes on to list a whole bunch of other NT AUTHORITY\SYSTEM processes. Interesting too that "Idle" doesn't show up in the list.

What are your thoughts?

Re: A bit of help with process.getprocesses

Mark Salsbery27-Oct-11 9:04

Mark Salsbery

27-Oct-11 9:04

I would guess that accessing the Process.MainModule property for that process is throwing the exception, something that should be checked for in your code (accessing that property can throw three possible exceptions).

Mark Salsbery
Java | [Coffee]

How to simulate in C#, a VB6 Activex EXE Standalone application which exposes a com visible object .

SuperMiQi27-Oct-11 7:38

SuperMiQi

27-Oct-11 7:38

Hello everyone,

Do you know how to simulate in C#, a VB6 Activex EXE Standalone application which exposes a com visible object (IDispatch wrapper class) already instanced in the 'activex exe like' c# application? The clients accessing it via creatobject / getobject will always get a reference on this object.

This does not seem to be so straight forward as I experimented in vb.net. Is it related to .net interop ?

If I understand well, the best way will be to expose a .NET Remoting object (application life time) then creating a COM interop class library which will be used like a tunnel between the two communication solutions. Is it the only solution ?

Any inputs you could share for this are really welcome ?

Thank you so much in advance.

Custom Editor for TabPages in PropertyGrid

Bernhard Hiller27-Oct-11 2:57

Bernhard Hiller

27-Oct-11 2:57

A PropertyGrid is a nice component fpr editing properties. When it comes to collections, there is the problem that an extra editor is opened, and that extra editor lacks a Closed event.
An article here on CodeProject (PropertyGrid Collection Events[^]) shows how to create a custom editor.
On StackOverflow, I found how to inject a Custom UI Editor (http://stackoverflow.com/questions/849202/how-do-i-inject-a-custom-uitypeeditor-for-all-properties-of-a-closed-source-type[^]).
And there is an editor for TabPages in Syste.Windows.Forms.Design - but that cannot be accessed for inheriting from. I found the code of that editor (http://reflector.webtropy.com/default.aspx/DotNET/DotNET/8@0/untmp/whidbey/REDBITS/ndp/fx/src/Designer/WinForms/System/WinForms/Design/tabpagecollectioneditor@cs/1/tabpagecollectioneditor@cs[^]) and added a closed event as shown in the first link.
Now when I do

object editor0 = System.ComponentModel.TypeDescriptor.GetEditor(typeof(TabControl.TabPageCollection), typeof(System.Drawing.Design.UITypeEditor));
System.ComponentModel.TypeDescriptor.AddAttributes(typeof(TabControl.TabPageCollection),
    new System.ComponentModel.EditorAttribute(typeof(MyTabPageCollectionEditor), typeof(System.Drawing.Design.UITypeEditor)));
object editor1 = System.ComponentModel.TypeDescriptor.GetEditor(typeof(TabControl.TabPageCollection), typeof(System.Drawing.Design.UITypeEditor));

editor0 is a System.ComponentModel.Design.CollectionEditor, editor1 is a MyTabPageCollectionEditor, exactly as expected.
But when I set

propertyGrid.SelectedObject = _TabControl;

my editor is not used for the TabPages property.
Is there a step I missed?

Re: Custom Editor for TabPages in PropertyGrid

Bernhard Hiller27-Oct-11 21:34

Bernhard Hiller

27-Oct-11 21:34

Meanwhile I found a hack, not the real solution I want.
I created my own TabControl, and replaced the TabPages property, such that my own TabPages property will be linked to my editor:

public class MyTabControl : TabControl
{
    public MyTabControl() : base() { }

    [Editor(typeof(MyTabPageCollectionEditor), typeof(System.Drawing.Design.UITypeEditor))]
    public new TabPageCollection TabPages
        {
        get { return base.TabPages; }
    }
}

But that means that I'd have to replace all TabControls with MyTabControl...
I'd really prefer a solution like the one described at StackOverflow.
Perhaps you can provide some further ideas.

Remove Enum prefix from tlb

liqnit27-Oct-11 0:29

liqnit

27-Oct-11 0:29

Hi all
When creating COM dll from C# i get TLB file.
All enums in the file get a prefix of the enum name
is therea way to remove the prefix?

//C# code
public enum OPTIONS
{
Zoom = -1,
FitWindow,
FitWidth,
FitHeight,
Actual
}

//TLB 
OPTIONS
{
OPTIONS_Zoom = -1,
OPTIONS_FitWindow = 0,
OPTIONS_FitWidth = 1,
OPTIONS_FitHeight = 2,
OPTIONS_Actual = 3
};

Have a nice Day

Re: Remove Enum prefix from tlb

Pete O'Hanlon27-Oct-11 1:25

Pete O'Hanlon

27-Oct-11 1:25

There is, but you're not going to be keen on how much work it is. Anyway, if you want to do this you need to follow the steps in this[^] blog.

Forgive your enemies - it messes with their heads

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

Re: Remove Enum prefix from tlb

liqnit27-Oct-11 2:40

liqnit

27-Oct-11 2:40

Thanks - i red this before
I was hoping for an easier way... Cry | :((

Have a nice Day

Re: Remove Enum prefix from tlb

Pete O'Hanlon27-Oct-11 3:10

Pete O'Hanlon

27-Oct-11 3:10

liqnit wrote:
I was hoping for an easier way...

Nope. Sorry.

Forgive your enemies - it messes with their heads

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

Re: Remove Enum prefix from tlb

Dave Kreskowiak27-Oct-11 3:48

Dave Kreskowiak

27-Oct-11 3:48

I can confirm that that procedure is as easy as it gets.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Re: Remove Enum prefix from tlb

liqnit29-Oct-11 21:05

liqnit

29-Oct-11 21:05

HI ALL
After trying all weekend i still get an error when trying to run the IDL to tlb using the commnad line .
from this article - http://blogs.artinsoft.net/mrojas/archive/2010/05/17/interop-remove-prefix-from-c-enums-for-com.aspx[^]

SQL

Save the modified .idl file as ClassLibrary1.dll and run a command like:

midl ClassLibrary1.idl /tlb ClassLibrary1_new.tlb

Shouls i save the modified idl as dll?
is this command line ok ?
has anyone worked with it?
thanks

Have a nice Day

modified 30-Oct-11 3:31am.

Updating an access database table using C#

Theresho26-Oct-11 23:47

Theresho

26-Oct-11 23:47

Im a java developer, new in C#. Im developing a program using C# that saves records of consultations made at a cancer specialised clinic. The user selects a vaccine name, patient, etc. name from records retrived from database and has to get respective ids and use them to update the consultation table in the same database as foreign keys. This is the code that I have, please let me know what I am doing wrong

private void btnSubmit_Click(object sender, EventArgs e)
{

DataSet dataSet = new DataSet();
DataSet vdataSet = new DataSet();
DataSet udataSet = new DataSet();

OleDbCommand cmd = conn.CreateCommand();
OleDbCommand cmdd = conn.CreateCommand();
OleDbCommand com = conn.CreateCommand();
OleDbCommand dbc = conn.CreateCommand();

TextBox patID = new TextBox();
TextBox vacID = new TextBox();
TextBox useID = new TextBox();

patID.Visible = false;
vacID.Visible = false;
useID.Visible = false;

cmd.CommandText = "SELECT patientID FROM patient WHERE fName = '" + cbPatient.GetItemText(cbPatient.SelectedItem) + "'";
cmdd.CommandText = "SELECT vaccineID FROM vaccine WHERE vName = '" + listVaccine.GetItemText(listVaccine.SelectedItem) + "'";
com.CommandText = "SELECT userID FROM userDetails WHERE username = '" + cbUserName.GetItemText(cbUserName.SelectedItem) + "'";
dbc.CommandText = "INSERT INTO Consultation (date, patientID, vaccineID, userID, diagnosis) VALUES ('" + DateTime.Now.ToString() + "', " + patID.Text + ", " + vacID.Text + ", " + useID.Text + ", '" + cbDiagnosis.SelectedItem + "')";

conn.Open();

OleDbDataAdapter dataAdapter = new OleDbDataAdapter(cmd);
OleDbDataAdapter vdataAdapter = new OleDbDataAdapter(cmdd);
OleDbDataAdapter udataAdapter = new OleDbDataAdapter(com);
OleDbDataAdapter da = new OleDbDataAdapter(dbc);

dataAdapter.Fill(dataSet);
vdataAdapter.Fill(vdataSet);
udataAdapter.Fill(udataSet);

patID.Text = dataSet.Tables[0].Rows[0].ItemArray[0].ToString();
vacID.Text = vdataSet.Tables[0].Rows[0].ItemArray[0].ToString();
useID.Text = udataSet.Tables[0].Rows[0].ItemArray[0].ToString();

MessageBox.Show(patID.Text);
MessageBox.Show(vacID.Text);
MessageBox.Show(useID.Text);

dbc.ExecuteNonQuery();

conn.Close();

MessageBox.Show("Entry added!");

}

Re: Updating an access database table using C#

Richard MacCutchan27-Oct-11 0:32

Richard MacCutchan

27-Oct-11 0:32

1. Please use <pre> tags round your code, and indentation in it, so that it is readable.
2. Please explain what problem you are having with the above code.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: Updating an access database table using C#

BobJanova27-Oct-11 3:05

BobJanova

27-Oct-11 3:05

That looks like it should work (assuming that that insert statement matches the schema of the table you're trying to put stuff into), though having retrieved the three tables you probably want to set them as DataSource on something. What problem are you having?

You should use parameterised queries though, as they're better in several ways and avoid the possibility of a SQL injection attack (which would appear to be present here).

Re: Updating an access database table using C#

jschell27-Oct-11 8:35

jschell

27-Oct-11 8:35

Print your SQL string before you use them.
You need to expect that exceptions will occur and you must provide a mechanism for dealing with them in some way.

I doubt that you are correctly constructing the value for 'date'.

"Linked open data" in C# ASP.Net

shanNSK26-Oct-11 20:49

shanNSK

26-Oct-11 20:49

Is any Linked Open data projects in C#, ASP.Net available for learning RDF/XML?

Re: How to Convert URL to URI in rdf format?

OriginalGriff26-Oct-11 22:00

OriginalGriff

26-Oct-11 22:00

Don't just post the same question in Q&A and the forums - pick one and stick to it.

Ideological Purity is no substitute for being able to stick your thumb down a pipe to stop the water

C# access setting file

sc steinhayse26-Oct-11 5:46

sc steinhayse

26-Oct-11 5:46

I need to change the location of where a database file is located in a C#.net 2008 desktop application, but I am hacing problems. When stepping through the code, I find that I need to change a 'settings.settings' file. Bascially I need to be able to access the properties in some kind of a designer and I jhave not be able to do that. Would you have an idea of where I can obtain the directions to access the settings.settings file?

Re: C# access setting file

Richard MacCutchan26-Oct-11 6:23

Richard MacCutchan

26-Oct-11 6:23

Assuming that you are using Visual Studio then use your mouse to right-click on the project name and select Properties. This will open a project properties tab and the settings selector is half way down on the left. Select the relevant item and edit as required.

Alternatively check the Properties folder in your project directory and you will find the file there. It's an XML file that you can edit with your favourite editor.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Preferred style

Reiss26-Oct-11 5:24

Reiss

26-Oct-11 5:24

I have written the following

List<Project> UserProjects = ...

string domain = cbxDomain.SelectedValue.ToString();
HashSet<string> itemsToShow = new HashSet<string>(); // See annotation 0

And I was wondering which of the two snippets below people prefer

A) Use a Predicate

foreach (Project p in UserProjects.FindAll(delegate(Project x){return x.DomainName.Equals(domain);}))
{
    itemsToShow.Add(p.ProjectName);
}

Or

B) Nested if

foreach (Project p in UserProjects)
{
    if (p.DomainName.Equals(domain))
    {
        itemsToShow.Add(p.ProjectName);
    }
}

⁰If you haven't used HashSet before, it is basically a List that sort of behaves like a Dictionary in that doesn't allow duplicates, but doesn't throw an exception if you try and add a duplicate. (I know that's an over simplification, - see MSDN[^] for full description)

Re: Preferred style

harold aptroot26-Oct-11 5:37

harold aptroot

26-Oct-11 5:37

Given the choices, the second. FindAll with an old-style anonymous function is a bit ugly in my opinion. Do you have the option of replacing that with a LINQ query?

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