Re: Update Shorthand? - C# Discussion Boards

GetGuiThreadInfo can not get the caret's position

22-Jul-13 1:46

What does this have to do with C#?? A dropped connection doesn't have anything to do with your code. Once the connection starts it's up to Encoder and the client to keep it going. Your code has nothing to do with it.

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Dave Kreskowiak

goldli8820-Jul-13 23:12

goldli88

20-Jul-13 23:12

I want to get the caret position with my C# application.but in some cases ,GetGuiThreadInfo does not work creectly.

it works well on

1. notepad
2. ie
3. explorer
4. word

and works bad on (hwndCaret will be 0)

1. Visual Studio
2. Firefox
3. Sublime Text 2

Anyone who can helps me?

public partial class Form1 : Form
        {
    
            [DllImport("user32.dll")]
            public static extern IntPtr GetForegroundWindow();
    
            [DllImport("user32.dll", CharSet = CharSet.Auto)]
            public static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
            
            [DllImport("user32.dll")]
            static extern uint GetWindowThreadProcessId(IntPtr hWnd, IntPtr ProcessId);
    
            [DllImport("user32.dll")]
            static extern bool GetGUIThreadInfo(uint idThread, ref GUITHREADINFO lpgui);
    
    
            [StructLayout(LayoutKind.Sequential)]
            public struct GUITHREADINFO
            {
                public int cbSize;
                public int flags;
                public IntPtr hwndActive;
                public IntPtr hwndFocus;
                public IntPtr hwndCapture;
                public IntPtr hwndMenuOwner;
                public IntPtr hwndMoveSize;
                public IntPtr hwndCaret;
                public Rectangle rectCaret;
            }
    
            public  GUITHREADINFO? GetGuiThreadInfo(IntPtr hwnd)
            {
                if (hwnd != IntPtr.Zero)
                {
                    uint threadId = GetWindowThreadProcessId(hwnd, IntPtr.Zero);
    
                    GUITHREADINFO guiThreadInfo = new GUITHREADINFO();
                    guiThreadInfo.cbSize = Marshal.SizeOf(guiThreadInfo);
    
                    if (GetGUIThreadInfo(threadId, ref guiThreadInfo) == false)
                        return null;
                    return guiThreadInfo;
                }
                return null;
            }
    
            public void SendText(string text)
            {
                IntPtr hwnd = GetForegroundWindow();
                if (String.IsNullOrEmpty(text))
                    return;
                GUITHREADINFO? guiInfo = GetGuiThreadInfo(hwnd);
                AddMessage("go");
                if (guiInfo != null)
                {
                    IntPtr ptr = (IntPtr)guiInfo.Value.hwndCaret;
                    AddMessage("hwndCaret = " + ptr.ToInt32());
                    if (ptr != IntPtr.Zero)
                    {
                        AddMessage("Left = " + guiInfo.Value.rectCaret.Left);
                        for (int i = 0; i < text.Length; i++)
                        {
                            SendMessage(ptr, 0x102, (IntPtr)(int)text[i], IntPtr.Zero);
                        }
                    }
                }
            }
    
            public Form1()
            {
                InitializeComponent();
            }
    
            private void AddMessage(string message)
            {
                var i = listBox1.Items.Add(message);
                listBox1.SelectedIndex = i;
            }
    
            private void button1_Click(object sender, EventArgs e)
            {
                Thread.Sleep(2000);
                //textBox1.Focus();
                SendText("Abcdefg");
                AddMessage("------------");
            }
        }

How to Create Dynamic Buttons With Students Roll No. on It From Database

jackspero1820-Jul-13 1:38

jackspero18

20-Jul-13 1:38

hey Friends....

I have a Table with Name (Student_Table)
fields(Stdid, StdRollNo, StuName)
with 5 records

And A windows Form With Name Form1

Now, My question is..
I want Dynamic Buttons equals to students records ie.. 5 buttons,
on That Buttons i want Student Roll No.

please guys help me

Jack_Spero

Re: How to Create Dynamic Buttons With Students Roll No. on It From Database

Garth J Lancaster20-Jul-13 2:05

Garth J Lancaster

20-Jul-13 2:05

your question has been answered in the other forum you asked it in - a friendly bit of advice - please dont cross post - pick the best forum, post the question once !

'g'

C# unmanage DLL export

hijeenu19-Jul-13 10:32

hijeenu

19-Jul-13 10:32

Hello
I have been trying to export a string array from my C# unmanged DLL export to metatrader , but can not do that , please need you expert suggestion ..

[DllExport("_CheckStringArray", CallingConvention = CallingConvention.StdCall)]
        public static void _CheckStringArray([In, Out, MarshalAs(UnmanagedType.LPStr)]              StringBuilder []  str)
        {
         try
            {
                str[0].Append("hello");
            }
            catch (Exception e)
            {
                MessageBox.Show(e.ToString());
            }
        }

#import "CyboMySqlRead.dll"
   void  _CheckStringArray(string  s[]);

   //-- import end

   string array [3] ;

   //-- calling dll method , should update first index with "hello"
    _CheckStringArray(array)

   Print(array[0]);  // nothing is printed here...

Update Shorthand?

eddieangel19-Jul-13 8:37

eddieangel

19-Jul-13 8:37

Is there a shorthand for updating an object? Something like an initializer?

var item = new FooViewModel { id = "test", name = "test" };

Something like that but instead:

Record myRecord = Context.RecordRepository.GetById(1234);

myRecord {
id = 123,
name = "blah"
}

Cheers, --EA

Re: Update Shorthand?

Dave Kreskowiak19-Jul-13 9:50

Calling VB 6 OCX from C# EXE

19-Jul-13 9:50

No, there isn't.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Re: Update Shorthand?

Abhinav S19-Jul-13 18:48

Abhinav S

19-Jul-13 18:48

The best you can do is try and using LINQ to fetch and update records in the same line.

However, what you are tyring to do is not directly possible.

Apps - Color Analyzer | Arctic | XKCD | Sound Meter | Speed Dial

Re: Update Shorthand?

Jean A Brandelero22-Jul-13 3:59

Jean A Brandelero

22-Jul-13 3:59

In VB.net its called "WITH"
C# dont have this trick... But, you can use this:

/// <summary>
/// C# implementation of Visual Basics With statement
/// </summary>
public static void With<T>(this T _object, Action<T> _action)
{
    _action(_object);
}

Usage:

LongInstanceOfPersonVariableName.With(x => {
     x.AgeIntVar = 21;
     x.NameStrVar = "John";
     x.NameStrVar += " Smith";
     //etc..
});

from http://stackoverflow.com/a/5964848[^]
I dont think its the best solution... But... It may work.

modified 24-Jul-13 7:36am.

matinon2219-Jul-13 2:18

matinon22

19-Jul-13 2:18

I have C# MDI Form EXE as a framework. In which I have to deployed my VB 6 OCX, and also calls another VB 6 OCX from displayed OCX events.

Is this possbile? where I have to make changes C# or VB 6.0?
Does anyone has made similar kind of project before?

Any link?

Thanks in Advance

Re: Calling VB 6 OCX from C# EXE

Dave Kreskowiak19-Jul-13 2:21

Re: Calling VB 6 OCX from C# EXE

19-Jul-13 2:21

It's just a COM component. You just add a reference to it and use it like any other class.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

matinon2223-Jul-13 22:18

matinon22

23-Jul-13 22:18

Thanks Dave,

fisrt COM component loaded fine in C#.net exe framework. My problem is to load another COM component into same C#.net exe framework, and this second COM component will be called from first COM component.

Hope you understand my problem.

Any idea?

Re: Calling VB 6 OCX from C# EXE

Dave Kreskowiak24-Jul-13 3:52

24-Jul-13 3:52

Exactly the same as before. You add a reference to it.

You're problem is that your COM componets should not be calling into each other. That would be a hard-code tie where you couldn't use one component without the other. That's just a bad design.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Generic collections

PozzaVecia19-Jul-13 0:09

19-Jul-13 0:09

I need to use a generic collection of keyvalue pair. I need thr folloeing:

1) should be generic because my values are a customized class
2) iterating should keep the order in which I added Items
3) I should be able to find the index of the element
4) I need access via Key

A dictionary is ok for 1,2,4 but not for 3
SortedList and SortedDictionary are ok for 1, 3, 4 but not for 2.
If I create a

List<keyvaluepair>

it is ok for 1,2,3 but not for 4 ( I mean not directly)

//Dictionary<string, double> d = new Dictionary<string, double>();
SortedList<string, double> d = new SortedList<string, double>();
            d.Add("z", 1);
            d.Add("a", 2);
            d.Add("c", 3);
            d.Add("b", 4);

            foreach (KeyValuePair<string,double> k in d)
            {
                Console.WriteLine(k.Key + " " + k.Value);
            }

// output: a 2  b 4 c 3 z 1
// but i need to preserve the order in whicth I added.
// I need output: z 1 a 2 c 3 b 4
// using Dictionary I preserve the order but how can select item using an index?

KeyValuePair<string, double> i_item = d.ElementAt(2); // if d is a Dictionary it is not possible

Any suggestion?
Thanks for your time

Nicholas Marty19-Jul-13 0:41

19-Jul-13 0:41

If I change your code to use a Dictionary it works for me... Confused | :confused:

If you directly want to access a value you can also do this:

var value = d["c"];

whil returns the value 3 in this case.

What error do you get when using the Dictionary class?

PozzaVecia19-Jul-13 1:12

19-Jul-13 1:12

KeyValuePair<string, double> i_item = d.ElementAt(2); // if d is a Dictionary it is not possible

may be I was not clear I can't get item from index value. For example I need the second element How can I ask the Dictionary the second element?
The dictionary is an unsorted collection

Nicholas Marty19-Jul-13 1:17

19-Jul-13 1:17

An unsorted collection is what you're looking for if you want to prevent the order in which the items were added.

And I don't know what error you're getting when calling

KeyValuePair<string, double> i_item = d.ElementAt(2);

as this works just fine for me with a dictionary

PozzaVecia19-Jul-13 1:26

19-Jul-13 1:26

thanks you are right sorry. Basically I need to find the index from the key and viceversa.

How can I find the index related to the key "3", from the dictionary. It should be 2

Nicholas Marty19-Jul-13 2:07

19-Jul-13 2:07

Why do you need to be able to get the index of a KeyValuePair if you already got the key? Confused | :confused:

Maybe take a look at the hint from Keith.

Note: As I just saw after a bit of researching, the Dictionary uses some hashing of the keys to create some order which means it does not necessarily return the items in the order in which they were added

Source: http://msdn.microsoft.com/en-us/library/xfhwa508.aspx[^]

Quote:
For purposes of enumeration, each item in the dictionary is treated as a KeyValuePair<tkey, tvalue=""> structure representing a value and its key. The order in which the items are returned is undefined.

Keith Barrow19-Jul-13 1:04

Keith Barrow

19-Jul-13 1:04

Ordered Dictionary[^] has access via the index and the key. Looks promising.

PB 369,783 wrote:
I just find him very unlikeable, and I think the way he looks like a prettier version of his Mum is very disturbing.[^]

Nicholas Marty19-Jul-13 2:09

19-Jul-13 2:09

But its not Generic Laugh | :laugh:

Well one could create a Generic wrapper for it Wink | ;)

Keith Barrow19-Jul-13 2:33

Keith Barrow

19-Jul-13 2:33

I'll get me coat.

PB 369,783 wrote:
I just find him very unlikeable, and I think the way he looks like a prettier version of his Mum is very disturbing.[^]

Richard Deeming19-Jul-13 3:22

Richard Deeming

19-Jul-13 3:22

This article might help: OrderedDictionary<T>: A generic implementation of IOrderedDictionary[^]

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

BillWoodruff21-Jul-13 0:57

BillWoodruff

21-Jul-13 0:57

I really like (and upvoted) your question; it was fun to see what I could implement quickly, and I'm going to post the code here before I read the other responses on the thread, since I feel I can learn something from knowing whether or not the code I post actually meets your requirements, and, possibly, learning from other people's responses.

I wonder if I have not just duplicated the functionality of a Dictionary<K, V> ? Also, I suspect Linq queries could be used in some way, efficiently here, rather than, as I did, creating two Lists in the class (memory cost ?).

Disclaimer: I've tested only with KeyValuePair<string, double> since that's what you used. Testing with instances of a custom class as K, or V: that's on my list Smile | :)

Here's the revised class:

public class IndexedKVPList<K, V> : List<KeyValuePair<K, V>>
{
    private readonly List<K> keyList = new List<K>();
    private readonly List<V> valueList = new List<V>();

    // modified to use 'new
    new public void Add(KeyValuePair<K, V> newKVP)
    {
        keyList.Add(newKVP.Key);
        valueList.Add(newKVP.Value);
        base.Add(newKVP);
    }

    // new function to Remove KeyValue pair
    new public void Remove(KeyValuePair<K, V> killKVP)
    {
        if(! this.Contains(killKVP)) throw new Exception("error in Remove in IndexedKVPPair");

        keyList.Remove(killKVP.Key);
        valueList.Remove(killKVP.Value);
        base.Remove(killKVP);
    }

    public KeyValuePair<K, V> GetKVPByValue(V theValue)
    {
        return this[valueList.IndexOf(theValue)];
    }

    public K GetKeyByValue(V theValue)
    {
        return this[valueList.IndexOf(theValue)].Key;
    }

    // new function to get the index by KeyValue pair
    public int GetIndexByKVP(KeyValuePair<K, V> theKVPPair)
    {
        return this.IndexOf(theKVPPair);
    }

    // new function to get the index by Value
    // what happens if there are multiple identical values ?
    public int GetIndexByValue(V theValue)
    {
        return (valueList.IndexOf(theValue));
    }

    public KeyValuePair<K, V> GetKVPByKey(K theKey)
    {
        return this[keyList.IndexOf(theKey)];
    }

    public V GetValueByKey(K theKey)
    {
        return this[keyList.IndexOf(theKey)].Value;
    }

    // new function to get the index by Key
    public int GetIndexByKey(K theKey)
    {
        return (keyList.IndexOf(theKey));
    }
}

Here's the revised test:

XML

private void TestIKVP()
{
    var iKVList = new IndexedKVPList<string, double>();

    for (int i = 0; i < 10; i++)
    {
        iKVList.Add(new KeyValuePair<string, double>("Key: " + i, i));
    }

    var kvp1 = iKVList.GetKVPByKey("Key: 8");
    var kvp2 = iKVList.GetKVPByValue(6);

    Console.WriteLine(kvp1 + " " + kvp2);

    // test Remove function
    iKVList.Remove(iKVList[4]);

    foreach (var theKVP in iKVList)
    {
        Console.WriteLine(theKVP.Key + " Value:" + theKVP.Value.GetType());
    }

    Console.WriteLine(iKVList.GetIndexByKVP(kvp2));
    Console.WriteLine(iKVList.GetIndexByKey("Key: 9"));
    Console.WriteLine(iKVList.GetIndexByValue(3));
}

~
“This isn't right; this isn't even wrong." Wolfgang Pauli, commenting on a physics paper submitted for a journal

modified 22-Jul-13 7:06am.

PozzaVecia21-Jul-13 23:05