HttpWebRequest Timeout Problem - C# Discussion Boards

Well!
i m having some trouble in writing this piece of code in c#. i m having some type conversion erros pls help me
specially the loop portion

Dim ids As Object
ScannerManager.EnumDeviceIDs(ids)
List.Items.Clear()

Dim i As Integer
For i = LBound(ids) To UBound(ids)
List.Items.Add(ids(i))
Next i
// signature and prototype information
'EnumDeviceIDs(ref Object)
returns array of strings that contain info
'public virtual new void EnumDeviceIDs ( System.Object IDs )

I M new in .net p

[Message Deleted]

Hi
Its not clear from the code exactly what the EnumDeviceIDS method creates ids as, but i'll assume it is a .NET string array. In which case the code should be something like:

// ids is initially null;
object ids = null;
ScannerManager.EnumDeviceIDs(ref ids);

// we now need to convert ids to an array to let us loop
string[] arrids = (string[])ids;
List.Items.Clear();

// our for loop can become a nicer foreach
foreach(string id in arrids)
{
  List.Items.Add(str);
}

/* This is all just explanation, so is commented
 * // signature and prototype information
 * EnumDeviceIDs(ref Object)
 * returns array of strings that contain info
 * 'public virtual new void EnumDeviceIDs ( System.Object IDs )
 */

Hope this helps
Philip Big Grin | :-D

-- modified at 15:18 Saturday 3rd September, 2005

Problem is as follows:

got 100 PictureBoxes that are formed into 10x10 matrix. Their name is 'digit??', where '?' represents a single digit (digit00, digit01, ..., digit99). I would like to swiftly put all these PictureBoxes into one array. I tried:

PictureBox[,] References = new PictureBox[10,10]; 
...
for(int i=0;i<9;i++)
    for(int j=0;j<9;j++)
    {
	this.References[i,j] = ((PictureBox)(String.Format("this.digits{0}{1}",i,j)));    
    }

which is of course not legal, as strings cannot be converted into PictureBoxes. I know it may be done using the Reflection Emit, but I`m looking for another way. Any hints?

-- modified at 13:08 Saturday 3rd September, 2005

It doesn't really make sense to me to create 100 picture boxes and then set an array to reference these 100 picture boxes. Why don't you use an array object to create the 100 picture boxes in the first place? Since you have a 10x10 matrix of them, there will be a mathematical formula for creating the pictureboxes. Just use a for loop and create all 100 picture boxes, so that they will be easily accessible. If the problem is that each box contains a specific image file, you should label all the images with the same scheme..ie: img00.bmp, img01.bmp...etc. I've used this approach when designing little quick games.

Is there anyway to have a program notified of time change events in Windows? For example if I wanted to be notifed when the hour changed...is this possible?

Thanks

- Aaron

There's a timer control. You give it a number of milliseconds, and when that time interval has passed it throws an event that you can receive. To receive a message every hour just set the interval to 3600000 milliseconds.

hi,
i have a problem when i send a HttpRequest!
first i send a request to get the session_id than a login request and after that a other request....
after that i begin with the request for session_id and than the problem arise when i send the login request...
i get a timeout error when i call request.GetRequestStream (); by why!?!

cu

<br />
request for session id:<br />
-----------------------<br />
HttpWebRequest get_request = (HttpWebRequest)WebRequest.Create("https://www.myzone.at/webkeeper/Controller");<br />
get_request.CookieContainer = new CookieContainer();<br />
      <br />
HttpWebResponse get_response = (HttpWebResponse) get_request.GetResponse();<br />
get_response.Cookies = get_request.CookieContainer.GetCookies(get_request.RequestUri);<br />
<br />
String sessionid = "Cookie: ";<br />
sessionid += get_response.Cookies[0].ToString();<br />
<br />
login request:<br />
--------------<br />
HttpRequestResponse login_request = new HttpRequestResponse("https://www.myzone.at/webkeeper/Controller", "POST", "action=login&login=Anmelden&brand=myzone&username=xxxxxx&password=xxxxxxb&x=83&y=13");<br />
login_request.SESSION_ID = sessionid;<br />
login_request.SendRequest();<br />
<br />
<br />
<br />
sendrequest method:<br />
-----------------------------------------<br />
public string SendRequest()<br />
{<br />
    string responseFromServer="";<br />
<br />
    try<br />
    {<br />
        if((RequestMethod.ToUpper() != "GET") && (RequestMethod.ToUpper() != "POST"))<br />
            throw new WebException(RequestMethod+ " is not a valid method.  Use GET or POST.");<br />
<br />
        // Create a request using a URL that can receive a post. <br />
        HttpWebRequest request = (HttpWebRequest) WebRequest.Create(URL);<br />
        // Set the Method property of the request to POST.<br />
                request.Method = RequestMethod;<br />
        // Set the sessionid to the Header<br />
        request.Headers.Add(SessionId);<br />
<br />
        // check if asked to do a POST request, if so then modify <br />
        // the original request as it defaults to a GET method<br />
        if(RequestMethod.ToUpper()=="POST") <br />
        {<br />
            // Create POST data and convert it to a byte array.<br />
            byte[] byteArray = Encoding.UTF8.GetBytes (PostData);<br />
                    <br />
            // Set the ContentType property of the WebRequest.<br />
            request.ContentType = "application/x-www-form-urlencoded";<br />
                    <br />
            // Set the ContentLength property of the WebRequest.<br />
            request.ContentLength = byteArray.Length;<br />
                    <br />
            // Get the request stream.<br />
            Stream requestStream = request.GetRequestStream ();     <------------ here arise the timeout when i send the 2nd login request...<br />
                    <br />
            // Write the data to the request stream.<br />
            requestStream.Write (byteArray, 0, byteArray.Length);<br />
            // Close the Stream object.<br />
            requestStream.Close ();<br />
        }<br />
                <br />
        // Get the response.<br />
        HttpWebResponse response = (HttpWebResponse) request.GetResponse();<br />
        // Get the stream containing content returned by the server.<br />
        Stream dataStream = response.GetResponseStream ();<br />
        // Open the stream using a StreamReader for easy access.<br />
        StreamReader reader = new StreamReader (dataStream);<br />
        // Read the content.<br />
        responseFromServer = "HTTP/" + response.ProtocolVersion + " " + response.StatusDescription + " ";<br />
        responseFromServer += response.Headers.ToString();<br />
<br />
        // Clean up the streams.<br />
        reader.Close ();<br />
        dataStream.Close ();<br />
        response.Close ();<br />
    }<br />
<br />
    catch (WebException e)<br />
    {<br />
        throw CatchHttpExceptions(responseFromServer = e.Message);<br />
    }<br />
    catch (Exception e)<br />
    {<br />
        throw new Exception(responseFromServer = e.Message);<br />
    }<br />
<br />
    return responseFromServer;<br />
}<br />

I think the problem is that you don't close your original response. It's been a while since I used these objects, but I seem to remember getting that problem if I didn't properly clean up after every request.

I can imagine the sinking feeling one would have after ordering my book,
only to find a laughably ridiculous theory with demented logic once the book arrives - Mark McCutcheon

hi,
and whats that, here i close it! hmmmmm....

<br />
// Clean up the streams.<br />
reader.Close ();<br />
dataStream.Close ();<br />
response.Close ();       <--------------<br />

cu

It might not be the problem, but in your sample code I didn't see where the original request and response were closed:

HttpWebRequest get_request = (HttpWebRequest)WebRequest.Create("https://www.myzone.at/webkeeper/Controller");
get_request.CookieContainer = new CookieContainer();

HttpWebResponse get_response = (HttpWebResponse) get_request.GetResponse();
get_response.Cookies = get_request.CookieContainer.GetCookies(get_request.RequestUri);

String sessionid = "Cookie: ";
sessionid += get_response.Cookies[0].ToString();

//Close get_response and get_request here.

login request:
--------------
HttpRequestResponse login_request = new HttpRequestResponse("https://www.myzone.at/webkeeper/Controller", "POST", "action=login&login=Anmelden&brand=myzone&username=xxxxxx&password=xxxxxxb&x=83&y=13");
login_request.SESSION_ID = sessionid;
login_request.SendRequest();

Also, I assume you have tried changing the request timeout value of the request object and setting it to a high enough value.

I can imagine the sinking feeling one would have after ordering my book,
only to find a laughably ridiculous theory with demented logic once the book arrives - Mark McCutcheon

hi, yeahhhhh i found the error Wink | ;-)

))
i forgot to close the get_response: get_response.Close();
now all works perfect Wink | ;-)

)
cu

I got a hard problem I don't know how to solve...
How do I, with the classes in item.cs, make elecrisity go from a battery throu two cords and back to the battery again. I'll implement the ohm's later...
How do the cord know when it should flow elecrisity. Confused | :confused:

item.cs:

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Text;

namespace NiklasUlvinge.ChipsEater
{
    abstract class Item
    {
        //var's
        public Item[][] input;
        public int x;
        public int y;

        public abstract Strom Output
        {
            get;
        }
        public abstract Point[] Snap
        {
            get;
        }

        protected Item(int X, int Y)
        {
            x = X;
            y = Y;
            input = new Item[1][];
        }

        //abstract funcs
        public abstract void function();
        public abstract void draw(Graphics g);
        //funcs
        public void addBothInput(int index, int fromIndex, Item Input)
        {
            Input.addInput(fromIndex, this);

            this.addInput(index, Input);
        }
        private void addInput(int index, Item Input)
        {
            index = input.Length & index;

            Item[] inp = input[index];

            Item[] titem;

            if (inp == null)
            {
                titem = new Item[1];
            }
            else
                titem = new Item[inp.Length];

            for (int i = 0; i < titem.Length - 1; i++)
            {
                titem[i] = inp[i];
            }
            titem[titem.Length - 1] = Input;
            input[index] = titem;
        }
        public Strom combinedInput(int index)
        {
            Strom r = 0;
            if (input[index] == null)
                return 0;
            else
            {
                for (int i = 0; i < input[index].Length; i++)
                {
                    r += input[index][i].Output[j];
                }
                return r;
            }
        }

        //const
        protected Brush surf = Brushes.LightGray;
        protected Pen side = Pens.DarkGray;
        protected Pen loff = Pens.Black;
        protected Pen lon = Pens.Red;
    }

    class Null : Item
    {
        public override Strom Output
        {
            get
            {
            }
        }
        public override Point[] Snap
        {
            get
            {
                return new Point[0];
            }
        }

        public Null(int X, int Y)
            : base(X, Y)
        {
        }

        public override void function()
        {
            throw new Exception("The method or operation is not implemented.");
        }
        public override void draw(Graphics g)
        {
            throw new Exception("The method or operation is not implemented.");
        }
    }

    class Transistor : Item
    {
        protected float[] output;
        public Null theNull = new Null(-50, -50);


        public override Strom Output
        {
            get
            {
                Strom r;
                if (strom.l - strom.r > 0)
                {
                    r.l = strom.l;
                    r.r = strom.r;
                }
                else
                {
                    r.l = strom.l;
                    r.r = strom.r;
                }
            }
        }
        public override Point[] Snap
        {
            get
            {
                return new Point[3] {
                    new Point(x - 16, y - 1),
                    new Point(x + 3, y - 16),
                    new Point(x + 3, y + 16)};
            }
        }

        public Transistor(int X, int Y) : base(X, Y)
        {
            input = new Item[4][];
            output = new float[1];
        }

        public override void function()
        {
            if (combinedInput(0) > 0)
                output[0] = combinedInput(1);
            else
                output[0] = 0;
        }
        public override void draw(Graphics g)
        {
            IntPtr intp;
            //get the right image...
            if (combinedInput(0) == 0)
                if (combinedInput(1) == 0)
                    if (output[0] == 0)
                        intp = Properties.Resources.trans000.GetHbitmap();
                    else
                        intp = Properties.Resources.trans001.GetHbitmap();
                else
                    if (output[0] == 0)
                        intp = Properties.Resources.trans010.GetHbitmap();
                    else
                        intp = Properties.Resources.trans011.GetHbitmap();
            else
                if (combinedInput(1) == 0)
                    if (output[0] == 0)
                        intp = Properties.Resources.trans100.GetHbitmap();
                    else
                        intp = Properties.Resources.trans101.GetHbitmap();
                else
                    if (output[0] == 0)
                        intp = Properties.Resources.trans110.GetHbitmap();
                    else
                        intp = Properties.Resources.trans111.GetHbitmap();

            g.DrawImage(Image.FromHbitmap(intp), x - Image.FromHbitmap(intp).Size.Width / 2, y - Image.FromHbitmap(intp).Size.Height / 2);
        }
    }

    class Cord : Item
    {
        public int x2, y2;
        public Null theNull = new Null(-50, -50);

        public override Strom Output
        {
            get
            {
                Strom o,
                    l = combinedInput(0),
                    r = combinedInput(1);

                //what to do?
                
            }
        }
        public override Point[] Snap
        {
            get
            {
                return new Point[2] {
                    new Point(x, y),
                    new Point(x2, y2) };
            }
        }
        
        public Cord(int X1, int Y1)
            : base(X1, Y1)
        {
            input = new Item[2][];
        }

        public override void function()
        {
        }
        public override void draw(Graphics g)
        {
            g.DrawLine(combinedInput(0) > 0 ? lon : loff,
                x, y, x2, y2);
        }
    }

    class Battery : Item
    {
        public Null theNull = new Null(-50, -50);

        public override float[] Output
        {
            get
            {
                return new float[1] { 1 };
            }
        }
        public override Point[] Snap
        {
            get
            {
                return new Point[2] {
                    new Point(x - 5, y),
                    new Point(x + 5, y) };
            }
        }

        public Battery(int X, int Y)
            : base(X, Y)
        {
        }

        public override void function()
        {
        }
        public override void draw(Graphics g)
        {
            g.DrawLine(lon, x - 2, y - 10, x - 2, y + 10);
            g.DrawLine(lon, x + 2, y - 6, x + 2, y + 6);
            g.DrawLine(lon, x - 2, y, x - 5, y);
            g.DrawLine(lon, x + 2, y, x + 5, y);
        }
    }
}

form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace NiklasUlvinge.ChipsEater
{
    public partial class Form1 : Form
    {
        Item[] items = new Item[0];
        bool mouseIsDown = false;
        Point startingPoint;
        Cord newCord;

        public Form1()
        {
            InitializeComponent();
        }

        private void PB_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;

            g.Clear(Color.White);

            for (int i = 0; i < items.Length; i++)
            {
                items[i].draw(g);
            }

        }


        private void addItem(Item item)
        {
            Item[] titem = new Item[items.Length + 1];

            for (int i = 0; i < items.Length; i++)
            {
                titem[i] = items[i];
            }
            titem[items.Length] = item;
            items = titem;
        }

        private void PB_MouseClick(object sender, MouseEventArgs e)
        {
            switch (treeItems.SelectedNode.Name)
            {
            case "NodeLst1":
                addItem(new Transistor(e.X,e.Y));
                break;
            case "NodeLst2":
                addItem(new Battery(e.X, e.Y));
                break;
            }

            this.Refresh();
        }

        private void PB_MouseDown(object sender, MouseEventArgs e)
        {
            switch (treeItems.SelectedNode.Name)
            {
            case "NodeLst0":
                startingPoint = new Point(-2,-2);
                //if the point should snapp
                for (int i = 0; i < items.Length; i++)
                {
                    Point[] pts = items[i].Snap;
                    for (int j = 0; j < pts.Length; j++)
                    {
                        if ((Math.Abs(pts[j].X - e.X) < 5) && (Math.Abs(pts[j].Y - e.Y) < 5))
                        {
                            startingPoint = new Point(pts[j].X, pts[j].Y);
                            newCord = new Cord(startingPoint.X, startingPoint.Y);
                            
                            items[i].addBothInput(0,0,newCord);
                        }
                    }
                }
                if (startingPoint == new Point(-2, -2))
                {
                    startingPoint = new Point(e.X, e.Y);
                    newCord = new Cord(startingPoint.X, startingPoint.Y);
                }
                mouseIsDown = true;
                break;
            }
        }
        private void PB_MouseUp(object sender, MouseEventArgs e)
        {
            switch (treeItems.SelectedNode.Name)
            {
            case "NodeLst0":
                mouseIsDown = false;
                int theX = e.X,
                    theY = e.Y;

                for (int i = 0; i < items.Length; i++)
                {
                    Point[] pts = items[i].Snap;
                    for (int j = 0; j < pts.Length; j++)
                    {
                        if ((Math.Abs(pts[j].X - e.X) < 5) && (Math.Abs(pts[j].Y - e.Y) < 5))
                        {
                            theX = pts[j].X;
                            theY = pts[j].Y;
                            items[i].addBothInput(j,0, newCord);
                        }
                    }
                }

                
                //if it snapped to input
                    newCord.x2 = theX;
                    newCord.y2 = theY;

                addItem(newCord);
                newCord = null;
                break;
            }
            this.Refresh();
        }
        private void PB_MouseMove(object sender, MouseEventArgs e)
        {
            if (mouseIsDown)
            {
                Graphics g = PB.CreateGraphics();
                this.Refresh();
                g.DrawLine(Pens.Black, startingPoint, new Point(e.X, e.Y));
            }
        }

    }
}

Niklas Ulvinge aka IDK

I could not compile your code because type "Strom" is not defined. Can you also provide this as well?

Form1.Designer.cs:

namespace NiklasUlvinge.ChipsEater
{
    partial class Form1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            System.Windows.Forms.TreeNode treeNode1 = new System.Windows.Forms.TreeNode("Cord");
            System.Windows.Forms.TreeNode treeNode2 = new System.Windows.Forms.TreeNode("Transistor");
            System.Windows.Forms.TreeNode treeNode3 = new System.Windows.Forms.TreeNode("Battery");
            System.Windows.Forms.TreeNode treeNode4 = new System.Windows.Forms.TreeNode("lowest", new System.Windows.Forms.TreeNode[] {
            treeNode1,
            treeNode2,
            treeNode3});
            this.menuStrip1 = new System.Windows.Forms.MenuStrip();
            this.toolStrip1 = new System.Windows.Forms.ToolStrip();
            this.splitContainer1 = new System.Windows.Forms.SplitContainer();
            this.treeItems = new System.Windows.Forms.TreeView();
            this.PB = new System.Windows.Forms.PictureBox();
            this.splitContainer1.Panel1.SuspendLayout();
            this.splitContainer1.Panel2.SuspendLayout();
            this.splitContainer1.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.PB)).BeginInit();
            this.SuspendLayout();
            // 
            // menuStrip1
            // 
            this.menuStrip1.Location = new System.Drawing.Point(0, 0);
            this.menuStrip1.Name = "menuStrip1";
            this.menuStrip1.Size = new System.Drawing.Size(608, 24);
            this.menuStrip1.TabIndex = 0;
            this.menuStrip1.Text = "menuStrip1";
            // 
            // toolStrip1
            // 
            this.toolStrip1.Location = new System.Drawing.Point(0, 24);
            this.toolStrip1.Name = "toolStrip1";
            this.toolStrip1.Size = new System.Drawing.Size(608, 25);
            this.toolStrip1.TabIndex = 1;
            this.toolStrip1.Text = "toolStrip1";
            // 
            // splitContainer1
            // 
            this.splitContainer1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.splitContainer1.Location = new System.Drawing.Point(0, 49);
            this.splitContainer1.Name = "splitContainer1";
            // 
            // splitContainer1.Panel1
            // 
            this.splitContainer1.Panel1.Controls.Add(this.treeItems);
            // 
            // splitContainer1.Panel2
            // 
            this.splitContainer1.Panel2.Controls.Add(this.PB);
            this.splitContainer1.Size = new System.Drawing.Size(608, 376);
            this.splitContainer1.SplitterDistance = 83;
            this.splitContainer1.TabIndex = 3;
            this.splitContainer1.Text = "splitContainer1";
            // 
            // treeItems
            // 
            this.treeItems.Dock = System.Windows.Forms.DockStyle.Fill;
            this.treeItems.Location = new System.Drawing.Point(0, 0);
            this.treeItems.Name = "treeItems";
            treeNode1.Name = "NodeLst0";
            treeNode1.Text = "Cord";
            treeNode1.ToolTipText = "A simple current wire";
            treeNode2.Name = "NodeLst1";
            treeNode2.Text = "Transistor";
            treeNode2.ToolTipText = "A transistor";
            treeNode3.Name = "NodeLst2";
            treeNode3.Text = "Battery";
            treeNode3.ToolTipText = "A simple battery";
            treeNode4.Name = "NodeLst";
            treeNode4.Text = "lowest";
            treeNode4.ToolTipText = "The lowest things of circuts";
            this.treeItems.Nodes.AddRange(new System.Windows.Forms.TreeNode[] {
            treeNode4});
            this.treeItems.ShowRootLines = false;
            this.treeItems.Size = new System.Drawing.Size(83, 376);
            this.treeItems.TabIndex = 0;
            // 
            // PB
            // 
            this.PB.Dock = System.Windows.Forms.DockStyle.Fill;
            this.PB.Location = new System.Drawing.Point(0, 0);
            this.PB.Name = "PB";
            this.PB.Size = new System.Drawing.Size(521, 376);
            this.PB.TabIndex = 1;
            this.PB.TabStop = false;
            this.PB.MouseMove += new System.Windows.Forms.MouseEventHandler(this.PB_MouseMove);
            this.PB.Paint += new System.Windows.Forms.PaintEventHandler(this.PB_Paint);
            this.PB.MouseClick += new System.Windows.Forms.MouseEventHandler(this.PB_MouseClick);
            this.PB.MouseUp += new System.Windows.Forms.MouseEventHandler(this.PB_MouseUp);
            this.PB.MouseDown += new System.Windows.Forms.MouseEventHandler(this.PB_MouseDown);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(608, 425);
            this.Controls.Add(this.splitContainer1);
            this.Controls.Add(this.toolStrip1);
            this.Controls.Add(this.menuStrip1);
            this.MainMenuStrip = this.menuStrip1;
            this.Name = "Form1";
            this.Text = "Form1";
            this.splitContainer1.Panel1.ResumeLayout(false);
            this.splitContainer1.Panel2.ResumeLayout(false);
            this.splitContainer1.ResumeLayout(false);
            ((System.ComponentModel.ISupportInitialize)(this.PB)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.MenuStrip menuStrip1;
        private System.Windows.Forms.ToolStrip toolStrip1;
        private System.Windows.Forms.SplitContainer splitContainer1;
        private System.Windows.Forms.PictureBox PB;
        private System.Windows.Forms.TreeView treeItems;
    }
}

Program.cs:

using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace NiklasUlvinge.ChipsEater
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.Run(new Form1());
        }
    }
}

strom.cs

namespace NiklasUlvinge.ChipsEater
{
    struct Strom
    {
        public float l, r;

        public Strom(float left, float right)
        {
            l=left;
            r = right;
        }

        public static Strom operator +(Strom a, Strom b)
        {
            return new Strom(a.l + b.l, a.r + b.r);
        }

        public static bool operator ==(Strom a, Strom b)
        {
            if (a.l == b.l && a.r == b.r)
                return true;
            else
                return false;
        }
        public static bool operator !=(Strom a, Strom b)
        {
            return !(a == b);
        }
    }
}

the new item.cs file:

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Text;

namespace NiklasUlvinge.ChipsEater
{
    abstract class Item
    {
        //var's
        public Item[][] input;
        public int x;
        public int y;

        public abstract Strom LeftOutput
        {
            get;
        }
        public abstract Strom RightOutput
        {
            get;
        }
        public abstract Point[] Snap
        {
            get;
        }

        protected Item(int X, int Y)
        {
            x = X;
            y = Y;
            input = new Item[1][];
        }

        //abstract funcs
        public abstract void function();
        public abstract void draw(Graphics g);
        //funcs
        public void addBothInput(int index, Item Input)
        {
            Input.addInput(1 - index, this);

            this.addInput(index, Input);
        }
        private void addInput(int index, Item Input)
        {
            index = input.Length & index;

            Item[] inp = input[index];

            Item[] titem;

            if (inp == null)
            {
                titem = new Item[1];
            }
            else
                titem = new Item[inp.Length];

            for (int i = 0; i < titem.Length - 1; i++)
            {
                titem[i] = inp[i];
            }
            titem[titem.Length - 1] = Input;
            input[index] = titem;
        }
        public Strom combinedInput(int index)
        {
            Strom r = new Strom(0, 0);
            if (input[index] == null)
                return new Strom(0, 0);
            else
            {
                for (int i = 0; i < input[index].Length; i++)
                {
                    if (index == 0)
                        r += input[index][i].LeftOutput;
                    else
                        r += input[index][i].RightOutput;
                }
                return r;
            }
        }

        //const
        protected Brush surf = Brushes.LightGray;
        protected Pen side = Pens.DarkGray;
        protected Pen loff = Pens.Black;
        protected Pen lon = Pens.Red;
    }

    class Null : Item
    {

        public override Strom LeftOutput
        {
            get
            {
                return new Strom(0, 0);
            }
        }
        public override Strom RightOutput
        {
            get
            {
                return new Strom(0, 0);
            }
        }
        public override Point[] Snap
        {
            get
            {
                return new Point[0];
            }
        }

        public Null(int X, int Y)
            : base(X, Y)
        {
        }

        public override void function()
        {
            throw new Exception("The method or operation is not implemented.");
        }
        public override void draw(Graphics g)
        {
            throw new Exception("The method or operation is not implemented.");
        }
    }

    class Transistor : Item
    {
        protected float[] output;
        public Null theNull = new Null(-50, -50);


        public override Strom LeftOutput
        {
            get
            {
                return new Strom(0, 0);
            }
        }
        public override Strom RightOutput
        {
            get
            {
                return new Strom(0, 0);
            }
        }
        public override Point[] Snap
        {
            get
            {
                return new Point[3] {
                    new Point(x - 16, y - 1),
                    new Point(x + 3, y - 16),
                    new Point(x + 3, y + 16)};
            }
        }

        public Transistor(int X, int Y) : base(X, Y)
        {
            input = new Item[4][];
            output = new float[1];
        }

        public override void function()
        {
        }
        public override void draw(Graphics g)
        {
            IntPtr intp;
            //get the right image...
            if (combinedInput(0) == new Strom(0, 0))
                if (combinedInput(1) == new Strom(0, 0))
                    if (output[0] == 0)
                        intp = Properties.Resources.trans000.GetHbitmap();
                    else
                        intp = Properties.Resources.trans001.GetHbitmap();
                else
                    if (output[0] == 0)
                        intp = Properties.Resources.trans010.GetHbitmap();
                    else
                        intp = Properties.Resources.trans011.GetHbitmap();
            else
                if (combinedInput(1) == new Strom(0, 0))
                    if (output[0] == 0)
                        intp = Properties.Resources.trans100.GetHbitmap();
                    else
                        intp = Properties.Resources.trans101.GetHbitmap();
                else
                    if (output[0] == 0)
                        intp = Properties.Resources.trans110.GetHbitmap();
                    else
                        intp = Properties.Resources.trans111.GetHbitmap();

            g.DrawImage(Image.FromHbitmap(intp), x - Image.FromHbitmap(intp).Size.Width / 2, y - Image.FromHbitmap(intp).Size.Height / 2);
        }
    }

    class Cord : Item
    {
        public int x2, y2;
        public Null theNull = new Null(-50, -50);

        public override Strom LeftOutput
        {
            get
            {
                return combinedInput(1);
            }
        }
        public override Strom RightOutput
        {
            get
            {
                return combinedInput(0);
            }
        }
        public override Point[] Snap
        {
            get
            {
                return new Point[2] {
                    new Point(x, y),
                    new Point(x2, y2) };
            }
        }
        
        public Cord(int X1, int Y1)
            : base(X1, Y1)
        {
            input = new Item[2][];
        }

        public override void function()
        {
        }
        public override void draw(Graphics g)
        {
            g.DrawLine(combinedInput(0) == new Strom(0,0) ? loff : lon,
                x, y, x2, y2);
        }
        public override string ToString()
        {
            return "L: l" + combinedInput(1).l + " r" + combinedInput(1).l + "R: l" + combinedInput(0).l + " r" + combinedInput(0).l;
        }
    }

    class Battery : Item
    {
        public Null theNull = new Null(-50, -50);


        public override Strom LeftOutput
        {
            get
            {
                return new Strom(100,-100);
            }
        }
        public override Strom RightOutput
        {
            get
            {
                return new Strom(-100, 100);
            }
        }
        public override Point[] Snap
        {
            get
            {
                return new Point[2] {
                    new Point(x - 5, y),
                    new Point(x + 5, y) };
            }
        }

        public Battery(int X, int Y)
            : base(X, Y)
        {
            input = new Item[2][];
        }

        public override void function()
        {
        }
        public override void draw(Graphics g)
        {
            g.DrawLine(lon, x - 2, y - 10, x - 2, y + 10);
            g.DrawLine(lon, x + 2, y - 6, x + 2, y + 6);
            g.DrawLine(lon, x - 2, y, x - 5, y);
            g.DrawLine(lon, x + 2, y, x + 5, y);
        }
        public override string ToString()
        {
            return "L: l" + combinedInput(1).l + " r" + combinedInput(1).l + "R: l" + combinedInput(0).l + " r" + combinedInput(0).l;
        }
    }
}

Niklas Ulvinge aka IDK

Hello again gurus,

Now I can concatenate two nibbles into a byte, how can I do the reverse operation??
That is extracting the high nibble and low nibble from a byte?

Thanks for the help Smile | :)

Best regards.

There is no spoon.

byte nibble1 = 0x0F & byteValue;
byte nibble2 = (0xF0 & byteValue)/16;

My: Blog | Photos
WDevs.com - Open Source Code Hosting, Blogs, FTP, Mail and More

To get the high nibble, you shift the value four bits to the right.
To get the low nibble, you mask out the lower four bits.

hi = myByte >> 4;<br />
lo = myByte & 15;

---
b { font-weight: normal; }

Dear All,

How can I marshall the following attributes in the following structure;

typedef struct IplImage
{.
.
struct _IplROI * roi;
void * imageid;

}

where _IplROI is itself a structure?

Another question is that the function unmanaged prototype is ;

IplImage * cvvLoadImage(const char * filename);

do I have to marshall the return type after defining the IplImage or I just write "IplImage *" after marshalling the structure??

Please Help,

Thanks and Best Regards,
E.A.

can anyone kmow how to program my problem about looping and factorial in c programming? please....ill w8 for your reply...

What is the problem, then?

---
b { font-weight: normal; }

Non-recursive version (not tested):
-----------------------------------

<br />
int Calc(int i) {<br />
<br />
  int fact = 1;<br />
  for (int j = i; j > 1; j--)<br />
    fact *= j;<br />
<br />
  return fact;<br />
}<br />

Recursive version (from MSDN):
------------------------------

<br />
int Calc(int i) { <br />
  return((i <= 1) ? 1 : (i * Calc(i-1))); <br />
}<br />

Anonymous wrote:
anyone kmow how to program my problem

I don't know, you've not told us what your problem is exactly.

My: Blog | Photos
WDevs.com - Open Source Code Hosting, Blogs, FTP, Mail and More

I’ve mad an application (or apart of an app) in C++ that I’d like to use in .NET C# Windows Application.
The thing I like to accomplish is to build some kind of component of my existing C++ app and expose some functions that I later can call from the C# app.
The application I like to encapsulate can be seen ass a window (MFC CWnd in my case).
My fist question is if this is possible? If, then my second Q is How..?
I’ve made som COM and ActiveX programming but I don't (if it's possible) want to solve my problem that way.
I’m not expecting a total solution of my problem but Ideas where to start would be great.
Articles about this would be great. (Have not found any of them myself…)

_____________________________

...and justice for all

APe

Hello gurus,

As the subject of this topic says, I wish to know how to concatenate 2 nibbles to give 1 byte in C#?

Thanks for the help.

Best regards.

There is no spoon.