C# Discussion Boards - CodeProject

Re: HttpWebRequest Timeout Problem

surfman193-Sep-05 14:36

surfman19

3-Sep-05 14:36

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

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

Re: HttpWebRequest Timeout Problem

Andy Brummer3-Sep-05 17:03

Andy Brummer

3-Sep-05 17:03

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

Re: HttpWebRequest Timeout Problem

surfman194-Sep-05 1:23

surfman19

4-Sep-05 1:23

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

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

)
cu

Curciut problem

Niklas Ulvinge3-Sep-05 3:30

Niklas Ulvinge

3-Sep-05 3:30

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

Re: Curciut problem

rudy.net3-Sep-05 5:21

rudy.net

3-Sep-05 5:21

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

Re: Curciut problem

Niklas Ulvinge3-Sep-05 5:33

Niklas Ulvinge

3-Sep-05 5:33

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

Now, how to extract low nibble and high nibble from a byte?

bouli3-Sep-05 3:15

bouli

3-Sep-05 3:15

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.

Re: Now, how to extract low nibble and high nibble from a byte?

Colin Angus Mackay3-Sep-05 3:21

Colin Angus Mackay

3-Sep-05 3:21

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

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Re: Now, how to extract low nibble and high nibble from a byte?

Guffa3-Sep-05 6:09

Guffa

3-Sep-05 6:09

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; }

Please Heeeeeeeeelp: Problem with Pinvoke???

E6AD3-Sep-05 2:46

E6AD

3-Sep-05 2:46

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.

looping statement

Anonymous3-Sep-05 1:53

Anonymous

3-Sep-05 1:53

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

Re: looping statement

Guffa3-Sep-05 2:10

Guffa

3-Sep-05 2:10

What is the problem, then?

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

Re: looping statement

Libor Tinka3-Sep-05 2:42

Libor Tinka

3-Sep-05 2:42

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 />

Re: looping statement

Colin Angus Mackay3-Sep-05 3:23

Colin Angus Mackay

3-Sep-05 3:23

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

My C++ MFC-app into a dll -> to be used in .NET app…

anderslundsgard3-Sep-05 1:25

anderslundsgard

3-Sep-05 1:25

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

How to concatenate 2 nibbles in 1 byte?

bouli3-Sep-05 1:22

bouli

3-Sep-05 1:22

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.

Re: How to concatenate 2 nibbles in 1 byte?

Guffa3-Sep-05 2:10

Guffa

3-Sep-05 2:10

Multiply the most significant nibble by 16 and add them together.

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

Re: How to concatenate 2 nibbles in 1 byte?

bouli3-Sep-05 2:11

bouli

3-Sep-05 2:11

hi guffa,

a code snippet maybe? thanks Smile | :)

There is no spoon.

Re: How to concatenate 2 nibbles in 1 byte?

leppie3-Sep-05 2:11

leppie

3-Sep-05 2:11

byte AddNibbles(byte a , byte b)
{
  return (a & 0xF) << 4 | (b & 0xF);
}

^{xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots}

Re: How to concatenate 2 nibbles in 1 byte?

bouli3-Sep-05 2:12

bouli

3-Sep-05 2:12

ah, just what I needed Smile | :)

Thanks

There is no spoon.

Re: How to concatenate 2 nibbles in 1 byte?

Anonymous3-Sep-05 2:13

Anonymous

3-Sep-05 2:13

Use the following code :

byte nib1,nib2,finalByte;

finalByte = (nib1 << 4) | (nib2 & 0x0f);

-Atul, Sky Software http://www.ssware.com
Shell MegaPack For ActiveX & .Net - Windows Explorer Like Shell UI Controls

Re: How to concatenate 2 nibbles in 1 byte?

bouli3-Sep-05 2:16

bouli

3-Sep-05 2:16

Thanks!

There is no spoon.

Need help! - accessing disposed object

Libor Tinka3-Sep-05 0:35

Libor Tinka

3-Sep-05 0:35

When I dispose Control calling Control.Dispose() method, deactivate window and then re-activate window, I get ObjectDisposedException.

Does anybody know how to avoid Windows.Forms creating handle of a disposed control?

Re: Need help! - accessing disposed object

if_mel_yes_else_no3-Sep-05 8:47

if_mel_yes_else_no

3-Sep-05 8:47

If I'm reading this right. You have a form with a control, and then in your code you dispose of the control? So when you try to activate the window it throws the exception about the disposed object? That's because your form thinks it still exists when you go to re-activate the window. Before you dispose the object, you should remove it from the form with form.controls.remove(yourControl). Then you can dispose of the object all you want.

Re: Need help! - accessing disposed object

Libor Tinka3-Sep-05 9:06

Libor Tinka

3-Sep-05 9:06

When I use Controls.Remove(Control), the form start to working weird. It seems to be inactive (light blue) and blinking when clicked, but still keeping inactive.

I also tried to use SuspendLayout() and ResumeLayout() methods. Nothing changed.

And when all things worked (I had to remove more controls), Windows.Forms already tried to access correctly REMOVED and DISPOSED object calling its CreateHandle() method.

The last thing I've done was to change design of my app. I have no more time to solve these bugs, maybe later.

Thanks for answer!

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