C#

SledgeHammer01 wrote:

if you throw a bunch of files into the same archive it archives all the files as one chunk vs. individual files

SledgeHammer01 wrote:

if I loop throw the rows and compress each column in memory ...

Luc Pattyn wrote:

I have never met a compressor that does that; in apps such as 7zip and WinZip,
each file is compressed individually, and can be extracted on its own, even
after deleting some or all of the others.

Luc Pattyn wrote:

How do you compress that? which classes and/or algorithms are involved?

foreach (SoftDataSet.tblScriptRow row in ds.tblScript.Rows)
{
                int i = row.Text.Length;
                a += i;

                System.Diagnostics.Debug.WriteLine("BEFORE: " + row.Text.Length);


                SevenZip.Compression.LZMA.Encoder encoder = new SevenZip.Compression.LZMA.Encoder();

                SevenZip.CoderPropID[] propIDs = 
				{
					SevenZip.CoderPropID.DictionarySize,
					SevenZip.CoderPropID.PosStateBits,
					SevenZip.CoderPropID.LitContextBits,
					SevenZip.CoderPropID.LitPosBits,
					SevenZip.CoderPropID.Algorithm,
					SevenZip.CoderPropID.NumFastBytes,
					SevenZip.CoderPropID.MatchFinder,
					SevenZip.CoderPropID.EndMarker
				};

                Int32 dictionary = 0x00800000;
                Int32 posStateBits = 2;
                Int32 litContextBits = 3; // for normal files
                Int32 litPosBits = 0;
                Int32 algorithm = 2;
                Int32 numFastBytes = 128;
                string mf = "bt4";
                bool eos = false;

                object[] properties = 
				{
					(Int32)(dictionary),
					(Int32)(posStateBits),
					(Int32)(litContextBits),
					(Int32)(litPosBits),
					(Int32)(algorithm),
					(Int32)(numFastBytes),
					mf,
					eos
				};

                encoder.SetCoderProperties(propIDs, properties);


                MemoryStream ms = new MemoryStream(row.Text);
                MemoryStream msOut = new MemoryStream();

                encoder.WriteCoderProperties(msOut);
                encoder.Code(ms, msOut, -1, -1, null);

                System.Diagnostics.Debug.WriteLine("AFTER: " + msOut.Position + " " + (msOut.Position) * 100 / i + "%");
                b += (int)msOut.Position;
            }

            System.Diagnostics.Debug.WriteLine("1: " + a + " 2: " + b);
}

Luc Pattyn wrote:

I have never met a compressor that does that; in apps such as 7zip and WinZip,
each file is compressed individually, and can be extracted on its own, even
after deleting some or all of the others.

using System.Threading;
using System.Windows.Forms;


    public delegate void AddSubjectDelegate(ListViewItem item);

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            StartAddItem();
            new ThreadStart(StartThread).BeginInvoke(null, null);
        }
        private void StartThread()
        {
            StartAddItem();
        }
        private void StartAddItem()
        {
            ListViewItem listItem = new ListViewItem("mathematics");
            AddSubjectDelegate addSubject = new AddSubjectDelegate(AddListItem);
            if (lvSubjects.InvokeRequired)
            {
                lvSubjects.Invoke(addSubject, listItem);
            }
            else
                addSubject(listItem);
        }
        private void AddListItem(ListViewItem item)
        {
            lvSubjects.Items.Add(item);
        }
    }

pmcm wrote:

var x1 = new Excel.Application();

using Excel = Microsoft.Office.Interop.Excel;

Eddy Vluggen wrote:

Shouldn't work in 4.0 either

Namespace Mine.Test
    Public Class SomeClass
        Public Property P As Guid
    End Class
End Namespace

--

Imports ScratchVb.Mine

Module Module1
    Sub Main()
        ' VB.NET allows you to use "a part" of the namespace as a prefix
        Dim X As Object = New Test.SomeClass()
    End Sub
End Module

using System;
namespace Mine.Test
{
    class SomeClass
    {
        public Guid P { get; set; }
    }
}

--

using Mine;

namespace Scratch
{
    class Program
    {
        static void Main(string[] args)
        {
            // Prefixing a part of the name isn't allowed
            Object X = new Test.SomeClass();
            // Full namespace is allowed, of course;
            Object X = new Mine.Test.SomeClass();
        }
    }
}

Bastard Programmer from Hell

Eddy Vluggen wrote:

That tells us that you have probably used VB to implement the example, as C# doesn't allow a prefix of the classname with a partial namespace;

Eddy Vluggen wrote:

Yes, read the article some time ago. Did you try it?

Richard MacCutchan wrote:

Yes I tried it, using C#

Bastard Programmer from Hell

Eddy Vluggen wrote:

Never mind

using some1.some2.some3;

using System.Windows.Forms; 
...
Form f=new Form();   // works as the full type name is System.Windows.Forms.Form
Forms.Form f2=f;     // doesn't work as now prefixing System.Windows.Forms would result in a double "Forms"