C# Discussion Boards - CodeProject

Re: Compress a Folder

Nuri Ismail26-Mar-10 22:19

Nuri Ismail

26-Mar-10 22:19

This[^] might help. Smile | :)

Re: Compress a Folder

harold aptroot26-Mar-10 22:21

harold aptroot

26-Mar-10 22:21

anishkannan wrote:
GZipStream only accept a file Stream

Actually no, it can take any Stream

Anyway, GZipStream has very week compression and is (as you saw) hard to use. SharpZipLib[^] is much easier to use and compresses a lot better. It supports GZip in addition to Zip(64 and normal) and BZip2, it even supports streams that can not seek.

Re: Compress a Folder

AspDotNetDev26-Mar-10 23:17

AspDotNetDev

26-Mar-10 23:17

Not sure if C# supports Zip archives out of the box. Though you could use XML to easily create your own file format. Not sure if they are compatible with programs like WinZip, but check out System.IO.Packaging.ZipPackage (you must add a reference to WindowsBase.dll to use the Packaging namespace). The bottom of that page also has links to other libraries and such you can use if that doesn't work for you.

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Re: Compress a Folder

AspDotNetDev26-Mar-10 23:21

AspDotNetDev

26-Mar-10 23:21

Additional resources: DotNetZip, Use J# To Compress Folders From C#.

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how to convert our cheak box button act as a radio button

poonam jagdale26-Mar-10 21:22

poonam jagdale

26-Mar-10 21:22

should I use event method or to a code for that?
please give me solution.

Re: how to convert our cheak box button act as a radio button

Abhinav S26-Mar-10 21:31

Abhinav S

26-Mar-10 21:31

You need to write your own code to make a set of check boxes act like a group of radio buttons - probably in the event, as you mentioned.

Me, I'm dishonest. And a dishonest man you can always trust to be dishonest.
Honestly. It's the honest ones you want to watch out for...

Re: how to convert our cheak box button act as a radio button

dan!sh 26-Mar-10 21:51

dan!sh

26-Mar-10 21:51

Why not use RadioButton itself?

bulkcopy.writetoserver()

RajaAhmed26-Mar-10 19:16

RajaAhmed

26-Mar-10 19:16

actully i want to copy the XML file into the database table, but in distination table there is an extra column. i want to add a new column and gave it a value.

DataSet ds = new DataSet();
ds.ReadXml("C:\\abc.xml");
DataTable sourceData = new DataTable();
sourceData = ds.Tables[0];

DataColumn UID = new DataColumn();
UID.DataType = System.Type.GetType("System.Int32");
UID.ColumnName = "UID";

sourceData.Columns.Add(UID);
sourceData.Columns["UID"] = 12;

i have done the mapping....

bulkCopy.ColumnMappings.Add("UID", "UID");
.
.
.
.
and in end
bulkCopy.DestinationTableName = "Contact";

bulkCopy.WriteToServer(sourceData);

but UID column always gave the null value in database...
any idea??

Re: bulkcopy.writetoserver()

RajaAhmed26-Mar-10 21:43

RajaAhmed

26-Mar-10 21:43

i got it...

i have tried this

for (int i = 0; i <= ds.Tables[0].Rows.Count - 1; i++)
{
ds.Tables[0].Rows[i]["UID"] = 12; // or your dates
}

instead of

ds.Tables[0].Columns.Add("UID").defaultValue=12;

Thanks to every one of those who could not help me

Design Question

programmervb.netc++26-Mar-10 17:24

programmervb.netc++

26-Mar-10 17:24

Currently the application I have is single threaded. When the user goes into the form it sends a query to mySQL and starts to populate the UI with data.
The question I have is should I being running this on a separate thread using the invoke methods or is there some other/better way of doing this.
The queries are fairly optimized although they are not stored procs. When we run this in some of our centers that are on VPN this can take alot of time.
Any ideas and or suggestions welcome.
Thank you.
BTW I will be doing this reworking in VS2010 so these would actually be task...

Humble Programmer

Re: Design Question

Luc Pattyn26-Mar-10 17:33

Luc Pattyn

26-Mar-10 17:33

IMO everything that fetches data outside the local PC needs to be threaded (as well as lengthy calculations), you simply should never let the GUI responsiveness depend on external factors. However I'm not sure many will agree, this point of view may well be considered too academic.

Example: I just finished tthis article[^], it is a little app that fetches web pages from the CodeProject site, using BackgroundWorkers. Data fetching tends to take several seconds.

Smile | :)

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Getting an article published on CodeProject should be easier and faster.

Re: Design Question

programmervb.netc++26-Mar-10 17:36

programmervb.netc++

26-Mar-10 17:36

What are your thoughts on updating the ui like that would it be better to load all of the data into a class and update the ui from that

Humble Programmer

Re: Design Question

Ravi Bhavnani26-Mar-10 20:14

Ravi Bhavnani

26-Mar-10 20:14

I think that goes without saying. But using MVC or MVVM doesn't preclude performing the data fetch asynchronously.

/ravi

My new year resolution: 2048 x 1536
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Re: Design Question

programmervb.netc++26-Mar-10 21:45

programmervb.netc++

26-Mar-10 21:45

I am not familiar with MVS MVVM...
I am referring to winforms I don't know if that makes a difference or not...

Humble Programmer

Re: Design Question

AspDotNetDev26-Mar-10 23:35

AspDotNetDev

26-Mar-10 23:35

MVVM = Model View View-Model

Model = "class" (what holds the data)
View = "ui" (what presents the data)
View-Model = "ui class" (adds properties and such to a model so it plays well with the view)

Of those, the view-model is probably the most difficult to understand. For example, if you had a TreeView (a "view" component) that presented Animals (the model/class), you'd use an AnimalNode that both holds a reference to an Animal (exposing all it's properties) and has properties such as "IsSelected" (a view-centric property that needs to be stored somewhere, in this case on the view-model).

That's the high level... but to answer your question, yes it's a good idea to store data in instances of a class and then present that using a ui. I recommend loading all the data into an intermediate collection on a different thread, then call back to the main thread to present all that data in the view. Depending on the scenario, you may want to present the items in a streaming manner rather than after it's completely loaded (streaming = slower, but user gets first results faster).

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Re: Design Question

PIEBALDconsult27-Mar-10 4:31

PIEBALDconsult

27-Mar-10 4:31

Pretty much any lengthy processing should be performed on a separate thread.

check for URL problem

Jassim Rahma26-Mar-10 12:42

Jassim Rahma

26-Mar-10 12:42

I am using this code when for activated to get the URL address but the Messagebox keeps poping up when user clicked Yes or No.. why it's not returning? where is my mistake?

private void frmLinksEntry_Activated(object sender, EventArgs e)
{
    string url_address = Clipboard.GetText();

    if (url_address != string.Empty)
    {
        try
        {
            System.Uri xx = new Uri(url_address);

        }
        catch (FormatException exp)
        {
            return;
        }

        if (MessageBox.Show("Do you want to use the selected URL?", "Link", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
        {
            txtURL.Text = url_address;
        }
    }
}

Re: check for URL problem

Alan N26-Mar-10 13:22

Alan N

26-Mar-10 13:22

You have shown a handler for the Activated event which will be called whenever the frmLinksEntry control receives focus. It's a bad idea to pop up a messagebox from the handler as this causes the control to lose and then regain focus. The Activated event fires again and the messagebox reopens etc etc etc.

Alan.

Re: check for URL problem

Jassim Rahma26-Mar-10 13:26

Jassim Rahma

26-Mar-10 13:26

but that's what i want, i mean when the user go to copy the URL from the browser then comes back to my application with the URL in clipboard and the frmLinksEntry active it should ask if he wants to use the copied URL?!

Re: check for URL problem

AspDotNetDev26-Mar-10 23:48

AspDotNetDev

26-Mar-10 23:48

If the URL you get from the clipboard is the same as the URL in the textbox, then do not show the dialog again.

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Re: check for URL problem

Jassim Rahma27-Mar-10 12:17

Jassim Rahma

27-Mar-10 12:17

but it's not the same! the textbox is empty already!

Re: check for URL problem

AspDotNetDev30-Mar-10 23:12

AspDotNetDev

30-Mar-10 23:12

I didn't say anything about the textbox being empty.

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bullets and numberring in RTF

Jassim Rahma26-Mar-10 12:33

Jassim Rahma

26-Mar-10 12:33

How can I apply bullets or numbering for the selected text in Rich Text Control using C#? and how to make the selected numbering 2 if there is a previous numbered 1?

create Microsoft Word Document in C#

Jassim Rahma26-Mar-10 12:18

Jassim Rahma

26-Mar-10 12:18

I am trying to create Microsoft Word Document in C# using [this article] and other articles but it's not working! the Word.Application is not recognized! do I have to add a using declaration as well?

Re: create Microsoft Word Document in C#

Alan N26-Mar-10 13:37

Alan N

26-Mar-10 13:37

How do you expect anyone to give you a solution if your only symptom is "It's not working"?

Alan.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.