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  • Directory file size calculation - how to make it faster?

    - by Xinxua
    Using C#, I am finding the total size of a directory. The logic is this way : Get the files inside the folder. Sum up the total size. Find if there are sub directories. Then do a recursive search. I tried one another way to do this too : Using FSO (obj.GetFolder(path).Size). There's not much of difference in time in both these approaches. Now the problem is, I have tens of thousands of files in a particular folder and its taking like atleast 2 minute to find the folder size. Also, if I run the program again, it happens very quickly (5 secs). I think the windows is caching the file sizes. Is there any way I can bring down the time taken when I run the program first time??

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  • Having some fun - what is a good way to include a secret key functionality and fire the KeyDown event?

    - by Sisyphus
    To keep myself interested, I try to put little Easter Eggs in my projects (mostly to amuse myself). I've seen some websites where you can type a series of letters "aswzaswz" and you get a "secret function" - how would I achieve this in C#? I've assigned a "secret function" in the past by using modifier keys bool showFunThing = (Control.ModifierKeys & Keys.Control) == Keys.Control; but wanted to get a bit more secretive (without the modifier keys) I just wanted the form to detect a certain word typed without any input ... I've built a method that I think should do it: private StringBuilder _pressedKeys = new StringBuilder(); protected override void OnKeyDown(KeyEventArgs e) { const string kWord = "fun"; char letter = (char)e.KeyValue; if (!char.IsLetterOrDigit(letter)) { return; } _pressedKeys.Append(letter); if (_pressedKeys.Length == kWord.Length) { if (_pressedKeys.ToString().ToLower() == kWord) { MessageBox.Show("Fun"); _pressedKeys.Clear(); } } base.OnKeyDown(e); } Now I need to wire it up but I can't figure out how I'm supposed to raise the event in the form designer ... I've tried this: this.KeyDown +=new System.Windows.Forms.KeyEventHandler(OnKeyDown); and a couple of variations on this but I'm missing something because it won't fire (or compile). It tells me that the OnKeyDown method is expecting a certain signature but I've got other methods like this where I haven't specified arguments. I fear that I may have got myself confused so I am turning to SO for help ... anyone?

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  • Multiple winform data save problem

    - by Mahesh
    hi am using C# with VS-2005 I have a form1 and about two textBox and one Combobox on it. like below textBox1 texbox2 ComboBox I have bind combobox by sql database. first user type in textbox1 and textbox2 and then goes to comboBox in which "BuyerName" available on it. if user not found the data in the comboBox then press ALT+C for opening of Form2 where they create data and save it. My problem is when I closed the form2 by saving data of "BuyerName" the form1 is open as per my requirement but the data of textBox1 and textBox2 which user typed before opening of form2 is lost and therefore user have to re-type on it. which i don't want as it wasting of time. I want when form2 closed and form1 open the data will be available on it. and when u create fresh "BuyerName" from form2 the "BuyerName" will be automaticaly available on form1 comboBox on closing of form2. Hope u will get it. am new here in programing so kindly suggest me by proper codeing. thx in Advance.

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  • Sending a list of mails with SmtpClient

    - by Malcolm Frexner
    I use SendCompletedEventHandler of SmtpClient when sending a list of emails. The SendCompletedEventHandler is only called when have already sent all emails in the list. I expexted, that SendCompletedEventHandler is called one an email is send. Is there something wrong in my code? public void SendAllNewsletters(List<string> recipients) { string mailText = "My Tex"; foreach(string recipient in recipients) { //if this loop takes 10min then the first call to //SendCompletedCallback is after 10min SendNewsletter(mailText,recipient); } } public bool SendNewsletter(string mailText , string emailaddress) { SmtpClient sc = new SmtpClient(_smtpServer, _smtpPort); System.Net.NetworkCredential SMTPUserInfo = new System.Net.NetworkCredential(_smtpuser, _smtppassword); sc.Credentials = SMTPUserInfo; sc.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback); MailMessage mm = null; mm = new MailMessage(mailText, emailaddress); mm.IsBodyHtml = true; mm.Priority = MailPriority.Normal; mm.Subject = "Something"; mm.Body = "Something"; mm.SubjectEncoding = Encoding.UTF8; mm.BodyEncoding = Encoding.UTF8; //Mail string userState = emailaddress; sc.SendAsync(mm, userState); return true; } public void SendCompletedCallback(object sender, AsyncCompletedEventArgs e) { // Get the unique identifier for this asynchronous operation. String token = (string)e.UserState; if (e.Error != null) { _news.SetNewsletterEmailsisSent(e.UserState.ToString(), _newslettername, false, e.Error.Message); } else { _news.SetNewsletterEmailsisSent(e.UserState.ToString(), _newslettername, true, string.Empty); } }

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  • Webservice and ORM Framework?

    - by Sebastian
    Does anybody know a good web framework that includes an ORM mapper and allows straight forward implementation of web services? I'm looking for a framework written in PHP or C++. I'm looking for the following features (not all of them required, some will do nicely) data definition in one place used by database and web service WSDL generation XML output/JSON output boilerplate code generation So what I would like is a framework that let's me specify the objects, the web service functions on those objects and then generate everything that is required leaving me to fill the business logic (connecting the database to the web service). Anything like that out there? Background information for why I need this: I'm looking into creating a web project: the client is a rich web application that fetches all its data using AJAX. It will be completely custom made using only a low level javascript library. The server back end is supposed to serve static content and javascript (basically the rich web application) and to provide a RESTful web service API (which I would like to implement using aforementioned framework).

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  • Is there a way to allow a property of a user control to be modified only during design time?

    - by Dan
    I've looked into the DesignOnly attribute, but that doesn't seem to accomplish what I want*. Basically, I'm looking for some way to indicate that some property of a user control (let's say Text) can be modified during design time -- i.e., from the Windows Forms designer in VS (or presumably from any GUI designer that can be used to modify a Windows Forms GUI) -- but not during run time. Once the application is running, the property should effectively be readonly. Is this possible? * When I add the DesignOnly attribute to a property, the value I select for that property from design mode doesn't seem to stick; the property just ends up being whatever I have it set to by default in code.

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  • how to implement undo operation in datagridview

    - by ush
    Hi, I have created one application in c#.net.Using this application we can update datagridview,now i need to implement undo in it plz give me some ideas. private void button29_Click(object sender, EventArgs e) { Datatable dt; dt.RejectChanges(); } using above code i can do undo before updating. but i need a undo feature as in word plz suggest me thanks in advance

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  • how to declare a public string with a textbox's text

    - by Ian Lundberg
    i am trying to do public string str = txtText.Text; but it wont let me use txtText.txt so how would I declare that so it can be used everywhere? I can't use it in the button1_click event because if I do it messes it up because I am having a string retrieve from the textbox and set to the textbox so it doesn't work right so I have to have it retrieve the textbox's text somewhere else then set to it.

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  • how to clone a treeview c# and save it to recover later

    - by voodoomsr
    hi all, i need to clone an entire treeview to implement Undo\Redo actions. i try in different ways but it appears that directly isn't possible. I mean copying the entire treeview, save that copy in a list. Then when the Undo action is requested decrement a specific counter of levels of undo and replace the actual treeview with the treeview that exist in the index positions of the list. if I do redo the same happens but lvls is incremented so i recover what come next. Every time that a modifications occurs in the treeview i need to save that copy and increment the lvl counter

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  • Winform Textbox CanGrow ?

    - by bochur1
    I don't find a CanGrow property on the Textbox control. This is common in some other controls, and what it does is expand the control to acomodate more data. Anyway to get this feature in the TextBox?

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  • Hide TabControl buttons to manage stacked Panel controls

    - by Luca
    I need to handle multiple panels, containing variuous data masks. Each panel shall be visible using a TreeView control. At this time, I handle the panels visibility manually, by making the selected one visible and bring it on top. Actually this is not much confortable, especially in the UI designer, since when I add a brand new panel I have to resize every panel and then design it... A good solution would be using a TabControl, and each panel is contained in a TabPage. But I cannot find any way to hide the TabControl buttons, since I already have a TreeView for selecting items. Another solution would be an ipotethic "StackPanelControl", where the Panels are arranged using a stack, but I couldn't find it anywhere. What's the best solution to handle this kind of UI?

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  • Getting the rows cell to line up with parameters in a sp c# winform

    - by Yaron Buki
    I am using a datagridview on a win app designed in c#2010 express. In the _row leave event of my datagrid I would like to use the TableAdapter.usp_insert() that I created. But how does one match up the data in the cells of the datagridview row to the parameters in the stored procedure. Thanks in advance I appreciate the education. This is what if found so far! Int i; i = datagridview1.SelectedCells[0].RowIndex; ... .... Eventually string id = dataGridView1.Rows[i].cell[0].Value.ToString(); @para1 = id; Etc.. What do you think?

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  • Event for "end edit" in a text box

    - by eli.rodriguez
    I am using a textbox in winform (c#) and using the text of to make consults in a database. But i need constantly consult the text of the textbox every time that text change. So for these i use the KeyUp. But this event is too slow. Is any event that just fire when the textbox editing has been finished ?. I consider for finish 2 conditions The control lost focus. The control has 200ms without keypress

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  • C# WebClient - View source question

    - by Jim
    I'm using a C# WebClient to post login details to a page and read the all the results. The page I am trying to load includes flash (which, in the browser, translates into HTML). I'm guessing it's flash to avoid being picked up by search engines??? The flash I am interested in is just text (not an image/video) etc and when I "View Selection Source" in firefox I do actually see the text, within HTML, that I want to see. (Interestingly when I view the source for the whole page I do not see the text, within HTML, that I want to see. Could this be related?) Currently after I have posted my login details, and loaded the HTML back, I see the page which does NOT show the flash HTML (as if I had viewed source for the whole page). Thanks in advance, Jim PS: I should point out that the POST is actually working, my log in is successful.

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  • Better way to kill a Form after the FormClosing event is overridden to hide rather than close?

    - by Paul Sasik
    I have a simple Windows Form that hosts property controls at runtime. To keep the window and its contents alive rather than killing it by handling the FormClosing event, cancel the event and simply hide the form. That's fine but at close of the application I need to actually close the window. I implemented the below but it feels kludgey. Is there a simpler, more clever way to handle this situation? (The form's controller calls KillForm explicitly after it receives a closing event from the main window.) Friend Class HostForm Private _hideInsteadOfClosing As Boolean = True Private Sub HostForm_FormClosing(ByVal sender As Object, ByVal e As FormClosingEventArgs) _ Handles Me.FormClosing If _hideInsteadOfClosing Then Me.Hide() e.Cancel = True End If End Sub Public Sub KillForm() _hideInsteadOfClosing = False Me.Close() End Sub End Class

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  • CSharp Compiler and Windows.Forms

    - by j-t-s
    Hi All I've just created a little app that programmatically compiles code using the C# Compiler, and it works brilliantly. But, one thing that I need it to do is compile Windows.Forms code. Like, I can create a console app with it, but I can't create a GUI-based form. Here's the link that got me started: http://support.microsoft.com/kb/304655 Can somebody please help? Thank you :)

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  • Prevent painting of .NET form while form is loading?

    - by dvcolgan
    Is there a way to turn off all visual updates to a .NET form while I am manipulating it? When my program first loads, for example, I set the tab control to the tab that was last open. The user can see the program switching tabs. I have looked into SuspendLayout and ResumeLayout, but either I don't understand what they are doing, or I am not using them correctly, because they don't seem to have any effect. Someone told me that there used to be a way to turn off paint events in VB 6. Does this still exist in .NET?

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  • Uncertain response from Combobox SelectedItem

    - by MSingh
    I am working in winform and using combobox. I set the properties of combobox in this sequence combobox.DisplayMember = "cust_name"; combobox.ValueMember="cust_id"; combobox.datasource=dtCustomer; I have used combobox in my application several times, I don't know where I am making mistake as Sometime SelectedItem property returns exact value (int,string) based on the data type of "ValueMember" property, but sometime it returns "DataRowView". I've read this is because of the sequence in which properties are setting in combobox. But this is not the case now. Binding code is Calling code is

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  • What Windows message is fired for mouse-up with modifier keys?

    - by Greg
    My WndProc isn't seeing mouse-up notifications when I click with a modifier key (shift or control) pressed. I see them without the modifier key, and I see mouse-down notifications with the modifier keys. I'm using the Windows Forms NativeWindow wrapper to get Windows messages from the WndProc() method. I've tried tracking the notifications I do get, and I the only clue I see is WM_CAPTURECHANGED. I've tried calling SetCapture when I receive the WM_LBUTTONDOWN message, but it doesn't help. Without modifier (skipping paint, timer and NCHITTEST messages): WM_LBUTTONDOWN WM_SETCURSOR WM_MOUSEMOVE WM_SETCURSOR WM_LBUTTONUP With modifier (skipping paint, timer and NCHITTEST messages): WM_KEYDOWN WM_PARENTNOTIFY WM_MOUSEACTIVATE WM_MOUSEACTIVATE WM_SETCURSOR WM_LBUTTONDOWN WM_SETCURSOR (repeats) WM_KEYDOWN (repeats) WM_KEYUP If I hold the mouse button down for a long time, I can usually get a WM_LBUTTONUP notification, but it should be possible to make it more responsive.. What am I missing? Thanks.

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  • How can we extract substring of the string by position and separator.

    - by Harikrishna
    How can we divide the substring from the string Like I have string String mainString="///Trade Time///Trade Number///Amount Rs.///"; Now I have other string String subString="Amount" Then I want to extract the substring Amount Rs. with the help of second string named subString not by any other method But it should be extracted through two parameters like first is I have index no of Amount string and second is until the next string ///.

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