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  • SQLite.Net Issue With BeginTransaction

    - by cam
    I'm trying to use System.Data.Sqlite library, and I'm following the documentation about optimizing inserts so I copied this code directly out of the documentation: using (SQLiteTransaction mytransaction = myconnection.BeginTransaction()) { using (SQLiteCommand mycommand = new SQLiteCommand(myconnection)) { SQLiteParameter myparam = new SQLiteParameter(); int n; mycommand.CommandText = "INSERT INTO [MyTable] ([MyId]) VALUES(?)"; mycommand.Parameters.Add(myparam); for (n = 0; n < 100000; n ++) { myparam.Value = n + 1; mycommand.ExecuteNonQuery(); } } mytransaction.Commit(); } Now, I initialize I connection right before that by using SqlConnection myconnection = new SqlConnection("Data Source=blah"); I have a Database named blah, with the correct tables and values. The problem is when I run this code, it says "Operation is not valid due to the current state of the object" I've tried changing the code around several times, and it still points to BeginTransaction. What gives?

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  • Best way to parse command line arguments in C#

    - by Paul Stovell
    When building console applications that take parameters, you can use the arguments passed to Main(string[] args). In the past I've simply indexed/looped that array and done a few regular expressions to extract the values. However, when the commands get more complicated, the parsing can get pretty ugly. More recently, I built the world's simplest Backus-Naur Form parser in C# to parse the arguments. It does the job, but it also feels like overkill. So I'm interested in: Libraries that you use Patterns that you use Assume the commands always adhere to common standards such as answered here.

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  • Errors when connecting to HTTPS using HTTP::Net routines (Ruby on Rails)

    - by jaycode
    Hi all, the code below explains the problem in detail #this returns error Net::HTTPBadResponse url = URI.parse('https://sitename.com') response = Net::HTTP.start(url.host, url.port) {|http| http.get('/remote/register_device') } #this works url = URI.parse('http://sitename.com') response = Net::HTTP.start(url.host, url.port) {|http| http.get('/remote/register_device') } #this returns error Net::HTTPBadResponse response = Net::HTTP.post_form(URI.parse('https://sitename.com/remote/register_device'), {:text => 'hello world'}) #this returns error Errno::ECONNRESET (Connection reset by peer) response = Net::HTTP.post_form(URI.parse('https://sandbox.itunes.apple.com/verifyReceipt'), {:text => 'hello world'}) #this works response = Net::HTTP.post_form(URI.parse('http://sitename.com/remote/register_device'), {:text => 'hello world'}) So... how do I send POST parameters to https://sitename.com or https://sandbox.itunes.apple.com/verifyReceipt in this example? Further information, I am trying to get this working in Rails: http://developer.apple.com/iphone/library/documentation/NetworkingInternet/Conceptual/StoreKitGuide/VerifyingStoreReceipts/VerifyingStoreReceipts.html#//apple_ref/doc/uid/TP40008267-CH104-SW1

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  • Need help with cycle in JS

    - by antiarchitect
    I have such function, that adds a grid of droppables: function AddClassroomDrops(grid, weeks, days, times) { for(week = 1; week <= weeks; week++) { for (day = 1; day <= days; day++) { for (time = 1; time <= times; time++ ) { Droppables.add('container_grid'+ grid + '_week' + week + '_day' + day + '_time' + time, { accept: 'pair', hoverclass : 'hovered_receiver', onDrop: function(pair, receiver) { new Ajax.Request( '/pairs/'+pair.id+'/update_on_drop', { method : 'put', parameters : { classroom : grid, week : week, day : day, time : time, container : receiver.id } } ); } }); } } } } The problem is that params of Ajax.Request (week, day, time) are always equal to weeks + 1, times + 1, days + 1. But they must vary according to the cycle.

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  • Command line switches parsed out of executable's path

    - by Roger Pate
    Why do Windows programs parse command-line switches out of their executable's path? (The latter being what is commonly known as argv[0].) For example, xcopy: C:\Temp\foo>c:/windows/system32/xcopy.exe /f /r /i /d /y * ..\bar\ Invalid number of parameters C:\Temp\foo>c:\windows\system32\xcopy.exe /f /r /i /d /y * ..\bar\ C:\Temp\foo\blah -> C:\Temp\bar\blah 1 File(s) copied What behavior should I follow in my own programs? Are there many users that expect to type command-line switches without a space (e.g. program/? instead of program /?), and should I try to support this, or should I just report an error and exit immediately? What other caveats do I need to be aware of? (In addition to Anon.'s comment below that "debug/program" runs debug.exe from PATH even if "debug\program.exe" exists.)

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  • Memory leak with preg_replace

    - by Silvio Donnini
    I'm using the preg_replace function to replace accents in a string, I'm working with UTF-8. I have incurred in what seems to be a memory leak, but I can't isolate the root cause, my code is rather simple: preg_replace( array_keys($aToNoAccents), array_values($aToNoAccents), $sText ); where $aToNoAccents is an associative array with entries like '~[A]~u' => 'A', '~[C]~u' => 'C',. My script prints this error for the above line: Fatal error: Allowed memory size of 1073741824 bytes exhausted (tried to allocate 3039 bytes) Obviously it's not a matter of increasing the allowed memory for PHP, (a 1Gb footprint is way off the scale of my application). Also, that line is executed thousands of times without problems but, just for some cases which are difficult to reproduce, it yields the error. Is anyone aware of memory problems with preg_replace and UTF-8 strings? Am I to use special care in passing actual parameters to such function? I'm using PHP 5.2.6-3 with Suhosin-Patch thanks Silvio

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  • Strange thing about .NET 4.0 filesystem enumeration functionality

    - by codymanix
    I just read a page of "Whats new .NET Framework 4.0". I have trouble understanding the last paragraph: To remove open handles on enumerated directories or files Create a custom method (or function in Visual Basic) to contain your enumeration code. Apply the MethodImplAttribute attribute with the NoInlining option to the new method. For example: [MethodImplAttribute(MethodImplOptions.NoInlining)] Private void Enumerate() Include the following method calls, to run after your enumeration code: * The GC.Collect() method (no parameters). * The GC.WaitForPendingFinalizers() method. Why the attribute NoInlining? What harm would inlining do here? Why call the garbage collector manually, why not making the enumerator implement IDisposable in the first place? I suspect they use FindFirstFile()/FindNextFile() API calls for the imlementation, so FindClose() has to be called in any case if the enumeration is done.

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  • Disable auto resize this page when opening in IE

    - by Stan
    If open yahoo finance chart in IE, the chart will be resized to fit the viewing window, and making the chart viewable without scrolling down. However, this makes the chart become smaller for me. I would like to see original size, which requires me to click the setting bar and change something to make it restore original size. The chart shows original size in Chrome. Is it possible to view original size in IE by passing some parameters in url? I was trying looking into source code but found nothing.

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  • Preventing multiple reporting of the same rule violation in FxCop -- What is Id?

    - by Dave
    FxCop is currently reporting the same rule violation for a particular method -- it has two out parameters, because I want to return two values to the caller without creating a struct for it. I wonder if anonymous types would solve my problem, but I didn't know about them at the time I had written the method. Anyhow, I'm getting CheckId CA1021 reported once for each parameter. I've copied the SuppressMessage text from FxCop, and then realized that the Id for each message is different! To me, it seems like you only need the CheckId, so... what is the Id used for? I haven't been able to find information about it online. will the Id remain the same? I assume so, or SuppressMessage wouldn't work the way one would want it to is there a way to specify the SuppressMessage attribute so that it suppresses for all Ids?

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  • In OpenRasta is it possible to Pattern match multiple key/value pairs?

    - by Scott Littlewood
    Is it possible in OpenRasta to have a Uri pattern that allows for an array of values of the same key to be submitted and mapped to a handler method accepting an array of the query parameters. Example: Return all the contacts named Dave Smith from a collection. HTTP GET /contacts?filterBy=first&filterValue=Dave&filterBy=last&filterValue=Smith With a configuration of: What syntax would be best for the Uri string pattern matching? (Suggestions welcome) ResourceSpace.Has.ResourcesOfType<List<ContactResource>>() .AtUri("/contacts") .And.AtUri("/contacts?filterBy[]={filterBy}[]&filterValue[]={fv}[]") // Option 1 .And.AtUri("/contacts?filterBy={filterBy}[]&fv={fv}[]") // Option 2 Would map to a Handler method of: public object Get(params Filter[] filters) { /* create a Linq Expression based on the filters using dynamic linq query the repository using the Linq */ return Query.All<Contact>().Where(c => c.First == "Dave" && c.Last == "Smith").ToResource() } where Filter is defined by public class Filter { public string FilterBy { get; set; } public string FilterValue { get; set; } }

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  • git: How to diff changed files versus previous versions after a pull?

    - by doug
    I'm new to git, using it via Terminal on Snow Leopard. When I run "git pull" I often want to know what changed between the last version of a file and the new one. Say I want to know what someone else committed to a particular file. How is that done? I'm assuming it's "git diff" with some parameters for commit x versus commit y but I can't seem to get the syntax. I also find "git log" confusing a bit and am not sure where to get the commit ID of my latest version of the file versus the new one.

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  • How to call an extended procedure from a function

    - by Alan Featherston Lago
    hi im having trouble trying to get the following function to work. CREATE FUNCTION test ( @nt_group VARCHAR(128) ) RETURNS @nt_usr TABLE ( [name] [nchar](128) NULL , [type] [char](8) NULL , [privilege] [char](9) NULL , [mapped login name] [nchar](128) NULL , [permission path] [nchar](128) NULL ) AS BEGIN INSERT INTO @nt_usr EXEC master.dbo.xp_logininfo 'DOMAIN\USER', @nt_group RETURN END As far as i know i should be allowed to call an extended stored procedure, im getting the following error Mes 443, Level 16, State 14 Could it be that xp_logininfo might return different result sets depending on the parameters? When i use openquery i can overcome this by setting this: SET FMTONLY OFF. Does anyone know if there's a similar workaround for my problem?

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  • Shorter Binding expression with validation

    - by Andrii V
    Hi, I'm repeating same binding parameters for every textbox and they're quite long strings (which is not good for many reasons). And I'm wondering if there's a way to make them shorter? For instance all my controls on forms are using the following binding template: Text="{Binding SourceProperty, UpdateSourceTrigger=PropertyChanged, ValidatesOnExceptions=True, ValidatesOnDataErrors=True, NotifyOnValidationError=True}" I'd would like to have something shorter that ideally will take SourceProperty as parameter. Possbly like this: Text="{MyBinding SourceProperty}" or Text="{Binding SourceProperty, Params=MyParams}" One possible option would be to inherit from Binding and create new markup extension. Did someone tried this? Any other ideas how to make these repetetive bindings look better?

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  • Problem with filling dataset

    - by Brian
    This is a small portion of my code file. Each time my debugger reaches the line 'NewDA.Fill(NewDS);' at runtime it jumps to the catch. I'm positive the daynumber variable gets a value that's present in the database and I've tried the query outside of the codefile on my database and it works fine. I'm also using the connectionstring 'db' on more parts of the code with successful results. string QueryNew = "SELECT activityname AS [Name], activitycategorynumber AS [Category] " + "FROM ACTIVITY WHERE daynumber = @daynumber"; SqlCommand NewCmd = new SqlCommand(QueryNew, db); NewCmd.Parameters.Add("@daynumber", SqlDbType.Int).Value = daynumber; SqlDataAdapter NewDA = new SqlDataAdapter(NewCmd); DataSet NewDS = new DataSet(); NewDA.Fill(NewDS);

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  • If XmlException.SourceUri is read-only, what good is it?

    - by East of Nowhere
    I have a couple places in my code where it throwing a new System.Xml.XmlException seems appropriate. I could just do throw new XmlException("Your XML sucks go fix it then try again."); But I think it's better to take advantage whenever possible of members particular to the exception class (otherwise ya might as well throw a plain ol' Exception every time). SourceUri and LineNumber would be helpful, but they only have get methods, there's no way I can assign a value to them! There's only 3 constructor overloads and none of them have parameters for those members either; I can only initialize Message, nothing else. There has got to be some way to populate those data members with values, otherwise why does XmlException bother with them? I suppose I could make a new class that inherits XmlException and write a new constructor that initializes SourceUri etc. but still, there must be a way to just use XmlException. Right?

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  • How to optimize neural network by using genetic algorithm?

    - by Billy Coen
    I'm quite new with this topic so any help would be great. What i need is to optimize a neural network in MATLAB by using GA. My network has [2x98] input and [1x98] target, i've tried consulting matlab help but im still kind of clueless about what to do :( so, any help would be appreciated. Thanks in advance. edit: i guess i didn't say what is there to be optimized as Dan said in the 1st answer. I guess most important thing is number of hidden neurons. And maybe number of hidden layers and training parameters like number of epochs or so. Sorry for not providing enough info, i'm still learning about this.

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  • windows I/O manager - IRP's classification in read-like and write-like

    - by clyfe
    I am writing a windows filesystem minifilter driver that must fail IRP's in a preoperation callback. How can I find out from the callback parameters if the operation is read-like ( only reads data ) or it's write-like ( modifies data on the disk - write, delete etc ) ? I'm thinking on: Data->Iopb->TargetFileObject->ReadAccess Data->Iopb->TargetFileObject->WriteAccess But I'm not sure, I think thees are available only in postoperation callback. The documentation is really cumbersome. Code sample: FLT_PREOP_CALLBACK_STATUS Fail ( __inout PFLT_CALLBACK_DATA Data, __in PCFLT_RELATED_OBJECTS FltObjects, __deref_out_opt PVOID *CompletionContext ) { FLT_PREOP_CALLBACK_STATUS status = FLT_PREOP_SUCCESS_NO_CALLBACK; if ( IS WRITE_LIKE(Data, FltObjects) ) { // ??? HOW DO I FIND OUT???? if( FLT_IS_FASTIO_OPERATION(Data) ){ status = FLT_PREOP_DISALLOW_FASTIO; } else { status = FLT_PREOP_COMPLETE; } Data->IoStatus.Status = STATUS_ACCESS_DENIED; Data->IoStatus.Information = 0; return status; } return status; }

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  • Actionscript: Why is drawRoundRectComplex() not documented?

    - by Chunk1978
    in studying actionscript 3's graphics class, i've come across the undocumented drawRoundRectComplex() method. it's a variant of drawRoundRect() but with 8 parameters, the final four being the diameter of each corner (x, y, width, height, top left, top right, bottom left, bottom right). //example var sp:Sprite = new Sprite(); sp.graphics.lineStyle(1, 0x000000); sp.graphics.drawRoundRectComplex(0, 0, 100, 50, 10, 20, 0, 10); addChild(sp); this seems to be a pretty useful method, so i'm just curious if anyone knows of any reasons why adobe chose not to document it?

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  • Launch Reporting Services Reports from .Net Code

    - by Jeff
    What is the best way to launch reporting services reports from .Net code? One method would be to dynamically build a URL and launch a browser. Something like this: http://server/ReportServer/Pages/ReportViewer.aspx?%2fReport+Directory%2fReport%20Name&FirstParameter=1,2,3&SecondParameter=8/30/2009&rs%3aCommand=Render I don't like how it creates a dependency on the specific URL--especially report parameters which are very likely to change. Is there a better way? The reports I want to link to are in several reporting services projects hosted on one (eventually two) servers.

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  • ASP.NET AjaxControlToolkit change Combobox content dynamically per Ajax

    - by Ulli
    If I understand it right the new ACT ComboBox Control is Bound once to a given Datasource. But the count of the records I want to bind is very large. So I want to load the content of the ComboBox List via Ajax after the user typed in a few charachters. So at page load the combobox list should be empty and if something is typed in the list is loaded with the typed text as search text. I tried this: <asp:ComboBox ID="cbxCompany" DropDownStyle="DropDownList" runat="server" AutoCompleteMode="Append" /> Protected Sub cbxCompany_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles cbxCompany.TextChanged Dim dt As DataTable = GetCompanies(cbxCompany.Text) cbxCompany.DataSource = dt cbxCompany.DataTextField = "nameout" cbxCompany.DataValueField = "cid" cbxCompany.DataBind() End Sub GetCompanies is my method for getting data from the database, the parameters filters the select statement. But this doesn't work. Is there a way to reload the combobox content per Ajax?

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  • Setting the initial value of a property when using DataContractSerializer

    - by Eric
    If I am serializing and later deserializing a class using DataContractSerializer how can I control the initial values of properties that were not serialized? Consider the Person class below. Its data contract is set to serialize the FirstName and LastName properties but not the IsNew property. I want IsNew to initialize to TRUE whether a new Person is being instantiate as a new instance or being deserialized from a file. This is easy to do through the constructor, but as I understand it DataContractSerializer does not call the constructor as they could require parameters. [DataContract(Name="Person")] public class Person { [DataMember(Name="FirstName")] public string FirstName { get; set; } [DataMember(Name = "LastName")] public string LastName { get; set; } public bool IsNew { get; set; } public Person(string first, string last) { this.FirstName = first; this.LastName = last; this.IsNew = true; } }

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  • Calling a COM+ Component remotely using C#

    - by Arturo Caballero
    Hello, I have a little COM+ component as a service on a remote server. I´m trying to execute a method of this component using: Type type = Type.GetTypeFromProgID("ComPlusTest.ComTestClass",serverName); // Create Service Object service = Activator.CreateInstance(type); // Execute Method String result = service.GetType().InvokeMember("LaunchPackage", BindingFlags.InvokeMethod, null, parameters, null).ToString(); The type is returned as null. What is the best way to do this?? The server is Windows 2003 Enterprise, the service is a .NET component wraped as COM+ (I know that I don´t have to do it that way, but the purpose is to itegrate a legacy App with a .NET component) The purpose of this is just to test that the .NET COM+ Component works. Thanks in advance!

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  • How do views reduce code duplication?

    - by Debuger
    Hi! I read something like this about db views: Views are incredibly powerful and useful for one reason that stands out above all the other very good reasons. They reduce code duplication. That is, in most cases, the bottom line. If a query will be used in three or more places, then a view will drastically simplify your changes if the schema or query parameters change. I once had to edit 22 stored procedures to change some query logic. If the original architecture had utilized views, then I would have had only three changes. Can anyone explain to me how it works, and maybe give me some examples? Best regards!

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  • How to control a NSView, located in a dedicated NSWindow, from the main NSWindow designed to support

    - by Michael
    Hi, This is probably a simple problem for the high skilled Cocoa programmers, but I can't find how to control the graph in a separate window. I read carefully the Cocoa related books, go through many web notes,but I can't find a solution to my problem. The purpose is to use a dedicated window to draw the I=F(Vg) curves extracted by the GUI from a specific hardware. All the GUI and the hardware works fine ( thanks to the help provided by several members of stackoverflow) , but no way to send the parameters to the NSView to display the results. So far, the GUI class is based on a NSObject, the graphic class is NSView. Any idea, examples, links will be appreciated. Thank you so much. Michael

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  • manipulating strings, search text

    - by alhambraeidos
    Hi all, I try explain my issue: note 1: I have only strings, not files, ONLY strings. I have a string like this (NOTE: I include line numbers for better explain) The line separator is \r\n (CRLF) string allText = 1 Lorem ipsum Lorem ipsum 2 == START 001partXXX.sql == 3 Lorem ipsum TEXT Lorem ipsum 4 == END 001partXXX.sql == 5 Lorem ipsum TEXT Lorem ipsum 6 == START 002partzzz.sql == 7 Lorem ipsum TEXT Lorem ipsum 8 == END 002partzzz.sql == I have contents strings like this: string contents1 = == START 001partXXX.sql == Lorem ipsum TEXT Lorem ipsum == END 001partXXX.sql == the other content string: string contents2 = == START 002partzzz.sql == Lorem ipsum TEXT Lorem ipsum == END 002partzzz.sql == Then, allText.IndexOf(contents1) != -1 allText.IndexOf(contents2) != -1 I need function thats receive 3 parameters: allText, Contents, and text to find in contents, and it returns the line number of Text To Find in AllText For example, input: allText, contents2, "TEXT" ouput = line number 7 Another sample, input: allText, contents1, "TEXT" ouput = line number 3 Another sample, input: allText, contents1, "TEXT NOT FOUND" ouput = line number -1 How can I implement this function ?? any help very useful for me, Thanks in advanced.

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