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• Default Values Specflow Step Definitions

  - by Gavin Osborn

  I'm starting out in the world of SpecFlow and I have come across my first problem. In terms of keeping my code DRY I'd like to do the following: Have two scenarios: Given I am on a product page And myfield equals todays date Then... Given I am on a product page And myfield equals todays date plus 4 days Then... I was hoping to use the following Step Definition to cover both variants of my And clause: [Given(@"myfield equals todays date(?: (plus|minus) (\d+) days)?")] public void MyfieldEqualsTodaysDate(string direction, int? days) { //do stuff } However I keep getting exceptions when SpecFlow tries to parse the int? param. I've checked the regular expression and it definitely parses the scenario as expected. I'm aware that I could so something as crude as method overloading etc, I was just wondering if SpecFlow supported the idea of default parameter values, or indeed another way to achieve the same effect. Many Thanks

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• how to prevent myControl.g.cs from overwriting with wrong base class

  - by Jonny Cundall

  I've got two custom cursors for my app, MyCursor and MyOtherCursor, both of which were designed in xaml, and I added some behaviour in the xaml.cs for each of them. This behaviour was the same for both so I had them inherit from a base class to reduce code duplication. public partial class myCursor: CursorBase { public InterchangeCursor() { InitializeComponent(); } } public class CursorBase : UserControl { public virtual void MoveTo(Point pt) { this.SetValue(Canvas.LeftProperty, pt.X); this.SetValue(Canvas.TopProperty, pt.Y); } } my problem is that if I change something in the xaml for MyCursor, the MyCursor.g.cs file is regenerated, and instead of inheriting from CursorBase, the partial class in the g.cs inherits from System.Windows.Controls.UserControl. Since the other side of the partial class in the xaml.cs file still inherits CursorBase, a build error occurs. I'm finding it annoying fixing the g.cs file each time. Does anyone know how to prevent this happening?

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• Find host from ItemContainerGenerator.itemChanged Event

  - by Mohanavel

  I'm working on C# 4.0, WPF. I have three ListView, and all three control have the same ItemContainerGenerator_ItemsChanged" event. So my problem is, when ever the event triggered, i have to find the host. lst1.ItemContainerGenerator.ItemsChanged += new System.Windows.Controls.Primitives.ItemsChangedEventHandler(ItemContainerGenerator_ItemsChanged); lst2.ItemContainerGenerator.ItemsChanged += new System.Windows.Controls.Primitives.ItemsChangedEventHandler(ItemContainerGenerator_ItemsChanged); lst3.ItemContainerGenerator.ItemsChanged += new System.Windows.Controls.Primitives.ItemsChangedEventHandler(ItemContainerGenerator_ItemsChanged); void ItemContainerGenerator_ItemsChanged(object sender, System.Windows.Controls.Primitives.ItemsChangedEventArgs e) { //TODO: Find host and proceed. **REAL Problem** // ListViewItem's Visible property has been set based on the deletion button click, // So at one place i have to get the count of rows which are visible and proceed // with related buttons enable/disable operation. }

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• mocking static method call to c# library class

  - by Joe

  This seems like an easy enough issue but I can't seem to find the keywords to effect my searches. I'm trying to unit test by mocking out all objects within this method call. I am able to do so to all of my own creations except for this one: public void MyFunc(MyVarClass myVar) { Image picture; ... picture = Image.FromStream(new MemoryStream(myVar.ImageStream)); ... } FromStream is a static call from the Image class (part of c#). So how can I refactor my code to mock this out because I really don't want to provide a image stream to the unit test.

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• .NET 2.0: Invoking Methods Using Reflection And Generics Causes Exception

  - by David Derringer

  Hi all, I'm new to Stack Overflow, so forgive me. I've just started transititoning over to C# and I am stuck on a problem. I am wanting to pass a generic class in and call a method from that class. So, my code looks as such: public void UpdateRecords<T>(T sender) where T : new() //where T: new() came from Resharper { Type foo = Type.GetType(sender.GetType().ToString()); object[] userParameters = new object[2]; userParameters[0] = x; userParameters[1] = y; sender = new T(); //This was to see if I could solve my exception problem MethodInfo populateRecord = foo.GetMethod("MethodInOtherClass"); populateMethod.Invoke(sender, userParameters); } Exception thrown: "Object reference not set to an instance of an object." Again, I really apologize, as I am nearly brand new to C# and this is the first time I've ever handled reflection and generics. Thank you!

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• Count down timer

  - by Ohmnastrum

  I have a timer set up and it gets called when ever the player is in their turn phase. I also have a multiplier that decrements slowly while the player is committing actions. for some odd reason my mult variable is returning garbage values I initialized it to 1 in the onLoad statement but it still seems to have trouble. -(void) Timerbar:(NSTimer *)barTimer { if(!waitForPlayer) { [barTimer invalidate]; } if(mult > 0.0) { mult -= 0.01; if(mult < 0) { mult = 0; } } power = (mult * 10) / pwrBarMaxWidth; pwrBarWidth = (int)power % limit; NSLog(@"%d", mult); } Do I have a syntax error somewhere?

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• Passing variable string to create arrays (Android)

  - by dweebsonduty

  Hello all, I am a newb to Android and Java and want to write a funtion that will display a list based on a varable that I pass to the function. The function is below and the code below creates an array out of a string called type, but what I want to do is pass it a variable string and have it build a list based on that string. So if I wanted the type list I would say list_it("type") But if I try something like getResources().getStringArray(R.array.thelist); it doesn't work. Can someone point me in the right direction? public void list_it(String thelist){ String[] types = getResources().getStringArray(R.array.type); ArrayAdapter<String> mAdapter = new ArrayAdapter<String>(this, R.layout.list_item1, types); setListAdapter(mAdapter); ListView lv = getListView(); lv.setTextFilterEnabled(true); }

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• Why pass by const reference instead of by value?

  - by Maulrus

  From what I understand: when you pass by value, the function makes a local copy of the passed argument and uses that; when the function ends, it goes out of scope. When you pass by const reference, the function uses a reference to the passed argument that can't be modified. I don't understand, however, why one would choose one over the other, except in a situation where an argument needs to be modified and returned. If you had a void function where nothing is getting returned, why choose one over the other?

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• Can we send an two dimensional array as input for a function in Objective C.

  - by srikanth rongali

  I have data stored in two dimensional array. I want it to send in to a function in this way, I have written the following in another class. // do if( array[iTemp][1] != 10 ) { Enemy *enemyXX = [[Enemy alloc] init]; [enemyXX EnemyXXTarget: array[iTemp][1]]; iTemp++; }while( iTemp != 9); // -(void)EnemyXXTarget:(id)sender; is function declared in Enemy class. But is giving me an error error: incompatible type for argument 1 of 'EnemyXXTarget:' Where I am wrong ? Please help me. Thank You.

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• VST plugin : using FFT on audio input buffer with arbitrary size, how ?

  - by Led

  I'm getting interested in programming a VST plugin, and I have a basic knowledge of audio dsp's and FFT's. I'd like to use VST.Net, and I'm wondering how to implement an FFT-based effect. The process-code looks like public override void Process(VstAudioBuffer[] inChannels, VstAudioBuffer[] outChannels) If I'm correct, normally the FFT would be applied on the input, some processing would be done on the FFT'd data, and then an inverse-FFT would create the processed soundbuffer. But since the FFT works on a specified buffersize that will most probably be different then the (arbitrary) amount of input/output-samples, how would you handle this ?

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• drop down list checked

  - by KareemSaad

  I had Drop down list which execute code when specific condition and I tried to check it through selected value but it get error protected void DDLProductFamily_SelectedIndexChanged(object sender, EventArgs e) { if (DDLProductFamily.Items.FindByText("Name").Selected == true) using (SqlConnection Con = Connection.GetConnection()) { SqlCommand Com = new SqlCommand("GetListViewByProductCategory", Con); Com.CommandType = CommandType.StoredProcedure; Com.Parameters.Add(Parameter.NewInt("@ProductCategory_Id", DDLProductFamily.SelectedValue.ToString())); SqlDataAdapter DA = new SqlDataAdapter(Com); DA.Fill(dt); DataList1.DataSource = dt; DataList1.DataBind(); } else if (DDLProductFamily.Items.FindByText("ProductFamilly").Selected == true) { using (SqlConnection Con = Connection.GetConnection()) { SqlCommand Com = new SqlCommand("GetListViewByProductFamily", Con); Com.CommandType = CommandType.StoredProcedure; Com.Parameters.Add(Parameter.NewInt("@ProductFamily_Id", DDLProductFamily.SelectedValue.ToString())); SqlDataAdapter DA = new SqlDataAdapter(Com); DA.Fill(dt); DataList1.DataSource = dt; DataList1.DataBind(); } } }

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• Android's listview. Update view within of of the cells just after invalidating Activity's view

  - by davs

  I have ListViewActivity public class SelectActivity extends ListActivity { protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.select_one_of); SimpleAdapter adapter = new SimpleAdapter( this, createChildList(), R.layout.select_one_of_childrow, new String[] { KEY_VALUE }, new int[] { R.id.selectoneof_add_new_item}); setListAdapter(adapter); } // ... } after setListAdapter() calls I would like to execute the following code: ((TextView) getListView().getChildAt(0).findViewById(R.id.selectoneof_add_new_item)).setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ticked, 0); but getListView().getChildAt(xxx) returns null and I catch NullPointerException. Where should I put mentioned above code-snippet?

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• Don't Change URL in Browser When Clicking <asp:LinkButton>

  - by Corey Goldberg

  I have an ASP.NET page that uses a menu based on asp:LinkButton control in a Master page. When a user selects a menu item, an onclick handler calls a method in my C# code. The method it calls just does a Server.Transfer() to a new page. From what I have read, this is not supposed to change the URL displayed in the browser. The problem is it that the URL changes in the browser as the user navigates the menu to different pages. Here is an item in the menu: <asp:LinkButton id="foo" runat="server" onclick="changeToHelp"><span>Help</span> </asp:LinkButton> In my C# code, I handle the event with a method like: protected void changeToHelp(object sender, EventArgs e) { Server.Transfer("Help.aspx"); } Any ideas how I can navigate through the menu without the browser's URL bar changing?

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• Problem with loading compiled c code in R x64 using dyn.load

  - by Sacha Epskamp

  I recently went from a 32bit laptop to a 64bit desktop (both win7). I just found out that I get an error now when loading dll's using dyn.load. I guess this is a simple mistake and I am overlooking something. For example, I write this simple c function (foo.c): void foo( int *x) {*x = *x + 1;} Then compile it in command prompt: R CMD SHLIB foo.c Then in 32bit R I can use it in R: > setwd("R") > dyn.load("foo.dll") > .C("foo",as.integer(1)) [[1]] [1] 2 but in 64bit R I get: > dyn.load("foo.dll") Error in inDL(x, as.logical(local), as.logical(now), ...) : unable to load shared object 'C:/Users/Sacha/Documents/R/foo.dll': LoadLibrary failure: %1 is not a valid Win32 application. nd.

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• How to pause the timer in c#?

  - by Jay

  I have a timer in my code and the interval is 10s When the timer elapsed, I will do some checking, and it may takes more than 10s for checking and some update jobs. However, if I didn't stop the timer, seems the checking will execute every 10s ... If I call the stop(), seems the timer cannot be start again ... ie something like: protected void timer_elapsed(object sender, EventArgs args) { __timer.Stop(); //Some checking here more than 10s __timer.Start(); } I just want another 10s to check again after the before checking is done. anyone can help?

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• Trying to start a service on boot on Android

  - by Alex

  I've been trying to start a service when a device boots up on android, but I cannot get it to work. I've looked a number of links online but none of the code is working. Am I forgetting something? This is my code. Manifest <receiver android:name=".StartServiceAtBootReceiver" android:enabled="true" android:exported="false" android:label="StartServiceAtBootReceiver"> <intent-filter> <action android:name="android.intent.action._BOOT_COMPLETED"/> </intent-filter> </receiver> <service android:enabled="true" android:name="com.test.RunService"/> Receiver OnReceive public void onReceive(Context context, Intent intent) { if("android.intent.action.BOOT_COMPLETED".equals(intent.getAction())) { Intent serviceLauncher = new Intent(context, RunService.class); context.startService(serviceLauncher); Log.v("TEST", "Service loaded at start"); } } Thanks,

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• bitfield mask calculation macro

  - by Aidan Cully

  We have a set of C macros, here, for using the preprocessor to do bitfield operations, and we run into warnings when attempting to use these macros in visual studio. The problem can be demonstrated very easily: #define BITFIELD_WIDTHMASK(Width) \ ((Width) >= 32 ? ~0x0ul : (1ul << (Width)) - 1) unsigned long foo(void) { return BITFIELD_WIDTHMASK(32); } Compiling this with MSVC yields the warning: test.c(12) : warning C4293: '<<' : shift count negative or too big, undefined behavior This isn't a behavior problem - the << operator won't be used in this case, and that should be detected at compile time. But does anyone have any suggestions about how to rewrite the macro to avoid the warning? Or, failing that, how to redesign the macro interface for this? Thanks in advance

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• Why the output for "a" is -80?

  - by Abhi

  #include<stdio.h> #include<conio.h> #define ABC 20 #define XYZ 10 #define XXX ABC - XYZ void main() { int a; a = XXX * 10; printf("\n %d \n", a); getch(); } I thought the output should be 100 but when i saw the result i found o/p as -80. when i put bracket as #define XXX (ABC-XYZ) then i get output as 100 but without bracket i get o/p as -80.

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• Stopping looping thread in Java

  - by halfwarp

  I'm using a thread that is continuously reading from a queue. Something like: public void run() { Object obj; while(true) { synchronized(objectsQueue) { if(objectesQueue.isEmpty()) { try { objectesQueue.wait(); } catch (InterruptedException e) { e.printStackTrace(); } obj = objectesQueue.poll(); } } // Do something with the Object obj } } What is the best way to stop this thread? I see two options: 1 - Since Thread.stop() is deprecated, I can implement a stopThisThread() method that uses a n atomic check-condition variable. 2 - Send a Death Event object or something like that to the queue. When the thread fetches a death event it exists. I prefer the 1st way, however, I don't know when to call the stopThisThread() method, as something might be on it's way to the queue and the stop signal can arrive first (not desirable). Any suggestions?

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• Connection Pooling

  - by cshah

  I have the following code, If I use conn == null in finally do I still use connection pooling? I know it is a good practice to close your connection but how about disposing the whole connection object? public void ExecuteNonQuery(SqlCommand Cmd) { //========== Connection ==========// SqlConnection Conn = new SqlConnection(strConStr); try { //========== Open Connection ==========// Conn.Open(); //========== Execute Command ==========// Cmd.Connection = Conn; Cmd.CommandTimeout = 180; Cmd.ExecuteNonQuery(); } catch (Exception Exc) { throw Exc; } finally { //======== Closing Connection ========// if (Conn.State == ConnectionState.Open) { Conn.Close(); } //======== Disposing object ========// Conn = null; } }

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• VB.NET generates properties in the release build

  - by dattebayo

  I have a form and i drag and drop a control in VB.NET. I have a line say, private WithEvents radioButton RadioButton Also, I have a handler like, private void click(.....) Handles radioButton.Click { ... } Now, When I build this is .NET 3.5 in release mode, and see the generated code in reflector tool, the code is something like, Private Overridable Property radioButton As RadioButton . . . <AccessedThroughProperty("radioButton")> _ Private _radioButton As RadioButton Can someone tell me what is going on here? And how do I avoid the generation of new properties and fields? -datte

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• another approach to returning some thing to browser in mvc with ajax call instead of using response.

  - by Sadegh

  hi, i have one section in my mvc 2.0 project which doing some processes and after each, return some messages (string) with response.write(). and this messages returned to browser with bad format. i want to return messages to one specific HTML div and add each to end of contents of div tag. now how do this? this event after each procces raised and message returned to browser. public void OnProgressEvent(System.Object source, CustomEventArgs customEventArgs) { if (customEventArgs.Level > 5) { Response.Write(customEventArgs.Message + "<br />"); Response.Flush(); } }

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• LinkButton child controls render

  - by Alex

  Hi. I want to have a LinkButton that adds 'span' tag around the text. protected override void Render(HtmlTextWriter writer) { Text = String.Concat("<span>", Text, "</span>"); base.Render(writer); } It's works perfectly, but only if I add text like this: <cc:TestLinkButton ID="TestLinkButton" runat="server" Text="SomeText"> </cc:TestLinkButton> If I want to add some image I will write something like this: <cc:TestLinkButton ID="LinkButton1" runat="server"> <asp:Image ID="Image1" runat="server" ImageUrl="~/Images/icon_holiday.png" BorderWidth="0" /> SomeText </cc:TestLinkButton> In this case Text property will be empty, because actualy "SomeText" is child control property. So question is is how to add tag around child controls.

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• C++ template parameter/class ambiguity

  - by aaa

  hello. while testing with different version of g++, the following problem came up template<class bra> struct Transform<bra, void> : kernel::Eri::Transform::bra { static const size_t ni = bra::A::size; bra::A is interpreted as kernel::Eri::Transform::bra::A, rather than template argument by g++ 4.1.2. on the other hand, g++ 4.3 gets it right. what should be correct behavior according to standard? Meanwhile, I refactor slightly to make problem go away.

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• Can we have an anonymous struct as template argument?

  - by nonoitall

  The title is pretty self-explanatory, but here's a simplified example: #include <cstdio> template <typename T> struct MyTemplate { T member; void printMemberSize() { printf("%i\n", sizeof(T)); } }; int main() { MyTemplate<struct { int a; int b; }> t; // <-- compiler doesn't like this t.printMemberSize(); return 0; } The compiler complains when I try to use an anonymous struct as a template argument. What's the best way to achieve something like this without having to have a separate, named struct definition?

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