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  • .NET MVC custom routing with empty parameters

    - by user135498
    Hi All, I have a .net mvc with the following routes: routes.Add(new Route( "Lookups/{searchtype}/{inputtype}/{firstname}/{middlename}/{lastname}/{city}/{state}/{address}", new RouteValueDictionary( new { controller = "Lookups", action = "Search", firstname = (string)null, middlename = (string)null, lastname = (string)null, city = (string)null, state = (string)null, address = (string)null, SearchType = SearchType.PeopleSearch, InputType = InputType.Name }), new MvcRouteHandler()) ); routes.Add(new Route( "Lookups/{searchtype}/{inputtype}", new RouteValueDictionary( new { controller = "Lookups", action = "Search", firstname = "", middlename = "", lastname = "", city = "", state = "", address = "" }), new MvcRouteHandler()) ); routes.Add(new Route( "Lookups/{searchtype}/{inputtype}", new RouteValueDictionary( new { controller = "Lookups", action = "Search", firstname = "", middlename = "", lastname = "", city = "", state = "", address = "", SearchType = SearchType.PeopleSearch, InputType = InputType.Name }), new MvcRouteHandler()) ); routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "Account", action = "LogOn", id = "" } // Parameter defaults ); The following request works fine: http://localhost:2608/Lookups/PeopleSearch/Name/john/w/smith/seattle/wa/123 main This request does not work: http://localhost:2608/Lookups/PeopleSearch/Name/john//smith//wa/ Not all requests will have all paramters and I would like empty parameters to be passed to the method as empty string or null. Where am I going wrong? The method: public ActionResult Search(string firstname, string middlename, string lastname, string city, string state, string address, SearchType searchtype, InputType inputtype) { SearchRequest r = new SearchRequest { Firstname = firstname, Middlename = middlename, Lastname = lastname, City = city, State = state, Address = address, SearchType = searchtype, InputType = inputtype }; return View(r); }

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  • getView only shows Flagged Backgrounds for drawn Views, It does not show Flagged Background when scroll to view more items on list

    - by Leoa
    I am trying to create a listview that receives a flagged list of items to indicate a status to the user. I have been able to create the flag display by using a yellow background (see image at bottom). In Theory, the flagged list can have many flagged items in it. However in my app, only the first three flagged backgrounds are shown. I believe this is because they are initially drawn to the screen. The Flagged background that are not drawn initially to the screen do not show. I'd like to know how to get the remaining flags to show in the list. ListView Recycling: The backgrounds in the listView are being recycled in getView(). This recycling goes from position 0 to position 9. I have flags that need to match at positions 13, 14 and so on. Those positions are not being displayed. listView.getCheckedItemPositions() for multiple selections: This method will not work in my case because the user will not selected the flags. The flags are coming from the server. setNotifyOnChange() and/or public virtual void SetNotifyOnChange (bool notifyOnChange): I'm not adding new data to the list, so I don't see how this method would work for my program. Does this method communicate to getview when it is recycling data? I was unable to find an answer to this in my research. public void registerDataSetObserver: This may be overkill for my problem, but is it possible to have an observer object that keeps track of the all the positions in my items list and in my flag list no matter if the view is recycled and match them on the screen? Code: package com.convention.notification.app; import java.util.Iterator; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.content.Context; import android.graphics.Color; import android.os.Bundle; import android.text.Html; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.ViewParent; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.TextView; public class NewsRowAdapter extends ArrayAdapter<Item> { private Activity activity; private List<Item> items; private Item objBean; private int row; private List<Integer> disable; View view ; int disableView; public NewsRowAdapter(Activity act, int resource, List<Item> arrayList, List<Integer> disableList) { super(act, resource, arrayList); this.activity = act; this.row = resource; this.items = arrayList; this.disable=disableList; System.out.println("results of delete list a:"+disable.toString()); } public int getCount() { return items.size(); } public Item getItem(int position) { return items.get(position); } public long getItemId(int position) { return position; } @Override public int getItemViewType(int position) { for(int k =0;k < disable.size();k++){ if(position==disable.get(k)){ //System.out.println( "is "+position+" value of disable "+disable.get(k)); disableView=disable.get(k); //AdapterView.getItemAtPosition(position); } } return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { View view = convertView; ViewHolder holder; if (view == null) { LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); view = inflater.inflate(row, null); getItemViewType(position); long id=getItemId(position); if(position==disableView){ view.setBackgroundColor(Color.YELLOW); System.out.println(" background set to yellow at position "+position +" disableView is at "+disableView); }else{ view.setBackgroundColor(Color.WHITE); System.out.println(" background set to white at position "+position +" disableView is at "+disableView); } //ViewHolder is a custom class that gets TextViews by name: tvName, tvCity, tvBDate, tvGender, tvAge; holder = new ViewHolder(); /* setTag Sets the tag associated with this view. A tag can be used to * mark a view in its hierarchy and does not have to be unique * within the hierarchy. Tags can also be used to store data within * a view without resorting to another data structure. */ view.setTag(holder); } else { //the Object stored in this view as a tag holder = (ViewHolder) view.getTag(); } if ((items == null) || ((position + 1) > items.size())) return view; objBean = items.get(position); holder.tv_event_name = (TextView) view.findViewById(R.id.tv_event_name); holder.tv_event_date = (TextView) view.findViewById(R.id.tv_event_date); holder.tv_event_start = (TextView) view.findViewById(R.id.tv_event_start); holder.tv_event_end = (TextView) view.findViewById(R.id.tv_event_end); holder.tv_event_location = (TextView) view.findViewById(R.id.tv_event_location); if (holder.tv_event_name != null && null != objBean.getName() && objBean.getName().trim().length() > 0) { holder.tv_event_name.setText(Html.fromHtml(objBean.getName())); } if (holder.tv_event_date != null && null != objBean.getDate() && objBean.getDate().trim().length() > 0) { holder.tv_event_date.setText(Html.fromHtml(objBean.getDate())); } if (holder.tv_event_start != null && null != objBean.getStartTime() && objBean.getStartTime().trim().length() > 0) { holder.tv_event_start.setText(Html.fromHtml(objBean.getStartTime())); } if (holder.tv_event_end != null && null != objBean.getEndTime() && objBean.getEndTime().trim().length() > 0) { holder.tv_event_end.setText(Html.fromHtml(objBean.getEndTime())); } if (holder.tv_event_location != null && null != objBean.getLocation () && objBean.getLocation ().trim().length() > 0) { holder.tv_event_location.setText(Html.fromHtml(objBean.getLocation ())); } return view; } public class ViewHolder { public TextView tv_event_name, tv_event_date, tv_event_start, tv_event_end, tv_event_location /*tv_event_delete_flag*/; } } Logcat: 06-12 20:54:12.058: I/System.out(493): item disalbed is at postion :0 06-12 20:54:12.058: I/System.out(493): item disalbed is at postion :4 06-12 20:54:12.069: I/System.out(493): item disalbed is at postion :5 06-12 20:54:12.069: I/System.out(493): item disalbed is at postion :13 06-12 20:54:12.069: I/System.out(493): item disalbed is at postion :14 06-12 20:54:12.069: I/System.out(493): item disalbed is at postion :17 06-12 20:54:12.069: I/System.out(493): results of delete list :[0, 4, 5, 13, 14, 17] 06-12 20:54:12.069: I/System.out(493): results of delete list a:[0, 4, 5, 13, 14, 17] 06-12 20:54:12.069: I/System.out(493): set adapaer to list view called; 06-12 20:54:12.128: I/System.out(493): background set to yellow at position 0 disableView is at 0 06-12 20:54:12.628: I/System.out(493): background set to white at position 1 disableView is at 0 06-12 20:54:12.678: I/System.out(493): background set to white at position 2 disableView is at 0 06-12 20:54:12.708: I/System.out(493): background set to white at position 3 disableView is at 0 06-12 20:54:12.738: I/System.out(493): background set to yellow at position 4 disableView is at 4 06-12 20:54:12.778: I/System.out(493): background set to yellow at position 5 disableView is at 5 06-12 20:54:12.808: I/System.out(493): background set to white at position 6 disableView is at 5 06-12 20:54:12.838: I/System.out(493): background set to white at position 7 disableView is at 5 This is a link to my first question a day ago: Change Background on a specific row based on a condition in Custom Adapter I appreciate your help!

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  • function objects versus function pointers

    - by kumar_m_kiran
    Hi All, I have two questions related to function objects and function pointers, Question : 1 When I read the different uses sort algorithm of STL, I see that the third parameter can be a function objects, below is an example class State { public: //... int population() const; float aveTempF() const; //... }; struct PopLess : public std::binary_function<State,State,bool> { bool operator ()( const State &a, const State &b ) const { return popLess( a, b ); } }; sort( union, union+50, PopLess() ); Question : Now, How does the statement, sort(union, union+50,PopLess()) work? PopLess() must be resolved into something like PopLess tempObject.operator() which would be same as executing the operator () function on a temporary object. I see this as, passing the return value of overloaded operation i.e bool (as in my example) to sort algorithm. So then, How does sort function resolve the third parameter in this case? Question : 2 Question Do we derive any particular advantage of using function objects versus function pointer? If we use below function pointer will it derive any disavantage? inline bool popLess( const State &a, const State &b ) { return a.population() < b.population(); } std::sort( union, union+50, popLess ); // sort by population PS : Both the above references(including example) are from book "C++ Common Knowledge: Essential Intermediate Programming" by "Stephen C. Dewhurst". I was unable to decode the topic content, thus have posted for help. Thanks in advance for your help.

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  • SQL Server 2008 - Keyword search using table Join

    - by Aaron Wagner
    Ok, I created a Stored Procedure that, among other things, is searching 5 columns for a particular keyword. To accomplish this, I have the keywords parameter being split out by a function and returned as a table. Then I do a Left Join on that table, using a LIKE constraint. So, I had this working beautifully, and then all of the sudden it stops working. Now it is returning every row, instead of just the rows it needs. The other caveat, is that if the keyword parameter is empty, it should ignore it. Given what's below, is there A) a glaring mistake, or B) a more efficient way to approach this? Here is what I have currently: ALTER PROCEDURE [dbo].[usp_getOppsPaged] @startRowIndex int, @maximumRows int, @city varchar(100) = NULL, @state char(2) = NULL, @zip varchar(10) = NULL, @classification varchar(15) = NULL, @startDateMin date = NULL, @startDateMax date = NULL, @endDateMin date = NULL, @endDateMax date = NULL, @keywords varchar(400) = NULL AS BEGIN SET NOCOUNT ON; ;WITH Results_CTE AS ( SELECT opportunities.*, organizations.*, departments.dept_name, departments.dept_address, departments.dept_building_name, departments.dept_suite_num, departments.dept_city, departments.dept_state, departments.dept_zip, departments.dept_international_address, departments.dept_phone, departments.dept_website, departments.dept_gen_list, ROW_NUMBER() OVER (ORDER BY opp_id) AS RowNum FROM opportunities JOIN departments ON opportunities.dept_id = departments.dept_id JOIN organizations ON departments.org_id=organizations.org_id LEFT JOIN Split(',',@keywords) AS kw ON (title LIKE '%'+kw.s+'%' OR [description] LIKE '%'+kw.s+'%' OR tasks LIKE '%'+kw.s+'%' OR requirements LIKE '%'+kw.s+'%' OR comments LIKE '%'+kw.s+'%') WHERE ( (@city IS NOT NULL AND (city LIKE '%'+@city+'%' OR dept_city LIKE '%'+@city+'%' OR org_city LIKE '%'+@city+'%')) OR (@state IS NOT NULL AND ([state] = @state OR dept_state = @state OR org_state = @state)) OR (@zip IS NOT NULL AND (zip = @zip OR dept_zip = @zip OR org_zip = @zip)) OR (@classification IS NOT NULL AND (classification LIKE '%'+@classification+'%')) OR ((@startDateMin IS NOT NULL AND @startDateMax IS NOT NULL) AND ([start_date] BETWEEN @startDateMin AND @startDateMax)) OR ((@endDateMin IS NOT NULL AND @endDateMax IS NOT NULL) AND ([end_date] BETWEEN @endDateMin AND @endDateMax)) OR ( (@city IS NULL AND @state IS NULL AND @zip IS NULL AND @classification IS NULL AND @startDateMin IS NULL AND @startDateMax IS NULL AND @endDateMin IS NULL AND @endDateMin IS NULL) ) ) ) SELECT * FROM Results_CTE WHERE RowNum >= @startRowIndex AND RowNum < @startRowIndex + @maximumRows; END

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  • What is the purpose of the s==NULL case for mbrtowc?

    - by R..
    mbrtowc is specified to handle a NULL pointer for the s (multibyte character pointer) argument as follows: If s is a null pointer, the mbrtowc() function shall be equivalent to the call: mbrtowc(NULL, "", 1, ps) In this case, the values of the arguments pwc and n are ignored. As far as I can tell, this usage is largely useless. If ps is not storing any partially-converted character, the call will simply return 0 with no side effects. If ps is storing a partially-converted character, then since '\0' is not valid as the next byte in a multibyte sequence ('\0' can only be a string terminator), the call will return (size_t)-1 with errno==EILSEQ. and leave ps in an undefined state. The intended usage seems to have been to reset the state variable, particularly when NULL is passed for ps and the internal state has been used, analogous to mbtowc's behavior with stateful encodings, but this is not specified anywhere as far as I can tell, and it conflicts with the semantics for mbrtowc's storage of partially-converted characters (if mbrtowc were to reset state when encountering a 0 byte after a potentially-valid initial subsequence, it would be unable to detect this dangerous invalid sequence). If mbrtowc were specified to reset the state variable only when s is NULL, but not when it points to a 0 byte, a desirable state-reset behavior would be possible, but such behavior would violate the standard as written. Is this a defect in the standard? As far as I can tell, there is absolutely no way to reset the internal state (used when ps is NULL) once an illegal sequence has been encountered, and thus no correct program can use mbrtowc with ps==NULL.

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  • How to change Hibernate´s auto persistance strategy

    - by Kristofer Borgstrom
    I just noted that my hibernate entities are automatically persisted to the database (or at least to cache) before I call any save() or update() method. To me this is a pretty strange default behavior but ok, as long as I can disable it, it´s fine. The problem I have is I want to update my entity´s state (from 1 to 2) only if the entity in the database still has the state it had when I retrieved [1] (this is to eliminate concurrency issues when another server is updating this same object). For this reason I have created a custom NamedQuery that will only update the entity if state is 1. So here is some pseudo-code: //Get the entity Entity item = dao.getEntity(); item.getState(); //==1 //Update the entity item.setState(2); //Here is the problem, this effectively changes the state of my entity braking my query that verifies that state is still == 1. dao.customUpdate(item); //Returns 0 rows changes since state != 1. So, how do I make sure the setters don´t change the state in cache/db? Thanks, Kristofer

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  • Linux Software RAID1 Rebuild Completes, but after reboot, its degraded again

    - by zimmy6996
    I have been beating my head with an issue here, and I'm now turning to the internet for help. I have a system running Mandrake Linux, with the following configuration: /dev/hda - This is a IDE drive. Has some partitions on it that boot the system and make up most of the file system. /dev/sda - This is drive 1 of 2 for a software raid /dev/md0 /dev/sdb - This is drive 2 of 2 for a software raid /dev/md0 md0 gets mounted but fstab as /data-storage, so it is not critical to the systems ability to boot. We can comment it out of fstab, and the system works just fine either way. The problem is, we have a failed sdb drive. So I shut the box down, and have pulled the failed disk and installed a new disk. When the system boots up, /proc/mdstat shows only sda as part of the raid. I then run the various command to rebuild the RAID to /dev/sdb. Everything rebuilds correctly, and upon completion, you look at /proc/mdstat and it shows 2 drives sda1(0) and sdb1(1). Everything looks great. Then you reboot the box ... UGH!!! Once rebooted, sdb is missing again from the RAID. It is like the rebuild never happened. I can walk through the commands to rebuild it again, and it will work, but again, after reboot, the box seems to make sdb just vanish! The real odd thing is, if after reboot, I pull sda out of the box, and try to get the system to load with the rebuilt sdb drive in the system, and when I do, the system actually throws and error just after grub, and says something about drive error, and the system has to shut down. Thoughts??? I'm starting to wonder if grub has something to do with this mess. That the drive isn't being setup within grub to be visible at boot? This RAID array isn't necessary for the system to boot, but when the replacement drive is in there, without SDA it won't boot system, so it makes me believe there is something to that. On top of that, there just seems to be something wonky here the drive falling off of RAID after reboot. I've hit the point of pounding my head on the keyboard. Any help would be greatly appreciated!!!

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  • Is there some sort of CacheDependency in System.Runtime.Caching?

    - by Venemo
    I heard that .NET 4 has a new caching API. Okay, so the good old System.Web.Caching.Cache (which is, by the way, still there in .NET 4) has the ability to set so-called CacheDependency objects to determine whether a cached item is expired or not. One can also specify custom logic for determining whether a cached item is still useable or not by deriving a custom subclass from CacheDependency. I'm curious, is there a way to provide such a logic in the new API?

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  • DataBinding: 'System.String' does not contain a property with the name 'dbMake'.

    - by marcmiki
    Hi , i am a newbie at ASP.net and after using sqldatasource with a listview to insert and show results from an SQL server db i want to try using the LINQ datasource since it seems to be more flexible in codebehind. My problem is this: i droped a listview control to the page and i created the Linq datasource in codebehind with vb. the issue that i am having when i ..Select d.columms name i get the error system.string does not contain a property with the name "columname".. if i ommit the column name then its works fine.. the funny part is the d.count works fine but after that i get the error.. please see my code below: vb code Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim rowsCount As Integer Dim showSearchForm As String showSearchForm = Request.QueryString("tab") If showSearchForm = "1" Then Dim db As New ASPNETDBDataContext() Dim q = From b In db.PassengerVehiclesTables Select b.dbMake rowsCount = q.Count MsgBox(rowsCount) lvMakes.DataSource = q lvMakes.DataBind() PnlPassengerVehiclesSearch.Visible = True ElseIf showSearchForm = "2" Then aspx code <asp:Panel ID="PnlPassengerVehiclesSearch" Visible="false" runat="server"> Search Passenger Vehicles Form.....<br /> <table style="width: 100%; border-style: solid; border-width: 1px"> <tr> <td> <asp:ListView ID="lvMakes" runat="server"> <LayoutTemplate> <asp:PlaceHolder runat="server" ID="itemPlaceholder" /> </LayoutTemplate> <ItemTemplate> <%#Eval("dbMake")%><br /> </ItemTemplate> </asp:ListView> </td> b.dbMake needs to work so that i can use Distinct ,, ia m using asp.net version:3.5 and IIS version 7.0 .. not sure what i am missing ,, but i did try alot of approaches,,1- checked the web.config file and it seems to have two assemblies and two namespaces for LINQ..2- used different databinding syntaxs,,and i searched a lot for the solution.. the last one i read the person ommited the name of the column,, i thought that wasnt the best solution.. also my dbMake column is comming up in the "intellisence" .. thank you in advance for your help..

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  • C# - Alternative to System.Timers.Timer, to call a function at a specific time.

    - by Fábio Antunes
    Hello everybody. I want to call a specific function on my C# application at a specific time. At first i thought about using a Timer (System.Time.Timer), but that soon became impossible to use. Why? Simple. The Timer Class requires a Interval in milliseconds, but considering that i might want the function to be executed, lets says in a week that would mean: 7 Days = 168 hours; 168 Hours = 10,080 minutes; 10,080 Minutes = 6,048,000 seconds; 6,048,000 Seconds = 6,048,000,000 milliseconds; So the Interval would be 6,048,000,000; Now lets remember that the Interval accepted data type is int, and as we know int range goes from -2,147,483,648 to 2,147,483,647. That makes Timer useless in this case once we cannot set a Interval bigger that 2,147,483,647 milliseconds. So i need a solution where i could specify when the function should be called. Something like this: solution.ExecuteAt = "30-04-2010 15:10:00"; solution.Function = "functionName"; solution.Start(); So when the System Time would reach "30-04-2010 15:10:00" the function would be executed in the application. How can this problem be solved? Thanks just by taking the time to read my question. But if you could provide me with some help i would be most grateful. Additional Info: What these functions will do? Getting climate information and based on that info: Starting / Shutting down other Applications (most of them Console Based); Sending custom Commands to those Console Applications; Power down, Rebooting, Sleep, Hibernate the computer; And if possible schedule the BIOS to Power Up the Computer; EDIT: It would seem that the Interval accepted data type is double, however if you set a value bigger that an int to the Interval, and call Start() it throws a exception [0, Int32.MaxValue]. EDIT 2: Jørn Schou-Rode suggested using Ncron to handle the scheduling tasks, and at first look this seems a good solution, but i would like to hear about some who as worked with it.

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  • How to read Hebrew text using System.IO.FileStream?

    - by Jonathan Dyle
    Hi all Am I missing something or does System.IO.FileStream not read Unicode text files containing Hebrew? public TextReader CSVReader(Stream s, Encoding enc) { this.stream = s; if (!s.CanRead) { throw new CSVReaderException("Could not read the given CSV stream!"); } reader = (enc != null) ? new StreamReader(s, enc) : new StreamReader(s); } Thanks Jonathan

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  • Would you use IdeaBlade with DevExpress controls for an N-Tier system?

    - by ERaubenheimer
    I’ve worked on numerous projects where we’ve developed our own frameworks and platforms from scratch and it was never really successful and I’m re-evaluating to rather use a commercial product to assist us with our product development. If you get a chance to develop an N-Tier system with a SOA layer from scratch would you recommend IdeaBlade with DevExpress? If not what other combinations would you recommend? Requirements: - SOA Layer - Business components - DAL with database independency as optional - Developer support - Easy upgradable - .NET - No Royalties

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  • Why does System.Windows.MessageBoxImage have enumeration sub-items with the same value?

    - by devdigital
    Hi, I'm trying to write my own abstraction over the MessageBoxImage enumeration, and see that MessageBoxImage is defined as: namespace System.Windows { public enum MessageBoxImage { None = 0, Error = 16, Hand = 16, Stop = 16, Question = 32, Exclamation = 48, Warning = 48, Asterisk = 64, Information = 64, } } How does the Show method determine whether to display an Error image or a Hand image? How would I write a method which takes a MessageBoxImage type, and return a CustomMessageBoxImage type which maps to the MessageBoxImage type, as I can't include both MessageBoxImage.Error and MessageBoxImage.Hand in the same switch statement?

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  • cannot evaluate expression because a native frame is on top of the call stack and system.accessviolationexception

    - by Joseph
    I have this code using c#. public partial class MainForm : Form { private CvCapture VideoCapture; private IplImage frame; private IplImage imgMain; public MainForm() { InitializeComponent(); } private void btnVideo_Click(object sender, EventArgs e) { double vidWidth, vidHeight; try { VideoCapture = highgui.CvCreateCameraCapture(0); } catch (Exception except) { MessageBox.Show(except.Message); } if (btnVideo.Text.CompareTo("Start Video") == 0) { if (VideoCapture.ptr == IntPtr.Zero) { MessageBox.Show("badtrip ah!!!"); return; } btnVideo.Text = "Stop Video"; highgui.CvSetCaptureProperty(ref VideoCapture, highgui.CV_CAP_PROP_FRAME_WIDTH, 640); highgui.CvSetCaptureProperty(ref VideoCapture, highgui.CV_CAP_PROP_FRAME_HEIGHT, 480); highgui.CvQueryFrame(ref VideoCapture); vidWidth = highgui.cvGetCaptureProperty(VideoCapture, highgui.CV_CAP_PROP_FRAME_WIDTH); vidHeight = highgui.cvGetCaptureProperty(VideoCapture, highgui.CV_CAP_PROP_FRAME_HEIGHT); picBoxMain.Width = (int)vidWidth; picBoxMain.Height = (int)vidHeight; timerGrab.Enabled = true; timerGrab.Interval = 42; timerGrab.Start(); } else { btnVideo.Text = "Start Video"; timerGrab.Enabled = false; if (VideoCapture.ptr == IntPtr.Zero) { highgui.CvReleaseCapture(ref VideoCapture); VideoCapture.ptr = IntPtr.Zero; } } } private void timerGrab_Tick(object sender, EventArgs e) { try { frame = highgui.CvQueryFrame(ref VideoCapture); if (frame.ptr == IntPtr.Zero) { timerGrab.Stop(); MessageBox.Show("??"); return; } imgMain = cxcore.CvCreateImage(cxcore.CvGetSize(ref frame), 8, 3); picBoxMain.Image = highgui.ToBitmap(imgMain, false); cxcore.CvReleaseImage(ref imgMain); //cxcore.CvReleaseImage(ref frame); } catch (Exception excpt) { MessageBox.Show(excpt.Message); } } } The problem is after i break all and step through the debugger the program stops at a certain code. the code where it stops is here: frame = highgui.CvQueryFrame(ref VideoCapture); the error is that it says that cannot evaluate expression because a native frame is on top of the call stack. and then when i try to shift+F11 it. there is another error saying that system.accessviolationexception. the stack trace says that: at System.Runtime.InteropServices.Marshal.CopyToManaged(IntPtr source, Object destination, Int32 startIndex, Int32 length) at CxCore.IplImage.get_ImageDataDb()

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  • What parts of this book are outdated? "Design of the UNIX Operating System" by Maurice Bach, 1986

    - by blee
    I learned programming on the job via high-level languages. I'm trying to gain a better understanding of the lower-level workings of computing and picked up "Design of the UNIX Operating System" by Maurice Bach. What do I need to know in terms of which topics in this book may not be relevant to understanding Linux nuts and bolts? Is there a newer book or Linux-specific book that I should read instead? I really like the clarity of this particular book, though.

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  • VS2010 error: Cannot find custom tool 'GlobalResourceProxyGenerator' on this system.

    - by artvolk
    Good day! My strongly typed resource classes acessible via Resources.<Name of resx file> in ASP.NET MVC2 project from /App_GlobalResources are not updated anymore. I've tried to right click on them and choose "Run custom tool" and got error: Cannot find custom tool 'GlobalResourceProxyGenerator' on this system. I use VS2010 Express, project is ASP.NET MVC2 (and uses T4MVC). Thanks in advance!

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  • How to get absolute path from path with system path variables?

    - by The_Fox
    Is there an easy way to translate a path with system path variables to an absolute path? So %ProgramFiles%\Internet Explorer\hmmapi.dll becomes C:\Program Files\Internet Explorer\hmmapi.dll I like to know if there is an API call that can do this, or do I have to do this the hard way and detect %..% sequences and replace them with the appropriate environment variable?

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  • What is common architecture of notification system on the web-forum, PMB and etc.?

    - by glaz666
    What I need is - list of new stuff from last visit - when user has already checked out some new entity since his last visit (ex. post on forum), mark this entity as read in the list - count different types of entities - private messages, posts, comments and etc. There are lot of websites using this technique for private messaging, listing new stuff and etc (ex. phpBB, this one and etc). Are there any common pattern, description of the system core which will events, making lists?

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