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  • Problem with datagridvieew in vb.net

    - by user225269
    I'm trying to add a datagridview in vb.net, but it does not allow me to change the connection string or the database that should be imported to connect to it. The only thing that I'm seeing is the previous ms sql database that I connected with datagridview and everytime I click the new connection, the window closes and it leaves me with the datagridview with the previous connection that I have. And its not applicable because, now I want to connect it with mysql. Not ms sql. Its some sort of a cache like feature in vb.net, how do I get rid of it. so that I can add the new connection for mysql? Do I need to reinstall visual studio 2008?

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  • Lucene.NET - Find documents that do not contain a specified field

    - by Brandon
    Let's say I have 2 instance of a class called 'Animal'. Animal has 3 fields: Name, Age, and Type The name field is nullable, so before I insert an instance of Animal as a Lucene indexed document, I check if Animal.Name == null, and if it does, I do not insert it as a field in my document. If I were to retrieve all animals, I would see that the Name field does not exist and I can set its value to null. However, there may be situations where I want to say "Get me all animals that do not have a name specified yet." In this situation I want to retrieve all Lucene.NET documents from my animal index that do not contain the Name field. Is there an easy way to do this with Lucene.NET? I want to stay away from having to perform some sort of hack to check if my name field has a value of 'null'.

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  • Where/When do C# and the .NET Framework fail to be the right tool?

    - by Nate Bross
    In my non-programming life, I always attempt to use the appropriate tool for the job, and I feel that I do the same in my programming life, but I find that I am choosing C# and .NET for almost everything. I'm finding it hard to come up with (realistic business) needs that cannot be met by .NET and C#. Obviously embedded systems might require something less bloated than the .NET Micro Framework, but I'm really looking for line of business type situations where .NET is not the best tool. I'm primarly a C# and .NET guy since its what I'm the most comfertable in, but I know a fair amount of C++, php, VB, PowerShell, batch files, and Java, as well as being versed in the web technologes (JavaScript, HTML, and CSS). But I'm open minded about it my skill set and I'm looking for cases where C# and .NET are not the right tool for the job. I choose .NET and C# because I'm comfortable with it, but I'm looking for cases where it isn't appropriate.

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  • Why can't I make an http request to the ASP.NET development server on localhost?

    - by Chris Farmer
    I have an ASP.NET project (VS2008 on Windows 7 with either webforms, MVC1, or MVC2 -- all the same result for me) which is just the File-New hello world web project. It's using the default ASP.NET development server, and when I start the server with F5, the browser never connects and I get a timeout. I tried to debug this by telnetting to the development server's port while it was running, and I got the same result: C:\Users\farmercs>telnet localhost 54752 Connecting To localhost...Could not open connection to the host, on port 54752: Connect failed I can see in the system tray that the server thinks it's running, and a netstat -s -n command shows that there is indeed an active TCP listener on that port. This worked in the not-too-distant past, and I could work on web projects using the development server. One thing that has changed since then was that I installed the Microsoft Loopback Adapter to accommodate a local development Oracle installation. I'm not sure this is the problem, but it seems a likely culprit. So, what could be blocking me from connecting? And if it's the loopback, then what is a good way for me to retain my ability to connect to my development Oracle server while still being able to use the ASP.NET development server?

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  • Expected time for an CakePHP MVC form/controller and db make up

    - by hephestos
    I would like to know, what is an average time for building a form in MVC pattern with for example CakePHP. I build 8 functions, two of them do custom queries, return json data, split them, expand them in a model in memory and delivers to the view. Those are three queries if you consider and an array to feed view for making some combo box. Why? all these, because I have data from json and I split them in order to make row of data like a table. Like that I changed a bit the edit.ctp but not a lot. And I created a javascript outside, with three functions. One collects data the other upon a change of a combo returnes the selected values, and does also some redirection flow. All this, in average how much time should it take ?

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  • ASP.net site looks completely different on IE, Firefox, and Chrome; why?

    - by DavidR
    I'm doing css for a website. I send the html and css to a guy, he puts it into ASP.net. The problem is that the transfer didn't end well for my code and it needs some fixing. The problem is that when I look at it in Chrome, or Firefox, or IE8, I get three completely different renderings. I spent a good amount of time trying to fix a drop-down menu that is supposed to appear while hovering over a link. The one he had in place from ASP.net worked in IE, kinda worked in Firefox, and was completely broken in Chrome (I haven't tested Safari or Opera.) Just getting it to look basically the same in firefox and chrome was a struggle. The html source is showing me two completely different pages as well. Does anyone have experience with this? I know nothing of ASP.net, and it seems like the guy is modifying my layout with a wsyiwyg (I found tables used in random places, which I did not put there.) Faced with this, what is my best option? Is this fixable, or am I in over my head?

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  • .NET Compact COM interoperability

    - by markhor
    I have the following code in a full .NET framework solution: public delegate int CreateObjectDelegate( [In] ref Guid classID, [In] ref Guid interfaceID, [MarshalAs(UnmanagedType.Interface)] out object outObject); ... var createObject = (NativeMethods.CreateObjectDelegate) Marshal.GetDelegateForFunctionPointer( NativeMethods.GetProcAddress(_modulePtr, "CreateObject"), typeof (NativeMethods.CreateObjectDelegate)); object result; Guid interfaceId = _guid; Guid classID = _classId; createObject(ref classID, ref interfaceId, out result); The purpose is to create the needed COM object at runtime. Is it possible with any .NET compact framework? Note that it doesn't have Marshal.GetDelegateForFunctionPointer.

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  • C#: Formview doesn't change Mode

    - by Vinzcent
    Hey When I try to change my formview to Edit, he stays in de ReadOnlyMode. I can't figure out why. This is my code. <asp:FormView ID="fvDetailOrder" runat="server" AllowPaging="True" DataKeyNames="ID" OnModeChanging="fvDetailOrder_ModeChanging"> <EditItemTemplate> // I want to see this, when I click edit <asp:LinkButton ForeColor="#003366" ID="UpdateButton" runat="server" CausesValidation="True" CommandName="Update" Text="Update" /> &nbsp;<asp:LinkButton ForeColor="#003366" ID="UpdateCancelButton" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel" /> </EditItemTemplate> <InsertItemTemplate> Insert here <asp:LinkButton ForeColor="#003366" ID="InsertButton" runat="server" CausesValidation="True" CommandName="Insert" Text="Insert" /> &nbsp;<asp:LinkButton ForeColor="#003366" ID="InsertCancelButton" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel" /> </InsertItemTemplate> <ItemTemplate> Read only <asp:LinkButton ForeColor="#003366" ID="EditButton" runat="server" CausesValidation="False" CommandName="Edit" Text="Edit" /> &nbsp;<asp:LinkButton ForeColor="#003366" ID="DeleteButton" runat="server" CausesValidation="False" CommandName="Delete" Text="Delete" OnClientClick="return confirm('Are you certain you want to delete this product?');" /> &nbsp;<asp:LinkButton ForeColor="#003366" ID="NewButton" runat="server" CausesValidation="False" CommandName="New" Text="New" /> </ItemTemplate> <PagerStyle ForeColor="#003366" /> </asp:FormView> Eventhandler protected void fvDetailOrder_ModeChanging(Object sender, FormViewModeEventArgs e) { fvDetailOrder.ChangeMode(e.NewMode); } Thanks, Vincent

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  • Open Source 2D Game Engine that supports Hexagon Maps for .NET

    - by Fred F.
    Hello, I cannot find a 2D game engine to create hexagon maps for .net. The best I can find is Xconq (http://sourceforge.net/projects/xconq/) and pygame. Does anybody where I can find any? preferrably one like xconq. Thank you for your time and effort. I really apprecate it. Edit: I would like to have feature of a strategic nature. Like adding custom AIs, path finding, etc. Xcong is an engine for turn-based strategy games.

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  • When radio button selection changes do not cause refresh?

    - by JPJedi
    When the selection of the radio buttons change I would like to show/hide the panel in the next table cell. I have it hiding and showing fine but each time it causes the page to refresh to the top. Is their a way to stop that refresh? I would like to hide and show the panel dynamically. <table> <tr> <td> <asp:RadioButtonList runat="server" ID="rblPlayerStatus" AutoPostBack="true" > <asp:ListItem>Free Agent</asp:ListItem> <asp:ListItem>I have teammate</asp:ListItem> </asp:RadioButtonList> </td> <td> <asp:Panel runat="server" ID="pnlTeamMate"> <asp:Label runat="server" ID="lblTeamMate" Text="Choose Teammate" /> </asp:Panel> </td> </tr> </table>

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  • .net, using PowerShell class to invoke a "[namespace.class]::method" style command

    - by Marco
    Hello, I created a powershell object via .net to invoke commands. When I invoke normal commands like 'Get-Process' I had no problems: ps.AddCommand("Get-Process").AddParameter(...).Invoke() but I'm not able to invoke a .net method with the syntax "[namespace.class]::method", just to make an example to invoke [System.IO.File]::Exists("c:\boo.txt"). I tried with ps.AddCommand("[System.IO.File]::Exists(\"c:\boo.txt\")").Invoke() ps.AddCommand("[System.IO.File]::Exists").AddArgument("c:\boo.txt\").Invoke() and some others. It always throws an exception which says that the command specified is not recognized. There is a way to invoke that type of command? Thanks

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  • Confused with conditional and logical operators - VB.net

    - by AgentRev
    I'm kind of new to VB.net, and since I just finished a C# course, the lack of parentheses creates a lot of confusion on how to write certain combinations of operators. The C# equivalent of the line I am trying to reproduce in VB would be like this : if ( (a == 0 && b != null) || (a == 1 && c != null) ) I'm have no idea how to write this in VB, I've tried many combinations of And, Or, AndAlso, OrElse, etc. but I can't achieve the desired result. I can't find any clear example of C# v.s. VB.net comparison on operators, and the notes I have aren't helpful either. Can someone help me figure this out?

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  • receive emails in a .NET service (C#)

    - by Jean Azzopardi
    Hi, this is my first posting on stackoverflow, so don't flame me too much ;) I'm building a service that's monitoring devices and should be able to receive emails from users, parse them and take action accordingly. It should also be able to send emails about the status of the devices, etc. I'll be using Windows.Live email, and as I said, a .NET service that should be able to send/recieve emails. I am wondering what kind of system would I need to cater for receiving the emails, as I already know how to send them via the System.net.Mail API. Thanks. EDIT : Thanks for your comments everybody, I'm looking forward to implementing this system and asking more questions on this rather excellent site.

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  • Create slide-in notifications à la Outlook in Windows with .NET

    - by Draak
    I am using .NET and am creating a desktop app/service that will display notifications in the corner of my Desktop when certain events are triggered. I don't want to use a regular Message Box b/c that would be too intrusive. The notifications would slide into view and then fade out after a few seconds. I am thinking of something that will act very much like the Outlook alerts that one gets when a new message arrives. The question is: Should I use WPF for this? I've never done anything with WPF but will happily try it if that's best means to the end. Is there a way to accomplish this with regular .NET libraries?

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  • .net - how to connect windows service with systray application

    - by razor
    I have a windows service that do something periodically. on user account runs systray application (written in C#) that communicate with windows service (thru .net remoting) and shows a status and some option to users. Everything works well beside that systray app uses 20-30MB of RAM ! it have to work in terminal environment, when 50 users login, only systray apps take 1GB of RAM ! and i don't have to add, that's wrong :) Is it possible to write .net systray application that will be small ? (1-2MB max?) or should I write it in c/c++? then, what kind of communication should I use between windows service (written in C#) and systray app ?

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  • Displaying a Sorted, Paged, and Filtered Grid of Data in ASP.NET MVC

    Over the past couple of months I've authored five articles on displaying a grid of data in an ASP.NET MVC application. The first article in the series focused on simply displaying data. This was followed by articles showing how to sort, page, and filter a grid of data. We then examined how to both sort and page a single grid of data. This article looks at how to add the final piece to the puzzle: we'll see how to combine sorting, paging and filtering when displaying data in a single grid. Like with its predecessors, this article offers step-by-step instructions and includes a complete, working demo available for download at the end of the article. Read on to learn more! Read More >

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