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  • .Net MEF newbie question

    - by steve.macdonald
    I am missing something basic when it comes to using MEF. I got it working using samples and a simple console app where everything is in the same assembly. Then I put some imports and exports in a separate project which contains various entities. I want to use these entities in an MS Test, but the composition is never actually done. When I move the composition stuff into the constructor of an entity in question it works, but that's obviously wrong. Does GetExecutingAssembly only "see" the test process? What am I missing re containers? I tried putting the container in a Using in the test without luck. The MEF docs are still very scant and I can't find a simple example of an application (or MS Test) which uses entities from a different project...

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  • Binary to strings as binary? C #/.NET

    - by acidzombie24
    Redis keys are binary safe. I'd like to mess around and put binary into redis using C#. My client of choice doesn't support writing binary keys it uses keys and it make sense. However i am just fooling around so tell me how i can do this. How do i convert a raw byte[] into a string? At first i was thinking about converting a byte[] to a utf8 string however unicode has some checks to see if its valid or not. So raw binary should fail. Actually i tried it out. Instead of failing i got a strange result. My main question is how do i convert a raw byte[] to the equivalent string? My unimportant question is why did i get a 512 byte string instead of an exception saying this is not a valid UTF8 string? code var rainbow = new byte[256]; for (int i = 0; i < 256; i++) { rainbow[i] = (byte)i; } var sz = Encoding.UTF8.GetString(rainbow); var szarr = Encoding.UTF8.GetBytes(sz); Console.WriteLine("{0} {1} {2}", ByteArraysEqual(szarr, rainbow), szarr.Length, rainbow.Length); Output False 512 256

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  • vb.net using SortedDictionary as combobox datasource

    - by user228058
    I have a combobox which i am binding to a sortedDictionary list, so it displays in ascending order. My question is, I need to display "--Select--" as the first option. Is there any way to either: 1) add another item besides for the datasource or 2) add an unsorted item to the top of the sortedDictionary any other ideas welcome as well :) TIA

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  • Accessing .NET functionality from a macro in a VSTO Excel workbook

    - by Daniel DiPaolo
    A while back, I built an Excel workbook for someone else using VSTO SE, and there's functionality in the accompanying DLL that they'd like to be able to use in a VB macro in the workbook. Short of rebuilding the workbook with a control that does what they want, is there a way they can just hook into the necessary function somehow via some sort of macro call? Does the macro have any sort of visibility into the functionality within the VSTO-built DLL that is associated with the workbook?

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  • Simplify CASE in VB.net code

    - by StealthRT
    Hey all, i am looking here to see if anyone would have a better way to acomplish this task below in less code. Select Case mainMenu.theNumOpened Case 1 Me.Text = "NBMsg1" Me.SetDesktopLocation(My.Computer.Screen.WorkingArea.Width - 302, 5) Case 2 Me.Text = "NBMsg2" Dim hwnd As IntPtr = FindWindow(vbNullString, "NBMsg1") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, Me.Height + 10, 0, 0, 1) Me.SetDesktopLocation(My.Computer.Screen.WorkingArea.Width - 302, 5) Case 3 Me.Text = "NBMsg3" Dim hwnd As IntPtr = FindWindow(vbNullString, "NBMsg2") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, Me.Height + 10, 0, 0, 1) hwnd = FindWindow(vbNullString, "NBMsg1") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, (Me.Height * 2) + 15, 0, 0, 1) Me.SetDesktopLocation(My.Computer.Screen.WorkingArea.Width - 302, 5) Case 4 Me.Text = "NBMsg4" Dim hwnd As IntPtr = FindWindow(vbNullString, "NBMsg3") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, Me.Height + 10, 0, 0, 1) hwnd = FindWindow(vbNullString, "NBMsg2") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, (Me.Height * 2) + 15, 0, 0, 1) hwnd = FindWindow(vbNullString, "NBMsg1") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, (Me.Height * 3) + 20, 0, 0, 1) Me.SetDesktopLocation(My.Computer.Screen.WorkingArea.Width - 302, 5) Case 5 Me.Text = "NBMsg5" Dim hwnd As IntPtr = FindWindow(vbNullString, "NBMsg4") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, Me.Height + 10, 0, 0, 1) hwnd = FindWindow(vbNullString, "NBMsg3") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, (Me.Height * 2) + 15, 0, 0, 1) hwnd = FindWindow(vbNullString, "NBMsg2") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, (Me.Height * 3) + 20, 0, 0, 1) hwnd = FindWindow(vbNullString, "NBMsg1") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, (Me.Height * 4) + 25, 0, 0, 1) Me.SetDesktopLocation(My.Computer.Screen.WorkingArea.Width - 302, 5) Case 6 Me.Text = "NBMsg6" Dim hwnd As IntPtr = FindWindow(vbNullString, "NBMsg5") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, Me.Height + 10, 0, 0, 1) hwnd = FindWindow(vbNullString, "NBMsg4") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, (Me.Height * 2) + 15, 0, 0, 1) hwnd = FindWindow(vbNullString, "NBMsg3") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, (Me.Height * 3) + 20, 0, 0, 1) hwnd = FindWindow(vbNullString, "NBMsg2") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, (Me.Height * 4) + 25, 0, 0, 1) hwnd = FindWindow(vbNullString, "NBMsg1") SetWindowPos(hwnd, 0, My.Computer.Screen.WorkingArea.Width - 302, (Me.Height * 5) + 30, 0, 0, 1) Me.SetDesktopLocation(My.Computer.Screen.WorkingArea.Width - 302, 5) Case Else Me.Close() Me.Dispose() End Select What it does is pass to it now many windows are currently already opened. So if one then of course it goes to case 1. If there are 2 opened then it moves the oldest down and puts the newest on top. etc etc. I have set it so that a max of 6 boxes can only be opened at one time. If anyone knows how i could also "slide" them down (kinda like an effect of jQuery) then that would also be, well awesome to know! :o) Any help/suggestions would be great! :o) David

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  • VB.net Debug sqldatareader - immediate window

    - by ScaryJones
    Scenario is this; I've a sqldatareader query that seems to be returning nothing when I try to convert the sqldatareader to a datatable using datatable.load. So I debug into it, I grab the verbose SQL query before it goes into the sqldatareader, just to make sure it's formatted correctly. I copy and paste this into SQL server to run it and see if it returns anything. It does, one row. I go back to visual studio and let the program continue, I create a datatable and try to load the sqldatareader but it just returns an empty reader. I'm baffled as to what's going on. I'll copy a version of the code (not the exact SQL query I'm using but close) here: Dim cn As New SqlConnection cn.ConnectionString = <connection string details here> cn.Open() Dim sqlQuery As String = "select * from Products where productid = 5" Dim cm As New SqlCommand(sqlQuery, cn) Dim dr As SqlDataReader = cm.ExecuteReader() Dim dt as new DataTable dt.load(dr) dt should have contents but it's empty. If I copy that SQL query into sql server and run it I get a row of results. Any ideas what I'm doing wrong? ######### UPDATE ############ I've now noticed that it seems to be returning one less row than I get with each SQL query. So, if I run the SQL myself and get 1 row then the datatable seems to have 0 rows. If the query returns 4 rows, the datatable has 3!! Very strange, any ideas anyone?

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  • VB.NET GroupBy LINQ statement

    - by Jason
    I am having a bear of a time getting this to work. I have a List(Of MyItem) called Items that have a OrderId property on them. From those items, I want to create a list of Orders. Some items will have the same OrderId so I want to try to group by OrderId. I then want to sort by date. Here's what I have so far: Public ReadOnly Property AllOrders() As List(Of Order) Get Return Items.Select(Function(i As MyItem) New Order(i.OrderID)) _ .GroupBy(Function(o As Order) New Order(o.OrderID)) _ .OrderBy(Function(o As Order) o.DateOrdered).ToList End Get End Property This, of course, doesn't compile, and I get the error: Value of type 'System.Collections.Generic.List(Of System.Linq.IGrouping(Of Order, Order))' cannot be converted to 'System.Collections.Generic.List(Of Order))' I've bolded the part where I think the problem is, but I have no idea how to fix it. Also, it used to work fine (except there were duplicate values) before I added the .GroupBy statement. Anyone have any ideas? Thanks

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  • .NET OwnerDraw ComboBox: Vista/7 themed DropDownList

    - by Stijn
    I'm working on a custom ComboBox for a project, and have the basic painting working. One of the remaining things to do is make it look like the default ComboBox in Vista and 7, when the DropDownStyle is set to DropDownList (looks like a button instead of a regular ComboBox). I read much about VisualStyleRenderer, read ComboBox.cs and ComboBoxRenderer.cs, and tried to get it working. It works in the sense of, it does something. It just doesn't do what it's supposed to do. I also found an article about Vista themed Owner-Drawn Buttons, but it is in C++ (which would be a challenge on its own for me) and it seems like an awful lot of code. If anyone could supply either VB or C# code, that would be great. Below is my current code. Public Sub New() DrawMode = Windows.Forms.DrawMode.OwnerDrawFixed ItemHeight *= 2 DropDownStyle = ComboBoxStyle.DropDownList End Sub Protected Overrides Sub OnDrawItem(ByVal e As System.Windows.Forms.DrawItemEventArgs) If e.Index = -1 Then Return End If If Not (e.State = DrawItemState.Selected) Then e.DrawBackground() End If Dim brsh As Brush If (e.State And DrawItemState.Focus) = DrawItemState.Focus And (e.State And DrawItemState.Selected) = DrawItemState.Selected Then brsh = SystemBrushes.HighlightText Else brsh = SystemBrushes.ControlText End If e.DrawFocusRectangle() e.Graphics.DrawString(Items(e.Index), e.Font, brsh, e.Bounds) End Sub

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  • JSOn.Net library JsonConvert

    - by ozsenegal
    I'm using http://json.codeplex.com library.Im trying to convert XML to JSON and vice-versa. However they have an example,using "JsonConvert" class XmlDocument doc = new XmlDocument(); doc.LoadXml(xml); string jsonText = JsonConvert.SerializeXmlNode(doc); I cant find "JsonConvert" in namespace "Newtonsoft.Json".Only class i've found is "JavaScriptConvert". Any ideas?

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  • Change the source of image by clicking thumbnail using updatePanel

    - by Batu
    For example, i have this ImageViewer.ascx UserControl: <div class="ImageTumbnails"> <asp:ListView ID="ImageList" runat="server" ItemPlaceholderID="ItemContainer"> <LayoutTemplate> <asp:PlaceHolder ID="ItemContainer" runat="server" /> </LayoutTemplate> <ItemTemplate> <asp:HyperLink runat="server" NavigateUrl='<%# Link.ToProductImage(Eval("ImageFile").ToString())%>'> <asp:Image runat="server" ImageUrl='<%# Link.ToThumbnail(Eval("ImageFile").ToString()) %>' /> </asp:HyperLink> </ItemTemplate> </asp:ListView> </div> <div class="ImageBig"> <asp:Image ID="ProductImageBig" runat="server" ImageUrl="" /> </div> When the thumbnail is clicked it will change the source of ProductImageBig with its hyperlink target. How can i achieve this using UpdatePanel ? ( Or will i be able to )

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  • Tutorials for .NET database app using SQLite

    - by ChrisC
    I have some MS Access experience, and had a class on console c++ apps, now I am trying to develop my first program. It's a little C# db app. I have the db tables and columns planned and keyed into VS, but that's where I'm stuck. I'm needing C#/VS tutorials that will guide me on configuring relationships, datatyping, etc, on the db so I can get it ready for testing of the schema. The only tutorials I've been able to find either talk about general db basics (ie, not helping me with VS/C#), or about C# communications with an existing SQL db. Thank you. (In case it matters, I'm using the open source System.Data.SQLite (sqlite.phxsoftware.com) for the db. I chose it over SQL Server CE after seeing a comparison between the two. Also I wanted a server-less version of SQL because this little app will be on other people's computers and I want to to do as little support as possible.)

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  • .NET SerialPort DataReceived event thread interference with main thread

    - by Kiran
    I am writing a serial communication program using the SerialPort class in C# to interact with a strip machine connected via a RS232 cable. When i send the command to the machine it responds with some bytes depending on the command. Like when i send a "\D" command, i am expecting to download the machine program data of 180 bytes as a continous string. As per the machine's manual, it suggests as a best practice to send an unreognized characters like comma (,) character to make sure the machine is initialized before sending the first command in the cycle. My serial communication code is as follows: public class SerialHelper { SerialPort commPort = null; string currentReceived = string.Empty; string receivedStr = string.Empty; private bool CommInitialized() { try { commPort = new SerialPort(); commPort.PortName = "COM1"; if (!commPort.IsOpen) commPort.Open(); commPort.BaudRate = 9600; commPort.Parity = System.IO.Ports.Parity.None; commPort.StopBits = StopBits.One; commPort.DataBits = 8; commPort.RtsEnable = true; commPort.DtrEnable = true; commPort.DataReceived += new SerialDataReceivedEventHandler(commPort_DataReceived); return true; } catch (Exception ex) { return false; } } void commPort_DataReceived(object sender, SerialDataReceivedEventArgs e) { SerialPort currentPort = (SerialPort)sender; currentReceived = currentPort.ReadExisting(); receivedStr += currentReceived; } internal int CommIO(string outString, int outLen, ref string inBuffer, int inLen) { receivedStr = string.Empty; inBuffer = string.Empty; if (CommInitialized()) { commPort.Write(outString); } System.Threading.Thread.Sleep(1500); int i = 0; while ((receivedStr.Length < inLen) && i < 10) { System.Threading.Thread.Sleep(500); i += 1; } if (!string.IsNullOrEmpty(receivedStr)) { inBuffer = receivedStr; } commPort.Close(); return inBuffer.Length; } } I am calling this code from a windows form as follows: len = SerialHelperObj.CommIO(",",1,ref inBuffer, 4) len = SerialHelperObj.CommIO(",",1,ref inBuffer, 4) If(inBuffer == "!?*O") { len = SerialHelperObj.CommIO("\D",2,ref inBuffer, 180) } A valid return value from the serial port looks like this: \D00000010000000000010 550 3250 0000256000 and so on ... I am getting some thing like this: \D00000010D,, 000 550 D,, and so on... I feel that my comm calls are getting interferred with the one when i send commands. But i am trying to make sure the result of the comma command then initiating the actual command. but the received thread is inserting the bytes from the previous communication cycle. Can any one please shed some light into this...? I lost quite some hair just trying to get this work. I am not sure where i am doing wrong

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  • Implementing Security on custom BCS/.net class?

    - by Michael Stum
    I'm implementing a custom BCS Model to get data from a backend system. As the backend uses it's own user management, I'm accessing it through a service account. All of this works well and allows me to pull data into SharePoint. However because it's channeled through the service account, everyone can access it, which is bad. Can anyone give me some tips which method to implement? The backend does not give me NT ACLs, but I wonder if I could just "fake" them somehow? (Essentially saying "This NT Group has Read Access" is good enough). I am aware of ISecurityTrimmer2 for Search Results, but ideally I want to cover security inside the BCS Model so that it applies to external lists as well. I want to avoid using Secure storage and mapping each individual user to the backend.

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  • Convert Unicode char to closest (most similar) char in ASCII (.net)

    - by Andrey
    Hi all! Do you have any idea how to covert different Unicode characters to their closest ASCII equivalents? Like Ä - A. A googled but didn't find any suitable solution. Trick Encoding.ASCII.GetBytes("Ä")[0] didn't work. (Result was ?). I found that there is class Encoder that has Fallback property that is exactly for cases when char can't be converted, but implementations (EncoderReplacementFallback) are stupid and convert to ?. Any ideas? Thanks, Andrey

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  • .NET: IOException for permissions when creating new file?

    - by Rosarch
    I am trying to create a new file and write XML to it: FileStream output = File.Create(Path.Combine(PATH_TO_DATA_DIR, fileName)); The argument evaluates to: C:\path\to\Data\test.xml The exception is: The process cannot access the file 'C:\path\to\Data\test.xml' because it is being used by another process. What am I doing wrong here? UPDATE: This code throws the same exception: StreamWriter writer = new StreamWriter(Path.Combine(PATH_TO_DATA_DIR, fileName)); UPDATE 2: The file I am trying to create does not exist in the file system. So how can be it in use?

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  • .NET Com Interopability

    - by Kottan
    I have a C# class X which inherits from class Y. Class X should be Com-Visible (should be used in an old Vb6 application). It is neccessary to use some Types of class Y in the VB6 application. How can I make them also COM-visible (without changing class Y) ?

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  • Why don't the .net 4.0 charting controls work in Visual Web Developer 2010 Express?

    - by kc
    The .net charting controls are now built into .net 4.0. They work great in Visual Studio 2010. However, they do not work in Visual Web Developer 2010 Express (which is what I have at home.) I get the error, System.Web.HttpException: Error executing child request for ChartImg.axd. That sounds like the message from .net 3.5 if charting wasn't set up correctly. But the bottom of the same page says, "Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1" Does anyone know why this doesn't work?

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  • Can't hit breakpoint in ASP.NET web app (Stop debugging in progress... popup in VS)

    - by dotnetdev
    Hi, I am trying to debug some code in my ASP.NET web app. I set a breakpoint in one of the page events of the page's codebehind, and this once came up with a special icon in place of the red breakpoint saying symbols have not been loaded and the breakpoint will not be hit. This error has not repeated itself but why can't I hit the breakpoint? Also, when I press stop, I get a popup in VS stating: Stop Debugging In Progres... Debugging is being stopped but is not yet complete. You can force debugging to stop completely, but any processes attached may terminate. This window will automatically close when debugging has completely stopped. Completely stop I also don't get the website appear in my browser either when starting to debug. :( To make things worse, I have a line of code like this in my page's codebehind: RssFeedSites = opml.Parse(filestream); I am putting the problematic breakpoint on this line. But I have a programatic breakpoint in the Parse() method of opml, but this does not get hit, either. Thanks

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  • capture webcam stream and send it over network using DirectShow.net

    - by SR Dusad
    Hi all, I m working on a video conference project in vs2010 with c#. I m able to capture the snaps from web cam in picture box with the help of Directshownet samples available on SouceForge.But i can't find any proper solution for capturing the audio/video stream directly from web cam using Directshownet. If anybody know about this problem's solution, pls give me ur advise . Waitng for ur response ...

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  • VB.NET Debug Error

    - by Daniel
    I get this error "Illegal characters in path" for this code: Dim strm As System.IO.FileStream strm = New System.IO.FileStream(filepath, IO.FileMode.Open, IO.FileAccess.Read)

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  • How to cache method results in .Net

    - by SP
    Using webmethods, caching the results is pretty straight forward using "CacheDuration" attribute. Is there a similar "easy" way to cache non-webmethod outputs (or static methods) based on the parameters? I would appreciate any help. Thanks in advance!

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