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  • C#: Windows Forms: Getting keystrokes in a panel/picturebox?

    - by Rosarch
    I'm making a level editor for a game using windows forms. The form has several drop down menus, text boxes, etc, where the user can type information. I want to make commands like CTRL + V or CTRL + A available for working within the game world itself, not text manipulation. The game world is represented by a PictureBox contained in a Panel. This event handler isn't ever firing: private System.Windows.Forms.Panel canvas; // ... this.canvas = new System.Windows.Forms.Panel(); // ... this.canvas.PreviewKeyDown += new System.Windows.Forms.PreviewKeyDownEventHandler(this.canvas_PreviewKeyDown); What is the preferred way of doing this? Can a panel even receive keyboard input? I would like to allow the user to use copy/paste/select-all commands when working with the text input, but not when placing objects in the game world.

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  • Start Default Browser - Windows

    - by dbasnett
    When starting the default browser like this: Dim trgt1 As String = "http://www.vbforums.com/showthread.php?t=612471" pi.FileName = trgt1 System.Diagnostics.Process.Start(pi) It takes about 40 seconds to open the page. If I do it like this, though this isn't the default browser Dim trgt1 As String = "http://www.vbforums.com/showthread.php?t=612471" pi.Arguments = trgt1 pi.FileName = "iexplore.exe" 'or firefox.exe System.Diagnostics.Process.Start(pi) it opens immediately. Is this a bug or a feature? I have tried this with both IE and FireFox set to be the default browser.

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  • Synchronous and asynchronous callbacks

    - by csharpbaby
    I get confused with some terms while reading MSDN documents and code samples. What are callbacks in C#? In particular, what are synchronous and asynchronous callbacks ? Please explain these from a layman's point of view. Also, please explain the IAsyncResult interface. How can we implement it? (with very simple example) Thanks in advance. EDITED: Fixed spelling, grammar

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  • WPF ComboBox binding

    - by Budda
    Here is peace of the XAML code from my page: <ComboBox Grid.Row="2" Grid.Column="1" Name="Player2" MinWidth="50" ItemsSource="{Binding PlayersTest}" DisplayMemberPath="ShortName"> custom object is binded to the page data context: page.DataContext = new SquadViewModel(); Here is part the source code of 'SquadViewModel' class: public class SquadViewModel { public SquadViewModel() { PlayersTest = new ObservableCollection<SostavPlayerData>(); PlayersTest.Add(new SostavPlayerData { ShortName = "A. Sereda", }); PlayersTest.Add(new SostavPlayerData { ShortName = "D. Sereda", }); } public readonly ObservableCollection<SostavPlayerData> PlayersTest; public string TestText { get { return "Binding works perfectly!"; } } } As a result ComboBox should display a list of objects, but it is empty. Do you know why and how to get this list? Thank you. P.S. I've tried another XAML markup <ComboBox Grid.Row="1" Grid.Column="1" Name="Player1" MinWidth="50" ItemsSource="{Binding PlayersTest}"> <ComboBox.ItemTemplate> <DataTemplate> <TextBlock Text="{Binding ShortName}"/> </DataTemplate> </ComboBox.ItemTemplate> </ComboBox> It doesn't work also, but binding to simple text block: <TextBlock Grid.Row="2" Grid.Column="1" Text="{Binding TestText}"/> Works perfectly.

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  • Embedding IWebbrowser2 ATL interface control in C# windows mobile smart device application

    - by Ramanand Bhat
    Hi All, We have developed an ATL smart device project for to save the web page locally in windows mobile device. The application uses native IWebbrowser2 ATL interface control to browse the web page and save the web page complete. Now we need to have our UI and other user interface controls to be designed and developed using C# also we have some UI module already available in C#. So please provide us a method to embed native IWebbrowser2 ATL interface control to the C# smart device project. your feedback will be greatly appreciated. Thanks, Ramanand Bhat.

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  • Extract enumeration data from .XSD file

    - by Ram
    Hi, I am trying to read enum from a XSD file. The schema is as follows <xs:schema id="ShipReports-v1.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" attributeFormDefault="unqualified" elementFormDefault="qualified" msdata:IsDataSet="true"> <xs:simpleType name="Type"> <xs:restriction base="xs:string"> <xs:enumeration value="Op1" /> <xs:enumeration value="Op2" /> <xs:enumeration value="Op3" /> </xs:restriction> </xs:simpleType> </xs:schema> I also tried using this but I am getting list item count as Zero. Following is the code I am using DataSet _sR = new DataSet(); _sR.ReadXmlSchema(assembly.GetManifestResourceStream("v1.xsd")); XmlDocument xDoc = new XmlDocument(); xDoc.LoadXml(_sR.GetXml()); XmlNamespaceManager xMan = new XmlNamespaceManager(xDoc.NameTable); xMan.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema"); XmlNodeList xNodeList = xDoc.SelectNodes( "//xs:schema/xs:simpleType[@name='Type']/xs:enumeration", xMan); string[] enumVal = new string[xNodeList.Count]; int ctr = 0; foreach (XmlNode xNode in xNodeList) { enumVal[ctr] = xNode.Attributes["value"].Value; ctr++; }

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  • How can I run NHibenate queries asynchronously?

    - by andrey-tsykunov
    Hello, One way to increase scalability of the server application is to run IO-bound operation (reading files, sockets, web requests, database requests etc) asynchronously. This does not mean run then in the ThreadPool which will just block threads while operation is being executed. The correct way is to use asynchronous API (BeginRead, BeginGetResponse, BeginExecuteReader etc). The problem is well described in CLR vi C# book. Here is some article about asynchronous queries in Linq to SQL. Are any ways to execute Nhibernate query asynchonously? What about Linq to NHibernate? Thank you, Andrey

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  • WSE 3.0 cookies support?

    - by aloneguid
    Hi, I'm trying to call a web service with WSE 3.0 which uses cookies for authentication. With standard SoapHttpClientProtocol, I could assign my CookieContainer to a request. However, WSE 3.0 web services does not directly or indirectly inherit from it. How can I set cookies to WSE 3.0 request?

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  • RowFilter including [ character in search string

    - by JeffC
    I fill a DataSet and allow the user to enter a search string. Instead of hitting the database again, I set the RowFilter to display the selected data. When the user enters a square bracket ( "[" ) I get an error "Error in Like Operator". I know there is a list of characters that need prefixed with "\" when they are used in a field name, but how do I prevent RowFilter from interpreting "[" as the beginning of a column name?

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  • How to change the security level of a local assembly to internet or customized permission set?

    - by Jamebo
    I built a assembly which is a class library, for example lib.dll . And I also have a application to access this lib, for example test.exe. I changed the security permission for the test.exe to "intranet". At the same time, I want to change lib.dll to "Internet" like this: (Because I want to do some testing for security.) CasPol.exe -m -ag 1.2 -strong -file lib.dll lib 1.0.0.0 Internent But it seems the lib.dll can not get the security permission as I wanted. What is wrong with the command? Or maybe there are some other better solutions? Thanks -Jamebo

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  • Entity Framework Performance Problem

    - by Steve Horn
    I'm hoping that someone can help me understand how to overcome a performance problem I'm running into with the latest version of the Entity Framework. In my test, I created my model from a database consisting of around 80 tables. The problem that I'm running into is that the cost of the very first query I run on a thread is very expensive. If I run without pre-compiling views the first query takes anywhere from 5800 to 6600 milliseconds. If I pre-compile the views (see this article) I can get the initial query cost down to about 2800 to 3200 milliseconds. 3 seconds for each request is still unacceptable for my needs. Subsequent queries are very fast. Can you please help me understand how to eliminate the poor performance of the initial query? I'm using the version of entity framework that ships with Visual Studio 2010 RC.

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  • dynamic ul with sub-levels

    - by Y.G.J
    i have this recursive code <ul> <% sql="SELECT * FROM cats ORDER BY orderid " rs.Open sql,Conn dim recArray If Not rs.EOF Then recArray = rs.getRows() dim i for i=0 to uBound(recArray,2) if recArray(1,i)=0 then call showMessage(i) end if next End If function showMessage(index) %><li><%=recArray(2,index)%></li><% for a=0 to uBound(recArray,2) if recArray(1,a) = recArray(0,index) Then %><ul><% call showMessage(a) %></ul><% end if next %></li><% end function %> </ul> inside the loop in the function i have the for the sub(s) but after each line of li it will close the ul how can i have that dynamic and to have the output like this <ul> <li></li> <li></li> <li> <ul> <li></li> <li></li> <li></li> </ul> </li> <li></li> </ul> and not like this <ul> <li></li> <li></li> <li> <ul><li></li></ul> <ul><li></li></ul> <ul><li></li></ul> </li> <li></li> </ul>

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  • install a service on a remote computer from a MSBuild script

    - by Raul
    I have this task that creates a service: Target Name="InstallService" DependsOnTargets="CopyFiles" Exec Command="sc \remotecomputer create "ServiceHost" binPath= "E:\ServiceHost.exe" DisplayName= "ServiceHost"" WorkingDirectory="c:\" ContinueOnError="false" / /Target The problem is that when I run this script it doesn't know the \remotecomputer.

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  • How can I get the dimensions of a drawn string without padding?

    - by Dan Herbert
    I'm trying to create an image with some text on it and I want the image's size to match the size of the rendered text. When I use System.Windows.Forms.TextRenderer.MeasureText(...) to measure the text, I get dimensions that include font padding. When the text is rendered, it seems to use the same padding. Is there any way to determine the size of a string of text and then render it without any padding? This is the code I've tried: // Measure the text dimensions var text = "Hello World"; var fontFamily = new Font("Arial", 30, FontStyle.Regular); var textColor = new SolidBrush(Color.Black); Size textSize = TextRenderer.MeasureText(text, fontFamily, Size.Empty, TextFormatFlags.NoPadding); // Render the text with the given dimensions Bitmap bmp = new Bitmap(textSize.Width, textSize.Height); Graphics g = Graphics.FromImage(bmp); g.TextRenderingHint = TextRenderingHint.AntiAliasGridFit; g.DrawString(text, fontFamily, textColor, new PointF(0, 0)); bmp.Save("output.png", ImageFormat.Png); This is what currently gets rendered out: This is what I want to render: I also looked into Graphics.MeasureString(...), but that can only be used on an existing Graphics object. I want to know the size before creating the image. Also, calling Graphics.MeasureString(...) returns the same dimensions, so it doesn't help me any.

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  • how do i return arraylist from a function?

    - by KoolKabin
    Hi guys, I learnt example from msdn to populate a listbox control with arraylist. http://msdn.microsoft.com/en-us/library/1818w7we(v=VS.100).aspx I want to create a function which will give return the USStates arraylist and use the returned value as datasource for listbox1 Dim USStates As New ArrayList() USStates.Add(New USState("Alabama", "AL")) USStates.Add(New USState("Washington", "WA")) USStates.Add(New USState("West Virginia", "WV")) USStates.Add(New USState("Wisconsin", "WI")) USStates.Add(New USState("Wyoming", "WY")) ListBox1.DataSource = USStates ListBox1.DisplayMember = "LongName" ListBox1.ValueMember = "ShortName I tried creating a function like: Public Shared Function FillList() As ArrayList() Dim USStates As New ArrayList() USStates.Add(New USState("Alabama", "AL")) USStates.Add(New USState("Washington", "WA")) USStates.Add(New USState("West Virginia", "WV")) USStates.Add(New USState("Wisconsin", "WI")) USStates.Add(New USState("Wyoming", "WY")) return usstates end function but it says error: Value of type 'System.Collections.ArrayList' cannot be converted to '1-dimensional array of System.Collections.ArrayList'.

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  • YesNo MessageBox not closing when x-button clicked

    - by Simpzon
    When I open a MessageBox with options YesNo, the (usually) cancelling cross in the upper right is shown but has no effect. System.Windows.MessageBox.Show("Really, really?", "Are you sure?", MessageBoxButton.YesNo); If I offer YesNoCancel as options, clicking the cross closes the Dialog with DialogResult Cancel. System.Windows.MessageBox.Show("Really, really?", "Are you sure?", MessageBoxButton.YesNoCancel); I would have expected that the cross is "looking disabled" if not hidden at all, when clicking it has no effect. Probably I am not the first one observing this. What is your favorite way to hide/disable this button or workaround the issue? Note: I would prefer a solution that does not use System.Windows.Forms, since I am dealing with WPF projects and would like to avoid any InterOp if possible.

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  • Log to rolling CSV file with Enterprise Library

    - by Tinminator
    Need logging to: Rolling file, to avoid 1 big log file. CSV format for easier look up. I can see EntLib (5.0) have Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.RollingFlatFileTraceListener to log to rolling log file. To make the log entries look like a CSV row, I can change the Logging.Formatters.TextFormatter.Template to put double quote around the values. Also change the Listener's Footer and Header to nothing, so they won't be output. Under normal circumstance, this would give me a well formed CSV file. However if a token value in the Template contain double quote, this would not be escaped, hence the log file become an invalid CSV file. Is there any way to resolve this? Is there any alternative solutions to this problem?

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  • Status Code from FTPWebRequest GetResponse method

    - by nick
    This is slightly tricky. I am uploading files to FTP asynchronously. After uploading each file I am checking the status of the upload operation for that file. This can be done with StatusCode property of the FtpWebResponse object for that request. The code snippet is as give below. System.IO.FileStream fs = System.IO.File.Open(fileName, System.IO.FileMode.Open); while ((iWork = fs.Read(buf, 0, buf.Length)) > 0) requestStream.Write(buf, 0, iWork); requestStream.Close(); FtpWebResponse wrRet = ((FtpWebResponse)state.Request.GetResponse()); There are about 37 StatusCode values as per msdn. I am unaware as to which of these status code values will assure that the file is uploaded successfully. Some of them I used in my code to check for success are : wrRet.StatusCode == FtpStatusCode.CommandOK wrRet.StatusCode == FtpStatusCode.ClosingData wrRet.StatusCode == FtpStatusCode.ClosingControl wrRet.StatusCode == FtpStatusCode.ConnectionClosed wrRet.StatusCode == FtpStatusCode.FileActionOK wrRet.StatusCode == FtpStatusCode.FileStatus But I am unaware of the rest. I need to be sure about these codes because based on the failure or success of the upload operation I have other dependant operations to be carried out. A wrong condition can affect the remaining code. Another thought that crossed my mind was to simply put the above code into a try..catch and not depend on these status codes. With this I would not be depending on the status codes and assuming that any failure will always be directed to the catch block. Kindly let me know if this is the right way. Thanks in advance.

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  • How to prevent GetOleDbSchemaTable from returning duplicate sheet names from Excel workbook

    - by Richard Bysouth
    Hi I have a function to return a DataView containing info on sheets in an Excel Workbook, as follows: Public Function GetSchemaInfo() As DataView Using connection As New OleDbConnection(GetConnectionString()) connection.Open() Dim schemaTable As DataTable = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, Nothing) connection.Close() Return New DataView(schemaTable) End Using End Function This works fine except that if the workbook has linked data (i.e. pulls its data from another workbook), duplicate sheet names are returned. For example, Workbook1 has a single worksheet, Sheet1. I get 2 rows in the DataView, with the TABLE_NAME field being "Sheet1$" and "Sheet1$_". OK, I could use a RowFilter, but wondered whether there was a better way or why this extra row is returned? thanks Richard

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  • Converting a Linq expression tree that relies on SqlMethods.Like() for use with the Entity Framework

    - by JohnnyO
    I recently switched from using Linq to Sql to the Entity Framework. One of the things that I've been really struggling with is getting a general purpose IQueryable extension method that was built for Linq to Sql to work with the Entity Framework. This extension method has a dependency on the Like() method of SqlMethods, which is Linq to Sql specific. What I really like about this extension method is that it allows me to dynamically construct a Sql Like statement on any object at runtime, by simply passing in a property name (as string) and a query clause (also as string). Such an extension method is very convenient for using grids like flexigrid or jqgrid. Here is the Linq to Sql version (taken from this tutorial: http://www.codeproject.com/KB/aspnet/MVCFlexigrid.aspx): public static IQueryable<T> Like<T>(this IQueryable<T> source, string propertyName, string keyword) { var type = typeof(T); var property = type.GetProperty(propertyName); var parameter = Expression.Parameter(type, "p"); var propertyAccess = Expression.MakeMemberAccess(parameter, property); var constant = Expression.Constant("%" + keyword + "%"); var like = typeof(SqlMethods).GetMethod("Like", new Type[] { typeof(string), typeof(string) }); MethodCallExpression methodExp = Expression.Call(null, like, propertyAccess, constant); Expression<Func<T, bool>> lambda = Expression.Lambda<Func<T, bool>>(methodExp, parameter); return source.Where(lambda); } With this extension method, I can simply do the following: someList.Like("FirstName", "mike"); or anotherList.Like("ProductName", "widget"); Is there an equivalent way to do this with Entity Framework? Thanks in advance.

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  • How can I create two contructors that act differently but recieve the same data type?

    - by Sergio Tapia
    public class Parser { Downloader download = new Downloader(); HtmlDocument Page; public Parser(string MovieTitle) { Page = download.FindMovie(MovieTitle); } public Parser(string ActorName) { Page = download.FindActor(ActorName); } } I want to create a constructor that will allow other developers who use this library to easily create a Parser object with the relevant HtmlDocument already loaded as soon as it's done creating it. The problem lies in that a constructor cannot exist twice with the same type of parameters. Sure I can tell the logical difference between the two paramters, but the computer can't. Any suggestions on how to handle this? Thank you!

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  • Not getting correct time from UniversalDateTime

    - by Nakul Chaudhary
    I send a vcal through mail in web application with convert datetime to universal datetime. If i run web application locally (local sevser in India) i get correct time in my vcal. But run appication live (server in US) then not get corret time with a difference of 1 and half hour.Please suggest me. code : Dim result As StringBuilder = New StringBuilder() result.AppendFormat("BEGIN:VCALENDAR{0}", System.Environment.NewLine) result.AppendFormat("BEGIN:VEVENT{0}", System.Environment.NewLine) result.AppendFormat("SUMMARY:{0}{1}", subject, System.Environment.NewLine) result.AppendFormat("LOCATION:{0}{1}", location, System.Environment.NewLine) result.AppendFormat("DTSTART:{0}{1}", startDate.ToUniversalTime().ToString("yyyyMMdd\THHmmss\Z"), System.Environment.NewLine) result.AppendFormat("DTEND:{0}{1}", endDate.ToUniversalTime().ToString("yyyyMMdd\THHmmss\Z"), System.Environment.NewLine) result.AppendFormat("DTSTAMP:{0}{1}", DateTime.Now.ToUniversalTime().ToString("yyyyMMdd\THHmmss\Z"), System.Environment.NewLine) result.AppendFormat("DESCRIPTION:{0}{1}", description, System.Environment.NewLine) result.AppendFormat("END:VEVENT{0}", System.Environment.NewLine) result.AppendFormat("END:VCALENDAR{0}", System.Environment.NewLine) Return result.ToString()

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