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• Trouble with creating WPF window extended on the title area (like Office 2007/2010)

  - by Rikker Serg

  I want to make WPF window extended on the title area (like Office 2007/2010). I implemented DwmWindow (see DwmTest.zip) where I put required stuff. Commonly, it works fine except one disgusting thing: the window appears as white rectangle (see DwmIssue.png) and after a few second this rectangle disappears and the content of the window is shown (see DwmIssueCorrect.png). This bug is essential only for my window. If I remove this lines it works fine (without it aero will not showed on title): HwndSource mainWindowSrc = HwndSource.FromHwnd(handle); if (mainWindowSrc != null) mainWindowSrc.CompositionTarget.BackgroundColor = Colors.Transparent; NativeMethods.MARGINS margins = new NativeMethods.MARGINS(0, 50, 0, 0); NativeMethods.DwmExtendFrameIntoClientArea(handle, margins); How can I eliminate this white rectangle? (To run a sample DwmTest.zip WinVista/7 with DWM enabled and .NET 4.0 is required. To compile sample you will need Visual Studio 2010)

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• Set focus to another control after TreeView click

  - by Chintan Shah

  I have a TreeView control in a Windows application. I am opening another window from the TreeView click (Single Click) event (in tabbed environment, so all windows will appear as a tab in Visual Studio). I want to set focus to one control of the new window. The problem is that, I am able to set the focus on the double click event of the TreeView. But same doesn't seem to be working with the TreeView single-click event. Any workarounds?

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• load report fail in crystal reports doesn't have solution.

  - by mr-developer

  hi all, i'm using c sharp and crystal reports in visual studio 2008 in my application. the problem is that there is a form that i have crystalreporviewer on, when i call the form from form1 by button click event, the form and the report loads perfect, but when i call the from from another from that i've called from form1, this exception appears "load report fail". how can i solve this problem. i've googled and i didn't find any solution. I think there is a difference between form1 and the other form which i call the form of the report from. this is the code of the report form load try { cryRpt.Load("..\\..\\CrystalReport1.rpt"); crystalReportViewer1.ReportSource = cryRpt; crystalReportViewer1.Refresh(); } catch(Exception ex) { MessageBox.Show(ex.Message); } thanks in advance for any replies

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• Generate Color Gradient in C#

  - by Ngu Soon Hui

  My question here is similar to the question here, except that I am working with C#. I have two colors, and I have a predefine steps. How to retrieve a list of Colors that are the gradients between the two? This is an approach that I tried, which didn't work: int argbMax = Color.Chocolate.ToArgb(); int argbMin = Color.Blue.ToArgb(); var colorList = new List<Color>(); for(int i=0; i<size; i++) { var colorAverage= argbMin + (int)((argbMax - argbMin) *i/size); colorList.Add(Color.FromArgb(colorAverage)); } If you try the above code, you will find that a gradual increase in argb doesn't correspond to a visual gradual increase in the color. Any idea on this?

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• SHA1CryptoServiceProvider changed in .NET 4

  - by WebDude

  I am currently trying to upgrade a project of mine from .NET 3.5 to .NET 4.0 Everything was going really well, all code compiled, all tests passed. Then I hit a problem deploying to my stagomg environment. Suddenly my logins were no longer working. It seems my SHA1 hashed passwords are being hashed differently in .NET 4. I am using the SHA1CryptoServiceProvider: SHA1CryptoServiceProvidercryptoTransformSHA1 = new SHA1CryptoServiceProvider(); To test I created a new Visual Studio project with 2 console applications. The first targeted at .NET Framework 3.5 and the second at 4.0. I ran exactly the same hashing code in both and different results were produced. Why is this happening and how can I fix this? I obviously cannot go update all of my users passwords considering I do not know what they are. Any help would be greatly appreciated.

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• WCF service reference stopped generating code for one project

  - by Mike Pateras

  I have references to two different WCF services in a project. I updated the reference for one of the services, and now no code is generated for it. The references.cs file just has the "this is genrated code" comment at the top. Updating that same service in other projects and updating the other service both work fine. It's only that one service reference in this one project that's causing the problem, and I'm getting no information from Visual Studio (it just says it failed to generate code and I should look at the other errors, which provide no information). If I uncheck the "reuse types in referenced assemblies", code is generated, but I don't want to have this one project be different from the others. I'd like to solve the problem. Re-checking the reuse type option produces an empty references.cs file, again. The collection type doesn't seem to matter, either. How can I diagnose and solve this problem?

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• Calling app_code folder from web application project

  - by Fred

  I am developing a module for DotNetNuke and have used a DotNetNuke Compiled Module template to create the module in the DesktopModule folder. I then get a Web Application Project under the DNN website in my Visual Studio 2008. Now I want to use DAL and BLL which are created in DNN app_code folder. But when I add them in code behind it can't find them. How do I tell my Web Application Project to access the app_code folder in the website "projcet"? Thanks in advance!

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• What information about me and my system do compilers add to executeables?

  - by I can't tell you my name.

  I'm currently using Microsoft Visual Studio 2010. If we say that we give 10 different people a copy of MSVC 10 and a short C++ Hello, World listing. They all create a new project using exactly the same settings, add a new cpp file with the Hello, World program and compile it. Do they all get the exactly same binary? If not, what are the exact differences? What information about my system does MSVC add to my executeable? Paranoia!

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• Web Forms 2.0: Editor & Libraries

  - by lacco

  Hi! I would like to build a web application where users can create forms with very few technical knowledge. Since they need "advanced" features like validations, required fields and some more, I am currently evaluating XForms and web forms 2.0 (from HTML 5 spec). Concerning web forms, my research couldn't find any answers for the following questions: Are there any (JavaScript) libraries out there which make web forms fully available in browsers which have currently no support for them (i.e. Firefox)? Is there a "web forms editor" which allows creating input and select fields, with setting attributes like the type, required, ...? It has to be something visual, and must create "nice" html. Any help/ hints would be appreciated!

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• "Ambiguous template specialization" problem

  - by Setien

  I'm currently porting a heap of code that has previously only been compiled with Visual Studio 2008. In this code, there's an arrangement like this: template <typename T> T convert( const char * s ) { // slow catch-all std::istringstream is( s ); T ret; is >> ret; return ret; } template <> inline int convert<int>( const char * s ) { return (int)atoi( s ); } Generally, there are a lot of specializations of the templated function with different return types that are invoked like this: int i = convert<int>( szInt ); The problem is, that these template specializations result in "Ambiguous template specialization". If it was something besides the return type that differentiated these function specializations, I could obviously just use overloads, but that's not an option. How do I solve this without having to change all the places the convert functions are called?

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• Converting a constantly changing scalar value to a changing interval or frequency

  - by eco_bach

  Although I'm coding in Objective C, this is more of a general programming question. What is the best way to convert a constantly changing scalar value to a changing interval or frequency? Right now every time the scalar value changes I am destroying the NSInterval ie [self.myTimer invalidate]; self.myTimer = nil; and creating a new one, but this seems like a VERY expensive way to achieve my goal, since the changing scalar value in my case represents the horizontal velocity of a swipe. For a rough analogy, think of the speed of a swipe being reflected in a visual metronome, the faster you swipe, the higher(shorter interval) the frequency of the metronome.

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• Where are the function literals in c++?

  - by academicRobot

  First of all, maybe literals is not the right term for this concept, but its the closest I could think of (not literals in the sense of functions as first class citizens). The idea is that when you make a conventional function call, it compiles to something like this: callq <immediate address> But if you make a function call using a function pointer, it compiles to something like this: mov <memory location>,%rax callq *%rax Which is all well and good. However, what if I'm writing a template library that requires a callback of some sort with a specified argument list and the user of the library is expected to know what function they want to call at compile time? Then I would like to write my template to accept a function literal as a template parameter. So, similar to template <int int_literal> struct my_template {...};` I'd like to write template <func_literal_t func_literal> struct my_template {...}; and have calls to func_literal within my_template compile to callq <immediate address>. Is there a facility in C++ for this, or a work around to achieve the same effect? If not, why not (e.g. some cataclysmic side effects)? How about C++0x or another language? Solutions that are not portable are fine. Solutions that include the use of member function pointers would be ideal. I'm not particularly interested in being told "You are a <socially unacceptable term for a person of low IQ>, just use function pointers/functors." This is a curiosity based question, and it seems that it might be useful in some (albeit limited) applications. It seems like this should be possible since function names are just placeholders for a (relative) memory address, so why not allow more liberal use (e.g. aliasing) of this placeholder. p.s. I use function pointers and functions objects all the the time and they are great. But this post got me thinking about the don't pay for what you don't use principle in relation to function calls, and it seems like forcing the use of function pointers or similar facility when the function is known at compile time is a violation of this principle, though a small one.

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• How can I prevent a ToggleButton from being Toggled without setting IsEnabled=False

  - by Bryan Anderson

  I have a list of ToggleButtons being used as the ItemTemplate in a ListBox similar to this answer using the MultiSelect mode of the Listbox. However I need to make sure at least one item is always selected. I can get the proper behavior from the ListBox by just adding an item back into the ListBox's SelectedItems collection on the ListBox.SelectionChanged event but my ToggleButton still moves out of its toggled state so I think I need to stop it earlier in the process. I would like to do it without setting IsEnabled="False" on the last button Selected because I'd prefer to stay with the Enabled visual style without having to redo my button templates. Any ideas?

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• building a website

  - by Ant

  Not sure if this is the right place to post this, or if it should be under programmers.stackexchange... Anywho, a couple of my friends run a business and they asked me to build them a public website. It will only be used for information about the company with soe pictures. No transactions will be involved. Right now I work for a company where I build internal websites, and do alot of backend programming in C#. I understand html, css, jquery, etc. so I feel like I am completely capable of building a website for them. However, I do not know all the basic knowledge to building one. For example, where should we host the files, what type of security issues do I need to be aware of, what's the best software to use for developing websites (I use visual studio at work), where can I find some design techniques, etc. Any help is appreciated.

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• Trying to open a excel template and rename or save to new location

  - by JPJedi

  I get the following error message when I try the following: Dim XL As New Microsoft.Office.Interop.Excel.Application XL.Visible = True XL.Workbooks.Open(XLTemplatePath) XL.SaveWorkspace(XLSaveReportPath) XL.Workbooks.Close() XL.Workbooks.Open(XLSaveReportPath) "Excel cannot open the file 'ContactReports.xlsx' because the file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file." What I would like to do is Open a excel file that is the XLTemplatePath and the either rename or save the file at the XLSaveReportPath and then use that renamed/saved file to fill the report out. I am using Visual Studio 2008 in VB.NET

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• TToolButton Height Grows with Style = tbsDropdown

  - by smartins

  I noticed that the height of a TToolButton increases when you set the button's Style to tbsDropdown. I can understand the width increasing, so the button has space to draw the down arrow, but I'm not sure a height increase is necessary. Steps to reproduce the issue (Delphi 2010, Windows 7 x64): Add TToolbar to a form, ShowCaptions=True Right click to add a button to the Toolbar Set button Style=tbsDropDown and notice the button grows in height The same height increase happens when there are images assigned to the toolbar, in which case there is already plenty more vertical space available in the button to draw the drop down. Here's a visual example: Is there a workaround for this without hacking the VCL, or is this hardcoded into the Windows control?

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• Can I create a dataset XSD without using the designer?

  - by Per Åkerberg

  Hi everyone, I want to be able to create the XSD file for my typed dataset without using the visual studio dataset designer. Is there a way to do this using for instance a command-line tool? There is some magic happening when a table is dragged from the server explorer to the design surface, but where does that magic come from? To add some flavour to the mix, I am using DB2 LUW 9.1, but I am guessing that the process is similar using other database vendors. Once I have the XSD I can use XSD.exe to create my .CS class, no problem. Thanks for any help or suggestion! /Per

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• Jquery hover function doesn't work for a table...

  - by chandru_cp

  I dynamically added rows to a table but it doesn't seem to take hover effects given in jquery... Here is my code, <table id="chkbox" cellpadding="0" cellspacing="2" width="100%" class="table_Style_Border"> <tr> <td style="width:150px" class="grid_header" align="center">RackName</td> <td style="width:150px" class="grid_header" align="center">LibraryName</td> <td style="width:200px" class="grid_header" align="center">LibrarianName</td> <td style="width:200px" class="grid_header" align="center">Location</td> <td style="width:1%" class="grid_header"></td> </tr> <? if(isset($comment)) { echo '<tr><td class=table_label colspan=5>'.$comment.'</td></tr>'; } ?> <?php foreach($rackData as $key => $row) { ?> <?php printf('<tr class="%s">', ($key % 2) ? 'rowcolor' : 'alternaterowcolor'); ?> <td align="left" class="table_label"> <?=$row['rack_name']?> </td> <td align="left" class="table_label"> <?=$row['library_name']?> </td> <td align="center" class="table_label"> <?=$row['librarian']?> </td> <td align="center" class="table_label"> <?=$row['location']?> </td> <td align="center"> <input type="checkbox" name="group" id="group" value="<?=$row['rack_id']?>" onclick="display(this);" > </td> </tr> <? } ?> </table><div align="right" class="pagination"> <?php /*?><?php echo $links;?><?php */?></div> <script type="text/javascript"> $("#chkbox").hover(function() { $(this).addClass("resultshover"); }, function() { $(this).removeClass("resultshover"); }); </script>

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• Prevent painting of .NET form while form is loading?

  - by dvcolgan

  Is there a way to turn off all visual updates to a .NET form while I am manipulating it? When my program first loads, for example, I set the tab control to the tab that was last open. The user can see the program switching tabs. I have looked into SuspendLayout and ResumeLayout, but either I don't understand what they are doing, or I am not using them correctly, because they don't seem to have any effect. Someone told me that there used to be a way to turn off paint events in VB 6. Does this still exist in .NET?

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• Why doesn't my binding update whenever EditingElementStyle AND ElementStyle are set to a custom styl

  - by Pakman

  In my Visual Studio 2010 WPF application, I have the following (simplified) style: <Style x:Key="MyStyle" TargetType="{x:Type CheckBox}"> <Setter Property="Background" Value="Blue" /> </Style> If I use it as the ElementStyle AND EditingElementStyle in my DataGridCheckBoxColumn: <DataGridCheckBoxColumn Binding="{Binding IsEnabled}" ElementStyle="{StaticResource MyStyle}" EditingElementStyle="{StaticResource MyStyle}" /> Then my binding, IsEnabled, does not toggle when I check/uncheck a row's checkbox. If I remove either ElementStyle, EditingElementStyle, or both, then the binding updates no problem. Why is this?! Note: sometimes clicking around will produce an update to the binding (detected via debugging) - this is not the same as clicking another row to "commit" the value, though! Thanks!

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• Cannot implicitly convert type ... to ... problem

  - by Younes

  I have this code: public static IEnumerable<dcCustomer> searchCustomer(string Companyname) { TestdbDataContext db = new TestdbDataContext(); IEnumerable<dcCustomer> myCustomerList = (from Customer res in db.Customers where res.CompanyName == Companyname select res); return myCustomerList; } And whatever i try i keep getting the convert error. Error 1 Cannot implicitly convert type 'System.Collections.Generic.IEnumerable<ConnectionWeb.Customer>' to 'System.Collections.Generic.IEnumerable<ConnectionWeb.DAL.dcCustomer>'. An explicit conversion exists (are you missing a cast?) \\srv01\home$\Z****\Visual Studio 2008\Projects\ConnectionWeb\ConnectionWeb\DAL\dcCustomer.cs 63 20 ConnectionWeb I want to try get myCustomerList to keep the values in an enumerator and return it.

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• How to manage toolbars with mvvm and WPF

  - by Michael Stoll

  I'm looking for a smooth method of managing toolbars (and menus) with mvvm in WPF. Consider an UI with tabbed workspaces and heterogenous content (like Visual Studio). There the toolbars should be hidden or visible depending on the active tab. How would you design the view viewmodel for the toolbars? I'd use a collection of toolbar-viewmodels and bind the ToolbarTray to it, but afaik that's not possible. Any recommendations are apreciated. Links to samples, best practice papers, etc. are welcome.

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• Why does an EXE file that does *nothing* contain so many dummy zero bytes?

  - by Lambert

  Hi, I've compiled a C file that does absolutely nothing (just a main that returns... not even a "Hello, world" gets printed), and I've compiled it with various compilers (MinGW GCC, Visual C++, Windows DDK, etc.). All of them link with the C runtime, which is standard. But what I don't get is: When I open up the file in a hex editor (or a disassembler), why do I see that almost half of the 16 KB is just huge sections of either 0x00 bytes or 0xCC bytes? It seems rather ridiculous to me... is there any way to prevent these from occurring? And why are they there in the first place? Thank you!

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• XAML Namespace http://schemas.microsoft.com/winfx/2006/xaml is not resolved

  - by Justin Poliey

  I'm using Visual Studio 2010 Express, working on a Silverlight 4 project in C#. This started happening all of a sudden in my project, I get the error that this XAML Namespace is not resolved: XAML Namespace http://schemas.microsoft.com/winfx/2006/xaml is not resolved If it helps, here is the section of the XAML file in which the error is being raised: <ResourceDictionary xmlns:my="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:GetGlue="clr-namespace:GetGluePlugin;assembly=GetGluePlugin" xmlns:System="clr-namespace:System;assembly=mscorlib" xmlns:utils="clr-namespace:Seesmic.Sdp.Utils;assembly=Seesmic.Sdp.Utils"> What could the problem be?

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• OracleDataAdapter returns no rows, but the query string works in SQLDeveloper

  - by belzebu

  visual studion 2008 oracle db 11.1.0.7 oracle client for .NET I have a relatively simple query, that selects the rows from across multiple tables (up to 4) using joins. OracleDataAdapter returns no rows for the only dataset's table, but if I copy and paste that query in SQLDeveloper then I get the desired results. I can get the data from other tables using the adapter with no problem, but it seems like it struggles with the bit longer selection query (string length is ~ 300 (not that much at all)) Connection string for the connection is 100% correct. Any ideas? thank you...

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