Here are my interface and it's implementation class file. While implenting service function there is a chance to get 3 exceptions.
I need to handle these using a custom fault contract. how to implement 3 exceptions under one fault contract.
Interface:
Function GetEntities() As String
Class file that use the service Interface:
Public Function GetEntities() As String
[Code].....
I have a requirement for a timer that has the following behaviour:
Millisecond accuracy I want the tick event handler to only be called once the current tick handler has completed (much like the winforms timer)I want exceptions on the main UI thread not to be swallowed up by the thread timer so this requires Invoke/Send instead of BeginInvoke/PostI've played around with CreateTimerQueueTimer and had some success but at the same time had problems with code reentrance and/or locks when deleting the timer.
I decided to create my own timer so that I could get a better idea of what is going on under the hood so that I can fix the locking and reentrance problems. My code seems to work fine leading me to believe that I may as well use it. Does it look sound? I've put in a check if the timer is deleted to make sure that the deletion is complete before the timer can be created again. Does that look ok?
Note: I should say that I call timeBeginPeriod(1) and timeEndPeriod(1) inorder to achieve the millisecond accuracy.(The following code is converted from vb.net to c#, so apologies for any missed mess-ups}
ETA: I've found a problem with it. If the timer is running at an interval of 1 millisecond, and I call, say, Change(300), it locks up @ while (this.DeleteRequest). This must be because the TimerLoop is in the this.CallbackDelegate.Invoke(null) call.
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With String.Format() it is possible to format for example DateTime objects in many different ways. Every time I am looking for a desired format I need to search around on Internet. Almost always I find an example I can use. For example:
String.Format("{0:MM/dd/yyyy}", DateTime.Now); // "09/05/2012"
But I don't have any clue how it works and which classes support these 'magic' additional strings.So my questions are:How does String.Format map the additional information MM/dd/yyyy to a string result?Do all Microsoft objects support this feature?Is this documented somewhere?Is it possible to do something like this:String.Format("{0:MyCustomFormat}", new MyOwnClass())
I have been developing in VB.net for a cople of years now. I really miss the increment and decrement operators for integers that I grew attached to while using Java and C#. I have seen posts explaining how to implement a custom operator for a class that I have written, but I have not seen any examples of how to do it for a basic type like Integer.[code]....
View 1 RepliesI was wondering how to implement a custom character set for use by an application, i.e. hex bytes that are read by the program then converted and displayed in the window. If this requires first converting the bytes in a file to an already implemented character set, I'm cool with it - I'll go with whatever works or works best. I'm writing with VB.NET 2010, and running Windows 7 Home Premium x64, by the way.
View 2 RepliesI am looking for ways to implement custom user-roles in windows application with vb.net. I got a database table called Roles with Administrator and User entries. User cannot see some of the form data. In ASP.NET MVC we can do like.
[Authorize(Roles = "Administrator")]
public function GetAccount() as Array
End Function
i'm trying to implement my own custom titlebar using a picturebox. can anyone tell me why my right click won't open the system menu?here's my code:
Imports System.Runtime.InteropServices
Public Class Form2
<DllImport("user32.dll")> _
Public Shared Function ReleaseCapture() As Boolean[code]......
my problem is that I have a table " Contract" in sql 2005 Database,and each contract have an Expiration date,So in my application I want to show a Warning to the user a day before the contract is expired,and at the same time this warning have a 2days limit,and if the warning was triggered "Saturday" or "Sunday" the limit becomes 4days. and I'm using vs2008 and sql 2005. Ps: I'm not asking for code,
View 8 RepliesCan you guys share some techniques and methods on how you validate dates, where and how to do and stuff like that.Like If you were to set a new employee's five month contract, and having him/her account terminated on contract ending.Let's say I built a Lan-Based Management Information System and a small application that will automatically routes/scan every dates in the database every 1 mili-second using a Timer Control in VB to identify which date has been reached to dismissal phase.
View 4 RepliesI have a situation where my program saves a file on a regular basis under certain circumstances. Every once in a while, power will fail and the file being written will be gone, I assume because it was in the process of being written when the power failed.So I need a solution that will prevent that situation while still using just one primary file to save the data.
My proposed solution is to write the file to a temporary file, and then copy the temp to the original and then delete the temp. Therefore in the event of a power outage, either the the original or the temp file will always be there. Are there any obvious problems with that method?
We all know what a Static variable means! Recently I came across a problem that I have no idea about! I even don't know whether I'm wrong somewhere or that is a VS fault. Whatever it is, I can't figure out the cause. Anyway, I simply opened a VB 2008 project and added 2 Windows forms to it: Form1 and Form2. Then I set Form1 as a MdiContainer by setting its IsMdiContainer property to True. Then I added a CommandButton to Form1 and put this following code into that:
[Code]...
I'm currently working on a VB. Net web service calling another web service running in the mainframe. I was provided with the WSDL file and I generated a proxy class using wsdl.exe. Upon attempting to invoke the method of the mainframe web service using the proxy class, I encountered an exception saying "Conversion from SOAP failed" coming from a line of code in the generated proxy class.
View 1 RepliesI want to maintain a FLAG in Which there is two values of FLAG
1) yes and 2) no
i want that when a form is load a Flag value is yes and The form is close the flag value is no in my back end Database
It is same like sing in person on any web site.
But my Problem is that how can i maintain it any how the my computer is turn off .
i store a database on single computer that is server.but i also want a code for on same computer
So I implemented my own form of Enum static classes so I can associate strings to enumeration values. One of the shared functions in each enum class, GetValue, is used to quickly look up the string value from an internal array via the offset. While all of the enum classes implement the same exact function, the data types of their parameters differ, specific to the enums in each class.
So I come to a point where I want to create a generic class that can use any of the enums by passing it as a generic type parameter. But I cannot find a way to constrain type T in such a way to be able to call each enum's GetValue function. This is where an interface would come in handy, but VB.NET forbids interfaces for shared methods.
I have a base class that I could constrain to, but the base class doesn't implement the GetValue method, and I can't define a generic version of it, because I need to rely on shared properties of each child class in order for GetValue to do its thing.[code]..
I basically have an abstract class that deals heavily with Generics. I need to call a Shared method on the Generic class T. I need to make sure the Shared method is implemented. I could use reflection to check for the implementation and call the method if it exists or throw an exception otherwise. However, since the derived class is not "aware" that it needs to implement this method, I feel that the exception will get thrown more often than not
View 4 RepliesThis is what I would like to achieve:To create a custom messagebox, with varying number of buttons with custom .Text descriptions, and other features. I intended to have a property array that would be redim-ed and have values (.Text values) set by the calling class:
[code]...
I came across this great article on creating a custom datagridview column which creates a graph-like effect in the cells of a custom datagridview column:[URL]..Does anyone know how you would edit this to format the number in the cell as a percentage? And does anyone know how you would set this up to take 0 values which do not create any graph effects at all.I have been trying to do this but keep getting errors.
View 1 RepliesI was trying to block the closing of a custom combo box popup window in my custom DataGrid. The popup window comes by pressing F4 or ALT+DOWN keys in my datagrid which is getting closed if I press the down arrow for the first time, after showing the first value in the combo box as selected. Next time onwards, if I press the F4 key and down arrow, I can move to any item in the popup window and select the item using keyboard and in that case, the popup window is not getting closed till I press the ENTER key or selection using the Mouse. Is there any specific reason for this behaviour or something is missing in my code part? [code]...
View 1 RepliesI was trying to block the closing of a custom combo box popup window in my custom DataGrid. The popup window comes by pressing F4 or ALT+DOWN keys which is getting closed if I press the down arrow for the first time after showing the first value in the combo box as selected. Next time onwards, if I press the F4 key and down arrow, I can move to any item in the popup window and select the item using keyboard and in that case, the popup window is not getting closed till I press the ENTER key or selection using the Mouse.
View 13 Replieshow to specify a custom icon for display in the toolbox window when you create your own custom control? Something other than the dreaded "gearbox" icon.
View 2 RepliesCookies to be stored in folder and on close delete the cookies The ability to watch youtube vids, view images, and play js/flash games good security, no ads?
View 6 RepliesI'm using custom serialization and when the xml is generated it's putting the class name as the root element
Example:
<MyClassName>
<MyIntendedRootNode>
<ObjectType>
[code]....
I'm invoking the serialization by calling xmlserializer.Serialize(writer,Me) so I'm sure that has something to do with it.I've tried putting XMLRoot onto the class, but I think as vb is compiling this partial class with its aspx page, it's either overwriting this property or ignoring it entirely.I'd like to just tell it to either throw away everything it has and use a different root element.
know how to create a custom file association ( a custom extension ) in VB .Net and how to open it on the application
View 1 RepliesI have a Custom Principal class that Implements System.Security.Principal.IPrincipal and a Custom Identity class that Implements System.Security.Principal.IIdentity. So when a user successfully login to my windows form application, I set My.User.CurrentPrincipal = CustomPrincipal, which worked great until I started adding custom functions to my Principal and Identity classes.
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Here's my Application_OnError event sink in global.asax.vb:
Sub Application_OnError(ByVal sender As Object, ByVal e As EventArgs)
Dim innerMostException As Exception = getInnerMostException(Me.Context.Error)
[code].....
I have a custom SiteMapProvider (populated from database) and a custom AuthorizeAttribute (validates current users roles + requested page against Role_Page database) for controller classes.I have to implement the function SiteMapProvider.IsAccessibleToUser(context, node). I also have to implement AuthorizeAttribute.AuthorizeCore(context).How are these two functions related? Isn't there some way to 'attribute' the SiteMapProvider?
Some code:
edit: Might this be a solution (inside AuthorizeCore())? context however is HttpContextBase, and IsAccessibleToUser() only takes HttpContext as parameter.If Not SiteMap.Provider.IsAccessibleToUser(context, SiteMap.CurrentNode) Then
current code:
Public Class CustomValidateAuthorization : Inherits AuthorizeAttribute
Public Sub New()
End Sub
[code]....
I have an ASPX Custom Control which is supposed to load it's properties into an internal collection (defined with PersistenceMode.InnerProperty). Here's the ASPX
<cc:CustomControl runat="server">
<Queries>
<cc:QueryTypeOne ... />
[code]...
how can i get custom menu bar like this (office 2010) example:I need to have custom background and custom hover images. I work in Visual Basic 2010?
View 6 RepliesI have created a custom UserControl, with a custom designer, which contains a Panel which is editable. Any controls dropped onto this Panel will go off-form when an Anchor is set. This was already reported here and acknowledged as a bug:[URL].. Are there any known workarounds? Or available hotfixes for this issue?
I already implemented ISupportInitialize in my custom panel class, where i set the docking, which doesn't help. Here's the relevant code:
[Code]...
With VB.net, I'm coding a simple application to get more used to the new .Net format.
I'd like to save all the information to a 'new' database file. how to create a database on the fly, once that is done i'll be able to connect to it no problem, but actually creating the file is proving difficult to work/find out.
Also, with vb.net and the newly created custom file, how can it be made to automatically open that information with the program?
Is there a method in installation to associate the file type with the new program? How can i check when the program loads if a database file has been 'double-clicked' (rather than just running from the .exe of the program) and proceed to load the data?
EDIT1 - Extra InfoThe windows application has many different fields and content etc, then i need to save that to a file that could later be loaded by 'double clicking'. I assumed the easiest way would be to create a mini-database for each unique file