While I reading a sample I found this code which I could not Find its functionPrivate Sub LoadList(ByVal lst As ListBox, ByVal typ As Type)lst.DataSource = System.Enum.GetNames(typ)End Sub Actually I understood that This code create a method to do some thing as I think to list some thing but what is DataSource and what isSystem.Enum.GetNames(typ) and I never created a method before with (ByVal 1st As ListBox, ByVal typ As Type)
View 2 RepliesIm hearing about this, can someone explain it to me or please show some basic code of Lambda with explanation.
View 2 RepliesDim conn As New SqlCeConnection, in the position marked **, it makes the program fall over on the cmd.prepare statement: requires an open and available connection
Public Class Form9
Dim compactStr As String
Dim conn As New SqlCeConnection
[code].....
How to add my explanation to auto finish in user classes or enum etc?
View 3 Replieswith the code
Marshal.GetLastWin32Error
I obtain a number.... but WHERE can I find an exhaustive textual explanation relative to the number?
I'm trying to add a control on my form and each time an error pops up : "Failed to import the ActiveX control. Please ensure it is properly registered". I'm currently upgrading from VB6 to VB.NET (VB2010 running on Win 7).I installed vb6 on my win 7 PC and i can still add that control on any form - so definitely the OCX is properly registered. My guess here is that VB.NET is unable to create a COM wrapper for that OCX.
View 1 RepliesFor some reason this error started popping up today on one of my projects.[code]...
If I go into advanced compile options and change it to not generate and debug info, my project compiles fine.
I have tried setting the permissions on the Release folder to full for everyone, so I would assume it's not a permissions issue. Also, I don't see anything in my log files that would provide me with more information about the issue.
What is the Best way to create scheduler ?
I can think two ways,
1) to create endless loop that keep checking for time of day, so if i have an event (stored in my DB) that should be execute @ 14:30 the loop will compare in every loop the current time against the DB time so when the current time will be 14:30 the event will be executed
2) the same as above just using Timer instead of endless loop.
the problem is that both methods seems to be inefficient because at least 95% of the checks will be for no use.
so is there any methods or some way in VB.NET to raise an event in a specific hour without keep checking the current hour every second ?
Suppose a dll file is referenced by a project. To step into the dll code, I added the corresponding project to the solution.But I found the program still can not go to the internal code of that dll project.
View 4 RepliesFollowing this tutorial: http:[url].....It works in a test project of mine, but in my production project I get the following error: Server Error in '/products' Application.
Unable to create type 'Photocreator.ThemedPageAdapter'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Exception: Unable to create type 'Photocreator.ThemedPageAdapter'.
Source Error: An unhandled exception was generated during the execution of the current web request.Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[Exception: Unable to create type 'Photocreator.ThemedPageAdapter'.]
System.Web.Configuration.HttpCapabilitiesBase.GetAdapter(Control control) +889
System.Web.UI.Control.ResolveAdapter() +214[code].....
This appears on all pages, both projects are using framework V4.
None of the explanation in the forum have worked, even though this has been asked many times.[code]It has been built, and registered with regsvr32. It returns the error message 'Entry point not found'.VBA recognises the Function but cannot run it.
View 5 RepliesWhenever i try to press a button on one form to bring up this one other form i get the error:
"An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object."
I am using trial version of VS2008 in which I am not able to create tabs for pages
View 4 RepliesI want a textbox to be checked for specific characters. I can use: with textbox1.text If .contains("a") or .contains("b") or .contains("c")...etc... then...
View 7 RepliesCan someone explain to me what this is doing.
[code]...
i am new to asp.net and i was told that i need to know UML thoroughly to build successful software, is this correct? i mean cant i just "code and fix" and "model" in my brain. how important is UML and what is the best way to learn it?
View 3 RepliesHow to display zeros after decimal place in numbers in Listbox?
View 3 RepliesI have used Visual Basic 2008 for a while now and i have never came across this problem, when i try to build my application i get the following two errors...
Quote:
Unable to copy file "objReleaseParent Pro.xml" to "binReleaseParent Pro.xml". The file or directory is corrupted and unreadable.
AND
Quote:
Unable to create XML documentation file 'E:Parent Pro - TRIALParent ProobjReleaseParent Pro.xml': System Error &H80070570&
I can run in Debug no problem, but i need to publish to a web server and i get the same problem...
I have a project with requirements to generate a single executable file with no dependencies that will automate the submission of data to a WCF service based on command line parameters passed to it. As a result, I cannot configure the WCF binding and quotas in an App.config file, so I am generating a BasicHttpBinding in code to use when dimensioning the WCF client object.
However, the WCF service accepts the binary data for a relatively small Excel spreadsheet that ends up being around 30kb, so the default configuration settings for the binding's ReaderQuotas are inadequate. My attempts to increase them in code to 1MB, however, have met with failure each time I make a call to the service.[code]...
i am in a middle of a crucial job and i needed to add a printing code that will be able to print records in a database. what do i do, someone should please help. your assistance is highly welcomed
View 2 RepliesI am having an issue getting my code to work. It is not showing my Look-Up Button for me to calculate the rate based on the weight and zone and it continues to constantly show that I have an error that I cannot seem to correct.
[Code]...
I have a custom window form control contained within its own project that is referenced in the solution's main project. I am currently get an error stating: "Could not load type ... because format is invalid." The type in question is actually a structure. I get the general problem in that for some reason the struct can't be obtained from its assembly, but I don't quite understand what is meant by "format is invalid.". I originally had the solution running on a full Win XP machine before transferring to my Win7
View 1 RepliesI'm writing a program for my algebra students to practice integers.Stuff like....
3-6
-4 + (-5)
3(-4)
-15 � 3
etc.
I want to show an explanation and for the addition and subtraction, I want to show it on a number line. For example, if the problem is 3 - 7, the number line should show and arrow to that goes right to 3, and then left 7 units (starting from 3). Then the student can see that the answer is -4.I could probably do this with some string manipulation, but what would be the easiest way to do it in a picture format? Maybe a bitmap.
I'm new to VB.NET, and have set myself a little challege to learn VB.NET, I was wondering if you you guys new any really good tutorials on how to create a effective MDI Text Editor?, Ive been able to create a simple text editor, however the next step is to use the MDI to be able to have mulitple windows within one form
View 5 RepliesThe below code is suppose to create a database and a table with a column "FirstName" which is assigned a value "James"
Imports System.Data.SQLite
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
But for some reason the app only creates a a database which has a size of 0 bytes. Why is it not working . I am using I am using SQLite ADO.NET Provider. , VS 2010, Winforms
I am unable to create or open a project in Visual Studio. the error message is Invalid URI: The format of URI could not be determined.
View 2 RepliesI've tried to incorporate this code in my app and can't figure out what the missing link is? Lotsa experimenting and head scratching later, I'm coming here to the forum for help. The dialog opens and allows me to select the file saved earlier,except the file doesn't open. I can't figure out the missing code which goes at the comment "insert code to read stream here." The code:
[code]...
does it have something to do with StreamReader.IO ?
Running off my laptop: Visual Basic 2010 Express & SQL Server 2008 . I've successfully been able to use the connection wizard to connect to my database in vb.net and read/write data using datasets/tableadapters/binding_source etc.
Now I am trying to create an SQL connection via code to connect to my database to do some more complicated queries. I was successful in being able to connect to my database with SQL, but by doing so it produces an error when it tries to run any .Fill() methods from my TableAdapters below. The error produced is the following: "SqlException was unhandled. Cannot open user default database. Login failed. Login failed for user 'Chris-PCChris'".
If I remove my SQL connection code, the TableAdapter.Fill() methods will work fine.
[Code]...
Dim fs As New FileStream("C:Womanizer2.m4a", FileMode.Create)
Dim writer As New BinaryWriter(fs)
Dim reader As New StreamReader(networkStream)
'Dim send As [Byte]() = reader.ReadBytes(fs.Length)
[code]....
These are two code blocks from the two programs I have wrote. The first is the server program that receives a connection and writes the file to disk. The second is the Client program that sends the file to the server to be written to disk.As it is - it hangs. I did once get it to write to the disk - but the file was twice the size of the original. what objects to use for transferring a file over a TCP IP network connection with TCPClient and TCPListener.
This program is a small ADOX database with a single data entry Form. Originally written in VB 2005, it was copied into the VB 2008 Project folder. Opening the file in the IDE, it went through the Conversion process, nevertheless, because of the following error detailed below, the program will not accept any changes.
Error List: Warning 1 Unable to find manifest signing certificate in the certificate store. AppointmentsMissed (<the project's name) Under Security in the project's Properties Window these suggestions are made: Visual Studio was unable to determine the Code Access Security (CAS) permissions that are applicable to your project. The most likely cause is that your project references a strongly-named assembly that defines custom permissions, but that is not properly installed in the global assembly cache (GAC).
To correct this, try the following: 1. Ensure that any custom permissions defining assemblies referenced by your project have been properly installed to the GAC. If any of these assemblies have been rebuilt or have had their version numbers modified, you must install the new assemblies in the GAC. 2. Restart Visual Studio.