How Try Statement Works

Feb 22, 2009

im just wondering how the try statement works. what i want to do is this: allow user to enter link eg "calc.exe" then open that link using shell like this: [code] if the user enters a name that the system doesnt recognises it glitches, so i thought i would try the try statement.

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SQL Statement Doesn't Work - INSERT Statement Works Fine In The Form Load But Not In The Button Click Event?

Oct 14, 2009

See

Public Class Form1
Dim sql As String
Dim conn As New OleDb.OleDbConnection
Dim da As New OleDb.OleDbDataAdapter

[CODE]...

The problem, The INSERT statement works fine in the form load but not in the button click event?

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How For Each Loop Statement Actually Works

Dec 8, 2011

I am trying to understand how a for each loop works and am having some trouble. I am trying to create a program that will query a sql database, pull back the information and store it. I currently having it writing to a text file, and would like to take the information (such as name) and compare it to another list where the name is equal. However I am not exactly sure how the for each statement really works. I have looked at numerous sources and it doesn't make since to me as you can probably see from what I have put in here.

HTML
Public Class Form1
Public Sub newarrest()
Dim strsports As New System.Collections.Generic.List(Of String)
Dim employeelastname As New System.Collections.Generic.List(Of String)
Dim cnPodaci1 As New SqlConnection
[Code] .....

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If Statement Only Works In FormLoad

Dec 31, 2009

I'm having trouble getting a If Statement to work on a button.It will only work when on the "Form Load" section.Heres the If statement I'm trying to put on the button press event.[code]

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Sql Statement Gives A Error While It Works Fine In Access?

Dec 8, 2009

I'm creating a db tool for automatic database repairs i have the following sql statement:

[code]...

Where the 'BrokenDbFile' is the location of the db where data has to come from and the 'sqlString' = the access statement.it gives a error when i put it in a try the exception is of type OleDbExceprion and de message text is "De instructie INSERT bevat een syntaxisfout" in Dutch Where it says that the syntax of the INSERT INTO is not correct. but when i paste the string from my inteli snce into access it works fine.

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Sql - SELECT INTO Statement Not Working, But Works When Ran Directly In Access

Jun 15, 2011

I am converting old VB6 code to VB.NET with ADO.NET (OleDB). This is my query that will create a blank table when ran in VB.NET, but then works when ran directly in Access. This code presumably also works in VB6, as I am using the same SQL:

SELECT qryAsOf.name, qryAsOf.type, 0 as opt, 0 as swap
INTO qryCon
FROM qryAsOf
LEFT JOIN qryLinked on qryAsOf.c = qryLinked.lc

I feel like this has something to do with the left join and select into being together, but like I said it is only VB that has an issue with it, Access handles it perfectly.Without the INTO line, this query returns all 600+ rows.

This DOES NOT WORK:

cm.CommandText = "CREATE TABLE qryCon (etc...)"
cm.ExecuteNonQuery()
cm.CommandText = "INSERT INTO qryCon SELECT ..." '(rest of query above without INTO line)
cm.ExecuteNonQuery

This DOES WORK:

cm.CommandText = "CREATE PROC qryCon AS SELECT ..." '(same select as above without INTO, again)
cm.ExecuteNonQuery

The CREATE PROC that does work is fine, except I need to insert data into it later, so I get errors about how I need an updatable table. I really want the end qryCon to be a table, but I can't seem to get that to work :(

*However, when I do something like this (using the stored proc (renamed) above which, if viewed in Access, is full of data)

cm.CommandText = "SELECT * FROM storedProc"
dr = cm.ExecuteReader

[code]....

This DOES NOT WORK! By the way, I removed the concatenation in the query for readability. It is correct in the actual project.

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DB/Reporting :: Updates Statement Works In Query Builder But Not When Running

Mar 2, 2008

I have developed an ASP page in Visual web developer that retrieves the data usingan AccessDataSource object. I have the following UPDATE Command:

[Code]...

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Link From Button - When Sheet1 Is Selected, It Works, But When Sheet2 Is Selected, Not Works

Jan 5, 2012

I have a spreadsheet with this code:

'insert link
sheet1.Hyperlinks.Add(sheet1.Range("P1"), "http://http://www.vbforums.com", "")
the code of the button (ribbon)

[CODE]...

When I press the button, it connects to the web site. when the sheet1 is selected, it works, but when the sheet2 is selected, not works, why? the path is sheet1,What's wrong?

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Code That Doesn't Works Runtime But Works Step By Step?

Jun 26, 2010

this is my code:

Dim WB As WebBrowser
WB = GetPage("http://speed.travian.ir/a2b.php?z=" + VillageID.ToString + "&c=" + Type.ToString + "&" + AttackParams)

[code].....

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If <expression> Then <statement [:statement]> Else [statements] In Concrete Form?

Jan 1, 2010

I was convinced that If <expression> Then <statement [:statement]> Else [statements] in concrete form of If a = b Then SayHello() Else SayBye() End has sense. I read article on msdn on If-then-else, but I forgot why I was reading, so I concluded, that snippet above means this

If a = b Then HelloIsSaid : IsNotEnded Else ByeIsSaid : IsEnded But I have tested it now, and I see, that Else without statement is nothing more than decoration. It would be pretty good if it had function I described. Do you think its good request? Or do you know any circumstance where this Else has some function?

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Making A Next Statement Into A Loop Statement In Visual Basic?

Jun 8, 2009

y friend and I are re-learning Visual Basic, and we are stumped on this bit of code.

For intAsterisks As Integer = 0 To intLine - 1
lblAsterisks.Text = lblAsterisks.Text + "*"
Next

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Sql - Perform An Inline Select Statement In A LINQ Statement?

Jun 24, 2011

I have the following SQL:

[Code]...

I want to put it (the select count statement) in this LINQ statement so I can get the sales count in my linq statement: Dim TheLeads = (From L In DB.Leads Where L.IsDeleted = False Select L).ToList() Is this possible to do in LINQ?

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Change The Exit Statement To A Continue Statement?

Feb 23, 2009

add an if statement and an exit statement to my do loop that exits when my future value (FV) is greater than 1000, then to change the exit statement to a continue statement so my loop will continue even though my fv is greater then 1000, point is to get this to run even though my if statement doesnt do anything. problem something wrong in my code and an exception error (xception of type 'System.OverflowException' occurred in mscorlib.dll)

so can someone show me where or why I have an error is, what am I overthinking now! I could use a hint, OMG i could use a tutor for that matter

[Code]...

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ElseIf Statement Into A Select Case Statement?

Jun 23, 2010

A co-worker wants to convert the following IfThenElseIf statement into a Select Case statement.
Explain why this is not possible.

If temperature = 100 Then
X = 0
ElseIf population > 1000 Then
X = 1
ElseIf rate < .1 Then
X = -1
End If

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SQL Statement :: Nearly Working Just Cant Get Form Values In Statement?

Aug 4, 2010

I cant get this SQL statement to insert any of the values in the form to add to the database

sql
sql = "INSERT INTO prevresults (ExamDate, ExamTime, CorrectAnswers, PassPercentage) VALUES (date.now, time.now, rightanswers, percentage.text)"

[code]....

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Return Statement Which Is True In An If Statement?

May 24, 2012

Return statement which is true in an if statement

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Break Up The Code In A Method Body Into Statement By Statement Symbols/"tokens"?

Apr 22, 2011

I'm writing something that will examine a function and rewrite that function in another language so basically if inside my function F1, i have this line of code var x=a.b(1) how do i break up the function body into symbols or "tokens"?I've searched around and thought that stuff in System.Reflection.MethodInfo.GetMethodBody would do the trick however that class doesn't seem to be able to have the capabilities to do what i want..dit 2:basically what I'm trying to do is to write a program in c#/vb and when i hit F5 a serializer function will (use reflection and) take the entire program (all the classes in that program) and serialize it into a single javascript file. of course javascript doesn't have the .net library so basically the C#/VB program will limit its use of classes to the .js library (which is a library written in c#/vb emulating the framework of javascript objects)

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Exceptions - Can The "Throw" Statement Exist In A Block With No Try/catch Statement

Oct 5, 2009

how to use them then before, but am still a little confused with a few aspects. Here goes:

1.) Lets say you have a method that checks for a certain condition(s) and if it fails Throws an exception. Does it have to be in a try/catch block? Meaning can the "Throw" statement exist in a block with no try/catch statement?

2.) Now lets say we have a method that has a try catch block and in it there is a throw statement. When the throw statement is executed does it first try to find an appropriate catch block in the same method or does it immediately go back to the calling method without looking at the catch statements in the current method where the exception was thrown?

3.) I created a custom exception class that inherits from ApplicationException. Next I created a method which has a catch block that catches this type of exception and does some action. Is the System(i.e CLR) smart enough to throw an exception of this type, or does it only throw exceptions from SystemException?

4.) I know that some people are more liberal in their use of exceptions and others use it more sparingly when truly strange stuff happen like the DB going down. I am writing code where I am getting some info back from the database, converting it and then storing it. Sometimes there might be data that comes back from the database and other times the field is empty and the Null value comes back. Therefore in the instances where Null comes back from the database I should not convert the value to anything, since I will get an error. What should I do in this situation? Should I let the CLR throw the exception when it goes to convert the Null value or should I check for the Null value and if it exists not convert?

5.) In general when I throw exceptions, is it sensible to only throw exceptions of the type Application Exception or are there instances where the programmer throws exceptions of the type SystemException?

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Make A 'like' Statement Or Use Some Kind Of Wildcard To Make The Statement Not Case Sensitive?

Jul 11, 2010

I'm building a listview search feature in my app. (See the code below). It works really well, except if you search "T" then the code removes all items, if you search "t" then it removes every item except for those starting with "t". Is there any way to make a 'like' statement, or use some kind of wildcard to make the statement not case sensitive?

For Each itm As ListViewItem In ListView2.Items
If itm.Text Like TextBox1.Text & "*" Or itm.SubItems.Item(1).Text Like TextBox1.Text & "*" Then
Else

[code].....

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"End Of Statement Expected" Error In VB 2010 In A Do While Statement?

May 2, 2012

I have a line of code that is working in one statement but not the second statement. I'm not sure what I'm doing wrong, I am learning slowly but surely, and it is by no small margin because of the ave found here =) The error is occuring in the intResult = intSelection x intCount line of the SECOND Do While Loop.

The blue squiggle line is under "intCount" just FYI
Dim intSelection As Integer
Dim intCount As Integer = 0

[code]....

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.NET Works But Not C#

Feb 26, 2012

I have created lots of applications with visual basic 2008, tested them on many other computers, worked like a charm. After I moved to 2010, all my applications compiled, ran without a problem even on different machines (worst case scenario was that some older PCs needed the 4.0 framework to be installed first). Anyway suddenly I ran into a very weird problem which I cant figure out.I have Visual C# 2008 (Express Edition) on this machine installed and everything ran/compiled flawlessly but when I tried the application on a different computer, it can't even start. It crashes as soon as you attempt to run it and displays that 'Application Stopped Working' error.

I also tried to compile it as Release, then start the exe .. still the same problem. Sorry again for asking this on a VB forum, I just started playing around with C# after VB and didn't know where to ask.Aditional Info: Visual Basic 2008 and 2010 programs work perfectly on the same machines on which Visual C# 2008 doesn't. (I would be glad if some one could at least re-direct me to somewhere else )

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SQL Works MDB Does Not?

Jul 21, 2009

UserLogin.zip Starting off with a very simple user database with encryption based on [URL]..Updating to an SQL database WORKS FINE using the SqlDB classes. Updating to a 2003 Access MDB DOES NOT - when I use OleDB Classes. They are almost identical. I am getting an error ""Operation must use an updateable query", but all the articles on this do not seem relevant. I need to get the MDB working.

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Components - "if" Statement Shows An Error " Statement Cannot Appear Outside Of A Method Body"

Jan 29, 2009

I have the following vb code which works as expected when it's in a code-behind page. I tried to move it to a shared or component page since I will need to use it in multiple pages:

Imports Microsoft.VisualBasic

Public
Class DetTime
'Determine eastern time

[CODE]...

However the "if" statement shows an error " statement cannot appear outside of a method body" and the Microsoft solution is to "move statement into a procedure or subroutine"

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.net - COM Object Only Works In It Not C#

May 10, 2011

I have a COM object that works fine in VB.NET, but not in C#. Both projects are .NET 4 console applications. The COM object loads in C#, but the methods don't return any values. Why would it work in VB.NET and not C#?

[Code]...

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Can't Get It Works In .Net 2003

Nov 9, 2009

I have the following code written in VB. It works in VB 2008 Express But not VB .Net 2003?

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Completed App Only Works For Me?

Mar 30, 2011

I just completed my app and used advanced installer to make a setup of it, i sent it to my brother for him to test but when he runs it and tries to sign in he gets these errors

[code]...

When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the computer rather than be handled by this dialog box.now i think it means that it cant find the mysql connecter and data and stuff but the user shouldn't need to have that right? it should come with the app to make it work for everyone

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Does ADO Works On VB 2008

Aug 17, 2009

does ADO works on VB 2008 ?i have this error when i tries to run this code

'Item' is 'ReadOnly'

and below is my code:

rs.AddNew()
rs!("pwd") = TextBox1.Text (it gives me the error here )

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GetScrollBarInfo API Don't Works?

Dec 3, 2011

I'm trying to know if the scrollbars (in my case, the horizontal scrollbar) are showed in the main access window. I use GetScrollBarInfo.There are 2 days I'm, searching info about the function and the parameters, but they are hard to find.I can only find general descriptions of the API.I found some constant values in the ApiViewer 2004.

Here is my API-calling code (in a form class-module):
'vede se la scroll bar orizzontale visibile
Dim void As Integer

[code]......

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How The Application Works

Jun 8, 2011

I am a final year computer science student and i was confronted with this topic: Design, development and implementation of an efficient Bandwidth management system. i code with Vb.net and microsoft SQL 2008 as my database engine. honestly i've not written such application before, so i need a guide how the application can be built(especially the interface).please am not asking for the source code(if there is any), i only need a detailed flow on how the application works.

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How ViewState In ASP.NET Works

Mar 1, 2009

I thought I knew how ViewState worked, but I was wrong.I don't understand why the following ASPX page preserves the value typed into the TextBox after clicking on the Button?(ViewState is disabled for both the page and the TextBox.)

[Code]...

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