Repetition For List Of Settings With Unique Variable Names
Aug 12, 2011
this website seems great and this is my first post. Sorry if this has already been answered but I have been searching for a long time. I have a program with a list view in details mode. I have it load column settings (visibility, display index, width, etc.) when the form is opened and save them when closed. There are many columns...about ten so far...like folder, file, size, etc. Is there a way to access variable names from the values of other variables?
[Code]...
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Nov 17, 2009
I'm quite new to Visual Basic - using Visual Studio 2008 and can't seem to find a way to do the following:
I have a few tables in a SQL Server database and have used LINQ to SQL to create classes of those tables.
Here's a cut down example of what I'd like:listbox1 filled with table names - APS, SMPS, WCPC, CFLAPS
Then from the SelectedIndexChanged event, listbox2 should populate column headers of the selected table.
I have no issues getting data from the database, and can access all of these headers through the anonymous type objects created from a LINQ query (eg APS.ID, APS.count etc), but populating a listbox with these variable names rather than the data inside them seems rather elusive.
This is probably a cross platform coding question rather than VB specific, so if you have a solution in C# or whatever I'd be happy if you could let me know.
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Apr 1, 2008
Got a form linked to a database and i have the first column of data appearing in a list box on my form. In the database there are two records with the same value and so, of course, in my list box the value is given twice.How do i remove this repetition from the list box? (still keeping it the same in the database)
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Jun 7, 2012
[Code] Since the continent and region columns contain duplicate values, these duplicates also show up in the treeview. I assume the problem is in the code [For Each dr As DataRow In dta.Rows] because this returns the continent or region for every row in the table (see attached picture). But what would be the correct way to get the unique names for each continent and region to be listed in the treeview? [Code]
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Sep 5, 2011
I am doing work for a client who has lost the source code for one of their VB.Net WinForms applications. The assembly they have is not obfuscated at all. I am trying to recover as much of the source as I can as C# source and have tried several tools for decompiling assemblies, including Reflector, ILSpy and JustDecompile (all the latest versions), but they all produce code with a huge number of errors in them. Because of the large number of errors in the generated code, I am going to ask about the specific errors (in different questions), get more directed answers and in this way try shed some light on why all the tools are having difficulty decompiling this assembly. This question pertains to the fact that the code generated by all these tools always have a large number of invalid member variables (fields) such as the following:
private short $STATIC$Report_Print$20211C1280B1$nHeight;
private ArrayList $STATIC$Report_Print$20211C1280B1$oColumnLefts;
private StaticLocalInitFlag $STATIC$Report_Print$20211C1280B1$oColumnLefts$Init;
why the generated code has these invalid member variables?
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Dec 22, 2009
I am creating files and then allowing the User to browse through the files via a ComboBox. I decided to name each file the current date. In order to create multiple reports each time the application is ran, each report needs a unique name.
The idea is that if they run a report once a day they'll have a unique report each day. But, then I realized that it is feasible that User could run a report more than once a day. So, I decided to create an integer and increment it each time the report has been ran. Then append the file name with that integer. So, report one of that day would show something like this:
12-22-2009_1 and so on.And this works just fine. But, if the user decides to close the app and then run the report later that day, the variable has been reset and no longer works as needed.I'm using a StreamWriter to create the file.
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Dec 18, 2011
is there any way of creating a file in visual basic using a variable as the file name? I have tried using the following but keep getting an error "The given path's format is not supported." ??? I am trying to create a log file of machine use every shift (8 hours) and just want to use the same name for the file with the date and time appended to the end of the file name. the section of code giving me the error is below.
[Code]....
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Jan 13, 2011
I am used to C like languages such as C#. I added a list box with a list of names. In the code behind I added the below code. When I run the code I am getting the MessageBox but it will state "UserName favorite color is " but does not show the color. I thought it might be misspelled or non-matching names but this is not the issue due to the names being correct.
Public Class Form1
Private Sub lstData_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lstData.SelectedIndexChanged
'Declare Variables
[CODE]...
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Nov 7, 2010
I am new to VB.NET 2008 and a few users on this forum have suggested using Generic Lists instead of the old VB6 model of Collections. I need to add to the list of several items to the list, but what is happening it it is changing the first item in the list when I add the second, so there are now of the same item in the list. How do I add unique items to the list? Also, in the collection world, I could define a index of an item by placing the index value into second item of the Add Function.
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Nov 9, 2011
I have 2 List (of T) populated with the following
Dim curweekFolder As String
curweekFolder = String.Concat("c:", curweek_date.SelectedItem)
Dim preweekFolder As String
preweekFolder = String.Concat("c:", preweek_date.SelectedItem)
[code]....
I first wanted to identify which files matched in filename and list those in ListBox1, the following that was suggested on this forum worked very well (I added the minus last 19 characters as they would be different).
ListBox1.Items.AddRange(curlist.Where(Function(fi) prelist.Any(Function(fi2) fi.Name.Length - 19 = fi2.Name.Length - 19 AndAlso fi.LastWriteTime = fi2.LastWriteTime AndAlso fi.Length = fi2.Length)).ToArray)Now I need to populate ListBox2 with the files that do not match in each List (of T), again without looking at the last 19 characters. So for example if the first List (of T) had A.txt, B.txt and C.txt and the second List (of T) had A.txt and B.txt then ListBox1 would have A.txt and B.txt while ListBox2 would have C.txt.
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Dec 17, 2011
I'm trying to categorize articles by stored keywords. I have a list of keywords for a category, and I want an article to get assigned a category that has the most keyword count.
For Each keyword As String In category.Keywords
category.tempCount += Regex.Matches(article.Item("title").InnerXml, Regex.Escape(keyword)).Count
[code].....
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Apr 29, 2009
I am looping through a collection of items. Within that loop I need to set variables but they need to be a variable. I tried using lists but for some reason they don't get set properly. Heres what I have so far...
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Jun 9, 2011
I'm having some problem here. I have a list of files to read and have to append them all to one unique file. the problem is that when i open the first file to read. I read the first line and discard it. when i read the second line, its empty ! but it is not in the original file. what im doing wrong ?
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Jul 3, 2011
I am having so trouble with the ToUpper() procedure with strings. I am using LINQ to find unique values in a list of objects. In that whole process I set the values to compare to all lowercase in order to get a proper list. My goal is to populate a dropdown list with the values. I'm attempting to set the first letter of of the string to uppercase and keep the rest lowercase however the toUpper() procedure is not working?
Private Function FixCase(ByVal strIn) As String
Dim strOutput As String
Dim intStringLength As Integer = strIn.Length - 1
strOutput = strIn.Substring(0, 1)
[code].....
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Feb 24, 2009
I have a List (Of Type) which contains many instances of a class with three properties, IPAddress, AlertDate and AlertTime.There can be many duplicates of IPAddress in this list :-
[code]...
I need to be able to pull out just the latest (by date and time) entry in the list for each unique IPAddress. Is there any simple way of doing this?
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Apr 15, 2012
im pretty much a beginner to using ASP.net and linq to sql but what im trying to do is update a column of a table based on a variable. at the momment i have
Dim db As New sqldcDataContext Dim update As tableName = (From i in db.tableNames _ Select i)
i think this selects everything, how could i have two variables, one to store what table to update and the other what column. is this possible?edit: sorry for being unclear im trying to make this as dynamic as possible so i dont have to type in the exact table/col names. something like this but in the linq to sql syntax.
mysql_query("SELECT * FROM ". $table ." WHERE `" . $column . "` = "" . $data ."");
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Aug 13, 2010
Given the following code:
try
// code1
try
[Code]....
Are there any side effects to naming the two exception variables the same or should they have different names?
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May 20, 2010
how do I DIM a variable's name using previously declared string varialbes? I have been using PERL for processing data stored in text files but I now have a business need to use VB2008. I would like to do something like this:
dim name1 as string = "ABCD"
dim name2 as string = "123"
'here is the part that I don't know how to do - create a 3rd variable name concatenated from name1 and name2:
dim string.concat({name1,name2}), or maybe use a counter in a line like 'dim namex as string' with x being a counter value.
Essentially I want to dim variables using text strings extracted from a file. In PERL I have declared literals and arrays, such as 'my @$name1', which creates an array named with the contents of $name1. In VB2008 I am not sure how to make this work with the DIM statement.
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Mar 29, 2010
I'm trying to reduce as much as I can my VB.Net assembly side, and I just figured out that all variable names were kept unchanged in the actual assembly. Since I tend to use pretty long var names, it adds up and, by running dotfuscator on my assembly, I could shrink it by as much as 10%.
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Mar 8, 2012
How can I create a list (of my custom structure) to hold only unique items? This list should be created from another list.[code]...
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Jan 9, 2009
Trying to understand the best way to do this and I'm can't get it figured. Here's basically what I have:
Public Class CardParsingClass
Private iAcctIDStart as integer
Private iAcctIDLength as integer
[code]....
I've only included 2 of the class level fields here but there are actually 30, so that's why I was hoping to be able to send the name of the field to set and the value to set it at in the SetValue function. So in some other routine in the program I'd like to be able to issue the following call:
SetValue("iAcctIDStart", "3")
But then when I get into the SetValue routine, I'm not sure how to proceed. I thought about a case statement that would basically be this:
select Case strFieldToSet
case "iAcctIDStart"
iAcctIDStart = cint(strValue)
[code]....
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Jun 10, 2011
I'm using a Microsoft Word form template to create objects in a form programatically, so depending on the information read by the program from the template.
So, I've got some fields where I store formula data for the form, in which I specify that the value for that field is obtained by multiplying other fields in the template. So I store in the string something like this:
"Text1.Text * Text2.Text"
So I need to convert these string values into variable calls to actually operate these values.
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Dec 7, 2010
I'm looking to create multiple variables based on a counter object. For example if a counter object is 6 I want to create 6 instances of the variable mText
Something like:
Dim i as integer
Dim Count as integer = 6
[code].....
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Sep 30, 2010
Is there any way to access your variable names at runtime? Is there any kind of collection you can loop through?
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Apr 28, 2010
I want to combine multiple lists of items into a single list, retaining the overall order requirements. i.e.:
1: A C E
2: D E
3: B A D
result: B A C D E
above, starting with list 1, we have ACE, we then know that D must come before E, and from list 3, we know that B must come before A, and D must come after B and A.If there are conflicting orderings, the first ordering should be used. i.e.
1: A C E
2: B D E
3: F D B
result: A C F B D E 3 conflicts with 2 (B D vs D B), therefore requirements for 2 will be used.
If ordering requirements mean an item must come before or after another, it doesn't matter if it comes immediately before or after, or at the start or end of the list, as long as overall ordering is maintained.
This is being developed using VB.Net, so a LINQy solution (or any .Net solution) would be nice - otherwise pointers for an approach would be good.
Edit: Edited to make example 2 make sense (a last minute change had made it invalid)
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Feb 1, 2011
I am working on a project where my class has to execute VB code provided by the user, to make it simple I am trying to recreate my own eval function, I am using the following code I found on the web to do this task.
Imports Microsoft.VisualBasic
Imports System
Imports System.Text
Imports System.CodeDom.Compiler
Imports System.Reflection
[Code] .....
The problem with code is that it can't access any variables or there values, so I have decided to get the variable names, there values types and there types dynamically and recreate them in the class that is being created dynamically. Any way to get the variable names there types and values in the current class or method, so that I can recreate them, and execute the user passed code, the user knows what variables are in the current class or method and there datatypes but he don't know there values as they may have changed, so he can't initialize them. Is there a way to do this, this code will be called in an asp.net page on page_load event, the code passed by the user is stored in the variable vbCode that is passed as a parameter.
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Aug 13, 2009
I am upgrading a VB6 to VB.NET project using the upgrade wizard.I know this is going to give me a lot of grief, but I am trying to make the old application useable. I'd rewrite it if I had time but am currently finishing up a summer internship and would like to get something working.One thing the wizard is doing that I can find no justification for is renaming of random variables. [code] For the life of me I don't understand why this is changing left. It isn't a reserved name as far as I can tell, there is no other variable named left that I can find in scope, and renaming it does not create a compiler error. [code] It does this to seemingly random variables throughout my project. Anyone have ideas as to why it doesn't like some of my variable names?
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Aug 9, 2010
This is a quite strange problem. I have set a setting variable in Application settings with following data:
[Code]...
Yet when I reference it with this statement: MsgBox(My.MySettings.Default.county) It alerts 1. Despite being the first to be executed as soon as form loads.
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Apr 21, 2011
I'm going to describe what I'm trying to do and then what I'm doing in hopes of making this as clear as possible.I'm trying to create a way of having data avaialble to the application that could be changed in the future and not have to recompile the code.Normally I do this for my connection strings incase something changes, this way I can just change the file and I'm good.however in this case I'm trying to store a long string variable that contains something like(including all " in the string) "Dear " + emailRecp + vbCrLf + "Thank you for buying our product...."
Now when I do this as part of the code with something like strMessage = "Dear " + emailRecp + vbCrLf + "Thank you for buying our product...."when I look at the output from this it looks like (which is what I want):
Dear Mr Smith
Thank you for buying our product....
however when I do strMessage = My.Settings.purchaseMessage (even with .ToString()) the output looks like Dear " + emailRecp + vbCrLf "Thank you for buying our product....how to do this in another manner that won't affect performance.I have also tried to trim the " from the first and last char positions and no luck.
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May 3, 2012
I have a stored procedure (I cannot edit) that I am calling via linq.
The stored procedure returns values (more complex but important data below):
Customer Stock Item Date Price Priority Qty
--------------------------------------------------------
CUST1 TAP 01-04-2012 £30 30 1 - 30
CUST1 TAP 05-04-2012 £33 30 1 - 30
CUST1 TAP 01-04-2012 £29 20 31 - 99
CUST1 TAP 01-04-2012 £28 10 1 - 30
I am trying to limit this list to rows which have unique Dates and unique quantities in LINQ. I want to remove items with the HIGHER priority leaving rows with unique dates and qty's.
I have tried several group by's using Max and order by's but have not been able to get a result.
Is there any way to do this via linq?
EDIT:
Managed to convert brad-rem's answer into VB.net.
Syntax below if anyone needs it:
returnlist = (From p In returnlist
Order By p.Qty Ascending, p.Priority
Group By AllGrp = p.Date, p.Qty Into g = Group
Select g.First).ToList
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