For example, when the codes are compiled, will VB.NET tend to be slower than C#? Or are there any major features in VB.NET / C# that we cannot find in the other language?
View 1 RepliesI have three Tables in the MS Access database as below:
Company_Data
Name|Age|Department|Salary
User_Data
[code].....
What I want is ListBox1 and ListBox2 above are not same Item
ListBox1.Items.Add("2")
ListBox1.Items.Add("4")
ListBox1.Items.Add("6")
ListBox1.Items.Add("8")
ListBox1.Items.Add("10")
[Code] .....
If not, maybe someone could write such an article and the view count would go through the roof?
View 1 RepliesI have a two different tables, Table 1 and table 2.
Table 1
-----------
Resource
Start Date
End date
[Code]....
Here I have to match the total hours of each table according to the resource,
then have to find the mismatched data and find difference with that values of mismatched data.
I've started using .Net's stack collection. The basic features I guess are the "pop" and "push", where you add or take off the top element of the stack (if you are referencing other elements in the stack then another collection type is probably better).[URL]..it appears that the Stack collection (like other collections) is basically an array with some window dressing (so you actually can see other elements). As far as I can tell, "popping" and "pushing" is changing the first element of the array. Shouldn't instead the final element be the "top" of the stack and be the one that is changed? Otherwise the program has to reindex all the other elements in the array every time a pop or push is made. This seems very inefficient. But this is what Microsoft's description appears to be saying what is happening.
View 10 RepliesSo i am working on a program that needs to run NSLookup for a Computer name specified by the user. Here is the code I have developed which works:[code]Now because of the dynamic domains that this will be on, it is difficult to nail down which character to start a read at to determine if the Computer name exists. For some reason the reader is not picking up the '***Non-existent' line that is reported from NSLookup. When i run the NSLookup it requires me to run the Function 2x before it displays a result in my lblresults. With that pre-knowledge,
1. How do i make the NSLookup Process more efficient?
2. Is there a better way to Parse the information to specificly pull the lines that have been reported back, specificly the '***Non-existent' line.
Tell me if this is efficient code. or if there would be a more efficient way of doing this:
CODE:
I'm wondering if error catching will take more. time than a few more lines of code to accomplish the same.
How would you go about reducing the code for this but still allowing it to work the way it is now
Dim updatelesson As String = cmbChange.SelectedIndex
Dim chosenlesson As String = cmbSession.SelectedIndex
Dim changed As String = lstNames.SelectedItem
[CODE]....
wondering about the relatively efficiency of declaring oop variables in the loops, emselves, or declaring them before first use. Here are some examples:Declare early:
Dim ix As Integer
Dim currentNode As System.Xml.XmlNode
For ix = 1 To 100
[code].....
I'm looking for advice/ideas in regards to ongoing file encryption.I have an event that fires frequently that contains small amounts of data passed through the eventargs.This data is then written out to disk (currently unencrypted).I need to encrypt this data (which, I can do).My attempt in the first five minutes was unencrypting the file, appending the data and reencrypting the file.This obviously works, but is pretty inefficient and not going to be my solution since the file could grow rather large and the resources to unecrypt/ encrypt grow larger as the file grows larger.My next thought was to encrypt each set of data as it's written out and have some kind of marker in the file to denote where to split so I could unencrypt each chunk to reproduce the original file.I'm leaning towards this approach now (though by encrypting small chunks of data multiple times, the file size will be considerably larger.As an example, if I encrypt each letter of the alphabet the file is approx 8 times larger than if I encrypted a string with all of the letters of the alphabet in this case each files decrypted content would be identitcal).
View 3 RepliesHow can I test my codes efficiency in vb.net?
View 1 Replieswhich is more efficient?(Assume case statements, etc., cannot be used.)
If a Then
If x Then
ax()
ElseIf y Then
[code]....
I have a function that I use to export the contents of anything that implements IDataReader into delimited string (that I can then write to disk or send to a response stream). It works, and it's quick for smaller recordsets but gets bogged down once the record counts get over a thousand (I have something that does the same thing only it writes to a new Excel spreadsheet and it runs in about 25% of the time). I understand that with record sets that are very large, this could cause a memory issue since I'm reading it into a string, but typically these won't be any larger than 100k (if written out to disk). My question is, here's my function, is there anything you can spot that I could do more efficiently (like, I suppose I could stream line by line to the response in asp.net, or line by line to the file on a console app, I haven't tried that).
[Code]...
I'm building SQL statements with a bunch of values from a dataset. Obviously that gives some really long names to put inline or even in parameter. addwithvalue code so beforehand I just declare a bunch of variables with really short names and assign them to the DS's exact fields like: [code] but this way I'm putting all the data in the dataset into memory twice by copying it into a new variable, right? So I was thinking, if it's just a string variable representing a field on the dataset, why not declare it by reference so the variable is basically a handy nickname pointing to that field in the dataset.Will it even work to have a string declared by reference and connected to one value inside of a dataset? And if so, will that stop duplicating everything in memory? I forgot how to declare a variable as a reference to another variable instead of the normal way in VB.
View 12 RepliesThis is more a conceptual question. Here is my current predicament; I am writing a vb.net WPF application and using the MVVM pattern (love it! maintainability is just amazingly awesome). Currently all the code is written by hand and there is no use of NHibernate or Entity Framework as the backend is an access database (due to policy I cannot use NH and EF doesn't support JET Databases, we may switch to MSSQL at some point but that may be a while from now).[code]...
View 1 RepliesI have an application that queries DHCP and pulls scope/subnet information. There are roughly 8k scopes on our network to query so reporting this data takes a little bit of time. I currently have this running on it's own thread and reporting to a progress bar so the applications doesn't seem inactive.
The DHCP api functions can report a total, a max read and a resume argument. This means that I can, in theory start 4 threads and have each thread read through 2k subnets, so it will only take 1/4 of the time to read all this data. Would I need to create four separate background worker handlers, do_works, runworkcomplete, report progress etc.?
I have two textbox in my application.
Textbox1.Text="19-Jan-2010"
Textbox2.Text="Jan 2010"
May I know how can I compare that Textbox1 and Textbox2 text is within same month and same year?
Just wondering if i might hit a snag in my program. Ive got 10+ users using the same files, via a Oledb to put info into an excel spreadsheet. If 2 or more people save there file at the same time will the program go into read only on one person. Normally one 3 will use the file at one time. I know Sql itself would be better to use. best way i can describe it, normally using excel if you manage to open the same file twice one opens as normal but the other opens as a Read only file, will the same thing happen if im using Oledb connections?
View 2 Repliesthey need to make some compare version between host version and client version.. and each 1 version different will download the file to the client..[URL]..with both example, how can i make a program in VB.NET just like i said just now?
View 15 Repliesi need to make sure a labels.text and a labels2.name are equal. figured it was straight forward i renamed the label the same name as the label im comparing it too but it comes up false.
View 1 RepliesI'm sure this is straightforward but I cannot find the correct string to get a google result. In VB.NET what is the difference between = (equals sign) and := (colon followed by equals sign)?
View 3 Repliescan anyone tell me book for VB.net for beginner and complee package of books important for VB. as i don't know anything abt VB.
what is difference between VB.net and asp.net and c#??
Possible Duplicate: What are the most important functional differences between C# and VB.NET? What are the basic difference between c# and VB.net?
View 3 Repliesknow the difference between C#.Net and VB.Net. I use C#.Net for my projects, but when ever I met with some other programmers they often called VB.Net more powerful and easy, than C#.Net. I always asked them "Why it is more powerful then C#, since it uses the same framework?" but still I didn't get any answers.
View 3 Replieswhat exactly distinguishes a COM component from a DLL? Isn't a COM component just a library of functions that can be called from another application? Why is using a COM component so much more complicated than just registering it like one would do with a DLL?
View 4 RepliesI'm looking for an explanation of the difference between
Dim sw1 = New StringWriter()
Dim sw2 As New StringWriter()
Both seem to instantiate new string writer instances that I can use.
I was under the assumption that VB's For Each loop was the same as a For Next loop. But when i try running the following code I do not get the expected result.
[Code]...
I have this code, first I thougt it should be the same but i cant acces the info in the same way .. why is this???
Dim tp(,) As Integer = {{1, 3, 5, 9, 7}, {34, 3, 4, 5, 6}}
Dim tpo(1)() As Integer
tpo(0) = New Integer() {1, 3, 5, 9, 7}
[code].....
The first one I use only one for each and the other one I use two .. why is this different? are noy they 2 dimensional arrays ???
What is the difference between VB and VB.NET?
explanation with examples preferred