I have a database (using Sqlite) that has ID has a primary key with autoinc, that loads the values into a listbox control. If I loop through the database normally, adding the values of the database into my listbox, I can't get the ID by using SelectedIndex because the Index will not always be the same as the ID, and the ID will not always be the Index. :( This makes it painful when I want to query to delete the row, based on SelectedIndex.
I want to delete the row by ID, but I have no way of getting that ID with the loop I use Is there some hidden field type attribute I can use?
I am using VB .Net to access the eBay API and store all completed orders in a database. This database is then fed into a proprietary shipping system, which can not handle an order number larger than 20 characters. eBay returns an order number like so 230407279314-680141236013 which is too long. The order number is always 12 numbers a hyphen and 12 more numbers. What I need to do, is turn this (the result can be alpha numerical) into a shorter, unique order key to store in my database alongside the true orderId (so that this can be referenced by the shipping software instead of the actual order number). The reason for the 20 character limit is the barcode algorithm used. Is there any way to achieve this in VB .Net 2010? This number can be anything unique, so long as it does not exist already (even a good uniqueid function would work, but I would have to query the database to make sure it isn't taken)
How generate the unique no. 1,2,3 and so on .... on button click of each new user ..
the code mentioned below is a readwrite coding in vb.net ...
but the problem is it generate the same id for different users on button click event... but i want the no. of times button clicked the new ids will be generated
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click Dim FILE_NAME As String = Server.MapPath("counts.vbi")
Unique constraint - these columns currently doesn't have unique values..?? I have created Unique Constraint with 3 columns. My code works perfectly but once - two users @ same time entered same data and somehow it saved in DB; after that incident. This UniqueConstraint gives me error - These columns currently doesn't have unique values. How can I check if user enters this kind of entry or how can I restrict the Entry?
Sub emailConfirm() Dim email As String = txtMail.Text Dim name As String = txtPrenom.Text + txtNom.Text[code]....
note:I want to send Link contains a unique identifier and verify the unique identifier in the login.aspx.I don't know when to do this...I found nothing interesting on the net ...
Makes the following statement about the code below:
**"The computer evaluates the loop condition in the Do...Loop statment to determine whether the loop instructions should be processed. In this case, the inputsales <> String.Empty condition compares the contenst of the input sales variable to the String.Empty value. As you know the String.Empty value represents a zero length, or empty, string if the inputsales variable is empty, the loop condition evaluates to True and the computer process the loop instructions. *If on the other hand the inputsales variable is not empty, the loop condition evaluates to false and the computer skips over the loop instructions.
Based on the code I think it is the opposite: ...that while the inputsales value is not empty it should evaluate to true and process the loop and if it is empty it should evaluate to false and skip the loop?
I am constructing a program, i am new to Visual Basic, but i have past programming experience. I was wondering if anyone knew how to form a loop that could...lets say calculate the answer when two numbers are added together,and it would repeat this thousands of times, etc. And if there is a way, would it be possible to calculate the time taken to complete this loop.
I have written a function that gets the alexa ranking of a given url, now this function works perfectly but I want to loop through a ListView of urls and grab the alexa rank of each item (url) with my function.The code works great if I put a MessageBox in the loop to test that the function is returning a value but when I remove the MessageBox the loop does not work.I need it to loop through adding each result without a MessageBox stop in each loop.
vb For Each Item In ListView1.Items Dim result As Integer result = GetAlexaRank(Item.Text)
So I made a simple patform game where the player has to jump quickly while the platforms move to the bottom of the screen, as to not touch the bottom of the screen. But, I need to know how to create a loop to loop the locations of the platform. This means that after twenty or so platforms, the same platforms come up again, so that the player will have an "endless" game. I've declared all the platform's locations relative to the location of the first repeating platform:
how unique is this ? will i ever get duplicates ? and will it ever change ?... i want some way of relating my software to the customer .... is there a system GUID?
Function GetCPUID() As String Dim sReturn As String = "" Try
I'm making a sign in/out program using mysql and visual basic and need a little help I have two tables event_in and event_out and under each table I have event_id, which automatically generates a number(starting from 1) for each row. I was wondering if it's possible to generate the numbers based on the users. So let's say User A comes and signin, 1 is generated into the event_id. Then User B comes and signs in. I want 1 generated for him too...so all User A's event_id will be 1,2,3... and each user's event_id for both the in and out table will also be the same.
With this I will be able to subtract each user's timestamp in event_out from that of event_in to get how long they were in. I believe that if I don't generate the numbers separately for each user, then let's say User A signs in (1 is generated for event_id in the event_in table) but does not sign out yet and then User B comes and signs in (he get 2 for the in) but then he signs out before User A does and he gets 1 for the out and user A gets 2 for the out. So now user and with my current query I will not be able to calculate the timestamp.
i would like to get the unique catlogs, so from this list i want to extract only 7190, 7192, and 7193. i have a script that puts it into a dropdownlist by using:
DropDownList1.DataSource = dv DropDownList1.DataBind()
I want to generate a unique ID in VB.NET that starts with ASXXXXX where XXXX represents a number. The number has to start in an orderly fashion. This ID will then be stored in a SQL Server express table.
I'm a non developer user of VB. I'm using a simple form to input data to a database. have some text boxes bound to data and use a Binding navigator. I want to be able to handle or catch the error when a non unique ID is added. I have tried to include an error handler in several places but the exception is generated anyway. For example I select to add a new record the change the id to a duplicate value and navigate to the previous record and get the error. I want to check or validate the value before it generates the error to avoid the program crashing if someone includes a duplicate id.
Is GUID really unique? I have a webservice that the client application connects to, which generates a GUID. I know GUID are generated using the mac adress of the NIC. Is the NIC in the webservice server used or the client NIC?
Primary key must be unique....while inserting data into the database,i need to check whether the data already exist in the primary key column or not.......If not then only data will be inserted in the database else a msgbox will be displayed and data will not get inserted in the database....
I code on the side for a little extra cash. Up to now it has always been one off conversion programs. The problem is that I am being asked to generate a report program and there is a dealer acting as the go-between for the end user. I want to maintain control of this program. I don't want this dealer to be able to distribute it to all his customers (or worse sell it), but have no idea of the best way to do it. Since I do this on the side, I obviously cannot afford to purchase a third party utility.When I try to search, all I get are links to people asking what to do when an installation fails. Can anyone point me to a tutorial or article on how to do this without resorting to buying a utility?
regarding a UNIQUE value that needs to change.Within my XML for each record i need a Unique Value to be entered. What i have so far is to use the Date and time to give me a unique value when i click my button. But because i click the button once, all records in the XML have the sme value entered. I need to be able to Add 1 to the Unique value each time to make them different? E.g I click the button now and the unique value is "CDS61510" then for each Unique value after i want to add 1 to it, "CDS61511", "CDS61512" etc
All my users can click on an image button accept one.When she hovers over the imagee it does not provide info on the status bar as if it doesn't even recognize there is a image button there.ALL the other users roll over it and the info comes up on the status bar and they can click the button and it works.What should I be looking for that one user can not access this button.There is not code specific that locks her out and the ahref links on her page work but not the image button.
I want to add only unique items into the list box.I am using lstListBox.FindStringExact(strKey) it works perfectly. But I have large number of strings and it is taking too much time. It also make the CPU uses 100%.
Question: When you have a .NET GUID for inserting in a database, it's structure is like this:
60 bits of timestamp, 48 bits of computer identifier, 14 bits of uniquifier, and 6 bits are fixed,
128 bits total Now I have problem with a GUID, because it's a 128 bit number, and some of the DBs I'm using only support 64 bit numbers. Now I don't want to solve the dilemma by using an autoincrement bigint value, since I want to be able to do offline replication.
i've researched and written a generic class (all my objects are the same structure) and i'm was just working on the collection using a hash table but i've just read a comment within (url...) in this forum...that we shouldn't use hashtables at all with vs2008.i actually need and object collection that contains other object collections within them.the application i'm trying to write is relatively simple (but i'm new to vb.net)it keeps track of the time for weight lifting training/workouts.a workout consists of 'say' a bench press, military press, curls, dead lift, etc within the "bench" you have 1,2, or 3 sets (how many times you do "the bench", within a set you have 1,2,3 or 4 lifters, each lifter does reps.then it starts over with military press..i guess i could base it on a treeview type structure (with parent child type relationships) but i usually think in terms of collections it appears that a collectionbase has no key and i'd have to keep track of them on my own...
