I have a program connecting with a database.. so when add record in it, i want to validate for the duplication of ID in database..
here's my code for add button:
Private Sub cmdAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdAdd.Click
dSet.Tables(0).PrimaryKey = New DataColumn() {dSet.Tables(0).Columns("WatchID")} 'The table primary key is the WatchId
I have a windows form that takes username and password. It validates it with the database I have created that contains the correct usernames and passwords. So I have implemented a code to verify whether the details entered are proper..[code]
I've gone through various thread, posts, classes and walkthroughs on sites but seem to be coming up short either in my understanding or what is/should be going on.I have a very simple data entry tabcontrol (think like microsoft excel but textboxes, labels and the odd combobox rather than a grid). When I click one tab it creates a new tab and names it according the sequence (no problems so far). Here is the crotch kicker (for me at least). I need the first tabpage layout on all additional tabpage so that data can be entered in each separately and stored with constant "processing" (adding and subtracting ).What would be the best approach to doing such a tabpage duplication?
Currently a User control library inheriting from tabpage seems like a good idea but with the 40 or so controls on it is this actually going to function like the first tabpage (as in the one i have now not the one I'd have if i used the user control instead).Do I take the raft of code the designer creates automatically for the tabpage and its controls and simply add them to the click event? Would this create duplication problems with name or would it be ok as they would be tabpage1.lblName and tabpage2.lblName?
i developed a project using VB.Net 2005 and sql server 2005 standard edition at back end. now its complete and have to deliver to company now. but i am afraid that the company may reproduce a new copy of this software from the original and may sell to any other company or in open market. I want to implement some mechanism on my project for its security, which enables it to not to work on other computers or some similar type security.
I have this code and it is not working correctly. Note: The code must check the if the data is valid every time the user enters a new datai have 2 columns in my table
Code: Private Sub Table_CellValidated(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.CellValidatedEventArgs) Handles Table.CellValidated
I'm writing a program on CD Collection. My problem is write a code that prevents a user to enter a CD collection name that is already stored in the filename.txt.
The rest of my program is okay, but the only problem is something do with btnAdd control.
Here's my whole program:
Option Explicit On Option Strict On Option Infer Off
I am working on an application, where I have already normalized the databases. Now I am creating an application in asp.net with vb.net as my code behind fine. These random numbers would be stored in the Id column. So, no way there would be repeating the keys. But my application could generate the key, which would probably get repeated. How would I check the database for, so that random numbers wont get repeated? is there any function? Could you give me the code for the same.
I've got this problem. I have no clue how to prevent a duplicate from being entered in a combo box in VB2008. The information that is to be compared to is in a text file. What I have now works, but I have left out the prevent duplicate part.
i want to prevent user from adding same data on my database... (using access as database)
let say i have 5 fields on my database... ID, Name, address, contact, email... binded to textboxes... idTextbox, nameTextbox, addressTextbox, contactTextbox, emailTextbox.
if the user add a data.... and clicks the save button (saveButton) a messagebox will show a message saying that the data he/she entered already exist..
the messagebox will only show if the user entered a data with the same Name.
I am new to Visual studio 2008 using the express version. I wish to generate up to 10 000 random numbers without duplicates. Any appropriate container to store and print these numbers.
This is a simplified version of a class that I have in my project. Since the Bonus is figured the exact same way in each function I want to remove the obvious code duplication that appears here and make the three different functions into one. However I am not sure how to provide the argument that this new function would require.
For instance I am currently just passing the argument like this from code
but I am not sure of the correct syntax or whether I am on the right track at all.
Public Class TestClass Public Shared Function StoreBonus(ByVal bonus As BonusTrackerBO.StoreBonus) As Double
[Code]....
Edit: It may not make a difference but I should have made clear that there are other factors in the equation (I was just trying to keep it simple). So is the answer the same when there are other callbacks to the bonus like bonus.MaximumAmount, bonus.MinimumAmount? There are 5 callbacks to the bonus object and the amounts are different depending on whether it is a Store, District or Company asking.
Am developing a resume data retrieving software where data is stored in one parent table and 4 child tables as such:
Resume_table ----> Parent table holds ----> Res_ID, Emp_ID, Lang_ID, Task_ID & some other static data
Employee_Table--->which is referenced directly to Resume_Table.Emp_ID similarly ol other 3 tables are referenced to the main parent table Storing and retrieving data is all working fine as long as I am retrieving 1 record for each child tables But some times there might be couple of languages and only single records for other child tables.In dat case as the four child tables are ol in separate subreports whch are called onto the main report whch prints as cv gives redundancy in data i.e by giving duplication of ol records twice which were single records during entry, which i think follows the language table if it consist of 2 records.am using a join query to call these records onto crystal report...
I'm trying to create a 'lottery machine', I've included the code i've been using below. I've got 7text boxes, ad numbers are between 1-49. I need to stop the duplication and to sort them in ascending order (1-49), i've tired a bubble sort but that hasn't worked, and a 'if, while' process, but i think it might be wrong! I know its a little pushy but i could do with this being sorted before 3pm friday 29 january 2009! I would be so greatful if anyone can even point me in the right direction as i am new to visual basic.
pixie_208
My code:
Public Class Form1 'version 27/01/2009 Dim Timer2Count As Integer
i developed a project using VB.Net 2005 and sql server 2005 standard edition at back end. now its complete and have to deliver to company now. but i am afraid that the company may reproduce a new copy of this software from the original and may sell to any other company or in open market. I want to implement some mechanism on my project for its security, which enables it to not to work on other computers or some similar type security.
Reading through "The Pragmatic Programmer", I've come across the DRY (Don't Repeat Yourself) and Orthagonal (keep code modular) principles.I have a suite of modules, some of which have common procedures. Because each module is a separate project in Visual Studio, up until now I have simply copied code from one project to another when 1 module (project) needs to do the same function as another module (project). This is when functionality overlaps, not when 2 modules (projects) do everything the same.
I always suspected this was bad practice (and have seen the fruits of my suspicions when the subs get out of sync), and the book confirmed me in this belief. So, what I want to do is make a central code repository for the 4 or 5 common subs, but I don't know how to do it.Should I make a .dll file for each sub I want to use in multiple places? If so, how do I do that? Is there another way to do what I want to do?
1. I have a subroutine that takes a filepath (and if disconnected also a SqlConnection) and loads the referenced file into a database as a BLOB.
2. I have 3 separate projects in 1 VS solution that all run basically the same version of this code.
3. I want all 3 to run EXACTLY the same code.
4. I want 1 version of this code so that any changes made don't need to be made in 3 places.
5. I have a few other instances like this for other subroutines.
i'm working on a voting system but im having problems in adding records... i have two a primary key, the idnumber and the address. the address is where I base if that certain address already voted. but the problem is everytime i try to add a record with the same address (ex. Block 1 lot 4), the data is duplicated which is not output i want. the program should detect that there is already an existing address.
If strCustomerOrder = "A1#" Then decSubtotal = ANTACID_ONE mintQuantity += 1 ShoppingCartForm.lstShoppingCart.Items.Add(("A1" & vbTab & vbTab & "Alka-Seltzer Antacid" _ [Code] ..... I want my listbox to not display duplicate items. I just want it to update the quantity(Qty).
Ok, so I have created an Access database, and everything is working fine (much to my amazement) except for one thing. I want the database "update" button to validate the input before applying it to the dataset, and if there is an error (empty field) I want it to pop a message and highlight the text box in question where the error occured (there are 7 textboxes).
How precisely do I go about doing that?
CODE:
This is what I have so far for the update button. I attempted the "textbox1.isnullorempty"
I've small project to do and now I'm stuck in middle. The program is to read the sequential text file and load it into a array/array of structure.The data information is like this (sample):
ID | Name | Type 1 | Cat | Animal 2 | Dog | Animal
[code]....
This is Just as sample data, my original data is more than this.I've open the DATA.txt file using FileStreamReader:
Dim FileStreamReader As StreamReader = New StreamREader(DATA.txt)
Read all the elements in the list and pass through ReadArrayString.Split the string using:
Where index 0 is the ID, index 1 is the name, and index 2 is the Type Then I load the types in the dropdown combobox menu from the array with out duplication. Like this:
If TypeComboBox.FindString(ReadArrayString(2)) < 0 Then TypeComboBox.Items.Add(ReadArrayString(2)) End If
Now When you click TypeComboBox it will show drop down menu with following list only.
Animal Bird Fish
After this, when Animal type is selected/clicked from combobox dropdown menu then it should only add the Id and Name of Animal type in the ListBox.Pseudocode may looks like this:
If Animal is selected/clicked from TypeComboBox then Add Cat into listbox Add Dog into listbox
[code]....
I've only figure out load items from only one column/array into combobox with out duplication.But can't figure out to compare the value of one column/array with another column/array and load it into listbox. I don't want to hardcode or write matching value inside the code. What I want is use the Array.
I'd like to write a license management based on a wcf services.
How can I ensure that the (end)-user/"hacker" can not replace our license management services with a corrupt server?
Our license server is hosted on our server in the internet. When the server send corrupt data to the client the complete license management concept is destroyed.
Viewmodel dienstViewModel contains a AdresViewModel Public Class AdresViewModel <Required(ErrorMessage:="Gelieve een straatnaam op te geven")> <DisplayName("Straat:")>