VS 2008 Not Allow Duplicate ID In Db
Sep 21, 2010
i have this sql table
Table name: Project
Fields: PrjCode, PrjName
i want to save my Project codes and name to this table, but before i will save the data from my form i want to check if the user input (PrjCode) already exist in the database. and if the prjcode exist it should not allow to save the entry since it will duplicate. (NOTE: ProjctCode is not auto number. the user will input it)
base on this scenario have this code
If PrjCodeTextBox.Text = "" Or PrjNameTextBox.Text = "" Then
MessageBox.Show("Please Complete the information required!", "System Message", MessageBoxButtons.OK, MessageBoxIcon.Error)
[Code].....
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Mar 17, 2011
I have this data in txt file and the data keeps changing all the time.
[code]...
I would like to read all lines and compare, if the same name and same address is found, which is in the [......], then i need to count it and show the most frequent buyer!should i read it all and put in array, and compare and put the duplicate data and count into another array?
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Jun 11, 2010
I'm new to VB and as every beginner i've begun with a browser, i've added a combobox that records the current url of the website and adds it to a "history" combo box, the problem is that when i go on a site once, the site name shows up multiple times in the combobox. I was wondering if there is a code to only add a certain value only once,
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As Object, ByVal e As
System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
[code].....
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Feb 5, 2010
I am creating a program and calling it 'Dcrews Task Machine', And It's a Bot for some useful Info! I have googled this before searching and searched the forums!It's not a bad Bot in actual fact it is a good Bot and helpful/useful! It does tasks on your computer as you choose from a selected list or record as you wish to do! What I am trying to do here.. Wait! I should mention and include info of my Cursor so far..It is a form with a picturebox (Picture of Cursor myMake)The reason being as i want my own cursor as instead of the system cursor is it is my theme and i would like a nice cremy colored cursor to do the job/task!What I have already managed to do is make it move to places!What I wish to know is how do I make it click (I know how to make the system cursor click but not this) When it clicks i want it so it clicks from the themed app Cursor instead of the system cursor!
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Nov 8, 2011
In my winform, i m using a datagridview.. I m also allowing to enter data through it. User has to select a product and put in price for it. for products column i have used combo box and for rate column i have used text box.I want that once user has selected a product, he is not allowed to select the same product for other rows... I mean duplicate product selection not allowed... how do I prevent it..
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Apr 2, 2010
The code I have so far is:
--------------------------------------�
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]....
PS: The code I currently has only searches for "Hello" as an exact phrase whereas I need it to search for "Hello" and get the line containing "Hello" (Whether the word "Hello" is a the beginning middle or end of the line) and duplicate it.
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Sep 5, 2010
I have a text box where I only want to be able to enter each character once, so no AA or 99, only one of each character. This is so I can paste into the field, but where any duplicates would be eliminated. I've tried using this code, but am not sure where I go wrong.
[Code]...
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Jul 28, 2010
vb novice here.. im trying to create an application that uploads an excel file and then remove all of its duplicate rows. so far i dont know how to start the code that remove the duplicates.. so far this is what i have done with my removeduplicate function..
[Code]....
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May 26, 2008
I am looping through a file and I am populating a datagridview with values. I have this part done, and it works just fine. My problem comes in when I try to remove duplicate rows from the DataGridView. I would like the code to increment a cell if a duplicate row is found and then remove the duplicate cell. For instance if the program comes across 2 instances of "duplicated value" in the DateGridView, I would like the second instance to be removed and then a value of 1 added to the first instances row, 4th column. I understand most of it, but I just can't get the darn loop(s) working correctly. Iguess my theory is to compare the first row to the last row. if there is a duplicate, then remove the duplicate and add "1".Then I should move onto the next item from the top. This would loop until all items have been checked. I have been messing with this for a while now and I just keeps getting worse.
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim col, row, MaxCount, x, y As Integer
[code]....
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May 17, 2011
I have this code to delete the duplicates but i am stuck on how to firstly combine the subitems before deleting the duplicates.
vb.net
Dim DuplicatesList As New List(Of String)
For Each item As ListViewItem In Me.lstTakeoffList.Items
[code].....
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Jun 16, 2009
I want to know to how to delete duplicate items in menubar?
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Jan 16, 2011
Having problems with a datatable which consists of multiple datalogger information. Within the datetime field there are as the name suggests listed date and times entry i.e. 12/01/11 22:56:56 ect ect.
Problem is i am graphing this and when ms chart reads the duplicate entries as a series. It doesnt like it and comes up with a slightly odd interpretation. I need to get the duplicate entries out to establish a single time series.
I was proposing to clone the original datatable and run a loop to remove the duplicates. I have been trying to do this for days and have played with a whole load of examples, without success. Can anyone point me in the right direction on this.
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Aug 26, 2010
If I have an unbound DGV with hundreds or thousands of rows what is the easiest way to find any or all duplicate rows? ie. where the data in all the columns is the same in 2 or more rows.
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Jul 28, 2010
see this codes scrapes all href links and check if it contains "/file/" to save it but I get duplicate links saved so If i can change this code to work some how with Innertext("More") I will have no duplicatestried to configure it to work with innertext it just doesn't fit the way I think it should ;/and if anyone can add how can I remove duplicated urls on my txt file that would be really nice I might need it
Dim links As System.Windows.Forms.HtmlElementCollection
Dim b As String
links = WebBrowser1.Document.Links
[code]....
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Aug 7, 2011
I need to Replace two duplicate word into two different words.Like:
abc is a search engine and also abc a search engine.
to
google is a search engine and also yahoo a search engine.
I tried this.
Quote:
TextBox1.Text = Replace(TextBox1.Text, "abc", "google")
But it replaces all abc to google. But I need to change first abc to google and second abc to yahoo and so on.also tried this one
Quote:
Dim m14 As MatchCollection = Regex.Matches(TextBox1.Text, "abc", RegexOptions.Singleline + RegexOptions.IgnoreCase)
For Each n1 As Match In m14
Dim value As String = n1.Groups(0).Value
'MsgBox(value)
[code]....
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Nov 25, 2011
I am making a Bingo game. I have a button which keeps on calling numbers which are then added to a list box. How do i make it that the numbers called don't repeat (get displayed in the "number called" label). Is there a way to use items already added in the list box to eliminate duplicate numbers.
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Sep 24, 2009
For some reason my code is executing the INSERT query twice and putting duplicate records in my table. If I put a primary key on one of the fields I get a runtime error and it complains about the fact it can't add the record twice.
The part of the code that INSERTs is near the bottom, bolded and italicized. I put the entire IF statement of code incase my logic is wrong.
This is what's being executed when a user clicks a button
If listOfCompanies.Contains(cbx_Company.Text) Then
'If the list contains the company, UPDATE the record
If LaborChecked Then
[Code].....
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Aug 21, 2009
Basically what happens is each time it loops through it adds a number to the end of the string, and by the end I should end up with an array full of string in a format like "111 222 333 444 555 666" but I end up getting strings like this "111 111 222 222 333 333". The weird thing is, if I add a message box in every loop it works fine, but obviously I don't want a message box pooping up every time it loops through. What is causing this and how might I fix it
The code is:
For x As Integer = 0 To (NumCards.Value - 1)
NumRep = 0
[code].....
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Jul 29, 2009
Here is my
cn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=BHgardeners11.mdb;")
cn.Open()
Try
str = "UPDATE Products SET ProductCode = ?, ProductManufacturerCode = ?, ProductsTitle = ?,
[Code] .....
If there is only one item in the database, then this code works. If there is more than one record then the error is produced that it is trying to produce duplicate values. This is down to the Primary key in my database which is the only thing that cannot have duplicate values. However, when I remove the primary key it has the predictable problem that it goes crazy and does weird things.
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Jan 9, 2010
Visual Basic 2008 rookie question. I am getting the error message 'Error 1 The item "objDebugCIT163Lab1Cdrb.WeatherReport.resources" was specified more than once in the "Resources" parameter. Duplicate items are not supported by the "Resources" parameter.CIT163Lab1Cdrb'when I debug. I am familiar with Visual Studio 2008 having used it for my previous C# course. Zipped and attached the project below. I hadn't finished the coding, but this problem seems to be of a setup nature I should either resolve before I continue or start from scratch
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Sep 1, 2009
I was just wondering if someone could show a code sample that will remove any duplicate text from Textbox1.text (with multiplelines).
I need to remove the sentence "Send a private message to" and prevent it from entering Textbox1.text.
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Nov 25, 2009
When I isolate the following code to create a chart, the result is normal. But when I call it from a control, duplicate legend and Y-axis scales and labels appear.
I did a line-by-line comparison and detected no code differences.
1) What is the likely culprit?
2) Is there a cleaner way to activate a graph?
Private Sub Button15_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button15.Click
Dim frm As New WindowsApplication1.Form8()
[Code].....
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Mar 27, 2012
I have a List object and I want to remove the duplicated items but leaving at least one of the duplicated items in the list;I wrote something like this however I would optimize this code for better performance, is there something faster?
Const chars As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
Dim rnd As New Random()
Dim mylist As List(Of String) = Enumerable.Range(1, 100).Select(Function(i)
[code].....
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Jul 14, 2011
I have a VB.NET project in Visual Studio 2008 that I created a specialized addin for. The addin prompts the user to select a database table, takes a template form class's files, copies them to another directory within the project, and renames the form class within the copied files. It then opens the new form and adds controls to it based on the fields in the database table.
The copying of the template form causes the background compiler to give 'duplicate member' errors, such as "Private Sub InitializeComponents(...) has multiple definitions with identical signatures," even though I renamed the files of the new form and the class name within them. Sometimes these errors go away before the new form is opened, but when they stick around the new form doesn't open correctly, and it throws an error instead. I implemented some code to wait until there are zero errors in the error list before trying to open the new form. This has helped sometimes, but for some reason sometimes the errors don't go away at all until the addin is closed.
How to copy the template form and rename the copy without the background compiler ever noticing duplicate members. If that's not possible, then perhaps someone has an alternative?
Here is my code that copies and renames the template form:
Private Sub CreateDataForm(ByVal tableName As String, ByVal displayName As String) ', ByVal subDataForms As IList(Of Object))
Try
Dim dataFormClassName As String = "frm" & MakeValidName(displayName)
Dim dataFormFileName As String = dataFormClassName & cVBSuffix
[CODE].......................
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Sep 11, 2009
I'm doing a simple database thru VS2008 and Msaccess without using any builtin relationship between records, now i need to know how i can retrieve specific data from access using the oledbadapter or any, example seek if the value from the textbox1.text is already existing in msaccess table then msgbox "Record already exists.", note that the code is in keypress event of the textbox1.
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Nov 29, 2009
I have a program where you have three entries, CD name, artist, price and it goes into a listbox and .txt file when closing. I have to have a message box if you enter the same CD name. I have a code to open the .txt file and compare strings but I need to change it to compare only the CD name and not all three entries. Is there a way to do my string compare against my listbox without opening the .txt file?? The program loads the listbox from the .txt file when opening. Private Sub btnAdd_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAdd.Click' adds CD information to the list box
' declare variables
Dim strName As String
Dim strArtist As String
Dim strPrice As String
[code].....
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Jan 10, 2009
I'm using the datagridview. This is the sample data:
[Code]....
How do I parse through the grid to rename the duplicate values in a particular column (in this example it's the l_name field) into such a format?
[Code]....
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Apr 17, 2010
I am working on creating a program that records animal data (wombats) and stores it into a database, using vb.net. I am trying to add new records into a database but every time I click add, to execute that, there are duplicate records that gets added. How do i write the code so itonly adds it one time. I am using a data reader. Here is the
[Code]...
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Jun 21, 2010
I Use visual Basic 8.0 and Mysql 5.0 I have two exactly the same Tables:
Table1:
RecordID , Integer = primary key auto_increment NOT NULL
Articlenr , Integer
Articlename, Char(20)
[code]....
I want to add all the records from table1 to table2. I want to do this 10 times if I execute the following statement: INSERT into Table2 SELECT * FROM Table1 ; Everything works perfectly. The two records are added to table2 But if I execute the stament a second time get the following message: Duplicate entry '1' for key 1 I now i must do something with "duplicate key update" in the Insert statement.
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Feb 27, 2010
I use this code in which i want different value of i (no duplicate). . but this code return some duplicate value of [code]...
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