Check A Unique Value Before To Do SqlDS.insert()?
Jun 11, 2012
I have a table with one column auto number key ID. I have an index on another column as unique value. Every time that I try to add a new value into the ddbb that already exist on the index column, I got an alert using on error procedure. This is fine, but since the error is got when the insert command is execute a new ID is created and next time a correct value is added, it means, not duplicated, the ID number jumps. For example.
auto ID=1 new record (OK) unique value
auto ID=2 new record (OK) unique value
auto ID=3 new record (got error) not unique value, no new record added
[Cdoe].....
The question is, there is anyway to check if the value exist before to do the insert() command? or anyway to avoid ID number lost.
The ddbb is open using gridview with sqldatasource.
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Sep 17, 2009
I am using vb.net code and sql server 2005. I have textbox in my application which is linked to a sql column. Now I want to check that it should not insert any duplicate record in table. I mean everytime it insert in table the value should be unique. data is inserted in table on button click.
I am using objectdatasource for sql connectivity and FormView for dataentry.
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Jul 8, 2009
For my database I need to create unique numbers and insert them in the column "ID". Can I add them via a SQL query? The numbers would simply be 0001 to whatever.I'm using the "Show Table Data" gui.
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Feb 3, 2010
I am using SQLite and what I am doing is passing a simple SQL statement to the database, however I want to also return the Unique ID that the insert statement has been entered to, however I am not sure how to do this within a single SQL statement.
My code is below:
Dim mySQL As String = "INSERT INTO DisplaySetFolderTbl (parentID, folderName) VALUES ('" & selNode.Tag & "','" & Trim(Me.txtName.Text) & "')"
Dim cmd As New SQLiteCommand(mySQL, MISData.Instance.dbDRV)
Try
cmd.ExecuteNonQuery()
Catch
Exit Sub
End Try
MISData.Instance.dbDRV is the connection string
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Sep 1, 2010
I have a sorted array of files saved in the following format of filenames:
XXX
XXX_XX
XXX_XX_XX
I want to insert a new file (with a unique filename) between two given filenames (which could be in any of the 3 formats above).
For eg., a new file between 401 and 403 could be inserted with name 402 and a new file between 401_01 and 401_02 could be inserted with name 401_01_01. etc
The idea is to conform to the sorted list. Is there a way I could generate filenames for the files to be inserted, given the two filenames between which it needs to be inserted?
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Mar 11, 2010
I have an add/edit program I've written and I'm trying to find an example of how to test/check an Account Number that a person enters in a textbox to the database(SQL) to make sure it is unique.
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Feb 13, 2012
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)
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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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Mar 21, 2011
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")
[Code].....
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May 8, 2011
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?
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Jan 13, 2009
In the below code I want to also check before inserting if that record exists or
Dim conn As New SqlConnection("xxxxx")
Try
conn.Open()
[code].....
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Jan 13, 2012
I have this code that it's suppose to check if the username exists and if it is doesn't insert but it does:
Imports MySql.Data.MySqlClient
Public Class Admin_Reg
Dim server As String = "Server=localhost;Database=escola_musica;Uid=root;Pwd=;"
Dim con As New MySqlConnection
Private Sub Admin_Reg_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code] .....
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Dec 26, 2011
I have an interesting problem. I need to write a program that checks to see if data has been inserted or updated into a Microsoft access database . The program needs to be compatible with both types of access database, so using triggers is not possible as it wont work in access etc
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Aug 5, 2010
How do I check the status of the Insert button, ie is it set to INSERT or OVERWRITE.
As there is no object member in my.computer.keyboard, I cannot find a solution.
I also what the cursor to behave according to the status of the INSERT button.
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Jan 6, 2012
This my working method to send a email
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 ...
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Dec 7, 2011
I have looked through the entire internet (well that's what it feels like) to find this out.Tables - Authors and Titles add new title must be linked to an author, so I need to check that the author exists, if so, update the titles table with the user data from the textboxes. If the author does not exist, I need to insert the author first & last name into the author table, then the title info into the title table.this is in VB, using ASP.NET, and my database is a file, I'm not using SQL server, just Visual Studio 2008.
Dim insertParameters As New ListDictionary()
insertParameters.Add("ISBN", ISBNTextBox.Text)
insertParameters.Add("Title", titleTextBox.Text)
[code].....
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Mar 5, 2010
my program is "live" and my customer has troubles because it doesn't functioning as well as it should.I don't know what happen, did I changed something or not but suddenly data won't save to database from newly created forms. Beside this form I have additional 20 forms and everything is working like a charm and I use same code logic to save data to database. I tried to find myself what could be the reason, check by entering data directly to database table (works fine), check insert statement of dataset table (seems fine, too) and everything I could imagine. But now I ran out of ideas and I had to ask here.
Also, I added 3 fields to database table (nvarchar, int and decimal). All 3 of them allow nulls. I changed dataset and data entry form and now data won't insert if I dont enter values to int and decimal fields. Also, this decimal field doesn't accept 0 value if enter but if I assign value 0 from the code than it is ok. I'm not sure if I somehow changed concurrency and somewhere. I tried to find where I can change it but I couldn't find it. I use Visual Studio 2008 and Sql Server 2005 Express. Language vb.net.
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Mar 1, 2010
Using SQL Server 2005, vb.net
Table1
Name FromDate ToDate
Raja 12/02/2010 14/02/2010
Ravi 14/02/2010 15/02/2010
Ramu 18/02/2010 21/02/2010
...,
Insert into Table1 values('" & textbox1.text & "', '" & textbox2.text & "'. '" & textbox3.text & "'", con)
When I try to insert a value into table1 it will compare the table values if it is same, It Should throw a error msg "Name and Date Already Exist" otherwise Insert a value. Before Inserting i want to check a textbox value with table value.
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Apr 6, 2011
How do i check if the command insert new data in my ms access database this is my code so far.[code]...
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Jan 9, 2012
I am trying to insert spaces between Images and check boxes on a treeview node, in a windows form app i.e. checkbox (spaces) image (spaces) node text rather than default format checkbox Image node text
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Jan 22, 2010
I am practicing abit with For Loops. My code works fine which i am very happy about. I have now moved on to inserting an IF statement. I want the IF statement to check if my textbox1 and textbox2 are blank and if they are to notify the user that they must insert a value. I thought this would be quite easy to do however i think i was again ignorant to the coding! See below.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim answer As Integer
[CODE]...
I want to concentrate on the IF statement only as the For loop is working just as it should. When i run the program and leave both textboxes blank and hit the button i receive an error saying 'Conversion from string "" to type 'Integer' is not valid.'
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Aug 20, 2009
im trying to write to an sql database. im inserting an image, as well as some other information. I am using the following code which works fine, as long as i do not add an extra column/variable "LOCATION" in to the mix and leave "
'Cmd.Parameters.Add("@LOCATION", OleDb.OleDbType., 3).Value = "testing"
commented out. *this is undesireable as im trying to add extra criteria to be saved like LOCATION.
Try
Dim st As New FileStream("\serverfolder1storage" & "pdftemplate.jpg", FileMode.Open, FileAccess.Read)
Dim mbr As BinaryReader = New BinaryReader(st)
Dim buffer(st.Length) As Byte
[code]....
i am trying to store the location e.g "c:file1.jpg" in the sql db. Can anyone reccomend a solution to this using OLEDB? ideally i need to add approx 4 more variables. e,g
firstname
surname
dob
location
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Mar 30, 2009
Im getting an error with my insert statment "Syntax Error in INSERT INTO statement". I do not understand why. Im using global variables from form 1 and using them in form2 and trying to insert them from form2 into the database.
[Code]...
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Mar 2, 2010
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
[code]....
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Nov 11, 2011
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.
[Code]...
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Jun 8, 2010
I was wondering if there would be anything else I could use in my Hardware ID protection that would make it much more unique.
I am currently using Processor ID Volume ID MAC Address Graphics Card Name
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Jun 12, 2009
<data>
<food>
<id>1</id>
<name>asparagus</name>
[Code]....
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()
but i need it to get only the unique values.
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May 12, 2006
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.
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Jun 21, 2009
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.
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Nov 26, 2009
Is there any way to get a system specific ID in vb.net?
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