Sql - Unable To INSERT Even If The Record Still Does Not Exist In The Database
Jan 11, 2012
I want to insert records in the database but before it inserts, it must first check the database whether the value being inserted already exists. Now my problem is that I am unable to insert into the database even though the value still does not exist.
Here's my code:
Dim check As New SqlCommand
Dim sqlcheck As String = "SELECT SerialNumber FROM EquipmentDetail WHERE SerialNumber = '" & TextBox1.Text & "'"
connection.Open()
[code]....
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Nov 24, 2011
I need to check if a record exist in my sql server [code]...
I need to check if in "Br" exist a record for example "123098"
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Feb 18, 2011
I am a beginer with VB.net and I am trying to figure out what I am doing wrong.
[code]...
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Feb 21, 2010
While I've previously many years of relational databases and procedural languages, I'm stumbling with Visual Basic. In this problem, the simple situation is that I have two files, parent and child. The primary key of the parent file (Area file) is linked by a relation to one of the two fields that makes up the primary key in the child file (Project file) (unique key is formed from 'area' and 'project'). I have the default table adapters created on both files. I have created two maintenance forms showing one each of the two files in datagrid view format.I can create some records in the Parent (Area) file, but when I try to create a record in the child (Project) file, using one of the valid key values from the Area file, I get the 'ForeignKeyConstraint [relation name] requires the child key values [actual value] to exist in the parent table' which I'm absolutely definitely sure it does.
I haven't done any actual coding for those two maintenance forms, just dragged-and-dropped the files from the data sources screen onto separate forms so it creates the controls itself. But I can't work out, if it already knows the data does exist because I can load it back in to the Area maintence form, why it can't check itself to find out the record does exist. Why does it think the record from the parent record doesn't exist? It does exactly the same thing, whether or not the database is in access or SQL Server Express. I have all the latest updates.
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Apr 23, 2012
I want a Code to check Database exist in SQL and Message Box Show Database Exist Yes/NO?
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Jun 2, 2009
I developing a VB.net application and I'm unable to delete the record from. But my code only deletes the record from the datagridview and it is not being deleted in the database.
I'm using SQL Server Express 2008 and the table name is Admin_Table. The fields are :
Field Name Data Type
-------------- --------------
admin_ID int
admin_Name varchar
[Code]...
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Mar 5, 2009
I am connected to a mdb using OleDb. The Connection code is :
' GET CONNECTED TO DB
Try' Open a connection to the database.cn = New OleDb.OleDbConnection(strConnection)cn.Open()
' Load Data Adapteradapter = New OleDb.OleDbDataAdapter(strSelect, strConnection)
' Create Auto generated Insert, Update, Delete cmds for Tableautogen = New OleDb.OleDbCommandBuilder(adapter)
[Code] .....
Add & Update are working perfectly, but delete doesn't update in the db. While application is running it shows that data is deleted, but when I run again, I see the same data, so its not physically deleting from the db. Add & Update both are working perfectly even after re-running.Can anyone tell me where am I going wrong in delete part. The row is also proeprly selected. No exceptions, yet why not deleting physically.
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Feb 24, 2011
I am using SQLite.When I try to insert data into the tables I get the following:Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.I am using ADO.NET 2.0 Provider for SQLite?
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May 13, 2011
I'm sure that I'm missing something really basic here, but I'm just not seeing it. I have the following
Public Sub InsertRow()
Dim employeenumber As String = employeeListBox.SelectedValue
Dim headsetnumber As String = headsetnumberText.Text
[code]....
and when I put a break point on the command.ExecuteNonQuery line, and then step through that, I'm never displayed the thankyouLabel.Text nor is my data being inserted into the database.
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Sep 14, 2010
I am using VB.Net in Visual Studio 2008 with a connected SQL Server Compact Database but for some reason I can not get a record to insert into my Database from my Windows Form.I have used the data connection on the form already to populate a couple of combo boxes but when it comes to commiting the data the sub runs through but there is no additional data in my database.my code is as follows
Private Sub cmdAddQuote_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdAddQuote.Click
Dim cnData As New SqlCeConnection
Dim cdData As SqlCeCommand[code]......
Teh table only contains these 4 fields and another field which is an automatically generated number called nbrQuoteID .All of the fields are number fields but I have tried sending them as text to see if it made a difference (Threw up an error) but it didn't.
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Feb 16, 2011
im using vb.net 2005 express to connect to Ms Access 2010, im trying to insert information from textboxes located in a vb form to a table in Access how ever its not working here is the code ive tried :
Public Class Form2
Dim cn As OleDb.OleDbConnection
Dim cmd As OleDb.OleDbCommand
[Code].....
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Jan 11, 2011
Am trying to connect and insert a record into my database using vb.net this is my code:
cs = New SqlConnection("Data Source=AYACHMOHAMED;Initial Catalog=Employe;Integrated Security=True")
cs.Open()
sqlcom = New SqlCommand("INSERT INTO EMPLOYE VALUES 3, 'AYACH', 'PDG'", cs)
Try
[code]....
the problem is ra = 0 mean no insertion made I can't figure it out!
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Mar 15, 2010
How to insert a new record in Access database using VB.NET ?
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Feb 16, 2011
I ve created a form in vb 2005 express and im trying to connect it to Microsoft access 2007 all i want to do is insert a new record, ive been trying for a few days now with no luck hers my code I dont even get an error code but then when i go to my database no data has been saved
CODE:
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Jun 22, 2010
I would insert records into a MS access database with VB.net, I'm actually a c# programmer and I have never worked with databases before, I got as far as connecting but as soon as I want to add a record I get a "No value given for one or more required parameters" error. Here is the Code.
[code...]
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Apr 7, 2010
I am trying to insert a record into an access database programmatically.
I have tried 2 different ways now and they are both erroring, the current one using the INSERT command comes up with this error: Data type mismatch in criteria expression.[code]...
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Mar 11, 2010
i'm trying to set up my program to insert a new record to my database i keep getting a insert syntax error
Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
[Code].....
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Dec 10, 2005
I have been following a tutorial in a book Vb 2005 Jumpstart Ch 4..Anyway I have followed the books code exactly and the program runs.It connects to Amazons web service and allows the user to search and display books, the application also allows the user to save the titles that they wish by clicking an Add Title button, when the user does this the current focus title is saved to the database and can be viewed off line.When I hit the add title the record gets saved as I can hit the catalog button which opens a new form with a datagrid that has all the titles I just saved in it!! But when I close the app and run it again the catalog is gone?? back to no records again?Now ive never worked with SQL databases before and this is me just having a go at .Net so I have no idea whats wrong or where to look.[code]
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May 27, 2011
i m using 3 textbox field to insert data in SQL database with BindingNavigatorSaveItem_Click Button. Temporary data is saved in it but when i refresh i will disappear. it is also not saved in database BindingNavigatorSaveItem_Click code is as under
Me.Validate()
Me.VendorFileBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.ICSysDBDataSet )
how i can enter data in database name "VENDORFILE"
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Feb 24, 2011
The below code is suppose to create a database and a table with a column "FirstName" which is assigned a value "James"
Imports System.Data.SQLite
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
But for some reason the app only creates a a database which has a size of 0 bytes. Why is it not working . I am using I am using SQLite ADO.NET Provider. , VS 2010, Winforms
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Jan 12, 2011
there are two computer connect to one shared database one of the user (user1) will insert new record then the records in (datagridview) of the user (user1) who insert the record will be 11 record but the(datagridview) of other user (user2) will still have 10 record.what the possible way that may allow me to refresh the records..Also how I can make a new record in datagridview of the user2 can be colored by yellow or red back color.
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Aug 10, 2011
The system should not insert selected records from my datagridviewcheckboxcolumn if it's already existed in the database.It's like when you're registering online. If you're username/email address already registered,it would inform you that youre username/email is already registered and the site would ask you to change your username/email to new ones.The difference in my system is that i have 2 datagridviewcheckbox columns not just textboxes . Parent and Child in the datagridview. What i want to happen is that once the Code has been registered as Parent it cant be registered again as Child anymore.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Try
connectionString = ";"
sql_connection = New SqlConnection(connectionString)
[code]....
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Mar 12, 2011
I have three textbox ... textbox1 and textbox2 and textbox3
I want when I choose from date in textbox1 say 1-May-2011 and to date in textbox2 say 30-May-2011 and in textbox I type 1,2,3,4,5
I want on button click ... event the values will be entererd in database from 1-May-2011 to 30-May2011 as : mentioned below :
DATABASE STRUCTURE
ID Date Items
1 1-May-2011 1,2,3,4,5
2 2-May-2011 1,2,3,4,5
3 3-May-2011 1,2,3,4,5
so on till 30_may-2011
Record will be inserted in database according to from date and to date choosen in textbox1 and textbox2 respectively ...
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Mar 13, 2011
how to insert record into database on single button click from date to todate ? I have two textbox .... textbox1 and textbox2
textbox1 == choose from date
textbox2 == choose to date
if user select from date in textbox1 as 01-May-2011 and in textbox2 as 30-May-2011
[code]....
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Jun 4, 2011
My tables are PURCHASE and SALES...In PURCHASE table, fields are CODE(primary key), PRICE, DATE, TOTAL, QTY...when I'm entering datas in form and when i click submit, the datas stored... but when i enter same DATA(CODE), it is showing error...i don't want to show the DEFAULT ERROR message...so, i want to search whether the CODE is already in database or not...i.e When i click SUBMIT button, 1st it has to search whether the CODE is already PRESENT in table or not. if it is not there, DATAS have to be stored. otherwise, it has to DISPLAY MESSAGE BOX.
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Aug 15, 2011
Im using Microsoft Visual Studio 2010
Microsoft Acess 2010
This is for practice
Lets See First off i was able to get to insert records(Code Below)Now im trying to get the program to prompt a message when the id or field exists on the key down event and not enter it if it exists and if it doesnt exist im guessing i could use my already existing code to insert it[code].............
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Sep 14, 2011
im connect the database using the OLEDB, how to write the code when the user types '02' in textbox1, 'myname' in textbox2 and 'myqty' in textbox3, if database table itemcode field same with textbox1 then will only update the textbox2 and textbox3 in other field, if it does not exist then create the new record.
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Mar 26, 2011
when i try to delete a row . always restricting to delete on certain Table table.( DELETE ERROR tble_tombstone) message comes up.
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Dec 3, 2011
I use This Code To Save Data in Table First I delete record Then Insert record
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Jun 21, 2010
In VB6 I used ADP to confirm record existence by using this script
IF ADO.EOF OR ADO.BOF then
ado.addnew
End if
but in VB.NET 2003, How before using SQL String to Insert the record how do I confirm it's existence in the Table to prevent duplication.
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