Sql - "There Is No Row At Position 0" But Records In Database?
Nov 22, 2011
Having a DataSet problem in VB.NET/Access.Code should return 1 record and display results on a form Basicially when step through the code in debug it returns 1 row and works fine, but when I run the code without breakpoints I get "There is no row at position 0"
[code]...
When I run the code, I get the messagebox saying No Records.When I run in debug mode with a Breakpoint on the IF statement, I get the messagebox saying No Records. When I run in debug mode with a Breakpoint on the FILL statement, I get the 1 record returned and code in If statement executes.
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Feb 8, 2010
I have two grids displaying records of employees like name, job no, and position . Now I have to swap their jobs from Emp A to Emp B which is from one grid to other.
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May 17, 2006
I can retrieve records from my Database fine, but I'm having trouble updating records. I am getting a syntax error on [code] I get this error when I change the Last Name (Row 0, Column 1). [code]
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Oct 27, 2009
how to get records into oracle database delete from db & update the records i have successfully connected my vb 2008 win form with oracle 10g.
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Dec 24, 2009
I'm currently working on a program that involves a listbox, database and some (rich) Textboxes. Let's assume I'm making a contactlist program.The database connection is established, placed 'ContactName' in listbox.When you click on someone's name in the listbox, I want the program to get the data of that person and show that data in RichTextbox1. I've spend hours thinking how to accomplish that but all I got was headaches.
A second thing I would like to do is to place a textbox on the form and when you type a character it removes all the entries in the listbox except for the ones that matches.So if I'm searching for John Doe and I type "John" in the textbox I would like to see all the John's in my contact list. Or when I search for John and only type "oh" I would like to remove all the items that don't have any "oh" in their names. (Search box)
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Jun 12, 2011
Im using VB.NET 2005 i want to sum two records in database. So when i retreive them to display in my textbox they already sum. the numbers are in text.
this is my code.
con.Open()
cmd = New OleDbCommand("select * from ChargedItems where name ='" & Me.cmbfnameEarnings.Text & "'", con)
[Code]......
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Jan 11, 2011
I have the code below which does work, but I need to add further functionality to it. The functionality I want to add to it is the text I have commented in the code below.
Dim objSQLConnection As SqlConnection
Dim objSQLCommand As SqlCommand
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
[code]....
Before the if statement, I want to find out if the database already has records with the username in the strUser variable.
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Jun 2, 2011
i have some difficulty in displaying records from database to my combobox here is my code in the form_load
Private Sub Form5_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim con As New SqlConnection
con.ConnectionString = "Data Source=.SQLEXPRESS;AttachDbFilename=C:UserslitoDocumentsQMP_DB.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"
[code]....
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Jan 15, 2012
I'm very new to using VB.Net so I found it quite difficult to understand other answers that I searched for.
Basically, I have an project to develop where a user can create an account, and log in with it.
So far I have :
Created a database in ms access with the relevant fields (2003 edition)[code]...
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Aug 29, 2008
I need help with adding a record to a database.I have a database with multiple tables. How do I add a new record to one of the tables without using the BindingNavigator.Lets say the table's name is tblDetails and the fields are:NameSurnameCellAddressI have a number of text boxes on my form:txtNametxtSurnametxtCelltxtAddressI want to add the details from the text files to the table and a new record.
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Jul 11, 2009
Im practicing a database and I have a 3-column table. Im using binary formatting to save/open the file. I cant see what is wrong with my code“
I can display records ok when I press the save button
I can also save the records ok when the save/close button is pressed.
When I reopen the programme and press the reload button to reload the dataset, additional records will not be displayed nor saved though original records will be showing.[code]...
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Jul 21, 2009
I have 3 combo boxes full of data. I have an access database with a table and 3 fields. I am using the following code to insert the data from the combo boces into each field of the database. The program runs and I get no errors but the data is not going into the table.
Dim DrawCount As Integer = 0
Dim DateStr As String = ""
Dim TimeStr As String = ""
[Code].....
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Jan 15, 2011
now i got a problem deleting records in the database
this is my code
Dim myConnection As SqlConnection
Dim myCommand As SqlCommand
[code].....
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Nov 24, 2011
I have a table in an access database that binds to a datagridview with a binding source. The table is named Charges and contains all the charges to a lot of accounts. Let's say I only want to display the charges that are associated with Account ID = 1.
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Feb 22, 2009
I Have made a database and connected it using VB.net 2005. I try to enter new records into the database and i can update the dataset but not the database itself, i write the code to update the database and i get an error saying[code...]
Here is the code for the whole thing, I click btnNext to display the next recrod and want to change it by clicking the update button but this is when the error comes up'[code...]
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Jun 30, 2009
i have this problem on retrieve 3 records from database.i did it in a way that i have a few button.when i press on one of the button which have a value of bee then it will go into the database and search for bee.it will return me the result on bee at the same time it will also return both top and bottom record of bee.
How do i do that in SQL or VB.NET
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Apr 5, 2010
How can I create a search box to search records in a sql database? I plan to use the search-box in the same Form where I have a details view interface to the database table.
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Aug 27, 2009
I typically dont use a dataset in a case of new data insertion to the database. But then again, I will run in a problem the weather the inserting data already exsit in the database. Therefore i need to perform a search first. However, if i follow this it will take slow down the application (if the table has 1 million records). One way i could optmimize this is to load the whole table in to a dataset then the application doesnt have to go to a back end trip nwo it can search inthe dataset. Is this the standard way for inserting records?
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Mar 13, 2009
having a bit of trouble with inserting records into my database. I have the following code:
Dim mypath As String = Application.StartupPath & "\Data\Contacts.mdb"
Dim mypassword As String = ""
Dim inc As Integer
[Code]......
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Jun 9, 2011
I have a very annoying problem with adding new records to my Access Database, I'm not getting any syntax errors but there's obviously a symantic error of some kind causing this headache. I've been developing an RFID system for two months now and spent the last four weeks trying to fix this one issue, if anyone can see wher
Private Sub m_btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles m_btnSave.Click
Dim da As New OleDb.OleDbDataAdapter
[code].....
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Mar 18, 2011
when using the ExecuteReader() command with an SQL database, with an example as follows:
DUReader01 = DUCommand01.ExecuteReader()
DUReader01.Read()
DUCounter01 = DUReader01.Item("Counter")
I am looking for a simple code example that will test to determine if the database first is empty before attempting the Item()
command.With the above example, the Item() line produces the error "Conversion from type 'DBNull' to type 'Integer' is not valid." for an empty database.
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Jun 12, 2011
As part of the application I'm writing in Visual Basic, I have written code to display records in text boxes and cycle through each of them one record at a time. I'm having trouble getting the code I've written to update records to work however. I am new to this however, so I'm sure I've made an obviously glaring error that you more experienced people can point out for me:
Public Class frmRecords
' VARIABLES TO AID NAVIGATION THROUGH RECORDS
Dim moverow As Integer
[code]....
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Feb 10, 2006
Erm I am still a freshman who still learning Visual Basic and I'm currently facing a problem regarding adding a new record and updating my database records in the form, or the whole project.
If MessageBox.Show("Do you want to save the data?", "", MessageBoxButtons.YesNo) = DialogResult.Yes Then
Me.ArtistsBindingSource.AddNew()
[code].....
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Jun 10, 2009
I used visual basic 2008 express edition and I read the "How Do I" tutorial and I went over with it but there are still some instances I can't find or figure out and I need some assistance. I used the LinqtoSQL classes in my project, I have one database and has one table in it,now here is the output of my project.Everytime I first run my project I would be able to view all the records in the table that is inserted in the datagridview on one of my form w/c has existing records that Ive added when I input records when running but when you add new records into it and after adding the new records when you view it right away it would only display the records in 4 fields or 4column of my table and I have 8 fields or 8 columns in my table the rest are blanks but when you exit the program and run it again that's the time you can be able to view all the records in the datagridview attached on a form.I want that when I add records and view it would display all the records w/out needing to exit the program.
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Aug 24, 2009
I have looking for a tutorial or class that demonstrates more than a trivial example of saving a windows position on closing. The ones I have found don't seem to work on all systems because of:
1. Multiple monitors. (and resolution between those monitors)
2. Toolbar size and position (toolbar is only on the primary monitor, well sometimes)
3. Sometimes the programs dont open on the right monitor they were closed on.
Is there an extensive class or tutorial on all the stuff a programmer needs to get right to have a window size and position persisted between executions?
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Dec 5, 2010
I am using the following code to populate data in Textbox1:
[Code]...
I have few functions assigned in TextBox1_TextChanged event. The problem i am facing is this event is fired twice, once after the Fill command and another after the Position command whereas i want the event to fire only once after the Position command. What should i do?
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Nov 19, 2009
Ive created a form to add/delete/update records in a database ,but when i try and open the frm i get a NullReferenceExceptionUnhandled error, below is my code, i cannot for the life of me see where i've gone wrong, but maybe someone else can spot it?[code]
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Jun 2, 2011
i have one website which have only html pages.I want to add one page that fetch records from sql database is it possible??what should i do for this task??
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May 15, 2011
I have been trying for a month to get a row added to an Access database and can not do it. I have the databindings all set and can select different records, but can not add a new one. I have tried BindingSource.AddNew.row() but can't figure out how to add data to the new row, nor does it show in the database.
I have tried
Dim ds As New myDataSet '<---Change this to the dataset name on your form
Dim dr As DataRow
dr = ds.Tables("Students").NewRow
[Code].....
But that doesn't do anything at all. No data added, no errors. I have tried updating a datagrid to be told it can't be updated when bound. I look on google and nothing seems to relate to adding data to an access database when bound to the project through the datasource wizard.
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Aug 19, 2011
I have the following code which I hoped added a row to my DataGridView and also a record to my database. It does the first part, but not the second.
Dim row As DataRow = Me.CCLogDataSet.tblLog.NewRow()
row("cc_log_contract") = Me.txt_Log_Add_Contract.Text
row("cc_log_registration") = Me.mtb_Log_Add_Registration.Text.ToUpper()
row("cc_log_milage") = Me.txt_Log_Add_Milage.Text
[Code] .....
It seems to be storing the data in memory? As the data in the DataGridView is persistant, even after a Relaunch of the application. However, why I query the database, there are no records in it.
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