VS 2008 Updating A Access Db From An Arraylist?
Jun 30, 2010
I have a access db that contains logs in it from a project of mine. I have set up a total of 10 columns per row for log ids to be inserted ex: Log_1, Log_2, Log_3, etc...
The logs are pulled from an XML file that I downloaded and extracted from in an array list: log_id_1, log_id_2, log_id_3, etc...The db columns are a fixed number, 10. While the log id in the array list are variable, from either none upwards to about 20 of them.
If my arraylist has more entries in it than db has positions, I dont get an error, but if my array list has fewer than the 10 fixed columns in the db, I get an index error.What should I do to fix the error, capture the error and ignore it or is there another, better method?
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Oct 13, 2011
I can do this with a for loop, but I was just curious if an arraylist can be updated using a for each loop. ie
For Each arrItem As String In myArrayList
arrItem = "My Stuff"
Next
If I loop through the arraylist again the values remain unchanged.
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Dec 8, 2010
I am trying to run an update query that I created in Access thru VB.
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Sep 21, 2010
What I need to do is read an ArrayList in My.Settings and add another ArrayList to it. The first think I'm trying to do is load My.Settings.Records into myArrayList. I'm not quite sure on the proper way to do this. I've tried things such as Dim myArrayList As ArrayList = My.Settings.Records, I'm not sure if I need New and I'm not sure if I need .Clone or .CopyTo.
Then I have another ArrayList myArrayList2. To get this into myArrayList I've done: [Code] Then to save it back to My.Settings I've done. My.Settings.Records = myArrayList. The problem is I keep on getting Object reference not set to an instance of an object error on the AddRange line. My.Settings.Records is definitely an ArrayList and it will sometimes = Nothing. The objects will only ever be strings.
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Jun 1, 2012
I have a datagrid that is loaded from a data source called ManualKanbanDataSet. The Access DB is ManualKanban, the table is "Parts". I've set the column properties of the column I want to change to readonly=false.
I make changes to the data in the datagrid, click my update button and nothing updates. here is the update
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Try
Me.Validate()
[code].....
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May 25, 2011
I am trying to make changes to parts of an Access table but can not get the database values to change.I am able to get the datasets and things in VS to change, but the database never shows the changes.
I Have:
' Create an instance for the payrolltable
Dim dt As New MsPeachDataSet.PayrollDataTable
[code]......
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Jul 28, 2009
I have spent several hours trying to delete a row and insert a row into an Access database using the OLEDBDataadapter and dataSets without any success. I don't get any errors it just doesn't update the datatable. Here is the last version of the code I have been trying to get to work. I have done a lot of searching and have
Data save
Private Sub SaveNumDte(ByVal ltoNum As String, ByVal ltoDate As Date)
Dim numTotal, x, MaxRows As Integer
[code].....
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Mar 24, 2010
I have a datagrid view that displays information from a table. Changes I make to the data grid view are not saved. I have a button called btnsave but I have no idea what to put in the click event to save changes to the DB.
vb
Dim ConnStr As String = String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0}", DataDir)
Dim conn As New OleDb.OleDbConnection(ConnStr)
Dim sql As New OleDb.OleDbCommand("Select * FROM USERS")
Dim dt As New DataTable
[Code] .....
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Jun 18, 2012
I'm having trouble updating my access database using DataGridView1 on my form. I created a DataGridView on my form linking it to an access database data source. At run time, the DataGridView shows the content of my access database. When I edit the database data in DataGridView, it looks like the database is being updated but when I close the form and reopen, the database is not updated. Do I have to write code and assign it to a button to update the access database? Is there a way to update the database once a new value is entered in the DataGridView? Am I missing a setting that does this automatically?
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Mar 23, 2009
I am stuck, I dont know why the following is happening.
1. Open program.
2. Click on a record in listbox1 (It then put all date of this row in the textboxes)
3. Change/ edit info in textboxes
4. Click on edit button.
It does not update and when it updates it does not put all info in, or dit makes a new row of data.I don't want it to make a new one, it must update it.
[Code]....
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Jul 26, 2011
I have a small program with Members table and for subscription. The table has a joindate, expirationdate, status and gracedate collumns. When I run my program n click on a button I want the program to update the STATUS text by checking expirationdate column if is greate or equals to todays date then Set it to Expire.[code]Here is the error message I get on runtime: Syntax error in string in query expression 'Expirationdate <= '26 July 2011'.All I need is to change the status text into Expire if expirationdate <= todays date.
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Jun 12, 2011
I'm using Visual Basic Express 2008 to create an interface with a order database in MS Access 2007 (.accdb file). Everything is fully functional except updating the "Inventory" table is very slow. Updating around 2200 items takes almost 2 minutes and the window will appear as "not responding" for the duration if you click away and come back. Here is the process:1. Tab-delimited text file is picked by user, which includes all inventory items (not just new ones)2. Each line from text is parsed and read into variables (tempSKU, tempItemTitle, etc.)3. Old items are updated and new ones are added. -> This is the bottleneck
I used to have a series of IF statements to check which elements were changed and report them, but that was about 2x as slow. The new code is a little faster but doesn't provide the feedback I liked (update part is commented around):
Private Sub btnImportInv_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) andles btnImportInv.Click
Dim strName As String
[code]....
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Aug 25, 2010
I have an access table that I'm loading into a dataset, then I'm binding the dataset to a bindingsource. The bindingsource is the datasource for a datagridview. I can use a command builder to update the entire table, but I need to update all the rows (or changed rows) in specific columns. I have a column called "dPrint" which is Boolean. I'm not sure how to use the bindingsource as my datasource in an Update Command. I've tried this:
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Aug 22, 2010
Only my local dataset updates when adding, deleting or editing records.The Source Database is supposed to update on issuing DataAdapter. Update(dataset )However, when I check my source database after running the operations it remains the same as the original.
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Oct 28, 2010
I have a hashtable in my program wich I call just table1.I use integers for keys en arraylists as values.Now, I'm wondering how i can acces those arraylist because it always gives me an NullReferenceException
Dim a As New ArrayList
a = table1(31)
For i As Byte = 0 To 9
MsgBox(a(i))
Next
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Apr 16, 2010
I have an arraylist:
[Code]...
I know how to use <%#Container.DataItem%> to dump everything but I need to get at the items in the array individually, not have them all ditched out to the page in one go. For example, item 1 contains a link, item 2 contains an image path, item 3 contains a description. I need to have them kick out in the correct order to build the link and icon correctly.
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May 5, 2010
I have the following update statement to save data to an access 2007 DB:
[Code]....
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Dec 1, 2011
What I am doing is iterating through all the groups that belong to the top group (Generic reports). Then I take advantage of the GroupPrincipal.GetMembers(True) which will recurse through a given group name. I test to see if the user exits under that group and if true I put the group name in an arraylist.
I use the for each principal in GroupPrincipal.GetMembers to loop through each returned user to see if they exist.
Is there a way to put all the returned users Principal.Name from a given group in GroupPrincipal.GetMembers into an ArrayList? This would allow me to to use Arraylist1.IndexOf to search for user. Which would be much faster then iterating through a returned list using the for each construct.
Sub RetAllMbrs(strUser As String)
Dim oPC As PrincipalContext = GetPrincipalContext() '<- this is function somewhere else in the code
[Code].....
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Jan 11, 2012
I have a problem in Treading.I have a code like this;[code].....
I want to change ListBox1 with ArrayList. But I couldn't find how to use adding a string to ArrayList in tread.
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May 6, 2010
I have an arraylist (arrFirstArry) which I use to populate another arraylist (arrNoDuplicates) preventing any duplicates from being added. This works fine. What I would also like my code to do is prevent adding any partial values which may exist from being added. i.e. my array is like this
[Code]...
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Sep 22, 2011
I have two structures Public Structure myResearchData
Public batchName As String
Public arraylistRData As ArrayList
End Structure
Public Structure myResearchSubData
Public researchDescription As String
[Code]...
Cleared MyResearchData.arraylistRData for new data to be put in but it also clears the arraylist inside MyResearchDataAList and didn't old the contents of the arraylist
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Jun 2, 2011
I have searched and cannot find out why my code will not update the database.The program stops at the mDA.Update(mDS, "temp_data") line with the following error:
System.Data.OleDb.OleDbException was unhandled
ErrorCode=-2147217904
Message=No value given for one or more required parameters.
[code].....
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Nov 4, 2010
is d query rite ?q = "update FIRSTBBA WHERE FBBANAME<>"" ORDER BY FBBANAME"Need to update a table in ascending order
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Dec 15, 2011
created a small application that I'm able to add items from an access DB to a ataGridView.Now, My questions is: suppose that I have a list of item in this DGV,containing name and Quantity. Now I would like the database to be updated with new values on Quantity column, something lke this: (Current values - Quantity on DGV).
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Aug 17, 2009
I have a form with tabcontrols and datagrids in my accessfile I have 35 tables.I have set the datagrid to edit by enter and I use this code to update the tables:
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Oct 21, 2011
update record in my mdb this is my code but it updates only 2 fields yet I have five so update the rest
[Code]...
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Apr 2, 2010
I'm having problems updating my existing access database in vb. Whenever I exit my program, the changes made won't save. How can I correct this? This is the code I have so far...
Code:
Private Sub Customer_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'AutioEssentialsDataSet3.Customer' table. You can move, or remove it, as needed.
Me.CustomerTableAdapter2.Fill(Me.AutioEssentialsDataSet3.Customer)
[code].....
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May 14, 2009
I wrote this code in asp.net(vb):
dim dbconn as New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;data source=" & server.mappath("../kri1.mdb")) Dim DBCmd As New OleDbCommand Dim DBAdap As New OleDbDataAdapter DBCmd = New oledbCommand("INSERT INTO tabela (@id, @nesto, @ime)", DBConn) DBCmd.Parameters.Add("@ID", OleDbType.smallint).value= 6 DBCmd.Parameters.Add("@nesto", OleDbType.varchar ).Value = "2" DBCmd.Parameters.Add("@ime", OleDbType.varchar ).Value = "3" DBCmd.Connection.Open() DBCmd.ExecuteNonQuery()
and nothing happened in my database and there's no compilation error?
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Aug 12, 2011
This is the code for my 'validation' form, which reads stored numbers in an access database and compares them against generated lottery numbers to check for winners. It assigns divisions and prizes to each gameID from the table in the database and is supposed to write this information back to the database. However, I get an error on the very last line of code where I tell the data adapter to update the table in the database with the dataset. The actual error it gives me is "InvalidOperationException was unhandled". Here is my code (ask me questions for any clarification):
[Code]...
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Jul 13, 2011
I have a access database named login.mdb,which has many tables.i want to update table named "try".in tat table i have two fields viz name and rollnumber.i want to update rollnum of corresponding name.[code]...
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