I am trying to save my data on datagrid to access and I got this error :| Object reference not set to an instance of an object. and is referring to this Me.myDA.Update(Me.myDataSet.Tables("Goods"))
Here's my code
Public Class frmGoods
Dim con As New OleDbConnection
Dim myDA As OleDbDataAdapter
Dim myDataSet As DataSet
CODE:.......................
What I am trying to do basically is open an access query in a datagrid view and then be able to make changes to the datagrid and then save it back to the database.When I try to save:
Me.BindingSource.EndEdit()
Me.TableAdapter.Update(DataSet)
It says that update is not a member of the tableadapter... Why is that?
I have a datagrid which I am using LINQ to fill, I then add some custom columns and fill them in programmatically - if the users clicks on the column header to re-sort, all the data in the added columns disappears. I am obviously missing something very basic here but can't seem to see the forest for the trees. I also have a couple of other questions about how I am doing things:
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I have a rather straightforward question.How to I get a DataGrid in WPF to save/load raw XML files and have the ability to display/edit them with other controls? The application will only work offline so I won't need SQL. Just simply open, edit and save data to XML.
View 2 RepliesI have a form that shows users data from a sql query. What I want to be able to do is when users make a change, they press a save button, the edited/changed data is saved to a new table and then the window is closed. I've looked for several tutorials for this. Can anyone give me an example of a good tutorial or a code example?My database that the user would be saving to is called exceptionsedit.
The code I have this far is this:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles saveButton.Click
[code].....
i have been using to save any changes to the datagrid to the database which had the name statically assigned like this [code]I then decided to allow the vb program to access any .mdb file dynamically by using and open file dialog which all works fine except for my save button which again has all of the field name set statically like Record,[code]can anyone suggest a replacement for the code that would solve my problem i have also attached a screenshot with the original database or statically defined database opened can anyone suggest code that will do what the above code does dynamically so it can open many database files.
View 14 RepliesHow can i make it so i have like 3 textboxes
and if they are filled in and u click on save it all gets saved in a DataGrid Form
so after u restart the program its still there and ready for use?
IM making a password and username and website recorder and how would i save it all to a file? (and load)
View 2 RepliesI'm creating an admin application that will allow specific users to manage users login credentials for an application. On a form I have a datagrid that is populated by selecting * from Operator table on the DB. I want the admin users to be able to add, edit and delete records from the datagrid and i have enabled these properties on the grid but any changes need to be confirmed by clicking a 'Saves Changes' button. Here's the code behind this button:
vb
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
Const cSUBNAME As String = "btnSave_Click"
Try[code].....
I have added a new record but when I save these changes I am getting this error: "02/12/2011 11:43:56,frmOperator,btnSave_Click,5,Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information."
Using VS2005. The code below saves a datagrid (datagridview1) to XML file and works well. But if newPat is true then I want to save the extra data in the XML file as well. But it doesn't work for some reason. When newPat is true it just saves the XML file as normal but without the extra row.
It seems this code is not working what so ever. I tried replacing
dr("patientName") = gridrow.Cells("patientName").Value
with
dr("patientName") = "test"
And it didn't work, it still saved the names that were in the grid.
newPat = true
For Each gridrow In DataGridView1.Rows
Dim dr As DataRow
[Code] .....
ive added a datagrid view to my form and ive also linked it to a database which displays the details i need. but what if i want to delete any rows(records) from the datagrid or edit. i need it to also change in the database. whats the coding? ive tried n tried but cant seem to get the code. its vb.net 2005
View 1 RepliesBasically I have a DataGrid on a form that is used to monitor attendance. I do this by making the data types for the relevant fields boolean so that at runtime, they appear as check boxes that the user can tick. If the user ticks this then the table in MySQL saves this as a 1, or if it is left unticked the table saves it as a 0. I then use those values in a mathematical equation to calculate weekly attendance.
My problem, however, is with saving changes to the table itself. Initially I set a primary key which was fine and allowed me to save. However I needed to turn that primary key to a foreign key and when I do that, I am told that I need a primary key. Now I got round that before when I was entering data into a text box and in my SQL query I'd simply put as my value being " & (name of textbox).Text & " but when I am entering data straight onto the datagrid, I am unsure of what to put in my SQL statement.
StudentID (Was primary key but turned it into foreign key)
Name
Surname
Monday
[cod]....
My friend from college told me it's probably because there are multiple records in the database and can't distinguish between the two (as perhaps there's no WHERE clause in that UpdateCommand) but I doubt it as it was working perfectly well with multiple records when StudentID was a primary key.
I have an Access DB that lists customer details in a datagrid and in textboxes, when I use the edit button I can edit in the textboxes and when I click save the record is saved and shows in the datagrid. But when I exit the program I get "Syntax error in update command" Im not sure why because there are no errors in the error pane at the bottom
This is the code for save button
Private
Sub
btnSave_Click(ByVal
sender As
Object,
ByVal
[Code] .....
What is the code to save changes made in a project to a database (MS Access).I have a program which is a database controller for DVDs that I own, and I have all the text boxes etc there, but I have no idea how to save records to the database.
View 1 RepliesI need to make a program in visual basic that when the user presses submit on form2 it saves all the following info from the textboxes to table1 in the database.
UserID (on form1),
Reelno (on form2),
Weight (on form2)
And a dropdown menu on form 2 called type
I'm trying to save scorecard information from a visualbasic program to an access databasse. I have tried binding the text boxes but am unable to fill the text boxes with the appropriate information. So i have tried the following code:
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
Dim MySC As OleDbConnection
Dim Command As OleDbCommand
[code]....
The program runs completely and has no build errors, but I receive the following error when click on the save button.
Unrecognized database format 'F:\CINS137\BlueYahtz
Solution\BlueYahtzScore.accdb'.-Microsoft JET Database Engine
In my project the "teacher" must enter grades in the Grades database then save it and click the Semester Average button(btnSA)to display the grades in the database. Well I can't the the data to save. After I completely fill in the grades and click the save button in my tool strip I get the following error "OleDbException was unhandled: Command text was not set for the command object"
Public Class Form1
Dim connStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=GRADEBOOK.MDB"
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I have a VB2008 programme that accesses and stores data in a MS Access (XP) Database. I also live in the UK and am use to our funny old ways with dates (today is the 5th April 2010 so I want the Short Date as 05/04/2010 not 04/05/2010)
I am using the following code
Dim d1 As DateTime = DateTime.Now (#04/05/2010#)
Dim why As String = FormatDateTime(CDate(d1), DateFormat.ShortDate) which is 05/04/2020
UpdateRecord("latest", why, "backups", (index value in the table)
The last line runs an SQL query to update the table column latest to the date today but whatever I do to get the date as 05/04/2010 it is saved as 04/05/2010. I have tried setting the culture to "en-GB" at the start but this does not work. It does not matter if the latest column is in Date/Time or String format
I am not able to save an image from a form1's picbox.image into my access DataBase. How can i Save the image into access db and which datatype do i need to use for saving an image into accessdb.
View 1 RepliesI'm creating this small application that will control some equipments based on its bar code and the owner picture. everything is working fine, except the picture. is there a way to save image to access database using ADO Connections andor recordsets? I've head its possible to store the path and the retrieve.
.AddNew()
.Fields("Nome").Value = txtName.Text
.Fields("CAI").Value = txtCAI.Text
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I'm doing project using richtextbox and want to save the contents in Access. But my contents is a list and when I saved it, the list become one line, with a square to space it. Can it actually be done? I set the column with memo type. Here's my code for save it.
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i am getting this error and i cant spot the mistake: No value given for one or more required parameters.
my code:
Sub UpdateCustomer(ByVal HCNNO As Double, ByVal Forename As String, ByVal Surname As String, ByVal DOB As String, ByVal Gender As String, ByVal PasID As String, ByVal
[code].....
I think I have a simple problem but I have worked on it for many hours over the last few days without success. I am just trying to save a new record with VB 2008 to a very simple Access db with 4 fields in "Table1": "Part Number", "Description", "QNTY" and AutoID. The latest error that I have trapped is "Syntax error in INSERT INTO statement". Here's what I have:
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I have been using an Access Database with no problems, using a form (with a sub-form) to input all of the data. Recently the data on the sub-form is not saving to the tables/reports. I enter the data, save and close the form and re-open the record and it is not there. Previously I have been able to save all data using the form and have not altered the form.
View 3 RepliesI am happy that there is a forum like this with very supportive people.So on topic.I am a student creating an Inventory System software for my school using VB on VS 2008.I am having trouble saving items from a DataGridView to Access 2007.The codes I browsed here are quite different from what instructors teach us at our school.These are some of the codes we are using to save items from textboxes to Access 2007 database with a table named studenttable and database named student for your added information.
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I am using thprocedure "UpdateDatabaseBySQL"to save data in to my MS Access table using VS 2010. The problem is, sometimes when I retreive the values from the database, they are blank. But my save procedure worked well. If I pause the app for 10 seconds and query,everything works. So what I did was add System.Threading.
View 22 Repliesrs.Open("select * from CSOptions where OrderNumber = '" & cbstrCurrOrderNumber & "' and OrderLine = " & CBLI, strConn, 2, 2)
If rs.EOF Then
rs.AddNew()
End If
[code]....
I have tried it by the following code [code]there is no error in this code, but it didn't work well.so is there anyone who can help me in making it work?
View 1 Repliesthis code worked in every form except this form which I named Reregistration the code is working and every thing but the only problem is that the new generated data is not saved in the actual table
Private Sub btnRegister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRegister.Click
If txtPassword1.Text = txtPassword2.Text Then
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I tried this but does not work..
dsNewRow.Item("picture") = PIS.PictureBox3.Image
Private Sub PictureBox2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles PictureBox2.Click
openimage.Filter = "All Files|*.*|Image Files (*)|*.bmp;*.gif;*.jpg;*.png"
[code]....