Database Not Updating After UPDATE SQL Statement?
Mar 18, 2010
I currently have a problem attepting to update a record within my database. I have a webpage that displays in text boxes a users details, these details are taken from the session upon login. The aim is to update the details when the user overwrites the current text in the text boxes.I have a function that runs when the user clicks the 'Save Details' button and it appears to work, as i have tested for number of rows affected and it outputs 1. However,when checking the database, the record has not been updated and I am unsure as to why.I've have checked the SQL statement that is being processed by displaying it as a label and it looks as so:
UPDATE [users]
SET [email] = @email,
[firstname] = @firstname,
[code].....
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Nov 15, 2011
update statement, i am trying to update a row within a access 2007 database here is my code.
[Code]...
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Jul 15, 2010
I have the following code:[code]When I run it, looking at the debugger everything looks okay but when I check the database table it is supposed to be inserting into - the column values (for occupantnum) haven't changed - they are all still null! Not sure if this is related, but note that I've now updated j to explicitly be an integer. I noticed while debugging that wResident.occupantnum was appearing as Type "Integer?" - but this doesn't seem to have made any difference - when I rerun it it still says Type "Integer?"
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Sep 30, 2009
con.Open()
sql = "select * from songs"
da = New OleDb.OleDbDataAdapter(sql, con)
[code]...
it says syntax error in INSERT INTO
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Nov 8, 2010
On a form i have several text boxes binded to a bindingsource and including a datagridviewI have populated the textboxes with database fields successfully and the datagridview displays the correct information.I have the following code to save the information to the database but i cannot get it to work. [code] I have tried many code examples here in order to save the data, none of which has worked.Can anyone please help me with this?
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Jan 25, 2012
i just want to just make the right codes in my program.. the problem is when i search using may txtbox and using the wildcard sql command. everytime i type letters it search the database.. but the other textbox is not changing on the selected one in database. heres the code :
[Code]...
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Aug 27, 2009
I am using VB 2008 Express, connected to a MS Access database for some reason my update command is not updating my database.i may have something wrong [code]whats wierd is when i change UpdateCommand to SelectCommand, it will update the database, but it makes other things in my program malfuncation, so i cant have that as SelectCommand, there must be a way to have it all work with the Updatecommand ..
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Mar 11, 2010
my simple update statement is not working on my database software with .mdbCompanyDa.Update(CompanyDs, "DisplaycenterData")it works but only in cache, when i restart my application the record is not updated.i solved my problem with some informal steps. i m attaching vb projects zip file, plz open coding for update button and Help me with simple coding.yes one important thing i need help and suggestion for is that in that project and forms are working nice, but with form i m facing problems, specially i cant update new added data/record, it returns error enven i follwed very same coding patterns and formate as i used in other forms in this project, i tried again and again but faild to solve the problem, i also changed table name and fields in database table but it still not working, and coding of other forms is working nice and 's update coding is not working.(update coding for company and book entry form is working and it is not working with purchase5 form, plz help to solve the problem)plz help me with simple coding and removing above mentioned error.to move between all three forms plz click related button at bottom of each form.
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Sep 28, 2009
I have an issue with a data base updating it won't update for me in debgging mode it is stopping here on this bit of code which is highlighted in red. the error which comes up is .(update requires a valid update command when passed datarow collection with modified rows.)
Public Sub UpdateDataSource(ByVal ChangedRows As database.dataset1)
Try
'The data source only needs to be updated if there are changes pending.
If (Not (ChangedRows) Is Nothing) Then
[CODE]...
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May 29, 2009
I am completly flummoxed!!! I have writen code for updating my table from a form but when I use the same code only changing the table names it wont work I get the following message: "Update requires a valid Update Command when passed DataRow collection with modified rows" My codes are as follows:
[Code]...
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Apr 5, 2010
I have a form with comboboxes, if the user doesnt select a value in the box I want a null to be sent to the database. The insert works fine, i look at the record in the db and see the null. The update doesnt work. gives me a n "Update statement conflicted with foreign key constaint....."
Public Sub Update()
TableAdapterCreate().Update(ID1, ID2, CType(cbox1.SelectedValue, Integer), CType(cbox2.SelectedValue, Integer), CType(cbox3.SelectedValue, Integer), CType(cbox4.SelectedValue, Integer),
[CODE]...
As I step through the selected value of the cbox 5 is shown as nothing (which it should be because the user didnt select a value for this combobox). I assume this needs to be a null instead of nothing to get written to the database. the combox boxes need to match a primary key in another table so sending a 0 would also result in the forieign key error since the related table does not have a 0 ID field.
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Nov 6, 2009
I have an application to re-sequence some items based on a an alphabetical ordering of the items from another table. I couldn't create an update statement to update the database when I pulled the information by a join query, So I pulled down both tables into a dataset with an XML Schema description where the two are related by the itm_id key as in the database. I then have two datagrids one with the items and one with the bound to the relationship this allows only the records associated with the itm to be displayed in the datagrid, I then run a loop that changes to sequence number for each corresponding record,this all works fine but then I go to update the back end database.
The update from the dataadapter executes successfully, but then if I reload the dataset from the database back end I find that the update did not actually update the records on the back end. The only record that was updated was the very first record which updated with a 0 then all the others did not take, I have re-run it several times and they will not take.
Me.Cursor = cursors.WaitCursor
odbaCatItem.MissingSchemaAction = MissingSchemaAction.AddWithKey
odbaCatItem.SelectCommand = odbsCatItem
[code].....
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Mar 11, 2010
I am using the following code in my vb.net while using that code it will show me syntax error. Private Sub updateinfo()Dim con As OleDbConnection
[Code]...
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Jul 27, 2010
I having a problem in my website where I have 2 objects held in session, both object are structured differently and do not have any links to each other (not intentionally). Both objects however, have a collection of "Travellers". What I am trying to do is modify one collection by adding or removing "Travellers", when a finish button is clicked, the modified collection will then be saved to the other object.The problem is that for some reason when I modify one collection in one object, the modifications are also made to the collection in the other object.[code]The issue is the Travellers collection within the object "BookingContext" is being updated when I add and remove from the collection within "PersonSearchContext". It's as though there is some sort of link or pointer between them.
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Apr 16, 2009
I have a datagrid with data and I want to update a database with the data on the datagrid. I only want to update one column, the problem I have it is that the Column it is name diffrent on the datagrid than the database. On the datagird it is name "EloBirdFinal" and on the database it is name "EloBird". I did some code but it didn't work. I will put my code here
Dim RowCount As Integer = DataGridView1.Rows.Count - 1
Dim ColumnCount As Integer = DataGridView1.Columns.Count - 1
Dim RowIndex, ColumnIndex As Integer
[code]....
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Sep 11, 2011
I have a vb.net project where I have data loaded into a datatable in a dataset and have to do approximately 20 updates that are sql like. On this project, I don't have access to sql nor does the end user want to use any type of sql, sql express etc.
My question is, is there a generic way of doing this so I can reuse it. Was wondering if a dataview could be analgous to the "WHERE CLAUSE" and some type of delegate function could be the update function.
[Code]....
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May 29, 2010
I have a vb.net project where I have data loaded into a datatable in a dataset and have to do approximately 20 updates that are sql like. On this project, I don't have access to sql nor does the end user want to use any type of sql, sql express etc
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Apr 10, 2012
I am working on trying to update a list of items to an Excel spreadsheet. I have created my own custom class called Songs and a List(Of Songs) that I want to update the spreadsheet with. It seems like everything is working -- I have even put in a debug msgbox that displays what Song it is currently on while iterating thru the loop -- but after the code iscomplete, I check the spreadsheet and only the first song in the list gets updated. I'm thinking it must have something to do with either the connection string or the parameters that prevents it from updating any other song records. BTW, there is no errors being tossed so it ats like it everything is being processed, just that the data doesn't change for the update inside the loop. Here is the section of
Private Sub btnProcessList_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProcessList.Click
Dim adoConn As New Ole.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;data source='" & _
[code].....
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May 17, 2012
im new with vb .net and im currently developing a simple information system for an agency .. im almost done with it but there seem to be a problem with my update statement for the change password code here's my code..,[code]
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Nov 16, 2009
I'm working a code to do an update statement but I get an error. I have the name of the column in a variable I added a parameters to pass the value but I get an error. The error says that Parameter @Ronda has no default value?
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Jun 23, 2009
I am fresher in vb.net but I have experience in vb 6.0. But I want to connect database in sql server through sql connection. In that case how to create connection with window or sqlserver authintication mode and how to add or update new record in data base in batch transaction. Please help me with sample code.
So that I can understand eassily.
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Apr 27, 2012
I'm trying to update a specific record based off of a users selection. Regarding Entity Framework syntax, I'm not very familiar. Is it possible to achieve this SQL statement in Entity FrameWork?
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Apr 21, 2006
I'm trying to refresh the datagrid after using the SQL UPDATE statement. The data changes physically in the database but the datagrid is not affected. The data is changed only after i restart the program.
How can i get the datagrid to refresh or update? I have tried using, among other code, the refresh() method, but it does not work.
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Mar 12, 2010
I'm getting a strange syntax error when I run this in VB[code]....
The Username is checked before getting to this part and is definitly in the db. It gives an exception saying syntax error in update statement.
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Nov 29, 2011
When run my code, I get this error when I try updeting my database:
"Syntax error in UPDATE statement."
Here is my code snippet.[code]...
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Feb 28, 2011
da.InsertCommand = cmdBuild.GetInsertCommand(True)
da.UpdateCommand = cmdBuild.GetUpdateCommand(True)
da.DeleteCommand = cmdBuild.GetDeleteCommand(True)
[code].....
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Apr 4, 2012
I have the following code which works fine;
For Each myFile As String In IO.Directory.GetFiles(Label1.Text, "*.zip")
Dim fi As New System.IO.FileInfo(myFile)
sFilename = fi.Name
Col_Prac_no = sFilename.Substring(1, sFilename.IndexOf("_") - 1)
For example: I have filename as:
I00018_20120329042035_111
The col_prac_no = 00018
Now, I want to update the for statement to have another value extracted from the filename.
The first letter of the filename. In the example:
I00018_20120329042035_111
The first letter of the filename in above example is I.
So if we have:
S00018_20120329042035_192
the value will be - S.
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Oct 7, 2010
I want to update the table in access database the code is following please guide me i am new with vb 2008.da.fill(ds) becomes yellow when i see the detail wrong sql statment.but in java same statement work correctly.
Private Sub Changebtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Changebtn.Click
If TextBox3.Text = TextBox4.Text Then
[code].....
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Feb 18, 2011
i need a update statement to make a record = 1 example : the colum what need to change is active and it must stand on 1 to show you in to a listview (that part works) but i need to do it manualy to make them active now i liked to when the login is a succes then the record = 1 for you this is my code :
Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim adapt As MySqlDataAdapter
Dim sqlquer = ""
[code].....
i get this error : Object reference not set to an instance of an object.
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Jun 27, 2012
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim s As New Staff
[Code]....
Basically I am trying to update each record with 2 random numbers each time the button was clicked,my problem now is, the system will update the record but the data was wrong. Example, by right all data should be different (randomly string) but for some row it was updated with same data but in randomly, something row1 row2 row3 has exactly same data for column 1 and 2 then row 3 has distinct data, second time, row1 row2 same data row3 ro4 with different data. It is in random sequence. When I add a MsgBox to do testing in the For loop the data was updated correctly with all different data.
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