I am new to VB.net and want to know how I can execute SQL queries from within VB.net code. Example: I want to update some records in a table using SQL query on the Form Load event.
View 2 RepliesI have a form in which I am updating records to table Users in database China.accb. The btnClick sub successfully updates the Dataset. However, the actual table Users never gets the update. What am I doing wrong? The code is below.
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I need to do a query in which I can find all records in a table in which a user enters a search word. The word to be searched for will be a word in a column. If there's a table named solutions and in the table there is a field named description; i need to be able to pull up all records where for example the search word is 'printer' is in the description column. I don't have any code or database structure to show. I first need to know if this can be done. Can someone supply a code snippet example or tell me what SQL keywords will do this, or some pointer?
View 4 RepliesI used following code searching records from a table in MsAccess and displaying in a Listview and it is working fine with the search criteria based on Discription.
CODE:
I also tried the above code to search records on the base of CustId and it worked fine too.My table DailyTransaction in MsAccess is as under:DTDate, DTTime, CustId, Description, Quantity, Price, Amount, AccountNumber, Name
Now I want to Search records on the base of Date I tried the following but it did not work.
Dim cmdText As String = "SELECT * FROM DailyTransaction WHERE DTDate=' " & TextBox1.Text & " ' "
Also i want to make following sort of query to retrieve data between two dates and to display the sum of amount group by DTDate. I could sketch following query and deifinitely it is so wrong with Syntex.Select * From DailyTransaction where DTDate Between textbox1.text AND textbox2.text Group By DTDate AND SUM(Amount)
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]
View 4 RepliesI have a form that is not updating. Just wondering if anyone can see an obvious error.
Private Sub SaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveStoreButton.Click
Try
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So on the form close I want to update the SQL table with changes that have been made through the text boxes I have. Text boxes populate with respective data (last name, first name, username, etc) and I have the correct SQL query as I've executed it and it works. I have it set up that a msgbx will open and clicking "yes" will confirm the change and update the SQL table.
When I click "yes" the form stays open as it is looks like it is still updating/loading/something I can't confirm and it does not move on to my next form_close event. I'm fairly sure I missed something with the SQL command to actually update the table
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I read that by using queries instead of SQL, the form can load faster, however, I have this code that has categories and sub-categories how can I shorten this code to have the form load fastr?
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why cant i display my 2 table records in two datagridviews in windows form? it only display the records of table 1 to the 2 datagrid views
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I have a database with 3 tables: Student, Unavailability and Duty.The fields for Student are entered in a form I have. One of the fields in Unavailability is filled by a form, the other fields are an autonumber and a foreign key to the Student table.ow I want records in the Duty table to be created and automatically filled in depending on what the values of the fields are in the Student table.For example, If the Boarder field in the Student table is 'yes' then I want the Duty Number field in the Duty table to be '1', '3' and '4'. If it is 'no' then I want the value to be '2' and '5'. I recognize it will have to create several different records to incorporate the different duty numbers for each StudentID. Obviously this will require an if statement, however this is my first time implementing a database with my limited experience with programming and Visual Basic, so I don't know how to refer to the specific fields in a table and set the value of other fields depending on the data in other fields.
View 6 RepliesI'm receiving the following error when trying to use a table adapter to Load data into a form.
"Too many agruments to Public Overridable Overloads Function Fill(dataTable As BCPM_DDBODataSet.LTC_FBSDataTable) As Integer"
I'm using a TeraData backend and this is pulling up the form based on selection from search results.
Search Form:
Private Sub cmdSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSearch.Click
Me.lstResults.DataSource = Nothing
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I want to know how to Update / delete the table records in ASPNETDB.MDF in single update / delete query ?
View 1 RepliesI have this piece of code wich works perfectly when inserting records into one table using records from another table. My question is that now i need to create another table by using records from 3 other tables (tables are related). Can i use aliases on the column names, like on Oracle SqlPlus? How will be the syntax of the 'INSERT INTO SQL statement?
Dim MyConn As ADODB.Connection
Dim MyRecSet As ADODB.Recordset
Dim tmpSQL As String
MyConn = New ADODB.Connection
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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
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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()
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I am trying to update a link table with values from multiple datagrids, the field types in the link table are numbers and the value selected from the datagrids are also numbers.
I am getting the following error:
The OleDbParameterCollection only accepts non-null OleDbParameter type objects, not String objects.
In line : cmdCompany.Parameters.Add("@COMPANY_ID")
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I do this in Oracle databases just in a snap, but now I have to do it in VB using ADODB and I don't know how to do it.
I have two Access 2007 tables. Table A contains: Col1 (text), Col2 (text), Col3(date), Col4(amount), Col5(text)
Table B contains Col1(date), Col2(amount) What I need to do is to insert into table B the records of table A (col4 summed) grouped by date of table A. The date is a variable contained in a text box so it cannot be hardcoded into the SQL statement.
I have ALWAYS used the SQLDataSource to update my records in my SQL Server 2005 database, so i am not really sure how this would be done in normal code. I am using VB.NET but if you are a C# developer and want to show me some code that is more than welcome as well.
I am using ASP.NET 3.5.My user will see a page with 5 Text boxes with their contact details in. Those details I will get from a SQL Server DB and when they go and change the text in the text box and click submit, it must then save the changes.
This is very easy with the SQLDataSource but how can i code this myself?
I am getting the attached error while updating or deleting the records. [code]...
View 9 RepliesI am trying to update a databse using a grid control, I've enetered multiple rows in the row and tried to save the data, unfortunately I'm only saving the last row entered, is there a way to save all the rows entered using this approach?
Dim ConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|aop29.mdb"
Dim objConnection As New OleDb.OleDbConnection(ConnectionString)
Dim sql As String = "Select * from Customer"
Dim daaop5 As New OleDb.OleDbDataAdapter(sql, objConnection)
Dim ds As New DataSet()
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I am trying to update a databse using a grid control, I've entered multiple rows in the row and tried to save the data, unfortunately I'm only saving the last row entered, is there a way to save all the rows entered using this approach?
Code:
Dim ConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=/DataDirectory/aop29.mdb" Dim objConnection As New
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i have made a database windows forms application, i can add records, when i add a record , fill out a few fields then save it saves OK but if i then change some fields data then try to re-save i get a error: object reference not set to an instance of an object.
the code that is highlighted is:
Private Function GetRowData(ByVal custRow As calllogDataSet.CALLLOGRow,
ByVal RowVersion As Data.DataRowVersion) As String
Dim rowData As String = ""
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All i'm tring to do is connect to my MysQL database on my Local host and update a record in my "customers" Table. The Error i've been getting is under Public Sub DeactivateAccount,the MyCommand.ExecuteNonQuery() line of the code. The error is saying there is "no database selected". Below is the code i have.
Imports MySql.Data.MySqlClient
Public Class FinalFailedPinNumberAttempt
Dim connectionstring As String = "Server=localhost;user id=root;Password=;
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I want to use a progressbar to show that I'm retrieving the records from the database so that the user wont be confuse if the program is still running or not. Here's my code.
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
cs = "Initial Catalog = KRADB; Data Source = .; User id = lab; Password = 'clrscr2010'"
sqlcon = New SqlConnection(cs)
sqlcon.Open()
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in my windows application i am retrieving the recently modified data from warehouse database server using static ip suppose two columns empno,designation from emp table in this i am retrieving the recently designation modified employees and in my local server database also i have emp table with all employee details which are in warehouse database now i have the designation modified emp details using this i want to update that designation details in the local emp table to that related employees only not all employees designation actually the records may be more than lakhs records some times i have to update 100 record some times thousands records if i am using loop it takes more time?
View 3 RepliesI was trying to edit and update an existing record in my database. I am getting an error, my code is here:
Editing Records
Private Sub btnEdit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEdit.Click
Dim qry As String
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I know that when I add a record to a table through a binding source using a binding navigator - it completely handles the IDENTITY PK (it's bound to a textbox and you can see it immediately).
Now I'm trying to do this differently in another part of the program - here I only have a BINDING SOURCE - that's bound to a DATAGRIDVIEW.
I put a new record into the DGV like this
Private Sub vendorfilesDGV_DragDrop(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles vendorfilesDGV.DragDrop
If e.Data.GetDataPresent(DataFormats.FileDrop) Then
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The database:
"ID (Primary key)" | "Title"
0 | "title1"
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OK, before adding values to database, we should check if a row exists with this values :)TO do this, creating a Stored Procedure is a best way to deal with the database fastly.So... The problem now is, at the runtime, Miss OleDB throw this error:Microsoft Jet database engine cannot find the input table or query 'IF
i should say hi experts :D . Help me with this pretty code :)
The database:
"ID (Primary key)" | "Title"
0 | "title1"
[code].....
OK, before adding values to database, we should check if a row exists with this values :)TO do this, creating a Stored Procedure is a best way to deal with the database fastly.So... The problem now is, at the runtime, Miss OleDB throw this error:Microsoft Jet database engine cannot find the input table or query 'IF
how to seek a record in access (.accdb) file and update.
i have posted a question in below thread how to work with (i mean connect to a access database)....
[URL]
I could able to navigate through records but, i want to seek a particular record and update accordingly.....
when i used find method i am getting an error as below
"Table doesn't have a primary key."
But my database has a primary key.