I have been working on a simple delete and update thrugh the TableAdapter in Express 2010 and can't get it to update after a delete query. The same TableAdapter works fine when I do an 'Add', but not after the delete. What am I missing? I could use the SQL commands, but would like to use the software commands instead. Here is the delete code:
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want to delete data from the database where the value of userID field is equal to the value inside txtUserID.Text. I have a problem about my query statement.
View 5 RepliesI want to know how to Update / delete the table records in ASPNETDB.MDF in single update / delete query ?
View 1 RepliesI'm just using the default SQL Server Express in my vb 2008 express edition as my database server for my database operation. When I tried to update the records on my table I got a runtime error which indicates the error on this line 'myCommand.ExecuteNonQuery()'and it highlights a yellow background on it. The runtime error says "SqlException was unhandled: An expression of non-boolean type specified in a context where a condition is expected, near 'Number'. ".
Imports System.Data.SqlClient
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim myConnection As New SqlConnection
Dim myCommand As New SqlCommand
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I reproduced the following code to update a database and I get the error" Operation must use a updateable query"
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I am looking for general coding for performing the various functions such as elete/add/update the table in the database.
View 3 RepliesI am trying to re write a VB6 program using MS Access, many years ago, using VB 2010 express and SQL server 2008 R2 Express. I have a database with several tables, which I created using the designer. I am able to connect to the database and select data and display it in textboxes etc in vb code. What I have not been able to in code is to INSERT rows DELETE rows or UPDATE any data in the tables. I can do any of these operations using the Query Designer, but I want to do it in code. I can post some code if necessiary, but I thought it might just be some property that I had not set in the designer.
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My question is How can i create insert,update,delete query by using class file and store procedure. This query is use for 3 tier.
View 2 RepliesIs it possible to create a Message Box to delete folders in VB 2010 Express?This is what I have-If MessageBox.Show("Do you want to delete this folder ?", "Enter Title", MessageBoxButtons.YesNo) = DialogResult.Yes Then End If ,modify, delete or add code so that it is possible to delete a certain specified folder?
View 4 RepliesHere is the code snippet
objCommand.CommandText = "UPDATE tblCustomers SET weight= @weight, height= @height WHERE id=@id "
What i want to do is the following:
I have a form and i want,by clicking the appropriate button, to update the height and weight values which have the specified primary key 'id'.
The primary key 'id' is of type IDENTITY.The problem is that the above code does not work. It says Must declare the scalar variable "@id".
I have a datagridview and i want it to display the results from a query. How would i go about doing this. Here is my code so far:
Dim searchStr As String = S_date_menuItem.Text.Remove(0, S_date_menuItem.Text.IndexOf("'") + 1)
searchStr = searchStr.TrimEnd("'")
adapter = New OleDb.OleDbDataAdapter("select * from account where Date= @Date", acctconstr)
adapter.SelectCommand.Parameters.AddWithValue("@Date", searchStr)
that is my query but i don't know how to get my datagrid to display the results.
When I try to add an Update query, then open the Query Builder, I get an error saying: Error in table name or view name in UPDATE clause. Unable to parse query text. The only code that is in the Query Builder is UPDATE How would I fix this? If this is needed, the table name is Authentication, column names are AuthKeys, and Available.
View 2 Repliesi have this code that should update my data base but i kep gething an error saying: its not possible so change or delete the regists Because the table 'MembrosCompasso' has relating records
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I am trying to make a user account SQL database work with Visual Basic 2008 Express for login purposes, i.e. usernames & passwords. Plan is to host this server so people can login to use the the application and verify they have a valid account. I would like to host all the account information in SQL due to the possiblity of hundreds of users at any given time. I also need the ability to add data to the database for users registering for the first time. The SQL server will need to be able to access the SQL Server databases remote via WAN.
View 3 RepliesHow to use this query to update record [code]....
View 1 Replies[code]The query executes fine but the problem is that when this query executes, it doesn't update the percentage field. What might be the problem?
View 2 RepliesI tried to start using VB 2010 Express with a program I originally developed with VB 2005 Express that I moved to VB 2008 Express successfully a couple years ago. It uses a database file (*.mdf) that is on the computer ( not out on a server). When attempt to run the program in debug mode, I get the following error "An attempt to attach an auto-named database for file C:Documents and SettingsTomMy DocumentsQuizzing StuffQuestion Database 2010QuizQuest ionGameQuizQuestionGameinReleaseQuizQuestionDB.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share."
I first made a copy of the entire project folder that was working in VB 2008 Express and gave it a different name. In VB2010 I opened the project in the copied folder and it said it successfully converted the project. I am able to open the Data Source inthe Designer and see the database structure as I expect. I think the project is still using SQL Server 2005 Express (because it is what is checked in the list of prerequisites on the Publish tab).
Note, I have programmed off and on for many years, but fairly new to using databases and SQL Server.
Here is the scoop: I am trying to make a user account SQL database work with Visual Basic 2008 Express for login purposes, i.e. usernames & passwords. Plan is to host this server so people can login to use the the application and verify they have a valid account. I would like to host all the account information in SQL due to the possiblity of hundreds of users at any given time. I also need the ability to add data to the database for users registering for the first time. The SQL server will need to be able to access the SQL Server databases remote via WAN.
View 1 RepliesIs VB Express 2010 slower to compile and run that older versions of VB Express? I've installed it this weekend and it seems a little sluggish on my quad core computer with 1 gig of RAM. I have VB Express 2005 installed for my students at school and it seems to fly just fine. Those school computers are older P4s with 512k of RAM.
View 7 RepliesI'm using the following update method.. I'd like to be able to update the value of a checkbox into the existing query if possible. how to do this the correct way?
Public Shared Function SaveMemo() As String
Dim sConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Documents and Settingsdiw07My DocumentsDaily Backupsphone memo backend.mdb"
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Initially my app worked with excel fine, now it causes my computer to reboot only after Excel has been opened (two or more times). I have opened and closed Excel files 20+ times without running thru either of my apps (they all uses identical code for excel) and it has never caused a reboot or a crash.
run either of my apps and have the app control excel has become a crap shoot, it will reboot my computer. Adding to that I then have to do a manual shutdown because the reboot process after is unstable. (System doesn't respond properly). My code in this app is small, should make for a good example. I can provide the entire project to anyone who would volunteer to test it. (First I need to know how to send the project).
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there Dream in Code Community! Im an okay programmer as far as skill right now I am still learning as we all are I need some help from some experienced VB.NET programmers in the community, Here is the scoop: I am trying to make a user account SQL database work with Visual Basic 2008 Express for login purposes, i.e. usernames & passwords.
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I have a program which I am converting from VB6 to VB2010 this is also my first venture into sql. I have read many of the examples to try to get to grips with deleting records including those in this forum by imcilhinney
My problem is that I want to delete all but one of the records when the user presses a button, everything goes well until the 'ExecuteNonQuery' is reached.
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I'm trying to delete a number of records in a table from the last and forward. My idea is to use sql like this: delete top " & variable & " * from table where ID = something It gives me a general sytax error. Is it at all possible? Fuga. Edit: I also have the order by statement there. I just forgot to put it in the question.
View 5 RepliesPrivate Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If Master.Text = "8888" Then
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i dont know whats rong in this , it says syntax error at * if i delete star then query runs but database still contains the row. FYI its code for desktop application using vs2008
I encountered something like a logical error which I could hardly resolve since I'm new to this technology. I'm using visual basic 2008 express edition with its built-in linq-to-sql technology. I was able to retrieve, add, edit, and delete such record using the linq-to-sql method, but one thing.I could not get is something like relational database operation. Here is my problem. As you can see the table above which represents the records on my database. You can notice there some account numbers that were duplicated which I used as the primary key or identifier. What I want is when I'd like to query such account number it should display all the records that have the same account numbers on it. Say for example, if I query the account number 00003. It should only pull up and display three records with the name Maverick and their corresponding address, movie rented and date.What is happening in my end is when I query such account number which are being duplicated in the database I encountered two things, its either it would display all the records in the database with different account numbers associated or it gives me an error message if I change my code from 'For Each memrec In db.Table3s' to 'For Each memrec In retrn' statement.What I've been trying to do here is if you enter the account number on the search box, it should only display the records on the combo box associated with the account number being entered. Like if you enter 00003 on the search box, it should only display the three movies rented by Maverick no more no less on the combo box. [code]
I have already tried that set of codes before but it's working the same thing. I tried many times modifying my codes before I posted my comment in this forum thinking that i can resolve it on my own but I wasn't able to. That code won't still filter the records in the database. I would like to verify that the table above is only representation but the real column on the table on my database is 'Account#' not Account Number and visual basic would detect the code as 'Account_'. May i know why Movies_Rented column on my table is not a member of string? Why is it the code you gave would still display all the records on the combo box? this is what im not getting. hope you can still find the solution to this issue.
I have a database, added in data sources. I can manage records with automatically generated database toolbar.I want buttons for Add, Replace, Erase data from Database. So far i've seen some Tutorials but they are most likely for VB6 and also i'm really new on VB at all.
So i've uploaded all my project folder and my access database for you to rewiev it.Also excuse me for my englsih. It's not my native language. And again i'm new on VB, so i can ask dumm questions about basic. I can use some qualty VB 2008 tutorials links too.
I'm using visual basic 2008 express edition and I'm not sure how to attach my query in order for it to run? I've been using trying to use visual basic to create a form which retrieves data from a Microsoft access database and filters the data to find the record starting with the letter retrieved from the user. When it is run without the query the data grid shows all the records. However when my original query is put in the application changes it and the value shown is null in all fields.
This is what i had before:
SELECT Allergies, Breakfast, Lunch, Supper, FirstName, LastName, MealDate, StudentId
FROM [Student Checklist]
WHERE (LastName LIKE @LastName + '%')
This is what was returned:
SELECT Allergies, Breakfast, Lunch, Supper, FirstName, LastName, MealDate, StudentId
FROM [Student Checklist]
WHERE (LastName LIKE '@LastName' + '%')
I am working on project. i am using vb.net and sql server 2005. in my project i have a form which records student details. so if i want to update the record of an existing student, i delete the record and insert a new record to the table with the same identity column value using IDENTITY_INSERT. is this ok if i do it like this.
View 7 Repliesim having a bit of trouble with the delete and add record for my database. [code]The error im getting is Update requires a valid UpdateCommand when passed DataRow collection with modified rows.
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