Simple VB Syntax To Show Some Values From A Database?
May 24, 2011
Im just doing some tests to connect to a mysql database.I do not know how to call these values once I have made the sql query. How do I go about this, i.e. to show the values on the labels on a form?
Code:
Imports MySql.Data.MySqlClient
Public Class Form1
Dim ServerString As String = "Server = localhost; User Id = root; database = CALIBRA"
Dim SQLConnection As MySqlConnection = New MySqlConnection
[code]....
What do I put in the "SOMETHING MISSING HERE"?
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Jun 23, 2012
I'm new and this is my first question.I'm trying to insert a value into the database and I get the error message Incorrect syntax near ')'. and cmd.ExecuteNonQuery() gets highlighted. Here's my code:
con.Open()
cmd = New SqlCommand("INSERT INTO orders ('" + IDProduct.Text + "')", con)
cmd.ExecuteNonQuery()
con.Close()
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Feb 27, 2012
how to create a program that can access information held in an excel database and show it in a simple form.
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Jan 28, 2010
Hhow can i retrieve the database values and display it on vb.net form
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Feb 14, 2011
I'm trying to create a simple slide show using timers.I tried this but doesn't seem to work.
Code:
Dim Count As Integer
If Count = 3 Then Timer1.Enabled = False
PictureBox1.Image = My.Resources.Water_lilies
Sleep(900000)
[Code]...
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Feb 25, 2010
Basically what I am making is a form with just one button and 2 text boxes. The purpose of it is that when I click the button 2 random PRIME numbers between 100-999 will show up in the boxes. With my code I have now, the numbers that show up in the boxes aren't always Prime.
My current Code is.......
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Randomize()
Dim p, q, i, j As Integer
[Code] .....
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Oct 22, 2011
I've created simple modeless dialog box that show a progress bar, plus an ok button. It works, except that the "OK" button doesn't display until the progress bar is filled. My dialog is name frmProgress and I'm using:
CODE:
Is there a way around this?
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Aug 5, 2009
I've tried different approaches to query a simple xml and compare one of it's values but none of them worked well.
Consider the following XML structure:
<?xml version="1.0" encoding="iso-8859-1" ?>
- <Shops>
- <Shop>
<text>Northampton</text>
<value>NN</value>
<currentdate>050809</currentdate>
<labelcounter>1</labelcounter>
[Code] .....
I have the shop name in a drop down list which is ShopsDDL and it's set to autopostback. What I want to achieve is:
On postback, check for a xml node where node's text = shopDDL shopname
And retrieve also this node's currentdate and label counter.
Rhen, if the node currentday = today then increment labelcounter by 1
Else set labelcounter = 1 and currentday= today
My problem is the XML query, I can do all the logic as soon as I manage to retrieve data from the XML.
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Dec 30, 2009
i know how to declare a simple array and intialises its values, but i dont know how to get its results out of it. let me explain what i want.i've basically made like a Quiz, so the array(s) needs to hold 20 questions and 20 anwers. and i ve put these separately in each array, i.e. i have 2 arrays one with questions and the other with answers.when the user of my program presses ' get a Quiz Question', they retrive a question. Then the user types in an answer and using the submit button sends the answer for it to be verifed. how do u make sure that the question has a coressponding answer to it. as ive sed i have 2 separate arrays, i dont know how tell vb that when a particular question appears that it has a corresponding answer. If it matches a positive message appears, i.e.good otherwise wrong will appear.Also i need to randomize the way the questions appear in the quiz so they dont follow the same order when they are seen for the second time?
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Nov 4, 2009
I have a (checked) listview with values in the subitems. I am trying to make a simple sum of the checked values, but I can't seem to get it to work. The values returned aren't correct.
The idea is that each time I check or uncheck a row it re-calculates the values from subitems(2).
Here's what I was trying:
vb.net
For i = 0 to Listview1.CheckedItems.Count - 1 Label1.Text = CDec(Listview1.CheckedItems(i).Subitems(2).text) + cdec(Listview1.CheckedItems(i).Subitems(2).text)Next i
I have (text) values like 77.50, 115.60, etc.
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Dec 15, 2010
I am building VB.NET application that takes data from text files that are exported from a legacy DOS program. These are written to a datatable and displayed in a datagridview. Right now my code simply loops through the datagridview and inserts the data into the database (SQL Server). There is a requirement now that the client number must be checked before the insert to see if it exists in the database. If it does, then the value of one field (tax rate) is checked against the value of the field in the datagridview. If there is a difference, then the rate is to be updated in the database and the data that was in the database is to be written to a history table for audit purposes. If the client number is not there, then we are to do the insert (which is already written). I want to know what is the most elegant and efficient solution for this problem.
I need to compare what is in the database table with what is in the datagridview, update the history table for records that exist, and then insert new records.
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Jan 5, 2011
I am currently building a system in SQL Server 2005.
I have a table that holds information about certain insurance schemes such as overheads and other things. These values will change occasionally and currently I administer the database straight through the management Studio.
I would like to build a simple interface that will allow my colleagues to change these values by selecting the company in a dropdown and the current values will populate. They can then edit these values and submit them to the database.
Is this possible in the current Visual Studio supplied with SQL Server 2005 or do I need to get another product.
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Sep 29, 2010
I want to create program in vb2008 express with ms access database. Can somebody help me so i can learn how to program using classes hard coded. I have learned vb6 before but it has a big difference on vb2008.
I have a database named "DATABASE" in ms access 2003 and the details are: Table :
EMPLOYEE(EmpNo, EmpName), DEPARTMENT(DeptID, DeptName), CATEGORY(CategoryID, CategoryName), SUPPLIER(SupplierID, SupplierName), ITEM(ItemID, Itemname), ITEMLIST(ItemListID, ItemID, ItemDescription), INVENTORY
[CODE]...
All the CAPITALIZED name are Table and all items inside the parenthesis are fieldnames. I don't know where to start on working on this RECORDS. I was able to understand visual basic 6 a bit, and i am trying to apply the coding to VB 2008 but all i get is errors. I am hopeless now and i need help to be able to start my programs. If someone can give me a sample code, i think i would be able to trace the line of code to be able to understand it. I am currently an inventory manager on the small company i was working with and i like to organize my record by using database.
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Oct 27, 2010
I am creating an xml file with LINQ as follows...
Public Sub CreateXml()
Dim db As New MDataContext
Dim Customers = <gallery columns="3" rows="3">
[code]....
Could i mix local values with the ones returned from the LINQ query...Something like the following?
Public Sub CreateXml(ByVal **Col** As String, ByVal **Row** As String)
Dim db As New MDataContext
Dim Customers = <gallery columns="& **Col** &" rows="& **Row** &">
[code]...
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Sep 11, 2011
I have a simple GUI form to hide / show / minimize / terminate / force terminate Processes. i can do all well but for show and hide i need the MainWindowHandle to show or hide it
So here is hide process code:
Dim Proc As New Process = Process.GetProcessesById(List.SelectedRows(0).Cells(1))
Dim hwnd = Proc.MainWindowHandle
ShowWindow(hwnd,0)
If i try the same with show code:
Dim Proc As New Process = Process.GetProcessesById(List.SelectedRows(0).Cells(1))
Dim hwnd = Proc.MainWindowHandle
ShowWindow(hwnd,9)
The MainWindowHandle become 0 cuz its hidden is there is any other way to get the MainWindowHandle of Process ?
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Apr 9, 2010
I have loaded my database with one table under "Data Connections" in the "Server Explorer" pane.What is the standard / best-practices way to handle a simple query in a VB ASPX page?
My left <div> would be a set of form elements to filter rows, and when the button is clicked, the main <div> would show the columns I want for the rows returned.
Note: Answers in C# are okay too, I'll just translate.
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Oct 31, 2009
I just want to be able to click on a commandbutton, menu_item, or maybe even a wizard at program install time, to make the database from scratch.
1) I do not care what type of database it is it is as long as it will run on any pc machine without having other programs installed except the one im creating.
2) I do not want to use access or the designers to create the database either
[code]...
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May 4, 2009
How To Manage A Simple Database
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Jun 15, 2010
I try to keep it short - so far I got an app. which receive, compare and send STRINGs back and forth. Due to the fact that I am not too fit in VB, I realized it via a SELECT/CASE method. But now, I would like to allow user to add new STRINGs from the user plane as well (before it was done by myself). I can imagine, I need a database for it. Which one would do the job best? I need only two columns, where my app. can send a coulmn B string back, after it recognized a column A.
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May 27, 2010
i can't find anything's wrong but the the program keeps prompting syntax error
Code:
sql = "UPDATE tblclients WHERE Key_Contact_Person ='" & txtclientname.Text & "' SET (" & _
"[position] ='" & txtposition.Text & "'" & _
", [Deptment] ='" & txtDept.Text & "'" & _
[code].....
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Mar 25, 2012
I am having problems implementing this query in vb.net.The error message that I am getting is with the "as" in the first line.This is a local sql compact database 3.5
cmd.CommandText = "UPDATE player as a " &
"SET starter = 'TRUE' " &
"WHERE NOT EXISTS (SELECT '1' " &
[code]....
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Mar 14, 2010
I get this error, while I'm testing the code below:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '[student](ID, LASTNAME, FIRSTNAME, SCHOOL) VALUES ('333', 'aaa', 'aaa', 'aaa')' at line 1I just recycled the code that I used in manipulating ms sql database. So the syntax must be wrong. What might be the correct syntax for adding records into mysql database?Here is my current code:
idnum = TextBox1.Text
lname = TextBox2.Text
fname = TextBox3.Text
[code].....
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Aug 11, 2011
I have been working on a project for awhile now and have gotten to a point where I cannot update the database after changing it. below is a sample of my code incase anyone can see where I have gone wrong.I have declared the database connection in another part of the program.
[Code]...
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Sep 18, 2009
Need to create a form and connect the form the database on the click of a button. I have created the forms and data tables (Attached).Also want to know how can i open a form on double clicking an entry in the list box.
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Jun 11, 2011
How to do a simple log in program in netbeans using java database ?
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Dec 8, 2010
I'm trying to connect to a .MDF database (created via VS2010), but I'm having some issues.
My code is simple:
Imports System.Data.SqlClient
Partial Class MasterPage
Inherits System.Web.UI.MasterPage
[code]....
I get error on line connection.Open().
The path of my DB is App_DataVisitas.mdf
It may be my connection string.
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Jul 17, 2009
i did the following code:
[Code]...
but it does not work.... where is my mistake in the above code?
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May 7, 2012
I'm not sure why, but my database receieves a syntax error when I update it. If anyone can explain to me where I am doing something wrong, let me know! I'm not the best programmer, but I am doing my best
[Code]...
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Dec 5, 2010
I am trying to execute a command that inserts a row but I keep getting the error "Database error Syntax error in INSERT INTO statement." What am I doing incorrectly? I know for Ole Db refers to the parameters by sequence and I've done in the correct sequence. I left out the ID since it is auto generated could that be causing a problem?
[Code]...
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Nov 22, 2010
So im writing a program, basic enough, to allow a tutor to enter student marks into a database and edit them and navigate etc...on my form that displays my database information, when i click on the update button im getting a syntax error. "Syntax error in UPDATE statement." Code below :
Code:
Public Class frmDatabase
Dim iResponse As Double
Dim con As New OleDb.OleDbConnection
[CODE]...
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