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error is same in my all projects lols : " null reference exception was unhandled " my database tabase is an empty table you want to fill on the fly and it has empty table n does have columns defined, but no values
I don't know if I can have several same forms to do the manager jobs, ACTUALLY THE STORE VALUES ARE DIFFERENT(those forms can have the independant data values to store into the forms), like if I can have the datagridviews to store the different values? SO,MY QUESTION IS if I can have several same forms(FROM ONE SAME FORM), and can store different data values into the forms with vb.net & access, OR I HAVE TO CREATE SEVERAL SAME FORMS.
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I am using an Access database and vb.net 2010. I have created a table in the database with columns for title, datein, dateout and roomnymber. In vb.net 2010 I made a distinguished title = combobox, datein and dateout = DateTimePicker. When I click on F5, an error occurs: INSERT INTO Syntax Error in statement. Here's my code:
Dim sql As String
sql = "INSERT INTO tcekin(title,firstname,lastname,address,country,company,roomnumber,datein,dateout,rommtype,note)" & "VALUES('" & ComboBox1.Text & _
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I am a VB.net beginner. I am doing simple program that has database connection with access 2007 and i want to store the data (whatever i enter in the textbox) to the database.I did the connection as per the instruction in the msdn(i.e;datasource/database/ms access/selecting accdb file/draging and dropping the fields of the table to the form from the datasource window)I want the code to store data from vb 2008 to access 2007.
View 7 RepliesDear reader i have one problem,that is how to store the images in access data base from by using web cam ?
View 1 RepliesIf you have to store and retrieve data from a database is a string not the most effcient way? What is best?
How does this work in a real world scenario.
For example: I have a customer ie first name and last name and the CustomerID is autoincremented when initially added to the database. Now, the user could lookup and find the customer by their ID but we all know that's not practical. They don't know 231223 is John Adams, they know John Adams or Adams John.
So how do you handle this? Access is the database I am using but I think this would apply to any database.
I am trying to store data to access by VB 2008 express. basically, I have 13 check boxes to let the users to choose. when they finish checking the boxes, they will click the button "submit" to submit it. VB will store this as a new row in the database.
However, my insertcommand is shown as invalid. so I need your help to figure out my errors. I put the codes in my reply below to be clear.
I am following some examples I have found in earlier discussions, but have run into a problem trying to save the data. I have included my code below, and everytime I reach the ExecuteNonQuery() command it generates a syntax error in the Insert command error.[code]...
View 7 RepliesI want to capture images and store it in access data base in vb.net 2005
View 4 RepliesI am new here and really excited to see the huge resources on this forum for vb.net. I have just started my learning of vb8 and need to create some basic applications for my personal use.I need to develop an application that can extract data from a html table and store that data into Access database. I have learned to create web browser on Visual Studio 2008. Below is the link from which I need to extract data and store into a database
View 3 RepliesI have created a data source connection to an access db by using the wizard in vs2008. I have then used this as a data source for crystal reports. My user would like to put the database on a network and reference it there. Is there a way to set a new path for this data source during runtime?
View 4 RepliesI have created multiple dropdown list at runtime and populated with data. I also have added an eventhandler to determine the selected value of the drop down list.
The code is as follows :
Dim tbl As New Table()
tbl.EnableViewState = "true"
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I am making a video conversion tool. I have a listview with one item per file.And i also have options to add subtitles to movies. I want it to be like this:Say the user add 2 movies. He select the first movie in the listview and then go to the subtitle tab beside. There he checks a checkbox so he can add subtitles. Some controls comes up that allows he to browse for subtitle and select which language the subtitle is. Then when he has selected these options, he select the other movie, the program saves the subtitle data somewhere and then erases all fields so he can fill them with a subtitle for the other movie.
My.Settings is way to simple for this. But i don't want SQL or db related stuff.Is there a good storing way i have missed?
I am working on my real time project where the configuration details will be given on runtime. Based on the configuration details, the next form will be loaded and the data will be exported to the database and spreadsheets from the pop3 server. I have done the extraction work from pop3 server. Now i want to store the configuration details that are provided in the controls present in the form. I am new to visual basic 2005 and it has the .Net 2.0 Framework. I do want to create the text file as notepad and and i want to save it runtime with the details. I am in hope that you people will me.
View 2 RepliesI am coding a program that will allow the user to input 5 payrolls for Store 1, Store 2, and Store 3. The total of the 5 payrolls are then added together and shown in the respective Store's labels. A total label is also there to add up all the totals into one number. The numbers in the label must be in currency form. My problem is the numbers don't add correctly when I hit calculate. The first two numbers add together, but then after that the number just seems to subtract a random amount.
So far I have this --
Public Class Form1
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Me.Close()
End Sub
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My application is built to scan MS Access database in vb.net 2005. MS Access DB is opening when Access Run-Time (But no Full version of MS Access) is installed in the system as well. But showing error while scanning through our Tool.Need only Full version of MS Access.To Identify, whether the required application (like here we need MS Access Full version) is installed or not at the time of installing our Tool(Through MSI).Is it possible to identify MS Access Full version with Run-Time while installing the Tool?
View 1 RepliesI have a VB.Net app that uses an MS Access 2003 Database. In my connection string, I'm utilizing the "|DATADIRECTORY|" construct (see code). cnn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DATADIRECTORY|MyDB.mdb;User Id=;Password=;"When I run my program, I'm getting the following error message:"Could not find file 'C:indebugMyDB.mdb'"
In order to use the "|DATADIRECTORY|", where do I need to put it within my Project. I basically want to deploy this app on stand-alone PC's. I guess a more simpler question would be: How do I deploy a single user application that uses an Access Database where the database location will go wherever the user specifies when installing the application?
I am new to VB.net. I want to read and input file and store that data to an SQL Server database. Do you have an sample code that do such?
View 1 RepliesI have a modbus TCP device that I have managed to connected to through my VB source code.
I want to poll (continueously read) data from certain registers of the device, and store the polled data in a file (text,csv, excel).
I have an application that uses Dataset.WriteXML to create a small backup before data is syncronized to a data store (less than a meg).This application has worked well for 5 years now, and all of a sudden with the installation of XML 6.0 SP2 the XML document is not working correctly.I have multiple tables within a Dataset (Company, Contact, Notes, etc...)When WriteXML is called, the first table should be Company, however, the first table is being named Contact with the Company Data in it. The Notes table is being called Contact and so forth. In other words it's not giving the correct names to the tables in the XML File.This appears to be a bug, which is causing great distress on all the companies who have been using this program.
View 3 Replieshow to store and retrieve image in ms access using vb.net coding
View 3 RepliesSo I know it's possible to store Users and Roles on SQL server but I was wondering if it was also possible to store the access rules on SQL Server. I've searched but I can't find anything.
Our auditor requires us to run reports that tell us which users have access to which websites. Currently I am parsing each web.config file to see which users/roles have access, storing that in SQL server and running a report off of that but I am hoping there is a better way.
I am building an application with an Access database, using Visual Basic 2010 and am not sure where the best place to store that database is. I am looking forward to creating an install file and want to make sure that the database is in the right place.
View 1 Repliesi just want to know how to get a template and store it in a data base without using data set
View 1 RepliesThe following is the code i used to get the value from textbox to listbox and store all the listbox values to the access database at the runtime.In the database, i have only one field called num which is been set as a multivalue field using the lookupwizard. But actually what happens is ,no error is occurred,but the value is not updated in the batabase.
vb.net
Imports System.Data.OleDb
Public Class Form1
Dim conn As OleDbConnection[code]...
how to store a hash in my Access Database. Now I have generated a hash by salting a user password with the User ID (not highly secure I know, but plenty for my purposes). I have also stored the hashed values in the database as Base64 strings (manually, I haven't yet developed the module to do that automatically), however, when I go to retrieve the hash from the database I receive the hex code in place of the string. This is the code for the login button:
Sub prcLogin()
'Log User in
Dim ds As New DataSet
Dim blnCorrect As Boolean
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But when I run this instead of returning a value like "rlzhYoiO4+vpdJdsrFq5Sj9VBJ+FFYhIg9V5+z+jeNI=" which I stored in the database, it returns a value like "5C6BED0D94
I need information about store procedure in SQL and how can i access textbox values into store procedure. and connection string for remote server (sql server 2005 installed on server)
View 1 RepliesThere is an OLE object column that contains images in my access database. I'm trying to create a program that reads the images from that ole column and store the images to a file. Currently, I have a program that creates an image file but the image is blank.[code]
View 2 RepliesBasically i am trying to create a programme, which needs to have some authorisation.
When the application starts up, it starts straight into the login screen.
I want the Username and Password textboxes to read the database and if they match then progress to the next form but if they dont match then a message box will appear.
I also want to create groups of people so if a certain group of people log in they go to a certain form and if the another group of people log in i want them to go to a different form.
Also i want the password box to be * instead of visable text.
dbProvider = "PROVIDER=Microsoft.Jet.OLEDB.4.0;"
dbSource = "Data Source = D:/Users.mdb"
con.ConnectionString = dbProvider & dbSource
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how to store & retrieve images from d access database using vb.net 2008
View 2 Replies