i having trouble in linking a database which contains name ,address, etc and most importantly the signature for each individual to vb.i know that microsoft access is used in linking those database to vb, but couldnt get the signature part to be done.
View 1 RepliesI'm planning on using the Smart Device Framework 2.3 to use the signature control panel in a Windows Mobile 5 application using the compact framework 3.5.
The control has the option to save the signature as either a byte array of points, or as a bitmap. Now seeing as I want to store the signature in a sql compact database, I guess the byte array is going to be better. The trouble is, I'm not sure how to render that in a full WinForms application after I've transferred it back to the desktop.
I need to show the signature on a report, so it would need to be an image I could link/embed into the report.
I am trying to make a anti virus program, I know that any antivirus should have a file contains a database of virus signatures. How to build a database in VB.Net? I'm not asking about the way to create the database. What I want to know is how to write the virus signatures in the database? What actually a virus signature is? Is it strings used in a virus or what?
View 1 Replieshow can i capture a signature from an Electronic Signature Pad and store it in database. is there any particular api or it can be captured just like capturing an image from a WebCam. Is it manufacturer specific?
View 2 RepliesI was trying to use a GetAsyncKeyState code but each time I run the program an error occers where
[Code]....
'A call to PInvoke function 'WindowsApplication1!WindowsApplication1.Form1::GetAsyncKeyState' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature.' The full code is in timer with (1) time interval
[Code]...
I got 3 tables in database namely A,B,C. how am i going to link the column a in A and column b in B to table C so that table C can have both my data a and b?
View 3 RepliesI'm creating a system (for a project) that is based on a vet.I want to create a combo box that has a list of different animals (e.g. Dog or Cat etc.)and when an animal is selected,a group box, with loads of checkboxes inside appears. Then the user can tick a check box (a vaccine to be given to the animal) and the record is saved to a database.I have hard coded this to work, but I want a more sophisticated code set, that links to SQL so that when a new vaccine is to be added, I would only need to add it in a table, in the database. I don't know where to start for this could any one give me a nudge in the right direction?
View 2 RepliesI have a database (sql server) where i store activity information example (activityid,id,summary,signs etc.) I can successfully save this information to the database. what I also want to achieve is to add this information to a listbox so that it can be displayed in the corresponding textboxes at runtime for an encounterid.
View 6 RepliesHow do I go about linking a picture to a database? I'm using VB 2008 Express and SQL Express.I want the user to click a button when editing a recipe; the button click will then open some kind of dialog where the path to a picture will be selected. Then a button on the dialog will be clicked by the user and the picture will be saved to a folder in My Documents called "My Recipes" at the same time the recipe will be renamed using the Title and ID of the record being edited ending up with a name like "Nick's Milktart 237.png" (preferably with a space between "Milktart" and "237"). Also at the same time a link to the database must be created to a field called "Picture".I have never tried linking pictures before, I understand the app. will respond much faster this way as to imbedding the picture into the database.
View 10 RepliesHaving found the following post on datareaders Topic Posted On DaniWeb i have managed to successfully create a datareader in a class that updates a listbox on the calling form with entries retrieved from a SQL server database.I was wondering if it is possible to achieve the same thing using a dataset?My ultimate aim is to read a SQL table / view of information (ie customers), add this into a list box so that when i click on a specifc line in the list box i can then use that selected entry to do something further (ie click a line and then an edit button to edit that records details)[code]
View 3 RepliesI want to connect to a database Ive created using Microsoft Access 2007. Im using Visual Basic 2005. I also want to be able to perform basic tasks such as searching.
View 1 RepliesA friend at work is trying to write a piece of database software for an HND project and when adding his database file, he gets the below error message. I'm too much of a greenhorn to know what it means, can anyone make sense of it?
View 1 RepliesI'm trying to link a datatable from one access db to another access db but i get this error:
Arguments are of the wrong type, are out of acceptable range, or are in conflict with one another.[code]...
I have already linked the file into the form, but can't figure out the code to write for buttons to beable to view the first record in the database in the file that i linked. I need to make buttons to find the first record, last record, previous and next record. Then I also need to code buttons to add, change, and delete records.
View 4 Repliesi had created a form with datagrid view , in that a table is linked with MS Access database , i need the coding steps in vb.net
View 2 RepliesThe Calendar control (the Month Calendar) control in VB 2008. I am creating an attendance timesheet and I want the Calendar to color each date differently like e.g An employee Paul is selected from a list.
On the calendar I select the month. (The dates are not supposed to be selectable). Then lets say it is June. He is late on the 1st and the Second, so those days are supposed to be colored red (the whole block). Let's also say he is absent on the fourth and so I want that date to be coloured black. How do I do this? I tried finding a query and my friend told me that this functionality is not available in the current control and that I was best off making my own control (???).
I have tried selecting specific dates and bolding them (there is a function that allows this) but I am stumped trying to find two different ways to differentiate colours. Second:- How do I link a calendar with an Access Database?
After trawling around the net for a good few days, i decided to post something here.
Basically, i've got a problem linking a data source (Access 2007 database) to a VB 2008 project.
I've broken it down to having a problem dragging a table onto my form, when it generates the nav bar, it says "0 of {0}", and the table is empty (despite the actual database containing values)
However, this happens only at home, at college it works totally fine. The only difference that's obvious is that i'm using Windows 7 at home, and Windows XP at college.
I am working on a project that requires us to create a bracket type tournament and I am now stuck. I linked my access database to my project, and have 32 labels (lbl1-lbl32) and I cannot figure out how to integrate the labels to read from my database. It can be random or not, I just cannot get the labels to display the names of the fighters.
After the labels are integrated, the next coloum of the bracket has a link that opens a new window with each of the fighters match results, does the link have to include anything particular to display the attributes from the database?
I want to move my programs and the database to another computer and hard-disks. It looks to me as though I nearly have to re-create the controls and rewrite some of the code to make it so the programs still work after the move. At least with ODBC all I would change was the DSN definitions external to the programs. Is there an easy way to move or rename a database without loads of work?
View 3 RepliesI am trying to copy a table from a network database to a local database. I used DAO and could check if the network table existed using a function that tried to assign a TableDef object to the table in question. If there was no error then I assumed that the table existed and the function returned true...Or it would error out and return false.I could then proceed with the copy or not as the case may be.I am converting the code to ADO.net and need to know how to check for a table. [code]
View 1 RepliesRecently working in vb 2010 express. I'm using service-based database which is based on SQL Server. This database will be deployed at the server. Is it possible that multiple vb.net programs, which are installed in remote computers or client computers in the same network, connect to this database simultaneously? Does the service-based database support multiple connections?
View 1 RepliesI need to programmatically add a row to a MS Database.How is this done?
View 2 RepliesI don't actually know if I can use any XML file as a database that I can edit and make some changes to it using vb.net 2008 and save them. Because I'm working aboard a war ship and we have a central automatic system to control all the internal communication using standard telephones. to reprogram the extinctions we used to have a MS DOS program and it's so old and now it's totally lost and not found and after a long searching I have found a file that could maintain the extensions and reprogram the system but it's an XML file.
[Code]...
I'm using Visual Basic 2008 Express Edition. What I have is an Access database that will have several tables. What I want to do is connect to the database, enter the name of a table in a text box and query that table. The code that I have now is: [Code] I'm not sure how to modify this code so that tablename = whatever I type in the text box.
View 5 RepliesI am using SQL server managment express. I have 4 databases in it and got a bug on my computer which I could not get rid of. I saved these to disk and reinstalled windows, I reinstalled SQL server and I am now trying to add my 4 databases. Can any one help me with this, I can add a new database but not an existing.
View 2 RepliesI have working on a project to add details to a database. I'm having trouble with the connection string, the code is as follows:
Code:
Public Function AddContactToDatabase(ByVal sFirstName As String, ByVal sLastName As String, ByVal sAddress1 As String, ByVal sAddress2 As String, ByVal sAddress3 As String, ByVal sAddress4 As String, ByVal dDOB As Date, ByVal sPhone As String)
[Code]......
[Code]....
Thought I should probably say im using Windows 7 and the 2010 beta Visual studio
Using VB 2008 Express /Using SQL Server Express/Database name is "StopData"/Computer name is "LAPTOP"?Here's what I have.
Code:
Imports System.Data.SqlClient
Public Class frmMain
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code].....
I have a database app that I wrote in VB6 a while back that uses Access as the backend. I have installed the app on Windows 7 pc's and all works fine....most of the time.On some pc's I see an issue where if I replace, rename, or even remove the DB, my app (b/c of something to do with Windows 7) still sees and reads the information from the old DB. It seems no matter what I do, I cannot "remove" the .mdb file from the system. As one can imagine, this is making it very hard to replace the outdated db with an updated version. I never experienced anything like this running the app in the XP environment.
View 3 Repliesbelow is the coding i want to ask :[code...]
this code is used for login by querying into the database....the logic is like this..it query accoding to the username text box and pass word text box...if there is indeed such rows in the table, then the bacadata.read, else something else happens...i have a few question :
1.is this the right way of login in by checking the row is available or not?
2.is there any enlightment and solution for the appropriate way to login system by using database other than the one teached by my lecturer?