VS 2010 Check If Primary Key Is Already In Use?
Sep 12, 2010Here is my problem:
For example, I have 4 existing records
UserNo - UserName - Password
1 - ABC - 1234
[code].....
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How To Check If Primary Key Exists In Access DB
Feb 21, 2011I want to check in an Access Database if a primary key exists using VB.Net & OleDb:
By primary key name
By number of fields as primary keys
LinqToSql Contains On Multi-column Primary Key From In-memory List Containing Primary Keys
Aug 23, 2011On a client i have an anonymous list containing a multi-column primary key previously selected from the DB.Then i need to select all the records from the DB that equals the primary key list i have stored in the memory.[code]
View 1 RepliesImport Row From TABLE1 To TABLE2 Without Primary Keyfield Or Adding Correct Value To Primary Key
Mar 2, 2012How i can import row from TABLE1 to TABLE2 without primary keyfield or adding correct value to primary key
i tried with two different codes, but result is same, it says: "In the column "Key"a constraint on the uniqueness.[code]...
.Net 2010 To Access 2010 DataSet Primary Key?
Jan 17, 2011I am using Access 2010 and VB in VS2010.I have created a DB and have several tables. 1 table in particular called Employers, has the normal AutoNumber Primary key. Everything in Access runs fine. I used Access to develop a basic model application of the full version I am developing in VS.My VB front end contains a dataset linked to the employers table. I have dragged onto my form the "detail" view of this DataSet, not the DataGridView. The usual controls are in place such as the EmployerBindingSource, EmployerTableAdapter, TableAdapterManager and a EmployerBindingSourceBindingNavigator.On my VB form Scrolling through the record set is fine and all works well.My problem is after I click the "Add" record button on the EmployerBindingSourceBindingNavigator. The form fields go blank as expected awaiting user input. However, the field that is bound to the employer_id field (the Employer table's primary key) shows a value of -1.The insert command works no problem, and having looked at the database the table contains the new record with a correctly incremented PK
[Code]...
VS 2010 Primary Key & Related Tables
May 20, 2011Is there a way to modify the text of a primary key and not have it delete all the following rows in other tables related to it?
View 6 RepliesWhy Is Data Table In 2010 And SQL Server Starting With A Negative Primary Key
May 26, 2011I defined a database using SQL Server 2008 R2 Express, and connected to it using Visual Basic 2010 Express. For some reason though, when I use the database in the program, it wants to start off using a negative primary key.Is there any way to make the primary key only a positive number?
View 3 RepliesVS 2010 Basic Timer Animation - Error Check And Colour Scheme VB Express 2010
Mar 26, 2012this is my very first posting and I must say I am desperate. I have a VB assignment due in 2 days and I am so lost. I have written a code to draw some graphic, just a basic house, tree, sun etc. I have also written a code to magnify said graphics which were all the specifications of my Assignment 1 part A. Now for Part B I am being asked to extend my program so that: A - My graphic can be drawn using different colour schemes designed by me but chosen by the user B - My graphic or an appropriate part of it can be animated around the picture box if the user chooses to do so. C - Error checking is included.
[Code]....
VS 2010 : Check If Its The Users First Run Of App?
Jul 5, 2010how can i tell if its the users first run of the application on there machine?
View 6 RepliesVS 2010 App To Check For Updates?
Jun 17, 2010I have created a backup script which my organization uses to back up a specific set of data weekly, to a server, by clicking and running the app.I am always updating it/ improving it and instead of redistributing to the select employees there has to be a way to code in a "check for updates" type of thing.
I was wondering how to make my created app check with that server to see if i am running the latest version.
How do i incorporate a "version" in my app, or would it just be a naming convention thing? and how do i check for updates? Would a button being selected to check updates be preferable? or is there a way to auto detect it?
VS 2010 Check For Day And Month?
Jan 9, 2012I have one question. In code, I want to check if day is no. 20 and if month is 12. I have tried with
Microsoft.VisualBasic.DateAndTime.Day("20")
and
Microsoft.VisualBasic.DateAndTime.Month("12")
but it didn't worked. So can anyone tell me, what code should I use for check day and month?
VS 2010 Check For Time And Day?
Oct 22, 2011VS 2010 Check For Time And Day?
View 3 RepliesVS 2010 Check If App Has Focus?
Aug 21, 2010So, I know from the user32 dll, and I set that as focused.
Is there a easy way of determining if the app has focus?
im using send keys, and i dont want it typing the keys and such, if the app doesnt have focus.
Also, if you click off of it, etc... It's more so a pause thing...
The only other way I can think of, is setting it so,
If myapp has focus, then pause the keysends.... then if it loses focus, assume the app i want has focus again.
VS 2010 Check If File Is In Use
Mar 2, 2011I'm making a program in which a couple of txt files will be used for reading and writing (streamreader/writer). Incidentally, these txt files might be in use by another program, although never more than 1 or 2 seconds each time.
Suppose, I have the following
Dim Input As New System.IO.StreamReader("c:data.txt")
Data = Input.ReadLine
...more code...
[Code].....
This doesn't work though. When I open c:data.txt in another process and run my VB application, I still get the IOException.
VS 2010 Check If GridView Contains A Value?
Dec 28, 2010I have a DataGridView that contains a few columns of data. Is there a way to check a column for a value before i add a new row, just to make sure i dont put dupes in it?
View 2 RepliesVS 2010 How To Check If A .wav Is Playing
Jan 26, 2011I need to know how to see if a .wav file is playing.[code]And I need Label1's Text property to be "Done" when c: ecsound.wav is done playing. Anyone?
View 3 RepliesVS 2010 Sequence Check?
Jan 12, 2012i have a file with a serial number in it and i need to check if it is in sequence or not and then print a report stating no errors or if there is errors what line they are on.
[Code]...
Check If A Drive Exists Using 2010?
Oct 19, 2011How can we check if a Drive exists in the system
View 4 RepliesVS 2010 - Check For Emails That Are Already In Inbox
May 24, 2012I want to make something like microsoft outlook; an e-mail application. But how do I check for emails what are already in my inbox at hotmail?
View 1 RepliesVS 2010 - Check If Text File Contains Anything
Jan 6, 2012I would like it to check if the text file (myfile.txt) contains anything. [Code] but if I changed the myfile.txt with a value of "hello" and save it. I still get the "msgbox("myfile.txt does not contain any information")" What am I doing wrong?
View 24 RepliesVS 2010 : Check For Sql Connection Status?
Jul 25, 2011how do i check for sql connection status constantly. Timer?
View 4 RepliesVS 2010 : Check If A File Is Being Used By Another Process?
Sep 30, 2011The only logical way is reading the file and creating Try and Catch?
View 4 RepliesVS 2010 Check All Yellow Checkboxes?
Dec 10, 2010I have a piece of code for a program where when a specific checkbox is checkedunchecked (In this case "Allyellow") it checksunchecks any checkboxes within a group of 14 with a lightyellow backcolor. While the piece of code below does this fine it seems to me to be very clunky and I know it's possible to streamline it any number of ways.
Yellow Check-boxes
Private Sub Allyellow_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Allyellow.CheckedChanged
If Allyellow.Checked = True Then
[code]....
VS 2010 Check Boxes Are Grayed Out?
Apr 16, 2012I have seem some threads similar to this but none have resolved my problem thus far.I currently have a gridview that is populated from a database table. There is a check box field within this table, generated from one of the fields being of Data Type "bit". When this page is loaded, the check boxes are grayed out and I am unable to click on them to change.
[Code]...
VS 2010 Check Checkbox In Other Program?
Dec 28, 2010In Vb.net, I want to make a program which checks and unchecks a checkbox in another program with just a hotkey (X for example).
I also already downloaded spyxx to get the class.
VS 2010 Check First Rule (not Line) In RTB?
Mar 5, 2011Let's say I have a rtb with a few lines.
line1: (empty)
line2: (empty)
Line3: "blablablablabla"
Line4: ..... etc
How do I get/read the first, only the first line? ("blablablabla")
VS 2010 Check For A Certain Phrase In A Sentence?
Apr 15, 2012I want to make the program check for a certain phrase/word in a sentence. Example- User types in google, program checks if theres an extension(or whatever its called)if there isn't, it will automatically put a .com after google.
View 3 RepliesVS 2010 Check For File And Close If Not There?
Jul 7, 2010Its been requested that my project has a way to limit number of users logged in at one time. I have that figured out but there is a problem. What I have done is that when a user logins in the application creates a .usr file in a directory on the network. If the number of users (value in the database) is less than the number of .usr files another user can log in, otherwise they can not(the file gets deleted at logout or application close). Now the problem is I need to create a way that if the .usr file get deleted the application will close. Is there a way to keep a watch on file and if it gets removed close the application.
View 6 RepliesVS 2010 Check For Running Program
Sep 30, 2011I need my program to check if a program is running. The program i'm talking about is Need For Speed World. (NFSW).If the program is running then, I want Label1 to say "Running". And if not: "Not Running".
View 11 RepliesVS 2010 Check If A Number Contains Decimals?
May 29, 2010VS 2010 check if a number contains decimals?
View 6 Replies