Check If A Table Exists In Access File, If Not Create It?
Jan 16, 2008I wont to be able to check if a table exist, if not i wont to create it...
This is the code i use for connecting...
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Check If Record Exists In A Table?
May 23, 2012I have a tenant details form that has a field called TenantID, I also have a Lease table that also has a TenantID field, what I want to do is click the lease button, check to see if the lease already exists, if it does open the lease form to that record. If not then open the lease form to a New record so the user can enter all the information for that lease.
I am trying to use the below code but am having a little trouble understanding how it all works. What needs to be declared, what doesnt
HTML
Private Sub btnLease_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLease.Click
Dim fm2 As New LeaseDetails
[Code].....
Check If An Entry From A Textbox Exists Within A Table?
Jun 5, 2010I am looking to programme a button to check if an entry from a textbox exists within a table.
This will done via a button.
how I would code the button to make it query the table?
Check Whether A Value Exists In A Table; Show MessageBox
Oct 22, 2011I have an 'invoices' table with a column for the invoice number.
When adding a new invoice, I would like to check if it already exists. If it exists, produce a MessageBox to the user that there's already a record with this number.
I'm using Visual Basic 2010 and SQL Server 2008.
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
Check If LINQ Entity Of Unknown Type Exists In Its Respective Table
Sep 23, 2010I'm trying to check if a LINQ Entity exists in its table, but at design time I dont know what type that entity is. So I figure I'll just get the table, and try the Contains method on it. But I cant get the table in such a way that I can query it at design time.I've tried the GetTable method on the datacontext, but I dont know how to cast it to the appropriate type when using GetTable(Of). GetTable(Type) works, I just use Entity.GetType(), but then I don't know how to query the ITable thats returned.To try and cast the ITable to something useable, I created an interface(IWhatever) that could implement properties that are native to all of my entities I would encounter. [code]
View 2 RepliesSearch An Access Database Table To See If A Value Exists?
Feb 9, 2012i am trying to search a table in an access database to see if the value of a text box exists in it. I have this so far:
Dim myConnection As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & Application.LocalUserAppDataPath & "\Database" & "\Student Aid Database.mdb")
myConnection.Open()
[code].....
How To Check If A File Exists
Feb 2, 2011Have only just started trying Visual Basic after using Delphi almost ever since it first came out. How on earth do I see if a file exists? - simple terms please
View 2 RepliesIDE :: Dual Check Program(check Duplication In Form By Comparing From Access Database Table Fields)?
Apr 9, 2010Details: I want to compare these above two table1 and 2 . The unmatched records should be save in a new table .
objectives
1 Should take input the table and fields we want to match each other.
2 Then after searching or reading the record from table and selected fields save the unmatch records in a new table
Check If .dll File Exists And Load It
Nov 28, 2011What is the easiest want to check if a .dll file exists, then to load it ? ( i don't need to use modules from that dll file, i just want to run it ).
View 1 RepliesCheck If Any File Exists In A Folder?
Dec 8, 2011How do I check if any file exists in a folder.
If found I want to delete it.
I can check for a specific file:
If System.IO.File.Exists("C:Labs" & "Lab0.txt") = True Then
msgbox "Files Found"
else-------------> I want to Delete it End If
Check If File Exists In A Folder?
Feb 26, 2010Check if file exists in a folder
View 3 RepliesCheck If Remote File Exists?
Jul 21, 2009In vb.net (using vs2005), I'd like to see if www.domain.com/myfile.txt exists.
View 2 RepliesCheck To See If A Text File Exists?
Nov 21, 2011What I want my code to do is to check to see if a text file exists, and if it doesn't, it'll create one and write to it, but if it does then I want it to make the contents my label's text.
Here's my code:
Imports System.IO
Public Class Main
Private Sub Main_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
How To Check If File On Server Exists Or Not
Feb 8, 2011How can I check if a file exists on a server? Let's supposed that I want to check if "[URL]" exists. How can I do that?
I tried to do this but it does not work:
Dim fso As New FileObject
If fso.FileExists("[URL]") Then
MsgBox("exists")
Else
MsgBox("File not found")
End If
How To Check If Item Already Exists In TXT File
Mar 2, 2012The following code will save an item to file over and over again, but how do I save an item only once?
Dim w As New IO.StreamWriter("E:est.txt", True)
w.WriteLine(ListBox1.SelectedItem, True)
w.Close()
If, for example, number1 is already saved in the txt file then how do I not save it again, using something like the following?
dim exist As IO.FileAccess ("e:s.txt")
if exist.that.item.is.exist= true then
w.WriteLine(ListBox1.SelectedItem, True)
[Code] .....
I am using VS 2010.
Any Way To Check If File Exists Only Knowing Extension?
Jan 8, 2010Is there a way to find out if a file exists if you only have the file extension? I tried this but it doesn't seem to work.
If My.Computer.FileSystem.FileExists(drive.Name & "*.cde") Then
Check Directory If File Exists Then Display Name
Jun 13, 2009I have some code that loads an XML which works fine, then it checks in a certain directory for a file. Then if that file exists it displays the file name if not it dispalys "no image available"
VB
FolderBrowserDialog1.ShowDialog()
If RBFP1.Checked = True Then
TXTPath2.Text = FolderBrowserDialog1.SelectedPath
If My.Computer.FileSystem.FileExists(TXTPath2.Text & "DatabasesFuture PinballFuture Pinball.xml") Then
[Code] .....
Check If Image File Exists In A Folder?
Sep 15, 2010How can I check if an Image File exists in a Folder?I need something similar to this:If C:***My RecipesNick's Milktart 237.png Exist ThenThe code that goes here is not a problem; I will show it as soon as it works.
View 2 RepliesVS 2008 : Check If A File Exists In A Directory?
Sep 5, 2009i want to check if a file exists in the Application.StartupPath. I tried My.Computer.FileSystem.FileExists but that checks the whole computer doesn't it. ? How do i check if a file exists in a directory?
View 5 RepliesCheck If An Arabic Character Exists In A HTML File?
Aug 20, 2011Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
View 2 RepliesCheck If Save File Exists Before Attempting To Load?
Dec 22, 2011I have the login form glitch figured out, and now I'm wanting to make a system within the login form's code to check to see if the characters save file exists...
I have the save, load, and test load functions here as follows, and I want to figure out a way to make something test to see if both the character name and the password match a file and or see if they actually exist in that combination.[code]...
Check File Exists On AS400 Server Using Winform Application?
Dec 9, 2009I am working on a Windows Application where i need to check a file exists in particular library with user crediantials.
Note : .Net framework 1.1 (VS2003)
Check If A Table Is Locked In Access?
Mar 18, 2010my problem today is the following:
Setup: 10 pc's connecting to a shared hard drive on a server connecting to a certain .mdb file from access 2003
Problem: We are a 3rd party tool for a Point of sale application and when the real software makes some modifications it locks certain tables which we don't lock. My ( Might be possible solution ) is: Is there a way to check with a query or an certain object if the table is locked if yes
Error: Cannot Create A File When That File Already Exists?
Sep 5, 2011Public Class Form2 Private Sub TextBox1_Click(sender As Object, e As System.EventArgs) Handles TextBox1.Click
OpenFileDialog1.FileName = Nothing
OpenFileDialog1.ShowDialog()
If Not OpenFileDialog1.FileName = Nothing Then
TextBox1.Text = OpenFileDialog1.FileName
[Code]...
Check Access Database Table Field For Zero Value
Mar 5, 2011Is it possible to check a MS Access database table with existing entries to see if one of the fields is empty.[code]....
View 4 RepliesMoves File Into The "Temp" Folder - Cannot Create File When File Already Exists?
Nov 15, 2010Here's my code: System.IO.File.Move(Form6.OpenFileDialog1.FileName, "Temp") I'm trying to make it so that the program copies the file that you select in the OpenFileDialog and moves it into the "Temp" folder. It gives me an error saying: Cannot create file when file already exists.
View 7 RepliesUnable To Check If The File "thisfile.exe" Exists?
Aug 27, 2009i wanna be able to check if the file "thisfile.exe" exists, and if it does then delete all the other *.exe files it finds but not deleting the "thisfile.exe", how would i be able to do that?
View 10 RepliesCreate A Text File Or See If A Text File Exists When Application Starts?
Nov 3, 2009I want to create a text file or see if a text file exists when application starts. The problem I was having was after creating the text file, I tried to write to text file and got an error saying that another process was using it.
Dim test As String = My.Computer.FileSystem.SpecialDirectories.MyDocuments & " est1.txt"
If System.IO.File.Exists(test) Then
MsgBox("File Loaded")
Else
[code]....
I looked up topics on filestream, but am unsure if this is how to use it. Is my code ok? Is there another way to create a text file?
Create A New Table In Access Using VB 2008 Express?
Jun 12, 2009I am working on my new project and I need to create a table for each user dynamically. In which the user will provide the Table name in the textbox and on pressing Create button a new table gets created in the same MS access database file with the provided name.[code]...
View 17 Replies
