How To Verify If Value Actually Exists
Feb 10, 2011
I've created a little procedure that I use to verify if a value does actually exist. I'm currently using this all throughout my application for things such as verifying if a control's EditValue actually has a value. I was wondering if I have missed any scenarios where a value would not be available, missing, non-existent, blank, etc., and how would I incorporate in my procedure.
Public Function ValueExist(ByRef CheckValue As Object) As Boolean
Try
ValueExist = True
If IsDBNull(CheckValue) Then
ValueExist = False
[Code] .....
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Jan 20, 2010
I'm trying to do an if statement to determine whether a value entered in a text box exists within a column..
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Jan 23, 2011
I am making a program that Calls on a string in a dll to verify that the program is registered. Any idea on what functions I need and how to write a string in a dll?
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May 13, 2010
I would like to know if there is any way that you can verify that a email address actually exists like using this tool: [URL]. would like to wirte an application that does this in visual basics.
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Apr 30, 2010
git this login form, streamreader looks for a matching user name and password and everything seem to be ok until i run it. I'm getting this ERROR: "veryfy that the file exists in specyfic location" this is code:
Imports System.IO
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code].....
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Mar 3, 2010
I am working on an app and cannot remember how to verify that the first three characters in a zip code are a specific number.
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Nov 17, 2011
I have not been able to successfully verify a user with LDAP for an ASP.NET web application. I have done so on our own network against Active Directory, but this is against a server outside of our network that is OID (Oracle Internet Directory).Usually, I use the following code with no problem.
Dim myDirectoryEntry As New System.DirectoryServices.DirectoryEntry("LDAP://1.2.3.4:999/OU=SomeOU,DC=Something,DC=com")
myDirectoryEntry.AuthenticationType = System.DirectoryServices.AuthenticationTypes.Sealing
myDirectoryEntry.AuthenticationType = System.DirectoryServices.AuthenticationTypes.Secure
Try
[Code]...
After that, I haven't been able to find a method to verify a user's log in information with their password and then pull back some information.
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Sep 28, 2010
I know this is a stretch, but I am looking for some .NET help with checking Joomla passwords.For those not familiar with Joomla password scheme, it looks like this: {MD5Hash}:{SALT}HEre is the code I am using:Joomla password:
9322a02004887255b76a6a8e8971aea7:5JTTaPQjA88247nCKkTILtv8TXFtZCED
User submitted password: 123456
Dim m5t() As String = dr("password").split(":") // splict Joomla password
[code].....
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Jan 10, 2011
What is the easiest way to verify if a number is odd or even?I'm setting up a program, and it is checking if a user input number is even or odd, if its odd, it runs this, if even, it runs this.Its a simple if/then, else statement.
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Apr 11, 2010
How would you verify if an IP address resolves to a computer name correctly from a textbox?
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Jul 18, 2011
I have a dll installed on my machine and want to find a way to verify this programatically with VB.Net. I have been trying to use LoadLibrary but it always returns a zero. Can someone provide a code snippet of how I might do this?
Also, if there is another way to verify that a dll is installed, without having to supply a full path, please let me know.
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Mar 20, 2009
Im exporting a datagridview to excel but i want to check if this datagridview has any data before i allow the user to export.Heres some code,
data=datagridview, con.ejecutasql=oledb returns datatable.dt = con.ejecutaSql("SELECT * FROM sistema")data.DataSource = dtPrivate Sub print_excel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code].....
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Feb 1, 2011
I have bulk email id in database. I need to verify whether email id is existing or not before sending a mail in asp.net.
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Mar 31, 2010
There is a situation that I couldnt handle, I have 4 TextBox's and I am assigning the text to variable after loosing focus for 4 TextBox's as below;
(Variables assigned under class Form1)
Private Sub TextBox1_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.LostFocus
[code]....
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Feb 13, 2011
what I have to do is a magicbox, i need to put 9 numbers in 9 text boxes, and verify that they r not the same, im doing it trough the TextChanged event. i do have some code, but is incomplete... and doesn't really work
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
TextBox1.TextChanged,
TextBox2.TextChanged,
TextBox2.TextChanged,
[code]...
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Mar 11, 2010
[code] this code need to verify the level of login, i mean if the user is admin then proceed to the next form with privileges but if is a visitor then proceed to the next form but without privileges.
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Apr 23, 2012
I've got records that I am adding to the database but I wanted to know how I can verify if the record has been inserted into the database. Below is the code that I am using
Imports Microsoft.Office.Interop.Access.Dao
Public DatabasePath As String = "C:WB2020WB2020WB2020inDebugWBS3000A.ACCDB"
Dim AccessEngine As New DBEngine[code]......
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Nov 28, 2010
I am trying to verify that a string contains nothing but known values. In this case, I need to make sure it contains only "Shift", "Control", or "Alt", but not necessarily all of those. For example, these should be true: "Shift + P", "Shift + Control + H", "Alt + U; but these should not: "Other + P", "Shift + Fake + Y", "Unknown + Shift + E" etc.This is the code I tried to use:
If Not shortcut.Contains("Shift") Or Not shortcut.Contains("Control") Or Not shortcut.Contains("Alt") Then
MessageBox.Show("Invalid")
End If
I'm having difficulty wrapping my head around the needed logic to do this. I'm assuming there's a logic operator that can do this?
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Jan 17, 2012
I am attempting to compare a bitwise clone object to its parent to check for changes using:
If Not objCP.Equals(objCPClone) Then
'do something
End If
and it always compares as not equal even immediately after creating the clone. How should they be compared to check for changes?
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Mar 8, 2010
I am writing an Excel addin to read/insert/update/delete SQL data. I am looking for tips or code samples to check if the user running the addin has select/insert/update/delete permissions. this would work on SQL 2000, 2005 and 2008. I have found the following which works for SQL 2005 (and likely 2008, though I have not tested).
Use AdventureWorks
Go
SELECT * FROM fn_my_permissions('Sales.vIndividualCustomer', 'OBJECT');
Go
[code]....
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May 4, 2011
I need to create a function that will verify a password.The function will be named IsValid.
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Nov 15, 2011
Private Sub frmRegistration_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
cn.Open()
cmd.Connection = cn
cmd.CommandText = "Select * from Registration"
[Code] .....
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Mar 10, 2011
How can I decrypt a file encrypted in vb.net? Is there a possibility here?
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Nov 22, 2009
Well its not very important, but i have 500 emails (yahoo) and i want to make a program that checks if these emails are valid. Basically i want to send newsletters to these emails, but i want to know if the emails are really valid. How can i do that. I know there are some programs i can use, but i want to make my own program.
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Apr 30, 2012
So I'm developing a minesweeper game and im assigning the mines, but i'm unable to create a algorithm to stop a mine to go to a place where there's already a mine, here's what i have so far:
Public Sub initflags()
Dim line, column As Integer
For line = 0 To 9
[code].....
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Oct 8, 2010
I have a string: Dim strXMLTags As String = "<tags><test>1</test></tags>" And I want to verify that all opening tags have a closing tag in the proper place. So if I put the previous string through, it'd work. However, if I put: Dim strXMLTags As String = "<tags><test>1</test>" Then I want it to give me an error. Is there an XML structure checker or something of the sorts? Or should I just try and load it to an XML document and if it errors then, then I know.
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Nov 24, 2009
I can not find the proper way to verify characters only in a text box.I am having a hell of a time trying to understand all that.I have 3 errors in my code.One error is "Error-Reference to a non-shared member requires an object reference."the other two errors are in reference to an explicit conversion from string to double.strName is what I am using as my variable for the input of the name in txtName.text Below is my full code. "----" are used to separate the classes.Attached documents are in .PDF format and HAVE TO BE FOLLOWED to the letter.Pages 2 & 3 contains the UML diagram as well as how the project should look and the structure chart for the code. I am not truly sure if my DisplayReservation is what will work to use in the list box.Is there any other reference I could get to help me understand how to use a list box as the project requires.[code]
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Sep 26, 2010
I am trying to use the AAA syntax in Rhino Mocks with VB.Net to validate that a method was called only one time. I can't seem to get it right. With this code, if the repository is called twice, it returns nothing on the second call, and the test passes. I would have expected the test to fail when VerifyAllExpectations was called.
<TestMethod()>
Public Sub GetDataCallsRepositoryOneTime()
Dim repository As IDataRepository = MockRepository.GenerateMock(Of IDataRepository)()
[Code].....
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Aug 26, 2011
I have a process that I wrote in order to perform an NSLookup and output it to a messagebox. I have all that working, but I need to take it one step further. Some of the pc's this app will be installed on will not be joined to a domain. Can anyone provide any assistance with creating a way to check and see if the pc is joined to a domain and/or the domain is available, and then run the process if the pc is joined to a domain and then not run the process if it isnt. If anyone needs any more info just let me know. Here is the process that I wrote:
[Code]...
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Jun 12, 2011
anyone know how to check every single record that we have been inserted in sql server?either exist or not.
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