ChrW Function And Handling Invalid Inputs
May 9, 2010
At the moment im working on an encryption program, just to prove something to myself. At the moment I have a problem, when I run the program it will drop a few characters and return wrong characters, here is the encrypter code.[code]the difference between the encryption and decryption code is that the decryption is the addition the square of the position of the characters and the encryption is the subraction of the sqaure of the position of the characters [code]
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Jul 15, 2009
I'm using WMI code and VB 2008 to see NIC status. So far the queries are working, but the methods aren't. For example, I'm trying to set a network card to use DHCP, I get invalid function with this code:
Dim classInstance As New ManagementObject("rootCIMV2", "Win32_NetworkAdapterConfiguration.Index='7'", Nothing)
Dim outParams As ManagementBaseObject = classInstance.InvokeMethod("EnableDHCP", Nothing, Nothing)
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May 14, 2009
difference between converting TO chr and chrW?
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May 19, 2011
In VB.NET 2008, I used the following statement: MyKeyChr = ChrW(e.KeyCode)Now I want to convert the above statement into C#.
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Jul 23, 2011
We generally have main block to start the program or application first form.I wrote some code in main and it is within try can catch block.Catch block the errors. This try catch block is a global try catch for my whole application.Now if exception occur in the code will be handled in this catch. But Is there any good way to handle the exception in the catch block if occur?as I write error in log file but sometimes file can have permissions for writing etc and it can create exception.As this try catch is the outer most try catch block and if any error occur in that catch it will cause application to crash.
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Sep 12, 2011
Public Shared Function GetData(ByVal id As Integer) As List(Of SomeClass)
Dim command As New OracleCommand
Dim conn As New OracleConnection(WebConfigurationManager.ConnectionStrings("ConnectionString").ToString)
Dim param As New OracleParameter
[code]....
This function is giving an ORA-00911 invalid character error. I have other methods of the same style and these are functioning correctly.
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Mar 25, 2009
When I run my application the following code prompts an error. Ideally, I want to populate the TxtOracleNo with a value read from another table on my form based on certain conditions i.e., prac_no, prac_eid and pay_method is the same in both tables then populate the Oracle No on TxtOracleNo text box.
The error given is
"Invalid attempt to read when no data is present"
The function is shown below
Private Sub Oracleview()
'Open the database.
'Delete any existing record
Dim cmd As New SqlCommand
Dim conn As SqlConnection = GetDbConnection()
[Code] .....
I checked that data in the database and it is available in both tables. Probably, the problem is where I call the function. Presently, I call it on loadform.
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Oct 3, 2009
I thought I was done with the tree view control until i realised that my tree view control was behaving differently when it came to sub nodes . I have attached my treeview pic and also a sample tree view.
(-)D:
|_config.msi
|_netfile.sys
[Code]....
Since I clicked on subfolder1 i was expecting the msgbox to display D:Folder1Subfolder1 but unfortunately the msg box doesnto even have the name of the node i clicked on but when i use selectednode.text I get the correct node text. Anyways why isnt my full path working. I then tried manually designing the entire scenario using tree node editor and the code which i mentioned above works. But whenever i populate the trr programatically the above problem starts.
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Nov 3, 2011
My console errors out when I enter anything other than a number or operators in the designated (input). I stink at this stuff but I have been t this for about 8 hrs. still not there. I have included a text file for the task at hand
[Code]...
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Jun 2, 2010
I'm getting Invalid column name 'CHARLES'. Invalid column name 'CHARLYN'. Invalid column name 'SMITH'.what's wrong with my code, it's been a long time since I used SQL dataset. I'm into LINQ but I'm having problems with this kind of LINQ query so I'm reverting to SQL dataset.here's my code:
'Set up a data set command object.
Dim sSelectColumn As String = ("SELECT * FROM tblScanned WHERE LastName=" & sLastName & " AND FirstName =" & sFirstName & " AND MiddleName =" & sMiddleName)[code].....
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Sep 9, 2011
where I was encrypting the string and passing it to another web page to decrypt and get the ids to be displayed as a pdf back to the page. I kept getting an invalid "Invalid length for a Base-64 char array". It was then I realised that the string was getting truncated and that the IE Explorer had a size limit for the number of charaters being passes as a querystring.So I think I need to go the route of posting it.But not sure how to go about it.
Private Sub GetReport()
Try
Dim hawbs As String = String.Empty[code]....
The retrieve document then does: the decrpytion gets the data(ids) and pulls the pdfs.
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Oct 12, 2010
vb.net
'' Project name: Golf Pro Project
' Project purpose: Displays the commission based on a
[code]......
i dont know how to assign variables and im juist totally lost right now and this is due today and i was sick 2 weeks and am 2 chapters back.
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Nov 12, 2009
Probably another crazy question here, I have my rc car able to move by inputs I make to the keyboard of my laptop, is there a way for my vb code to record those inputs so that I can push a button and it will recreate my inputs?
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Feb 11, 2012
I am developing an FTP program which: Watches a folder. If a new file is dropped there then upload it. Tells user if uploading and when complete. All the above works, however I wan to add the items to a listbox that are being uploaded. So if I dropped 3 items there it would look like :
Upload Listbox:
cake.jpg
myExcelFile.xls
woot.docxAnd as each one is done, or new files are added it removes them or adds them.
I tried using que, but with no luck as the program just hangs whilst it uploads. So I had a search and looked into multithreading and I tried to implement it, but I can't get it to work as it gives me some 'delegate signature' related error message as you can't pass in values when trying to use 'AddressOf'.
Here is my code for the The .created sub:
Public Sub FSystemWatcher_Created(ByVal sender As System.Object, ByVal e As System.IO.FileSystemEventArgs) Handles FSystemWatcher.Created
'if any file created add fullpath to the listbox
ChangeLog.Items.Add("Created: " & e.Name)
QueueListBox.Items.Add(e.Name)
[Code] .....
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May 18, 2012
Has anyone any experience in using a Digibee. I am trying to read 4 switches.
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Feb 16, 2011
I am stuck on a homework problem and was wondering if anyone could help out a beginner.The question reads:Calculate the amount of a server's tip given the amount of th bill and percentage obtained via input dialog boxes. The output should complete sentences that reiterates the inputs and gives the resulting tip.
here is what I have so far:
[Code]...
It works fine if I input the tip percentage as a decimal, but I need to be able to input a whole number for the percentage, and in turn, output the correct decimal. I'm sure this is a pretty easy fix,
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Jul 13, 2009
how can i select all inputs of thisweek entry.in my database i have fromdate and todate fields, now how could i select if i'm in anyday of the week but i have select to display thisweek activities. it will display into the datagridview all the activity setted for this week...exam in Microsoft outlook there, Day or today, and work week and month button..if i select today or day it will deplay in the datagrid all activties for the day, and if i select work week it will display activities for the entire week.. and month also...i'm using visual studio 2005 and access 2003
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Sep 14, 2010
I migrated an application from Vb6 to .NET and there are still a few bugs to fix.One of them is when I want to edit a record, the inputs should have been populated with the coresponding data from the database. Instead, only the drop-downs are populated, the text inputs are blank.
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Nov 17, 2011
i want to convert text box inputs into a list box. i have 7 text boxes like; fname, lname , email, phone, etc
how would would i call those textboxes into a list box. also it it possible to make headers for the the listbox.
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Jan 12, 2010
I have three different textboxes on my form. What I am trying to do is send the inputs the user puts into the text boxes in an email. I have the email working but all the text is run together. I would like to have the inputs from the different textboxes to be on separate lines.
Here is the code I have.
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim mymailmsg As New MailMessage
Try
mymailmsg.From = New MailAddress("gdy3eg3oyge@gmail.com")
[Code] .....
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Mar 3, 2009
I'm not sure the best way to accomplish this, what i have is 10 checkboxes on a form named chkbox1 to chkbox10, say ther user selects 4 then clicks a button, i was wanting to execute code one after each other like[code]...
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Dec 15, 2011
[code]What I am trying to do is to navigate to a website and download all the inputs of the form on that page. Doesn't matter what website I use I can't get beyond this error code.
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Apr 2, 2011
I have a recursive function that causes a stackoverflow for big inputs. So I want to enlarge my stack. I have never worked with threads so maybe I'm doing something wrong but when I try to make a new thread, the description for the second argument (StackSize) says that if I use a stacksize bigger than the default one, this argument will be ignored and the default size will be used. How to increase the stacksize? Or how to create a thread with a bigger size than the default one?
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Mar 18, 2010
How can I save and open a file with inputs as follows:
1. numeric up and down
2. combo box
3. picturebox
how can i do it in visual basic 2008!...
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Dec 9, 2010
I'm trying to create a User form that has six inputs.
1.) User input textbox 5.00 to 60.0 inches only accepted.
2.) User input textbox 2.50 to 30.0 inches only accepted.
3.) User input textbox 6, 8, & 10 nominal input only accepted.
4.) User input textbox 60% or 65% only accepted.
5.) User input textbox 2.50 to 30.0 inches only.
6.) User input textbox where 500 shows up in the box as "standard" but can be changed by user input.
Then an "OK & Cancel" button. I don't know whether to use a dialog box or a form, what class, masked text box vs. not masked, etc.
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Jan 18, 2012
How can I prevent users inserting sql injection in my database? How can I validate their inputs? I am new with this sql injection. I don't know how to prevent users to insert this sttmnentif and I don't have the idea of sql injection how can I be sure that I am safe with sql injection??
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Mar 11, 2009
working with Adobe .pdf files. I have an Adobe .pdf template that allows the user to enter text into different parts of the .pdf template (such as name, address, etc.) I have been developing a VB.Net program that is made up of a set of user forms. I would like to be able to have data that the user enters into textboxes on the VB.Net user forms write to specific areas of the Adobe .pdf template on the click of a command button. I have searched MSDN and Google but I have been unable to find any information on this particular task. If it is can you recommend a MSDN type article or any articles/books/message board posts that provide guidance on how to proceed with something like this.
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Jun 25, 2009
I was trying to find examples of how one would make a webpage using asp so that I could have the visitor enter information on a form and then when they hit submit it will be attached to my webpage indefintaly and any visitor can view it.
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Sep 12, 2011
Public Class Form1
Dim conn As String
Dim ds As New DataSet
Dim da As New OleDb.OleDbDataAdapter
[code]....
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Sep 3, 2009
How do i check if user has entered all inputs and go to the next form.
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
t1.Focus()
End Sub
[code]....
In this code it gives an error, but after displaying the error it jumps to next form.
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