Well I've recently discovered that trying to create a file with so-called 'illegal characters' will cause your application to crash.. How do I find these characters in a string and replace them with nothing?
The invalid characters are / : * ? " < > | if that helps.
I have a string. I need to check what characters it contains because certain invalid characters are causing my sql query not to work. In the query I select where SupplierName is equal to the string. I need to replace the invalid characters at database and vb level. But I need to know first what the characters are.
View 15 RepliesI am using a Balloon tooltip to show the user which characters are invalid as a filename. I use the IO.Path.GetInvalidFileNameChars array and convert each character to a string, before appending it to a "Invalid filename characters:" string.
vb.net
If IO.Path.GetInvalidFileNameChars.Contains(e.KeyChar) Then
e.Handled = True
Dim str As String = "The following characters are invalid filename characters:" & nl
Dim invalidChars As New List(Of String)
For Each c As Char In IO.Path.GetInvalidFileNameChars
[Code] .....
The result is not pretty: How do I get rid of the 'non-visual' characters (they are probably newlines, backspaces, null chars, etc) so they don't clutter up the list?
I have a TextBox with a list of filenames in it. The user is able to change these file names, but I don't want them to enter invalid characters, such as slashes or question marks.
I've tried two approaches, but they are not satisfactory:
1. Detect the key pressed with the KeyDown event:
Use e.KeyValue to detect keys like Keys.Oem5 (= backslash), then use 'e.SuppressKeyPress = True' to suppress the key.Problem is, with different Keyboard layouts, The Oem5-key isn't always a backslash.
2. Filter the text:
Use the TextChanged event and do a Replace("", "") on the text for every invalid character (there's 9 of them).Of course this will create 'lag' with every keystroke, especially if there's a lot of text. Also the text-cursor and scrollbar will jump back to the top-left when using Replace.
In short: I'm looking for a way to detect the character that is being entered and suppress or remove it when invalid.
i have an application of developed by .Net, i can use it my computer and other pc but only in one pc it isnt working and it give an error message "Invalid characters found in mail header" operatins system is Windiws 7
View 3 RepliesI am developing an test application to read the data coming on serial port sent by the pabx. It is working fine. But, for some reason , i don't know why, some invalid characters are coming in the data, something like '?'
[Code]...
how I would find certain characters in a string.
View 4 RepliesI have a text file that is automatically generated by an older computer system daily. Unfortunately, the columns in this file are not delimited and they are not exactly fixed width (each day the width of each column could change depending on the amount of chars of the data in each column). The file does have column headings, so I want to find the width of each column using the column headings. Here is an example of the column heading row:
JOB_NO[variable amount of white space chars]FILE_NAME[variable amount of ws chars]PROJECT_CODE[variable amount of ws chars][carriage return]
What I want to do is get the index of of the first char in a column and the index of the last white space of a column (from the column heading). I would want to get the index of the "J" in JOB_NUM and the last white space before the "F" in FILE_NAME for the first column.I guess I should also mention that the columns may not always be in the same order from day to day but they will have the same header names. I know I can use the string.indexOf("JOB_NO") to get the index of the start of the column, but how do I get the index of the last white space in each column? (or last whitespace before the next first non-whitespace that denotes the start of the next column)
I am working on a program and for one of my features, I need to replace all spaces in a program with - (dashes.) Is there a way in which I can do this?
Example:
Start String = "The rain in Spain falls mainly in the plain."
End String = "The-rain-in-Spain-falls-mainly-in-the-plain."
[code].....
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)
Dim dbconn As OleDbConnection
Dim DBCommand As OleDbDataAdapter
Dim DS As New DataSet
dbconn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:COLORsitedataCUFORHDR.dbf;Extended Properties=dBASE IV;")
[Code]...
I prefer SQL server but im afraid in this app I have no choice. I think the .DBF file is v III dBase according to a thrid party .dbf viewer. The code explodes on the DBCommand.Fill(DS) line, telling me I have provided and invalid file path. The path is good to go.
Should I be using a driver with a different provider? When I remove the Extended Properties parameter I get an error unrecognizable database format - hinting in this case the path is correct.
In a text file I have users add a folder using the folderbrowserdialog users then push add which appends the text with lets say they selected downloads
Downloadsname=Downloads
downloadspath=C:documents and settingsJamesDesktop
how can I make it so that when they push a button it seraches for downloadsname then after the = is the text to use as a string and do the same with downloadspath
Well I basically know how to read a text file, replace text then write to one. how to append text after a specified string (ie, insert text at a specified line, removing the text after a string in a line and changing it without altering other lines, etc). Can someone please tell me how I would go about adding a string after a certain string in a text file? For example:
I Have:
test
example
hello
[Code]....
I have a ComboBox with
ComboBox1.AutoCompleteMode =
AutoCompleteMode.SuggestAppend
ComboBox1.AutoCompleteSource =
AutoCompleteSource.ListItems
How do you prevent a user from typing characters that are not in the list of options?If the list in the Combo is for example
aaa
abc
acd
How do you stop the user typing ad?
On one of my projects, when I try to run it, I get a "Invalid command line switch for "AL.exe". Illegal characters in path." error. I have installed the "Windows SDK for Windows Server 2008 and .NET Framework 3.5," and this error is after installing it.
View 2 Repliessave/create a file with a character such as ; or or * in the name then windows will tell you that you cant do that. However, this is obviously possible via some programming languages (im assuming VB.NET probably throws an exception if you try this).So here is my situation - my program works with some files that are produced by a third party program and these files get named whatever the subject of the email that each file relates to was. So if one of these emails had a subject of "Hello ;" then the file would be saved as that name by this third party program. The problem is when my program comes to rename this file or move it then it just throws an exception basically saying that the file doesnt exist, however it works perfectly fine with files that dont have these illegal characters in so it is definitely that thats the problem.
View 17 RepliesI wonder if it is possible to find a specific row and specific columns in data base file (Access) . You see , I am using a DataGridView control to show only SOME of the columns (fields) of a table from an Access file . For example , lets say that in the DataGridView control I only show the following fields :Field1 , Field2 and Field3 .Now , when the user selects an entry in the DataGridView control , I want to insert the text from Field4 into a text box on the form .
The problem , however , is that I don't know how to get the specific row in the data base file and also I don't know how to get the text in column (field) Field4 of that row .One thing that might be important is that the index of the row in the data base file is not necessarily the same with the index of the current row in the DataGridView control . This is because in the DataGridView control the rows are order by the contents in the ID Field .ol .
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]...
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].....
I will have a directory of files (IFO, BUP, and VOB; DVD files for anyone who cares), I need to find the first one by sorting these like this: Filter out everything that does not have a .VOB in it, then find the one like this VTS_**_1.VOB. It will always have a "1" before the extension, but the two numbers before that change, lastly I need that file returned as a variable.
View 4 RepliesIs there a better way of finding the path of a file that was opened with the open file dialogue? This is what I did. It works, but it seems like there should be a way to get the path through one of the open dialogue options.
Code:
'm_PicSource = OpenFileDialog1.FileName
'm_PicSource is a global var
Dim strCnt As Integer = m_PicSource.Length - 1
[Code].....
I am creating a VB.NET (2005) GUI that uses several controls embedded into tab pages.When VB.NET autocompiles (if I switch windows) it adds lines of code to the .Designer file that causes errors:Windows' is not a member of 'System.Windows.Forms.TabPage'.is generated for:
Me.tbRxMinValidBits.TextAlign =
System.Windows.Forms.HorizontalAlignment.Right
The underlined part is what .NET is showing as the error.
[code].....
ok.. i have i "Worldchat.rtf" on a server.. that was a .txt before.. but i can open it whtout problem in windows. Dim strtemp As String = My.Computer.FileSystem.SpecialDirectories.'downloads the fileRichTextBox1.LoadFile(strtemp & "" & "worldchat.rtf", RichTextBoxStreamType.RichText)gets a error saying "file type invalid"
View 8 RepliesI need my published vb 2008 application to open a helpfile that I wrote. It is a simple .txt-file and this piece of code does the trick as long as the program is not published because I already know where I placed the Helpfile:
System.Windows.Forms.Help.ShowHelp(Me, "C:Helpfile.txt", HelpNavigator.TableOfContents)
After it is published on another pc, the helpfile is not on the root of the c-drive but in the application folder of the program. However, I can not know where the path to the program folder of someone else's pc is. It all depends on where they decide to place the program when they install, right?
It seems I need to replace this little: "C:Helpfile.txt" with some code that searches all the drives and directories and/or points directly to the Helpfile's placement - i.e. the parent directory of the program.
I am trying to search a drive letter (C drive) for a file in Vb.Net 2010. After I find the file path I want to run the executable. This is the code I am trying to use to find the file:
path = Convert.ToString(IO.Directory.GetFiles("C:", "wswc.exe", System.IO.SearchOption.AllDirectories))
[code].....
i'm new to vb and am making a program that opens a text file, removes characters and then saves the file. so far i have the following
[Code]...
I deleted the images that I thought I will not need but the program would not run. Error 1 Invalid Resx file. Could not find a part of the path 'E:Code6 04-01-2010 evening Code5 ResourcesIMG_3514.JPG'. Line 123, position 5. E:Code6 04-01-2010 eveningCode5My Project Resources.resx 123 5 Code5.I even deleted the folder to make it worse.The project is code5 but it is running inside the folder of code6.
View 3 RepliesTrying to run the following
treeval = e.Node.Text
Dim strVal As String = New String("LDAP://10.22.67.21:389/OU=Linkway,OU=Desktops,OU=Devices,DC=domain,DC=suffix")
Dim domain As New DirectoryEntry(strVal & "'DOMAINusername', 'password'")
[code]....
I get an error saying "Invalid dn syntax"
I'm writing a program and it's got a textbox for the user to enter values. Since the textbox text property should only be a "number", my program need to detect invalid charaters like "*/&()$" and tell the user to only enter a number. Does anyone have an idea how to do that?
View 6 RepliesI have a program that parses INI files (yes yes, I know, but I'm stuck with using them, not my own request), and it downloads external images (if the INI contains the path) to the program and cache's them.
Recently, I've run into a snag with the system. Most of the images use Imageshack for storage, but one of them has suddenly 404'd, and whenever I set it to the picturebox to the downloaded image, I get an out of memory error rather quickly (and the file itself is 1kb).
I guess I need to implement a checking system offline to find out if the image is actually an image or just a '404' text...but is there a way to not have to implement this clientside, and have it be checked when I download it?
[Code]...