I'm developing a winform application. I want to take input from user (i.e. the user provides username) and use that input as part of filename and save to file.How do I check if the username provided by the user didn't contain windows' reserved characters. And what is the list of reserved characters for windows?
View 1 RepliesI have a mySQL table(IMP_SCANS) holding the file, it's name and size for every document:
scan_1 blob
description varchar
filesize int
doc_no varchar
doc_date date
I managed to insert a file to the table. Now I need to save the file to disk.
So I have the code:
Dim conn As New MySqlConnection
Dim cmd As New MySqlCommand
Dim myData As MySqlDataReader
Dim SQL As String
Dim FileSize As UInt32
Dim fs As FileStream
[CODE]............
I all works fine up to the line: myData.GetBytes(myData.GetOrdinal("scan_1"), 0, rawData, 0, filesize) Where it says "Object reference not set to an instance of an object". I cannot figure out why I receive this error.
I want to save the files as pdf,jpeg,txt,gif etc to disk from database. In database it is stored as binary data.
View 2 RepliesI am wondering how to save a textbox contents to disk?? Using the MSDN help I was able to come up with this code so far. I have a menu strip item labled "save as." when I click it the prompt to allow you to pick a location to save comes up and it will save a text file to the selected location but the .txt file is blank. How do I set this code so that it knows to save the contents of the textbox.
[code]...
am wondering how to save a textbox contents to disk?? Using the MSDNI was able to come up with this code so far. I have a menu strip item labled "save as." when I click it the prompt to allow you to pick a location to save comes up and it will save a text file to the selected location but the .txt file is blank.
Dim saveFileDialog1 As New SaveFileDialog()
saveFileDialog1.Filter = "Text|*.txt"
saveFileDialog1.Title = "Save File As"
[code].....
How can i save an array of string to disk??
lets say we have
Dim myStringArray() As String = {"A","B","C","D",.......,"Z"}
and wanted to save it to a binary file on my disk.
later i want to be able to read it and load it into memory.
How can I transfer entries from listview to disk using System.io?
View 2 Replieshow can i save image from picturebox or from url to disk i have found a similar post but is for asp.net and i looking for vb.net and i looking a simple function.
View 2 RepliesI need to use a virtual drive (ram disk) to save data temporarily. Which ram disk program is good to use.
View 6 RepliesI made a painting on a picturebox in Visual Basic 2010. Now I wish to save that picture on my harddisk. But
pictureBox1.Image.Save("C:MyImage.jpg")
does not work.
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Imaging
Imports System.Text
Public
Class Form
[Code] .....
I want webbrowser1 to navigate to a list of URLs that will be read in from a text file. (I left that part out of the below code and just manually entered urls as examples.) What I have found is that the webbrowser1 will navigate to the urls, but it will not stay long enough to get anything from them. In this example, not even the final page loaded ends up getting saved. Can someone tell me how to halt the attempt to save webbrowser1.documenttext until it is fully loaded?
View 5 RepliesI am using webcam and want to record video and save it on disk, the video time must be constant for such 20 or 30 sec, what i want is to change CAPTUREPARMS members which contain fLimitEnabled & wTimeLimit
'---capcaptureget function
Function capCaptureGetSetup(ByVal hWnd As Integer, ByVal s As Long, ByVal wSize As Integer)
capCaptureGetSetup = SendMessage(hWnd, WM_CAP_SET_SEQUENCE_SETUP, wSize, s)
End Function
[Code]...
I have a program for collecting data of people. Now i also have a picture of these people... what is the best thing to do? what is the fastest? the safest?
1. Converting a picture to a bytearray an then insert it into a sql -table (with al ready 5 columns).
2. making an new table on the sql database with just two columns (id-ref, picture-column)
3. or saving a file on to the hard drive? (if nescessary saving the url into the database?)
where do can I find the save disk icon on the toolstrip.
View 2 RepliesI would like to know how to save data without click on the floppy disk on binding navigator. IS there any coding which i can use under a button to do the same function as binding navigator.I just want to use button to save and delete data rather than binding navigator.the data which i am using is in datagridview and details view?
View 2 RepliesI have webcontrol inside windows application now i want save image inside page on my local hard disk?
Is it possible to build a windows disk defrag program in visual basic 2010?
View 3 RepliesCan somebody tell me how to call Windows Hard Disk Defragmenter in VB.Net on Button Click.
View 4 Replieshow to call Windows Hard Disk Defragmenter in VB.Net on Button Click.
View 1 Replieshow to call Windows Hard Disk Defragmenter in VB.Net on Button Click
View 1 RepliesIs there a function that determines the letter that windows is on installed. For example:
D:
C:
G:
etc...
I made a code that starts the Disk Check on boot time it works fine on Windows Vista and Windows Xp but on windows 7 I checked the path at were windows 7 stores BootExecute and it is on the same path. Maybe the system is blocking it. Or do i have to change the code.
Here is the code:
Dim rk As Microsoft.Win32.RegistryKey
rk = My.Computer.Registry.LocalMachine.OpenSubKey("SYSTEMCurrentControlSetControlSession Manager", True)
rk.SetValue("BootExecute", "autocheck autochk /p ??" & Drive) 'Turn ON
The Drive String just gets the name of the drive for example C: or D:
I had more problems coding for a windows 7 machine then Vista.
I am trying to write a code to save and open data that is in my application. My application contains hundreds of text boxes, combo boxes and labels. I have created an array for each set of data, i.e.,
glist(0).store=combobox1.value
glist(0).cat=combobox2.value
glist(0).it=label3.text
glist(0).quan=label4.text
glist(0).total=label5.text
up to glist(89).
Is there a way to write a code to loop through the array and save the values so that they can be opened at a later time in my application? The array will contain Doubles and Strings.
I'm trying to do the following I'm not sure if it's possible using VB.NET. I want to specify default saving point for all files type for example: In my program you choose the path "C:UsersMarkusPictures" for pictures and everytime you download pictures files from website, or using skype or any other program when Save File Dialog opens up (external one not via my program or connected to vb.net just the windows default one) then it will show "C:UsersMarkusPictures" always for .jpg .gif type of files etc...
View 2 RepliesDoes anyone know how to capture (Record) the Windows desktop and save it as a '.avi' or '.mpg' file. This functionality can be done using screen capture / presentation programs like SnagIT:[URL]..I have found many examples showing how to capture from a webcam using the 'avicap32.dll' DLL file but these dont help with this problem.
If you are asking why i dont just use SnagIT its because the interface is overly complex and building my own version would allow me to intergrate it into my existing programs.
I have two windows vb.net form. I got a text file. I am trying to encrypt some data and save it to a text file with the 1st windows vb.net 2005 form. Now with the second one am trying to decrypt the data and retrieve it here.
View 3 RepliesI was thinking to make an app to save images [or download images] to local hard disk. But to keep it easy, I want this app to create a small picturebox on form to show the thumbnail of downloaded image. Lets say a 5 pictureboxes has to be added with the thumbnails to show the recent downloads. A user can save the location where he wants to save the files on hard disk. A listbox or a dropdown menu will help in categorizing the images, like image1 in friends section, image2 in family section, image3 in others, etc... When the program restarts all the latest 5 thumbnails has to be loaded in pictureboxes and the directory that was chosen. Finally, a button that shows the downloaded images into original image file size one by one or a slide show. Is it possible to make such program?
View 2 RepliesThe following gives me an error when I try to open an Excel file if the value of lblFileName is different than the file on disk by differences of upper or lowercase letters.
[code]...
I have following instance of System.Collections.Specialized.NameValueCollection:
Dim UserSelection As New System.Collections.Specialized.NameValueCollection
UserSelection.Add("D_Color1", "Black")
UserSelection.Add("D_Color2", "Green")
UserSelection.Add("D_Color3", "Purple")
I need to save this instance to hard disk and then load it back from hard disk as an instance. How do I do that?
I'm creating an admin backend on my site. All the user content that goes on the site will be stored in a database table called Pending. There are other tables where the content will go once approved (Guestbook, Quotes) but if the content is rejected, it'll just be deleted.I know how to delete the content from the database, but I'm having problems will the approval system.On the approval screen, the admin will see a DataGrid that's databound to the Pending table. There's a button that the admin will click to approve the content (based on a checkbox selection or input of a uniqueidentifier entered into a textbox.Can anyone give me an idea on how to move the content from one table to another? Some sample code would be very nice.I'm using VS2005 with SQL Server 2005 Express.
View 1 Replies