Saving And Retrieving Picture From Sql Database?
May 24, 2011
i have this code in saving a picture.
vb.net
empno = txtEmpNo.Text
Dim myFile As System.IO.FileInfo = New System.IO.FileInfo(imagelink)
'' Create a new stream to load this photo into
Dim myStream As FileStream = New FileStream(imagelink.ToString, FileMode.Open, FileAccess.Read)
'' Create a buffer to hold the stream of bytes
[Code]...
but when retrieving, i got an error on this part "Dim FinalImage As Bitmap = New Bitmap(myStream)". The error message goes like "System.ArgumentException: Parameter is not valid. at System.Drawing.Bitmap..ctor(Stream stream). maybe someone would like to help me, on where is the origin of this error.
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Dec 15, 2011
i can save the picture in the database, now i have to retrieve it. this is my code for the saving of the picture,
Dim ms As New MemoryStream()
studentpic.Image.Save(ms, studentpic.Image.RawFormat)
Dim arrImage() As Byte = ms.GetBuffer
ms.Close()
[code].....
i saw on the net that i have to the reverse of the pic, i have to convert byte into image.
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Jan 28, 2012
rs.Open("select * from CSOptions where OrderNumber = '" & cbstrCurrOrderNumber & "' and OrderLine = " & CBLI, strConn, 2, 2)
If rs.EOF Then
rs.AddNew()
End If
[code]....
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Dec 15, 2011
I need to save pictures in my database, my database is MSSQL as of now, my code for getting the picture is this:
Private Sub browsepic_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles browsepic.Click
With dialogpic 'Open File Dialog sa toolbox
.InitialDirectory = "C:UsersCAMILLEPictures"
[code]....
how to save the picture and how to retrieve it?
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Dec 18, 2009
I have some pictureboxes on this form set up to allow me to browse for images, then select one and show it in the box. How can I save the picture I pick so it updates a database and will show that picture when I cycle through the data in the program? It would be an SQL database and it already has columns for the picture. I don't know if I should store the path to the image or the image itself.
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Dec 27, 2009
I've made a code which updates my database using a dataset and data binding source. I can retrieve all fields in the database including the �Picture� field which is set to �OLE Object� however I cannot update this. The Picture field in the dataset is set to type System,.Byte. I�ve search these forums and found how to do it manually which I can do and works but when it comes to the BindingSource.EndEdit section it still tries to update my �Picture� field and fails due to a type failure.
It was �System.InvalidCastException: Failed to convert parameter value from a Byte[] to a String. --->� What can I do to correct this? Below is my code. Note the image saves under the hard coding but not in the second part of the code.
Dim connection As New OleDb.OleDbConnection(My.Settings.AirportsConnectionString)
Dim command As New OleDb.OleDbCommand("UPDATE Airports SET Picture = @Picture WHERE ID = " & TextBox10.Text, connection)
'Create an Image object.
[code]....
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Apr 15, 2012
How i can make my project portable.whenever i run my project on another computer it gives an error for wrong path. any code which can choose its path in resourses or debug folder to make a file in project.and whenevre use that file its easily accessable without any error.and file saved in a name series.
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Jun 29, 2011
my code doesn't show anything when ever I start on my button "start recording" it starts to record every keystroke on the and show it in a textbox and after that i am trying to get that data into text of a sql 2005 database with vb vs2008 but when ever I click on the button to show me the saved data , retrieve from database, it doesn't show anything, why?
and I also want to create new row everytime the new object is created...thnx
Databse Class
[code]
Imports System.Data.SqlClient
Public Class DataSaver
Private sqlConnection1 As SqlConnection
[Code].....
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Feb 1, 2012
I work for an FDA regulated company, and they are obviously very particular about keeping track of any software changes. If I build a Windows application and then later wish to make a change to that application, does Visual Studio provide a way to save the source code for the old version of the app and the new version in separate locations?
[Code]...
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Nov 20, 2009
I am having problems with how to save and upload my photogarphs.My problems is i am saving the file path to a field in the database but when i want to retrive it back it does not work..........i am been told to first save the photograph in a folder before transfering the folder path to that database instead how do i do that this is my code i am usind
OpenFileDialog.Title = "Get Image"
OpenFileDialog.ShowDialog()
If (txtpicturetext.Text.Trim() <> "") Then
[Code].....
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Jun 22, 2009
Note: This is in Visual Studio 2000 using a WPF solution. I am saving an bmp image to a SQL image field:
[Code]...
I may be saving the image the wrong way or attempting the conversion incorrectly.
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Feb 4, 2012
I have to store a text file in the form of byte array and has to read it back from the database and need to write on text file. What can i Do? I am using sql server 2008 R2 and vb.net
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Jun 9, 2009
I'm working on a project with a large multidimensional array
resrv(200,12,31,33) it keeps track of information on specific dates within a 200 year range.
What I'm looking to do is save the array to a file so that I can load it again when the program is started.
In VB 6 I used to be able to use a simple for next loop into an open file and load it the same way. It doesn't seem to work the same way with Fthe filestream class in VB.net
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Aug 1, 2009
now the remaining things are done-able but im stuck in new requirement posted by Client which he needs to upload all images from Sql Server to Oracle Database now since old application stores images Path it is kind of new story now ?(:
i tried to build sample application since am not familiar with kind of above requested modification here is my code so far to upload images
'' Sql connection is over
Dim fs as new fileStream (imgPath , io.fileMod.Open , Io.FileAccess.Read)
Dim imgByte (fs.length -1 ) as byte
[Code]......
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Mar 1, 2011
im having trouble with several radio buttons. I have got a EMPLOYEE form, that saves Employyes to a file. I have used 3 radio buttons to state which department they are in.
Employee X is in GRP1 ... etc.
I can save X to grp 1, and retreive this record. BUT another record Y in grp 2, it reverts back to group 1...
If you see what i mean.
Therefore: How would i save which Radio button is selected from the three?
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Nov 6, 2009
This code shows me the preview of a webcam in a picture box. I want to know how to save a frame as a picture file.The code I'm currently using to save it (in the timer tick event) gives me the "Object reference not set to an instance of an object." error..Then I used a debug assert line and it gave me an error that basically says that there is no image in the picture box, while I can clearly see a picture in the picture box. Can anyone please help me write/edit the code to save it?
[Code]...
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Apr 16, 2010
I want to do that when i load form that saved picture is there. I tryed to make code but its dont work , dont show errors too. Mabye its not possible to do that.
Private Sub ToolStripLabel1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripLabel1.Click
Try
Dim dataloader As New System.IO.StreamReader("c:data/Picture.bmp")
PictureBox1.Text = dataloader.ReadToEnd
[code]....
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Nov 6, 2009
I was wondering why my code doesn't work I want to save a picture from a picture box showing a webcam preview.
Code: picturebox1.Image.Save("C:UsersMyUserNameDesktopa.jpg") I think I need to use the "New" keyword to do something - but how?
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Nov 19, 2010
can anyone teach me how to save data in microsoft access database and retrieving it back from database?[code]so, how do i save it in that and how do i load their data by typing their ic no only..
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Mar 2, 2010
i'm trying to save a picturebox but it gives me an error,
pictureBox.Image.Save(sDialog.FileName, System.Drawing.Imaging.ImageFormat.Jpeg)in runtime it gives me this error
"ExternalException is not handled "Generic error in GDI+ "
what's wrong?? to add changes on picturebox i do this pictureBox.CreateGraphics
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Nov 6, 2009
I was wondering why my code doesn't work - I want to save a picture from a picture box showing a webcam preview.[code]
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Mar 26, 2011
I tried this but does not work..
dsNewRow.Item("picture") = PIS.PictureBox3.Image
Private Sub PictureBox2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles PictureBox2.Click
openimage.Filter = "All Files|*.*|Image Files (*)|*.bmp;*.gif;*.jpg;*.png"
[code]....
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May 17, 2012
A picture is displayed from a webcam into a picturebox. That picture must be saved to a specific folder.
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Aug 23, 2011
I'm creating an application that works like a recipe box. it has a picture box that is in the design of an index card, and it has 3 text boxes. I am having extreme difficulty saving the text boxes with the picture. i am using a database so that the info can be filtered, by recipe name, course description (appetizer, side dish...etc).
[Code]...
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Jun 8, 2010
We are developing applications using VB .NET as front end and SQL Server as back end. We want to store and retrieve pictures in a database. We do not want to store the pictures directly into the database but rather the path of the pcitures so that through the same paths we can retrieve them.
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Jan 17, 2009
When I try to save the picture and the picture is already existed it show an error
Me.Location = New System.Drawing.Point(50, 50) Create a new Bitmap object with the screen bounds Dim both As Bitmap = New Bitmap(166, 261, Imaging.PixelFormat.Format32bppArgb) Create a Graphics object that will process the screen shot front and back Dim bothgraph As Graphics = Graphics.FromImage(both) Copy the screen contents bothgraph.CopyFromScreen(0, 0, -506, -279, Screen.PrimaryScreen.Bounds.Size,opyPixelOperation.SourceCopy)' Save the resulting graphics
[Code]...
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Feb 4, 2012
I'm making a screen capturing program, and I am trying to save the image. I can do it as a 'save as' like this
save as
savefiledialog1.Title = "Save File"
savefiledialog1.FileName = "Capture"
savefiledialog1.Filter = "JPEG (*.jpg;*.jpeg;*.jpe;*.jfif)|*.jpg;*.jpeg;*.jpe;*.jfif|PNG (*.png)|*.png"
[code]....
How could I do a quick save option so that it auto saves to a certain location that the user doesn't have to choose and as a .jpg?
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Jun 26, 2010
I have a window form with a parent shown as detail items and two child as datagridsviews. They work perfect when saving and uploading data. The problem arises when I up load a picture to a picturebox and I go to save. I receive error dialog "System data invalid constraint exception: FK WineList_WinePurchase requires the child key values(1) to exist in the parent table. Not sure what happening when I add the picture.
Private
Sub WineList_Load(ByVal sender
As System.Object, ByVal e
As System.EventArgs) Handles
[code].....
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Jun 26, 2010
Im wanting to load a picture into a picturebox before i start with saving the image. but im stuck i cant figure out how to make the code wait.
cover.ImageLocation = file
cover.Image.Save(path.Text & "mymovies-front.jpg", System.Drawing.Imaging.ImageFormat.Jpeg)
When i use the code above and chack the picture after save it shows me the "x" picture just before the picture is loaded i have had a look at picture.waitonload
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Apr 3, 2009
I've written a simple application to encrypt an image (jpeg file) based on a password as a challenge to a mate of mine who reckons he's an ace hacker.I can encrypt the image no problem but when I try to save it using
[Code]...
I get "a generic error occurred in GDI+" raised. Googling reveals a few hits for this problem but seemingly mostly related to using databases rather than the file system.
Has anyone come across this? I don't want to paste all my code here in case my nemesis is watching, however basically I'm getting a reference to the PictureBox's Image property and manipulating the pixels using GetPixel and SetPixel, and then setting the picturebox's image property = my modified bitmap.
I understand that the error is generally related to the bitmap not being ready to be saved - is there anything specific I need to do to "close" the bitmap so it can be saved?The strange thing is that I'm sure this was working earlier today and now seems to have arbitrarily stopped working.
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