Hi,
Thanks in advance.
I need help(Tutorials or online links) regarding storing and retrieval of files in Sql server (BLOB) using ASP.net and C#.
Secondly,Is it possible to search file in BLOB using SQL server Full text search service.
Can somebody pls guide me on how i can Store & Retrieve Encrypted Username and Password Hashes.
I want to know following :-
1. I'm doing all the encryption and calculating password hashes on client side (VB), which i want to store in SQL Database when a new user account is created. I want to know what data types to use in Database. I will prefer not to use strings at all on client side due to secruity issues, i want to do all transfer in bytes -> to and from SQL server. How i can do that
2. How the connections can be made encrypted or more secure when doing these communcations.
3. I want to know if this is the right approach or to use the built in features of SQL Server 2005, main reason for not using that is that not all Encryption and Cryptography are supported...
pls help me on this as i'm fairly new to this.
Can you guys give me any specific classes I should read about to implement the above? Any specific methods?
Any webpage I should read?
Thanks for your direction/help!
Which is better, to store the files onto the server's folders or to a database?
I tried storing to MSSQL 2000 but the varbinary does not allow me to set "MAX" for the data type.
Hi,I was wondering what anybodies feelings on storing images and files in SQL server express 2005?I am guessing it is a No No...If this is the case what are the best practices for achieving this?Would something like a table which held the "real name of the file", "a unique identifier" do the trick...hence in code (c#) i could create a GUID for the unique identifier maybe??? and then upload the pictue or file to a common directory and name it with the unique identifier rather than its real name.This means that i could potentially hold a different file with the same name i.e. no conflictsMy app is a sort of HTML editor in asp.net (all html is stored in the db) so if i do upload a picture using a GUID or uniquee identifier then if somebody saves teh image from a webpage then it would be called uniqueIdentifier.jpg which is probably what i don't want.So the only other idea i had was to create a directroy within my site which I would name with the unique identifier and upload the pics and files with thier real names into this directory. Hence each document would have its own directory so there would be no conflicts with filenamesAny advice or comments really appreciatedThanks in advanceIan
View 3 Replies View RelatedI have a table that I'm inserting a file into and using the Image data type to store the binary object. Now the code below works fine for files around 1.5 MB, but anything larger and it's like the code won't even execute and I get a Page Not found error.
I'm in the process of running some traces to find out what's going on in the backend, but I'm assuming there's something amiss with my code. The Image data type should handle files that size with no problem but for some reason it isn't.
Does anyone see anything wrong?
Thanks
Dim iLength As Integer = CType(File1.PostedFile.InputStream.Length, Integer)
If iLength = 0 Then Exit Sub 'not a valid file
Dim sContentType As String = File1.PostedFile.ContentType
Dim sFileName As String, i As Integer
Dim bytContent As Byte()
ReDim bytContent(iLength) 'byte array, set to file size
'strip the path off the filename
i = InStrRev(File1.PostedFile.FileName.Trim, "")
If i = 0 Then
sFileName = File1.PostedFile.FileName.Trim
Else
sFileName = Right(File1.PostedFile.FileName.Trim, Len(File1.PostedFile.FileName.Trim) - i)
End If
conn = New SqlConnection(eco)
conn.Open()
cmd = New SqlCommand("INSERT INTO ECO_Attachments (ECOID, FromType, DocName,OldRev,NewRev,NtLogin,DisplayName, FileName, FileSize, FileData, ContentType) VALUES (@ECOID, @FromType,@DocName,@OldRev,@NewRev,@NtLogin,@DisplayName, @FileName, @FileSize, @FileData, @ContentType) ")
cmd.Connection = conn
Try
File1.PostedFile.InputStream.Read(bytContent, 0, iLength)
With cmd
.Parameters.Add("@ECOID", SqlDbType.Int)
.Parameters.Add("@FromType", SqlDbType.NVarChar, 50)
.Parameters.Add("@DocName", SqlDbType.NVarChar, 250)
.Parameters.Add("@OldRev", SqlDbType.NVarChar, 50)
.Parameters.Add("@NewRev", SqlDbType.NVarChar, 50)
.Parameters.Add("@NTLogin", SqlDbType.NVarChar, 100)
.Parameters.Add("@DisplayName", SqlDbType.NVarChar, 200)
.Parameters.Add("@FileName", SqlDbType.NVarChar, 255)
.Parameters.Add("@FileSize", SqlDbType.Real)
.Parameters.Add("@FileData", SqlDbType.Image)
.Parameters.Add("@ContentType", SqlDbType.NVarChar, 50)
.Parameters("@ECOID").Value = ECOID
.Parameters("@FromType").Value = From
.Parameters("@DocName").Value = DocName
.Parameters("@OldRev").Value = OldRev
.Parameters("@NewRev").Value = NewRev
.Parameters("@NTLogin").Value = NTLogon
.Parameters("@DisplayName").Value = DisplayName
.Parameters("@FileName").Value = sFileName
.Parameters("@FileSize").Value = iLength
.Parameters("@FileData").Value = bytContent
.Parameters("@ContentType").Value = sContentType
.ExecuteNonQuery()
'.ExecuteScalar()
End With
Catch ex As Exception
Response.Write(ex)
'Handle your database error here
conn.Close()
End Try
Hi There,
Can I store flash files in the database. I have a table with one of the columns as varbinary datatype. Previously, I was saving images (as filebytes) into this column. But now I need to implement something to store the flash file. So, is it possible to store flash files in the database and retrieve them and display them in an asp.net page?
Thanks a lot for your suggestion!!
Hello,
Please help me find solution to these questions?
1. How do I store audio and video files in sql server 2000.
2. Is it possible to store and retrieve audio and video files using t-sql
3. Which is the most efficient way to store and retrieve audio and video files in sql server
Your suggestions are most valued.
Thanks!
Hi,
can we keep a file like word file or html file in the sql server database?
if yes, then can we search any thing in these stored file?
regards
mihir
Hi
Can anyone tell me how to store animage file into database?
Thanks
Peter
Is there any way to store a binary or image file into a database record / save a binary or image record back into a file using Transact SQL? If yes, would the "image" data type be most suitable?
(As a background, I am working on a process that deals with incomign emails, and I am using SQL Mail for that purpose. The above is needed to deal with attachments that may come with emails, and which are saved in a physical file on the HDD).
Thanks a lot in advance...
What are the negatives, challenges and issues going to be if we choose to store 300-1000 GB worth of image, xml and PDF files (avg size 1 mb) in SQL server 2005 db.
View 1 Replies View RelatedWhat is the best way to store 100 of thousands of .jiff files (<5 MB each) to be used (creating and retreiving) in .net c# new application using sqlserver db.
We will also need to migrate existing files working with old VB application to .net c# application
So the next question will be to: what is the best way to migrate these files into new db/system
Please advice.
Thanks
Hey I currently have a foreach loop container working which scans a folder, loops through the files in this folder and then moves them to a new folder.
At the same time I also do an SQL insert into a table logging the details of the transfer.
What I would like to do next is to store the actual PDF in binary in my DB (varbinary format). How would I go about this ?
how can i stored audio file in Sql Server, so that i can loop my web page to fill the table with a link to download the audio. What will be the best way to achieve that.
View 1 Replies View RelatedHi folks,Is it possible to store Binary Files in MS SQL 2000 ??? Say I have a100K PDF or a 150K word document. Is it possible to store this in afield in MS SQL and pull it out somehow? We're using ColdFusion on theserver on Apache.Thanks,Ringo
View 3 Replies View RelatedHi There,
I am new to VC# and SQL Express. I am currently trying to find a way to store user selected files into SQL Express. I am using a column with the varbinary(MAX) data type. My current thought is to give the user a open file dialog box, and let them select the file they want to upload. On closing this dialog box, I convert the file selected into a file stream and insert into SQL Express.
Is this method a good one? If anyone else can give me pointers or hints to better methods, please do!
Thanks,
Ke
Hey everyone,
I'm deploying a desktop application with Sql CE 3.5. I have a collection of files that I would like to be save as a binary format in SQL CE. These files range from 1KB to 5MB. I know I cannot use varbinary(max) , instead I am limited to varbinary(8000), but this obvisously comes short of 5MB. There are articles stating to use the image datatype to get around this. Is this just bad practice, should I keep the files on the file system or take advantage of this work around? Do you have any suggestions?
Thanks in advance,
-- Chris
Hello,I'm looking for a tutorial or some sample code to save a file in sql server with c#. So far I have not been able to find a anything I could use as most tutorials are in VB. I'm using the varbinary max type to store the file. The part I need help with is selecting the file and converting it using the Stream object, not the SQL insert statements. Thanks,Arnold
View 3 Replies View RelatedI did some quick Googling and didn't find the article of my dreams here. Any experience with storing files in the db in 2005? Any opinions?
Here's the deal. We have our new 'Enterprise' software being designed and written in St. Petersburg (not FL) and I'm reviewing the design for dealing with letters and forms that are generated as hard copy from our business (by the thousands per month) and sent to clients for review, signature etc. Then they are returned by fax or snail mail.
The current design has all of these being stored in image data type columns in the database--storing saved files of the actual outgoing stuff and saved files of the stuff that comes in (scanned copies or the files from our fax server).
This screams 'BAD IDEA' based on our experience doing this in SQL Server 2000. We get things like 23 page faxes from Dr's offices, large packets of FMLA forms returned, etc. In 2000 they tended to get rather large when stored in the DB and caused us all kinds of headaches when Microsoft changed how it recognized and displayed certain types of files, e.g. tiffs.
Further, the outgoing stuff is largely boilerplate with added fields from the db--name, address, a few dates. My proposed design for outbound notifications and forms was to keep only references to the template used, the date created, and an id to link it to the personal info of the schmoe to whom it was sent--essentially, store which document template and then just enough data to map to the variable content that is pulled from the db. Then you can recreate the file that was printed and mailed at any time in the future, but you don't actually save the .doc (or Word .xml) anywhere, not in the file system, not in the db.
The current developers feel this is way too much work to design--and it is certainly more effort than just generating .docs/.xml files via a merge with Word and then stuffing those into the database. They also argue that having them in the db makes them 'more secure' and more 'accessible' to users around the globe.
Does anyone know if the image storage is any better in 2005 than 2000? The .docs & .tifs we used to store just about tripled in size when we put them in the db in 2000. Plus there were the defrag issues and generally it was an unsatisfying experience.
Does anyone know what the advantages/disadvantages of generating Word .xml files might be? Can they be stored as xml data type in SQL Server? Perhaps this is a better option?
If anyone has the time to digest this, please send opinions.
Thanks!
i need to store a bmp or zipped file in a field of a ms sql db. i read the file using vb6 o.net, and in my mind i think sto store it in binary mode. the files could be more of 12 mega. whitch kind of field a could use?
View 1 Replies View RelatedI'm building a system when one can upload a document to the website.I will be storing the document on the hard-drive for quick/easy access,but I was also thinking of storing it in an existing database since mostof the sites information is all stored there.As well there would be only one place to worry about backing up. And ifthe file on the hard-drive was ever missing or became corrupted, I couldrestore it form tha database. Is this feasable? Has anyone ever done this?--* Don VaillancourtDirector of Software Development**WEB IMPACT INC.*phone: 416-815-2000 ext. 245fax: 416-815-2001email: Join Bytes! <mailto:donv@webimpact.com>web: http://www.web-impact.com/ This email message is intended only for the addressee(s)and contains information that may be confidential and/orcopyright. If you are not the intended recipient pleasenotify the sender by reply email and immediately deletethis email. Use, disclosure or reproduction of this emailby anyone other than the intended recipient(s) is strictlyprohibited. No representation is made that this email orany attachments are free of viruses. Virus scanning isrecommended and is the responsibility of the recipient./
View 5 Replies View RelatedHello --
I'm building an app that will allow users to create their own photo galleries. At this point, I'm planning on storing all photos as byte arrays in SQL server image fields.
Besides the organizational benefit, is there a space benefit to doing this? That is, if I have 1MB of .jpg's, will those same images take up less than 1MB of file space within the database?
One of the reasons I ask is that most hosting plans out there seem to offer more "normal" disk space than is allocated for the database, so I'm trying to make a best plan to accommodate what will probably end up being the biggest disk space consumer in my app (the photos, that is).
Any other recommendations re: this scenario (hosting, best practices) are appreciated.
TIA,
Eric
Hi,
I wanted to retrieve all the databases present in an SQL Server and put them in an Dropdown list.
Then retrieve all tables of the selected database
and finally retrieve all data from the selected table (This i know)
How do i accomplish the above two.
Regards
Vijay R
How can i retrieve duplicate rows and show in sql server 7.0.
It is very urgent.
regards,
Srinivas.
Hello,
i am getting a hard time in minimizing time for data retrieval, over SQL Server DataBase. My DataBase consist of 2 tables. One of the table has more than 10000 entries and other table with more than 10 million entries. I have used SQLNative Client for connecting to data base and my goal was to find a value from the 1st table and search it out in 2nd table. The result is more than hundered thousand rows. Now the problem is: the time it took for retrieving those rows is much slower approx. 12 minutes. Can this time be cut down. I have used SQLClient connection to make sure it is accessing SQL server on a direct access base.
Also, i am using
SqlClient::SqlDataReader
for reading, getting rows returned by the my query.
Please help me out.
Thanx.
R. T.
I live in Brazil, and use SQL Server 2000 SP4 with Visual Basic 5.0 SP3, with connectivity to ODBC through RDO/ADO.
I have an example table with the following structure:
Table Name: Autioneer's (translated from Portuguese)
'Field 1/3
Name: Code
DataType: int
Description: Auctioneer's Code
'Field 2/3
Name: Name
DataType: nvarchar(50)
Description: Auctioneer's Name
'Field 3/3
Name: RegNum
DataType: nvarchar(20)
Description: Auctioneer's Registration Number
I need a way to programatically extract the Fields Description Property from the table
example sintaxe:
SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME ='AUCTIONEERS'
Thanks for any help that can be offered here
Neil Ramkeerat.
Replies can be sent to neilramkeerat@hotmail.com
Hello there,I just want to ask if storing data in dbase is much better than storing it in the file system? Because for one, i am currenlty developing my thesis which uploads a blob.doc file to a web server (currently i'm using the localhost of ASP.NET) then retrieves it from the local hostAlso i want to know if im right at this, the localhost of ASP.NET is the same as the one of a natural web server on the net? Because i'm just thinking of uploading and downloading the files from a web server. Although our thesis defense didn't require us to really upload it on the net, we were advised to use a localhost on our PC's. I'll be just using my local server Is it ok to just use a web server for storing files than a database?
View 6 Replies View RelatedHi gurus,
I've created a linked server (and set up the corresponding schema.ini file) in order to perform bulk-inserts from some CSV text files into SQL tables (from my standpoint the text files are just for reading purposes). The linked server works fine (I can select the data in the files without a problem).
Now the question: is possible to automatically detect when one or more of those files change in order to start the import process automatically? Something like having a trigger created on the CSV files Or there's no easy way to do that so I have, to say something, to create a Job that periodically checks if the files have changed programatically (say, recording each file's timestamp everytime is imported and comparing the recorded value with the current one, or whatever)?
Thanks a lot in advance!
i m having a huge problem! how to retrieve data from notepad files using asp.net and store the info in fields in MS-Access/Sql db? Plz help !!
View 1 Replies View RelatedI have a table of vehicle usage records with fields including vehicle number, driver, date/time, starting odo, ending odo. I'm looking to compare the starting odo of a given record to the ending odo of the last time that vehicle was used. I also need to return other fields from that previous record, like the date/time and driver.My users basically run a report for any given day, and the vehicles used on that day need to be compared to their most recent usage (most recent relative to the record at hand). This is to ensure that the vehicle hasn't been used in the interim and not recorded (which may indicate theft).I've got a very convoluted process in place, but I'd like to see if it can be streamlined. The current process is done in Access and has a number of queries built on other queries. It is very slow. The data is in SQL Server. Any thoughts on the best ways to accomplish this?TIA
View 4 Replies View RelatedHi there,
Is there a way to retrieve the set of primary keys from an inserted record, especially when the primary keys are generated upon insertion (ex. identity, uniqueid)? Basically I need to get the ID of the record I just inserted so that I can use it as a reference to that record in other places.
I'm using MS SQL and raw SQL commands (ie. no database interfacing objects). I'm hoping I can tag some sort of SELECT statement on the end of the INSERT command that will give me the results that I need.
Thanks!
Hi all, I dont know if anyone here can help me...I am using ASP.NEt with VB.Net and SQL Sever...What I am trying to do is create a system whereby it allows users to upload images into sql server, and thereon later retireve this image.I used a book called The Ultimate VB.Net and ASP.Net Code Book, and it basically gave me the code below to upload and retrieve images. I seem to have managed to allow the uploading of images, with them being stored as <byte> in my database, thought I have no idea how to retrieve them...Does anyone have any ideas???Here is the code I followed.. :"Storing Uploaded Files in Your Database First, a few tips on storing files inside your SQL Server database.For convenience, you’ll really need to store at least three bits of information about your file to get it out in the same shape as you put it in. I’d suggest “data� (a field that will hold your actual file as a byte array, data type “image�), “type� (a field to hold details of the type of file it is, data type “varchar�), and “length� (a field to hold the length in bytes of your file, data type “int�). I’d also recommend “downloadName�, a field to hold the name that the file had when it was uploaded, data type “varchar�. This helps suggest a name should the file be downloaded again via the Web.The problem you have is translating the information from the File Field control into an acceptable format for your database. For a start, you need to get your file into a byte array to store it in an image field. You also need to extract the file type, length, and the download name. Once you have this, set your fields to these values using regular ADO.NET code.So, how do you get this information? It’s simple: just use the following ready-to-run code snippets, passing in your File Field control as an argument. Each function will return just the information you want to feed straight into your database, from a byte array for the image field to a string for the file type.Public Function GetByteArrayFromFileField( _ ByVal FileField As System.Web.UI.HtmlControls.HtmlInputFile) _ As Byte() ' Returns a byte array from the passed ' file field controls file Dim intFileLength As Integer, bytData() As Byte Dim objStream As System.IO.Stream If FileFieldSelected(FileField) Then intFileLength = FileField.PostedFile.ContentLength ReDim bytData(intFileLength) objStream = FileField.PostedFile.InputStream objStream.Read(bytData, 0, intFileLength) Return bytData End If End Function Public Function FileFieldType(ByVal FileField As _ System.Web.UI.HtmlControls.HtmlInputFile) As String ' Returns the type of the posted file If Not FileField.PostedFile Is Nothing Then _ Return FileField.PostedFile.ContentType End Function Public Function FileFieldLength(ByVal FileField As _ System.Web.UI.HtmlControls.HtmlInputFile) As Integer ' Returns the length of the posted file If Not FileField.PostedFile Is Nothing Then _ Return FileField.PostedFile.ContentLength End Function Public Function FileFieldFilename(ByVal FileField As _ System.Web.UI.HtmlControls.HtmlInputFile) As String ' Returns the core filename of the posted file If Not FileField.PostedFile Is Nothing Then _ Return Replace(FileField.PostedFile.FileName, _ StrReverse(Mid(StrReverse(FileField.PostedFile.FileName), _ InStr(1, StrReverse(FileField.PostedFile.FileName), ""))), "") End Function Sorted! One question remains, however. Once you’ve got a file inside a database, how do you serve it back up to a user? First, get the data back out of SQL Server using regular ADO.NET code. After that? Well, here’s a handy function that’ll do all the hard work for you. Simply pass the data from your table fields and hey presto:Public Sub DeliverFile(ByVal Page As System.Web.UI.Page, _ ByVal Data() As Byte, ByVal Type As String, _ ByVal Length As Integer, _ Optional ByVal DownloadFileName As String = "") ' Delivers a file, such as an image or PDF file, ' back through the Response object ' Sample usage from within an ASP.NET page: ' - DeliverFile(Me, bytFile(), strType, intLength, "MyImage.bmp") With Page.Response .Clear() .ContentType = Type If DownloadFileName <> "" Then Page.Response.AddHeader("content-disposition", _ "filename=" & DownloadFileName) End If .OutputStream.Write(Data, 0, Length) .End() End With End Sub Simply pass your byte array, file type, and length, and it’ll send it straight down to your surfer. If it’s an image, it’ll be displayed in the browser window. If it’s a regular file, you’ll be prompted for download.If it’s made available for download, this function also allows you to specify a suggested download file name, a technique that many ASP.NET developers spend weeks trying to figure out. Easy! Working with Uploaded Images Whether you’re building the simplest of photo album Web sites or a fully fledged content management system, the ability to work with uploaded images is a vital one, and with ASP.NET, it’s a real doddle.The following code snippet shows you how, by example. It takes a data stream from the File Field control and converts it into an image object, adding simple error handling should the uploaded file not actually be an image. The code then uses this image object to extract a few core details about the file, from its dimensions to file type:' Get data into image format Dim objStream As System.IO.Stream = _ MyFileField.PostedFile.InputStream Dim objImage As System.Drawing.Image Try ' Get the image stream objImage = System.Drawing.Image.FromStream(objStream) Catch ' This is not an image, exit the method (presuming code is in one!) Exit Sub End Try ' Filename Dim strOriginalFilename As String = MyFileField.PostedFile.FileName ' Type of image Dim strImageType If objImage.RawFormat.Equals(objImage.RawFormat.Gif) Then strImageType = "This is a GIF image" ElseIf objImage.RawFormat.Equals(objImage.RawFormat.Bmp) Then strImageType = "This is a Bitmap image" ElseIf objImage.RawFormat.Equals(objImage.RawFormat.Jpeg) Then strImageType = "This is a JPEG image" ElseIf objImage.RawFormat.Equals(objImage.RawFormat.Icon) Then strImageType = "This is an icon file" ElseIf objImage.RawFormat.Equals(objImage.RawFormat.Tiff) Then strImageType = "This is a TIFF file" Else strImageType = "Other" End If ' Dimensions Dim strDimensions As String strDimensions = "Width in pixels: " & objImage.Width & _ ", Height in pixels: " & objImage.Height ' Send raw output to browser Response.Clear() Response.Write(strOriginalFilename & "<p>" & strImageType & _ "<p>" & strDimensions) Response.End() "For some reason the retrieval code isnt working for me..Can anyone provide any help? even if it means using another method?
View 1 Replies View Related