Writing Binary Data To Database Only To Refrence A File Location?
Sep 29, 2006
Hey everyone I've got this question that has me stuck for the last few days but its an important part of my website.....What I am trying to do is basicly have a user be able to upload a file, have that uploaded file plus some other info automaticly display on other parts of my site, and have a different user eventually be able to download that file....
I have thought about allowing the file upload as a BLOB but still cannot find a proper way to execute this using VB, plus I have heard that this way of doing it is not reccommeneded cause databases were not designed to store large files like this, lots of articles recommened having the file upload to a Folder on your server then get the binary data for the file that can be placed in a database to refrence that particular file.....Well this also proves to be a lot harder then said here is what I got so far (written in C#) protected void UploadBtn_Click(object sender, EventArgs e)
{
if (FileUpLoad1.HasFile)
{
FileUpLoad1.SaveAs(@"C:Documents and SettingsAdamMy DocumentsVisual Studio 2005ProjectsWebsiteFiles" + FileUpLoad1.FileName);
Label1.Text = "File Uploaded: " + FileUpLoad1.FileName;
}
else
{
Label1.Text = "No File Uploaded.";
}
}
and here is the asp part of the code that goes with it<asp:FileUpLoad id="FileUpLoad1" runat="server" />
<asp:Button id="UploadBtn" Text="Upload File" OnClick="UploadBtn_Click" runat="server" Width="105px" />
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
Now from what I know is I need to get the binary of the file which I have read you can do with the Page.Request.Files statement but again not sure how I would impliment this. Does anyone have any suggestions on which way I should take when dealing with this should I try and just use the BLOB method or use the binary refrence method? and if so how would I impliment this, heck even some good tutorials on the subject would be great... Thanks.....Adam
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Jul 8, 2013
Iam trying to crate a job, that writes the result set on text file and export to location like "abcxyz.txt"
job succeeds but i cant see any thing written on the file and i have given the same path in the job path option.
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Mar 15, 2007
Hey all, WE have a document management system where by Adminstrators can upload documents, once the document is uploaded the binary data is stored on in a folder on the web server. We used to stored the documents in the actaul db table, but we found that there were to many documents and it was using alot of space on db server. So my boss has decided we are now going to upload the binary data onto the web server. Currently we are donig this with new documents which have been added or documents which are gettinguploaded when reloading, but there are many documents in the db table which have not been updated and are still embedded in the db table. So i need to figure out how to go about copying the data storewd in the db table and storing it in web servers folder location. I've tried various things for a enitre day but im going round in circiles. MemoryStream mStream = new MemoryStream((Byte[])dtrResults["file"]); BinaryReader bReader = new BinaryReader(mStream); int intFileSize = (int)mStream.Length; Byte[] byteFile = (Byte[])dtrResults["file"]; i can get to this state but then how do i create a folder on the BinaryREader to then store the binary data of the file to the location. BinaryReader bReader2 = new BinaryReader(File.Open(strDocFolder + strSavedFileName, FileMode.Create)); int count2 = bReader2.Read(byteFile, 0, intFileSize); bReader2.Close();i've also tried this but when the file gets created in the folder there is no content. i do know that the file does contain content as ive tried this and downlaoding the file from that page acctually works string strContentTpe = WValue.WStr(dtrResults["contenttype"]); int intFileSize = VValue.VInt(dtrResults["filesize"]); / Byte[] byteFile = ((Byte[])dtrResults["file"]); //Downloads the data correctly Response.ClearContent(); Response.ClearHeaders(); Response.AddHeader("Content-Disposition", "attachment; filename="" + WValue.WStr(dtrResults["docfilename"]) + """); Response.AddHeader("Content-Length", WValue.WStr(intFileSize)); Response.ContentType = strContentTpe; Response.BinaryWrite(byteFile); I hope ive made some snese andthat someone can hlep me. Have a nice dayZal
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Sep 9, 2004
I'm trying to read a byte array of an image datatype from sql server, and then to put this in another field in the database. I get a byte array, but somehow the image doesn't get into the db well with the sql parameters. Does anyone have an idea how to tackle this problem?
Thanks a lot, Hugo
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Mar 9, 2006
First of all let me say that ASP.NET a new programming environment for me so please forgive my ignorance.
Can someone please tell me how to write data to a SQL table that is a Binary data type? I have a stored procedure on the SQL server that I am calling to insert data into a table. I build a parameter list and set the values. It worked just fine before I added a binary field to the SQL table. My problem is that I don't know how to set the Binay data type to pass it to the stored procedure. Here is part of the code:
GetCMD = Myconnection.CreateCommand
GetCMD.CommandType = CommandType.StoredProcedure
GetCMD.CommandText = "SCHEMANAME.InsertLineItem"
GetCMD.Parameters.Add("HEADER_ID", SqlDbType.VarChar, 150)
GetCMD.Parameters("HEADER_ID").Value = "some value"
GetCMD.Parameters.Add("@OPTIONS", SqlDbType.Binary)
GetCMD.Parameters("@OPTIONS").Value = HOW DO I SET THIS VALUE????
rowsaffected = GetCMD.ExecuteNonQuery()
I assume serialization but have not figured out how. Anyone's help is greatly appreciated!!
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Feb 16, 2008
Hi Guys
In my project I need to write the data from an xml file to Database through a stored precedure.
On line a lot of help is available for writing data from Database to xml but I didnt see much info
about writing xml to database.
If any one could give me some code I will really appreciate it.(I am a newbee).
This application is developed using asp.net 1.1 and sql server 2005.
Thanks for your help in advance.
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Sep 2, 2007
Greetings, I have just arrived back into the country (NZ) and back into ASP.NET.
I am having trouble with the following:An attempt to attach an auto-named database for file (file location).../Database.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
It has only begun since i decided i wanted to use IIS, I realise VWD comes with its own localhost, but since it is only temporary, i wanted a permanent shortcut on my desktop to link to my intranet page.
Anyone have any ideas why i am getting the above error? have searched many places on the internet and not getting any closer.
Cheers ~ J
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Nov 2, 2013
I'm working on a report to show financial transactions from a table over a certain period. For most transactions there is a PDF document that is stored in a separate table in a binairy format. In my report I would like to include a link on every line with transaction information in the report that opens the PDF that is linked to that transaction. Just to be clear, I don't want to embed the PDF in the report but I want the users of the report to have the option to view the PDF that is related to that transaction in their standard pdf reader (adobe).
Code to do the following:
Once a user clicks on the link to view the PDF I need the code to get the binairy data of the PDF file from the table, convert it back to a PDF and open it in the default pdf reader (for example adobe reader). If it can't directly open the file then it's maybe possible to activate the 'open or download' pop up that you also get when you download something from a website.Â
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Mar 8, 2015
I had to to relocate the database log file and I issued an Alter database command but by mistake I put a space in the file name as below. The space is at the beginning file name. Now I am unable get the database loaded to SQL Server. The database has 2 replications configured, so deleting and re-attaching the database means the replication needs to be re-configured. Is there an alternative way to issue a command to update the database FILENAME ? Not sure if this can be edited in master database (sys files).
ALTER DATABASE [User_DB]
MODIFY FILE (NAME = User_DB_log, FILENAME = 'I:SQLLogs User_DB_log.ldf')
GO
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Dec 22, 2006
I can install the SQL Server Express in a computer and locate the database files in another computer of the same local network?
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May 17, 2007
Hi, I am working on a new installation which I did not set up and realized was using the wrong partition of the server to store the data and log files, I have already created several databases, I want to use another partition for these databases without having to drop them and create them all over again.
In BOLine i saw this command but want to make sure its safe, hope somebody can comment on this or if I am missing something.thank you
proposed command:
"MODIFY FILE ( NAME = logical_file_name, FILENAME = 'new_path/os_file_name ' )"
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Feb 27, 2007
During installation of SQL Server 2000 I set the default location for data files as D:MySQLServer which resulted in the location D:MySQLServerMSSQL.
I then installed SQL Server 2005. I do not remember being given the option of specifying location for the Data Files. Then I read that the location for named instances is deteremined by the first installation of SQL Server. The location for the data files for SQL Server 2005 turned out to be MSSQL.1 but under C:Program Files.....
I want the default location for SQL Server 2005 to be under D:MySQLServer, something like D:MySQLServerMSSQL.1. How do I do I change the default location for the Data Files.
Jay
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Nov 22, 2004
Halo, I am a bit new to this
Please can someone help me, I would like to write a file(Any type) to a SQL database like a attached document(s) for the current record and be able to detatch the document when needed.
I use VB.NET for a ASP.NET app.
I basicly would like to attach documents to a piece of equipment may it be any kind and if the user views the equipment he will be able to detatch the documents for that piece of equipment and open it with the correct software.
PLEASE HELP!!!!!!!
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Nov 26, 2007
I'm trying to do this: ------------------------------------- 1) Have SQL server return some data from this simple stored procedure. It returns XML: SELECT * FROM eAccessTypes FOR XML AUTO ------------------------------------- 2) In my C# I capture the return value in an XmlReader like so: XmlReader xmlr = mySqlCommand.ExecuteXmlReader();
After this i want to write the xmlr data to a file.
Any ideas
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Nov 6, 2006
hello dear friends
I am trying to save a binary file to database with the following code:
public static void memorystreamToDb()
{
MemoryStream mst = new MemoryStream();
UnicodeEncoding u = new UnicodeEncoding();
string Textn = "Test";
byte[] b = u.GetBytes(Textn);
mst.Write(b ,0,Textn.Length );
BinaryReader reader = new BinaryReader(mst);
byte[] file = reader.ReadBytes((int)mst.Length);
using (SqlConnection connection = new SqlConnection("Some Connection String"))
{
SqlCommand command = new SqlCommand("INSERT INTO temp (examplefile) Values(@File)", connection);
command.Parameters.Add("@File", SqlDbType.Binary, file.Length).Value = file;
connection.Open();
command.ExecuteNonQuery();
}
reader.Close();
mst.Close();
}
or with the other method from a real file (not memory stream)
public static void Addfile(string path)
{
CommonMethods_class k = new CommonMethods_class();
byte[] file = GetFile(path);
using (SqlConnection connection = new SqlConnection(k.Get_connection_string()))
{
SqlCommand command = new SqlCommand("INSERT INTO temp (examplefile) Values(@File)", connection);
command.Parameters.Add("@File", SqlDbType.Binary, file.Length).Value = file;
connection.Open();
command.ExecuteNonQuery();
}
}
and after running each of them seams that the file have been saved; but I can not retrive the files. I have tried some solutions from msdn but inside the created file is empty. the point that i really look for it is to just working with memory not in the disk before saving. and then retriving each field that I want.
looking forward your points
thank you in advance
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Apr 13, 2005
Hello all,
I am exporting data from AS/400 into an xml file and then importing the data from the xml file into an SQL database. I am getting the error: "The statement has been terminated. String or binary data would be truncated" when there are characters like "," or "&" in the xml. How can i solve this problem? Almost all my records have characters like that because they include comments and i can't disallow the users from entering these characters (especially ",").
Thanks,Mike.
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Nov 9, 2015
I added a secondary data file to TEMPdb yesterday and gave it a wrong location by mistake. If I try to change the location, then I am getting an error now. I think that is because TEMPdb is in use and that is why I cant change it's secondary file's location. Do I need to take TempDB offline and then change the secondary file's location??
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Jul 20, 2005
I need to just back one table and not all the data in the table. Is there away to have SQL save the data return from a query to some text file that Ican then use to build the table in another table on another server?I am SQL server 7Thanks,S
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Oct 17, 2007
Hello,
Is there any ability to do database-level triggers in SQL 2000? I have a SQL 2000 database, and I was asked if we could create a trigger that whenever anyone touches the data in a database, to create an entry in an event log? If not, I have a main table I can put a trigger on; however, my question is how do you write to a file in a trigger as well?
Thanks.
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Feb 21, 2007
Hi All,
I have seen some different behaviors when I am writing SQL Server compact edition Database file into SD Memory card or any user removable storage media.
The following Steps for reproducing these behaviors.
1. Set your database location is in the SD Memory card.
2. Create a database and establish session.
3. Writing first record into the database is done
4. Remove your SD card manually from the system
5. Try to write a Second record into the database
6. You will get the error from this "SqlCeWriteRecordProps" API call - This is fine.
7. Put your SD card back into the system.
8. Writing Second record again into the database is done - This is fine.
So far the behaviors are good after that
9. Remove your SD card manually from the system again
10. Try to write a Third record into the database
11. You will suppose to get the error from this "SqlCeWriteRecordProps" API call but you won€™t get that error €“ I don€™t know why?
12. Then Try to write a Forth record into the database
13. You won't get any error from the API call "SqlCeWriteRecordProps" and return status is success.
14. Now put your SD card back into the system.
15. Then write Fifth record but this time its writing record Third, Fourth and Fifth into the database.
Note:
I am clearing (means Free) my record structure everything after calling this function "SqlCeWriteRecordProps". So I don€™t know why its wring Third, fourth and fifth record into the database.
Please Let me know your feedback.
Thanks,
Rajendran
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Jun 2, 2015
I have a well-structured but also very large binary data-set that is generated by a C++ application every five minutes. The data needs to be accessed by SQL applications. Since data is generated every five minutes, performance is key, both for write and read. The data set is about 500MB.If data is written to the file system, the write performance doesn't involve SQL server. For reading it, I have a CLR to read the portions of the data that I need based on offset and length. That works and is very fast. The problem is that data is stored in the file system, so it is not self-contained within the database.
A second option that I haven't explored yet, is to write the data into a table as VARBINARY(MAX). I would read the data using SUBSTRING with appropriate offset and length. Performance of SQL write/read of binary data of this size, and whether there is a third option I haven't thought off. I'm using SQL Server 2014.
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Sep 13, 2005
I have a package that contains three database tables (Header, detail and trailer record) each table is connected via a OLE DB source in SSIS. Each table varies in the amount of colums it holds and niether of the tables have the same field names. I need to transfer all data, from each table, in order, to a flat file destination.
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May 15, 2007
Hi All,
I am not sure whether this is the right place to post this question. But I am unable to figure out what is the best solution to retrieve and display an image in a html file(stored in varbinary(max) column). I have a list of images in the file and I am supposed to display them. Can anybody please let me know what is the best way to do this?
Thanks a lot!!
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Feb 14, 2008
Hi,
I have a data structure called 'Quote' which contains a number of different variables and controls ranging from text boxes, check boxes and radio buttons, i need to be able to read and write this from a database.
First I think a description of my overall project is needed:
Project Description
I have been given a brief that basically says: i have to create a programmed solution in VB to solve a problem. This problem can be anything we like, and I personally have chosen to create a program that manages quotes for building Log Cabins (this is very contrived and far from anything someone would do in the real world).
My solution will allow a generic user to create a quote (using a form with controls such as text boxes, check boxes, radio buttons) , and then save this to file. These users may then wish to load/edit this quote at a later date, from another form.
Whilst completing this project, i'll only have up to about 5 records (quotes) within the system, so i dont need the ability to store hundreds of records. And each record will be relatively short, with only about 10-15 data items within the data structure.
Also the Admin (or business owner in this case) need to be able to view all saved quotes in a presentable format, and edit them if needs be, from within this same program.
This solution does not need to be absolutely perfect and 100% efficiently coded, or have all the bells and whistles a real-world program would have. This is for an A level computing project by the way.
So basically, i need to be able to read from the database (to populate a Data Grid (i imagine this is best way?)) and so Admin can access any quote and edit it (editing is not vital, but viewing/printing is. Maybe i should stop at just viewing any quote?). Also i need generic users to be able to fill in the Edit Quote form and then save this data into the database.
And is a data structure really required for me to use a database?
I've never used databases in VB before (but have used them elsewhere, mainly Access) and so am completely new to this. Any help will be much appreciated.
Thanks
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May 7, 2015
I'm using a bit-wise comparison to effectively store multiple values in one column. However once the number of values increases it starts to become too big for a int data type.you also cannot perform a bitwise & on two binary datatypes. Is there a better way to store the binary data rather than int or binary?
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Nov 12, 2007
let's say I have a table named "myTable" in a SQL database:
UniqueID
FirstName
FamilyName
1
Elizabeth
Moore
2
Chris
Lee
2
Robert
McDonald's
I want to create a SQL query should contain a parameter for example:
SELECT * FROM myTable WHERE UniqueID = @TextBox OR FirstName = @TextBox OR FamilyName = @TextBox,
and when I type in my TextBox the ' * ' character, it should retrieve the whole table...
hope anybody understood, will be happy to explain more.
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Mar 14, 2007
I am finding that in order to have the Web Services Task work successfully the location of the WSDL file has to be on a local drive that SSIS is executing upon. Is the current intended behavior?
In my SSIS task I use a URL path to store information extracted from the Web Service. The information is stored on a different server than the one that SSIS is running upon. This works properly without error.
I have confirmed that SSIS has appropriate permissions to read/write to that directory on that server. When I attempt to reference the WSDL file (located in the same URL directory that I am saving the information) I get a web services error, 'The Web Services Name is empty, Verify that a valid web service name is available."
When I update the Web Service Task attribute to point to the WSDL file located on a local drive it works correctly. I have confirmed that both WSDL documents are exactly the same.
The behavior seems a little strange...so I must be missing something subtle.
...cordell...
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Mar 13, 2007
I'm sure I'm not the only one frustrated trying to figure out which log file SSRS writes to when an error occurs. Does anybody know a sure way to tell? It doesn't change the date/time of the date modified, so you can't sort by date in windows explorer. There seems to be no rhyme or reason to which file it writes to. For example, I had to go through 6 log files to find which one was being written to. I had thought (hoped) that it would always write to the log files with the latest embedded date/time stamp as part of the file name. It does not.
I'm tempted to start using a file system spy, or resort to other tactics. Does anyone have a sure fired way to see which log file is written to when an error occurs? I'm not talking about SQL Dump files - just "normal" errors when processing reports.
Thanks,
WillyDog
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Jun 3, 2008
Easy question, I hope We are setting up an active active sql cluster. The management have done everything the wrong way around and purchased the hardware already.
We are planning on having 2 databases 1 in each instance. We will place the transaction log files for each database on their own cluster "physical disk" resource. We only have 4 disks availalbe for the transaction log files. To make things a little more complicated I have been given no information on the expected transaction use other than they should be no larger than 50GB
Here are my options
1. 2 Mirrored raid arrays one for each sql instance
2. 1 Raid 10 array with 2 logical drives (so the transaction logs are sharing the same disk spindles)
What would you do? seperate the disk spindles or share them and go for fast disk performace.
Thanks in advanced
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Aug 5, 2004
Can someone firecct me to instructions on how to download a Binary file in a asp.net application.
I have a sql 2000 db that has a field that contains files and my users need access to them via my web app.
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Jul 11, 2002
Is the name of the most recent backup file for each database stored anywhere in SQL2K? I want execute a SQA job periodically that takes the BAK from database A and restores it over database B (using the T-SQL RESTORE DATABASE procedure), but I need to know the exact name of the .BAK file; i.e. I need to know the yyyymmddhhmm value at the end of that file.
TIA,
Al
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May 14, 2008
I've got some users that created a database with the log file on a drive that doesn't have a lot of space. I'd like to truncate the log and move it to a different drive. I can truncate it, but is moving it as easy as changing the files properties through SSMS?
Thanks
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Jul 18, 2007
version:SQL Server 2000.
db size: 25.6GB
trans log file: 32GB
so far: I have read the Forum FAQ on "clearing the transaction file" and some DBCC SHRINK in Books Online.
I am trying to set up maintenance plan or backup plan. File sizes are getting very large and performance is horrible since we have had no regular maintainence in the past (No DBA in house).
1. What is the best way to identify the location of the transaction log file associated with a particular database?
When I right-click on the database name in Enterprise Manager and select properties, I can see one location for the transaction log.
However, If I right-click on the database > All Tasks > Shrink Database > click Files and select Temp_Table_Log, I get a different location.
2. We delete then repopulate about 105000 records in one particular table each day. In addition, we do the same with about a hundred rows in several other tables daily.
-- Should I be doing Full Backups nightly?
-- I have the option set to "AutoShrink" on the db. Will this truncate and shrink the transaction log as well as shrink the db when I do a full backup?
Thanks,
Più pranzo libero!
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