Store Files In DB
Apr 26, 2004Hi All,
I want to store files (any kind of file) in DB and retrieve them.What is the best method to do it and also please post sample code as I have never done that.
Thanks,
Kumar.
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May 23, 2008I am almost done with a simple page to have a user select a file (using the FileUpload object), give it a short description and associate it with an item from a listbox. Thensave these pieces of data to a new row in a SQL DB.
My issue...
The SQLSmd.ExecuteNonQuery FAILS...
I have got all the fields able to connect and almost save... but for the actual "document" field errors out. The user can select any type of file (image, word, excel, Powerpoint, etc) for storage into the DB. I am not storing a referance to a file or the path to a file but the actual file in SQL.In the DB I have the field (Document) set to a type of VarBinary(8000) in the table. Here is thethe corrisponding code in my app...
Dim bArray As Byte...bArray = FileUpload1.PostedFile.InputStream.ReadByte()... SQLCmd.Parameters.Add("@Document", Data.SqlDbType.VarBinary, 8000).Value = bArray...iReturn = SQLCmd.ExecuteNonQuery()
ERRORThe first section of the stact trace...
[InvalidCastException: Invalid cast from 'System.Byte' to 'System.Byte[]'.] System.Convert.DefaultToType(IConvertible value, Type targetType, IFormatProvider provider) +867 System.Byte.System.IConvertible.ToType(Type type, IFormatProvider provider) +37 System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider) +408 System.Data.SqlClient.SqlParameter.CoerceValue(Object value, MetaType destinationType) +896
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Apr 30, 1999Hi all,
We've a requirement from our client for converting their paper documents
in electronic format. In order to do so, we need to know whether SQL Server
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format into the database?
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Hi, I'm a beginner with VB.NET and SQL and I would like to store files (like Images, Document...) in a Table of SQL but I have no idea how to do it.
This is my connection string, and examples of how I do queries, please help me...
Private cn As New SqlClient.SqlConnection
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like
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Msg 1823, Level 16, State 8, Line 1
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Apr 24, 2008In the first step of my SSIS package I need to get files from FTP and dump it/them in a local directory, but it's more than that, the logic is like this:
1. If no file(s) found, stop executing and send email saying no file(s) found;
2. If file(s) found, then compare it/them with existing files in our archive folder; if file(s) already exist in archive folder, stop executing and send email saying file(s) already existed, if file(s) not in archive folder yet, then transfer it/them to the local directory for processing.
I know i have to use a script task to do this and i did some research and found examples for each of the above 2 steps and not both combined, so that's why I need some help here to get the logic incorporated right.
Thanks for the help in advance and i apologize for the long lines of code!
example for step 1:
----------------------------------------------------------------------------------------------------------
' Microsoft SQL Server Integration Services Script Task
' Write scripts using Microsoft Visual Basic
' The ScriptMain class is the entry point of the Script Task.
Imports System
Imports System.Data
Imports System.Math
Imports Microsoft.SqlServer.Dts.Runtime
Imports Microsoft.SqlServer.Dts.Pipeline.Wrapper
Imports Microsoft.SqlServer.Dts.Runtime.Wrapper
Imports Microsoft.VisualBasic.FileIO.FileSystem
Imports System.IO.FileSystemInfo
Public Class ScriptMain
' The execution engine calls this method when the task executes.
' To access the object model, use the Dts object. Connections, variables, events,
' and logging features are available as static members of the Dts class.
' Before returning from this method, set the value of Dts.TaskResult to indicate success or failure.
'
' To open Code and Text Editor Help, press F1.
' To open Object Browser, press Ctrl+Alt+J.
Public Sub Main()
Dim cDataFileName As String
Dim cFileType As String
Dim cFileFlgVar As String
WriteVariable("SCFileFlg", False)
WriteVariable("OOFileFlg", False)
WriteVariable("INFileFlg", False)
WriteVariable("IAFileFlg", False)
WriteVariable("RCFileFlg", False)
cDataFileName = ReadVariable("DataFileName").ToString
cFileType = Left(Right(cDataFileName, 4), 2)
cFileFlgVar = cFileType.ToUpper + "FileFlg"
WriteVariable(cFileFlgVar, True)
Dts.TaskResult = Dts.Results.Success
End Sub
Private Sub WriteVariable(ByVal varName As String, ByVal varValue As Object)
Try
Dim vars As Variables
Dts.VariableDispenser.LockForWrite(varName)
Dts.VariableDispenser.GetVariables(vars)
Try
vars(varName).Value = varValue
Catch ex As Exception
Throw ex
Finally
vars.Unlock()
End Try
Catch ex As Exception
Throw ex
End Try
End Sub
Private Function ReadVariable(ByVal varName As String) As Object
Dim result As Object
Try
Dim vars As Variables
Dts.VariableDispenser.LockForRead(varName)
Dts.VariableDispenser.GetVariables(vars)
Try
result = vars(varName).Value
Catch ex As Exception
Throw ex
Finally
vars.Unlock()
End Try
Catch ex As Exception
Throw ex
End Try
Return result
End Function
End Class
example for step 2:
-------------------------------------------------------------------------------------------------------
' Microsoft SQL Server Integration Services Script Task
' Write scripts using Microsoft Visual Basic
' The ScriptMain class is the entry point of the Script Task.
Imports System
Imports System.Data
Imports System.Math
Imports Microsoft.SqlServer.Dts.Runtime
Public Class ScriptMain
' The execution engine calls this method when the task executes.
' To access the object model, use the Dts object. Connections, variables, events,
' and logging features are available as static members of the Dts class.
' Before returning from this method, set the value of Dts.TaskResult to indicate success or failure.
'
' To open Code and Text Editor Help, press F1.
' To open Object Browser, press Ctrl+Alt+J.
Public Sub Main()
Try
'Create the connection to the ftp server
Dim cm As ConnectionManager = Dts.Connections.Add("FTP")
'Set the properties like username & password
cm.Properties("ServerName").SetValue(cm, "ftp.name.com")
cm.Properties("ServerUserName").SetValue(cm, "username")
cm.Properties("ServerPassword").SetValue(cm, "password")
cm.Properties("ServerPort").SetValue(cm, "21")
cm.Properties("Timeout").SetValue(cm, "0") 'The 0 setting will make it not timeout
cm.Properties("ChunkSize").SetValue(cm, "1000") '1000 kb
cm.Properties("Retries").SetValue(cm, "1")
'create the FTP object that sends the files and pass it the connection created above.
Dim ftp As FtpClientConnection = New FtpClientConnection(cm.AcquireConnection(Nothing))
'Connects to the ftp server
ftp.Connect()
'ftp.SetWorkingDirectory("..")
ftp.SetWorkingDirectory("directoryname")
Dim folderNames() As String
Dim fileNames() As String
ftp.GetListing(folderNames, fileNames)
Dim maxname As String = ""
For Each filename As String In fileNames
' whatever operation you need to do to find the correct file...
Next
Dim files(0) As String
files(0) = maxname
ftp.ReceiveFiles(files, "C: emp", True, True)
' Close the ftp connection
ftp.Close()
'Set the filename you retreive for use in data flow
Dts.Variables.Item("FILENAME").Value = maxname
Catch ex As Exception
Dts.TaskResult = Dts.Results.Failure
End Try
Dts.TaskResult = Dts.Results.Success
End Sub
End Class
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Brief overview...Running SQL Server 2003 Server Enterprise 64 bit - All Service Packs and patches current
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