I'm already using ORacle 11G. The problem is when I'm using System.Data.Oracleclient to pull blob into picturebox it's ok, but when i'm using OracleDataaccess.Client / Types.....there no image appear n comeout error " Parameter is not valid" in this coding :-
Dim bmp As Bitmap = Image.FromStream(ms)
I have the following code below. I am reading a BLOB image from database, but when I try to display it in the picture box I am getting the 'Parameter is
Code:
Imports System.Drawing
Imports System.Drawing.Imaging
[code].....
I'm trying to assign an image which is stored in mySQL database to PictureBox item.
Here is my
...
Dim rs As ADODB.Recordset
rs = New ADODB.Recordset
Dim mystream As ADODB.Stream
[code]....
I have determined thanks to the last q & a that there is something wrong with my "save to db" code as well as my "retrieve to picture" code. Even If I manually save the pic in the db it stil wont retreive. This is code i patched together from 3 or 4 examples around the net.
Dim filename As String = txtName.Text + ".jpg"
Dim FileSize As UInt32
Dim ImageStream As System.IO.MemoryStream[code]......
How can I declare a blob field in an access database with SQL?
View 1 RepliesSaving BLOB to mysql database using VB.net windows base application
View 8 RepliesI had been using this way for while, and it seems it work fine with char and numbers.
Dim MyVar1 as String = "Hello"
Dim MyVar2 as Integer = 1
Dim MySQL = "Select * from table where field1 = '<field1>' and Field2 = <field2>"
MySQL = MySQL.Replace("<field1>",MyVar1).Replace("<field2>",MyVar2)
msgbox(MySQL)
But, when I have to deal with blob field, where I store "wav file" for example, I had to read it as array of bytes, and the only way I find to insert the array of bytes in my query string is by using the command.AddParameter
Dim myfile As System.IO.FileStream = System.IO.File.OpenRead("full_wav_file_path")
Dim myArray(myfile.Length) As Byte
myfile.Read(myArray, 0, (myfile.Length))
[Code] .....
Is there another way to insert it without addParameter?
I need to add a download counter to know how many times my BLOB data is read and displayed from the database (to determine traffic). How and where can I add this counter?
I have a dynamically generated list of links such as <a href="page.aspx?DocID=IDhere">Document filename</a> which direct to a display page.My display page code looks like:
Protected Sub Page_Load
Dim DocID As Integer = Convert.ToInt32(Request.QueryString("DocID"))
Dim connStr As String = conn string here
[code]....
ASP.net app inserts Microsoft Windows 2007 .docx file into a row on DB2 OS/390 Blob table. A different VB.net app gets the DB2 OS/390 Blob data. VB.net app kicks off Microsoft Word to open the .docx file but then Microsoft Word pops up a message that the data is corrupted. Word will allow you to fix the data so the file can be viewed but it is extra steps and users complain.I've seen some examples where .docx can be converted to .doc but they only talk about stripping out the text. Some of our .docx have pictures in them.
View 1 RepliesI am trying to extract a saved image from a database and then attach it as a image to an email. I can get the image saved into a Bitmap object but attaching it is not going so well. Here is what I got:
Dim rawData() As ByteDim byteArray() As ByteDim ad As New System.IO.MemoryStreamDim bm As Bitmap
byteArray = imageData.Item("img") ' imageData is my dataread for the tablerawData = New Byte(byteArray.Length) {}
[Code].....
I have tried several variations so the code might be convoluted, but basically I am putting the image into a byteArray and Bitmap (which was something added later on) but also trying use the Mail library to attach the image but also have the image referenced within the html body of the email in which it will be embedded. The attachment part seems to work - some what - but the image itself is not getting attached.
We are trying to store and retrieve datatable as blob (varbinary(max)). We convert the existing datatable into an xml file and store that xml file as a blob and while retrieving we get the blob as xml file and convert it back to datatble. It seems to be storing and retrieving the xml object but having issues while converting it back to the datatable ("End of stream - error").
View 2 RepliesI have a project where the user wants an image stored in a Blob field of a MYSql database. I have been searching for info on the net but so far have not found a good solution for this.In this case the record will already exist in the database and I will need to insert the image into the existing record based on the recordid.Is there a simple way to do this perhaps with a stored procedure and an execute statement. I have very little experience with MySql and little with storing images in a database as well. Most often I will store the images as files and use a pointer in the db record but this user wants it in the db so here we are.
View 1 RepliesI'm trying to read a BLOB from a SQLite Database.
View 3 RepliesI am having a problem storing an image as a Blob in a SQL linked table. Our system uses an Access 2002 frontend and linked to a SQLServer2000 database. I have a form that I want to display a unique client jpeg photo for each client record. Our client HIPAA concerns means we have to store the image not the path in the database field. I am using an Image control on the form. Initially I have been able to load an image from a Windows Dialog into the control and save the path no problem.
My issues are surrounding how to actually save and load the jpeg as a BLOB in a VBA byte Array after the image has been loaded to the form from the dialog box.(Is there some sort of binary conversion needed or does the Append and GetChunk methods handle all this)?:
All the code examples I have been able to find on the subject have a line of code to set the Image control's data source to the open recordset with this statement ---> Set imgDBImage.DataSource = rs. Does this statement work with VBA because DataSource does not show up as a property of an Access 2002 Image Control. So how do I point the Image Control to the table field which contains the BLOB in VBA code?
Finally, how do you convert the string path of the image to binary for storage in a byte Array in VBA. I have the syntax for a VB 6.0 which is..... .Fields("ImageBLOB").AppendChunk bytBLOB. Is the .Fields portion of the code relevant in VBA to tell what table field to write to and does the AppendChunk method handle all the conversion?
im trying to upload my image to my database. I've searched and found a way to do this by uploading the image as a blob to the database.On the field IMG on my Database I have set it to BLOB. how can I send a image to the field?
PS. I tried
vb.net
Dim sqlquery = "INSERT INTO `decap`.`test` (`MD5`,`img` ,`value`)" _
& "VALUES ('C20E743343GDG'," & (OpenFileDialog1.FileName) & " ,'0')"
No luck. I get a file of like 3bytes.
I am recieving an error when I am trying to write a blob file to MySQL. figure out what I am doing wrong. Here is my code:
[Code]...
I'm working on a simple image tagging and searching app. I've got my images uploading to the DB, the tags being applied, but am failing when I pull them back - the images don't render. I found this here on SO, but I'm not able to get it working.
[Code]...
I have a table with a blob field that stores photos in jpg format. Is there any way to direct fill the Dataset with the OracleDataAdapter?
Like:My code in vb.net
Dim oAdp As OracleDataAdapter Dim v_oDs As DsSubRegistro <- My Dataset
oAdp = New OracleDataAdapter(myConnection.sqlCmd("SELECT * FROM ..."))
With oAdp.TableMappings.Add(Common.DbDataAdapter.DefaultSourceTableName, v_oDs.Foto.TableName).ColumnMappings
[Code]...
Trying to insert a large audio file into an Oracle 10g database and keep getting this error:
ORA-01460: unimplemented or unreasonable conversion requested
The byte array length of the audio file is 2702577. The procedure works with smaller array lengths, but not the larger ones.
Here is my code:
Dim oracleConnection As New OracleClient.OracleConnection
Dim Cmd As New OracleClient.OracleCommand
Dim oracleDataAdapter As New OracleDataAdapter
oracleConnection.ConnectionString = System.Configuration.ConfigurationManager.AppSettings("MasterConnectionODT")
[Code] .....
I am retrieving a large BLOB and keep getting an Out Of Memory Exception. It occurs when I use a SqlDataReader to either check if the column is NULL, or if I try to read it and assign it to a Byte type of parameter, or if I use Response.BinaryWrite.
View 2 RepliesI would like to insert several PDF files into oracle. I have been looking for some examples but i didn't find it.
View 1 RepliesI just wondering can Itext done the following function before i dive into it.I want to develop a window application, and schedule this application in my server. This application should query the data from (oracle) and with itext help (i hope it help), generate pdf report. Then insert back to oracle as blob.
View 2 RepliesI'm calling some data from my Oracle table and I have a field which is called 'image1' which is a BLOB field.
Sometimes an image is input into the field and others it's not. I need a way to read the BLOB field to see if its a blank and then show/hide my label based on its contents.[code]...
I'm having problems with an Invalid Cast Exception when I try and read a PDF from a database as a BLOB. I am able to write the files into the database no problems at all,however, when I try to retrieve them I just get InvalidCastException.Here is the code I'm using:
Protected Sub btnPDF_Click(sender As Object, e As EventArgs) Handles btnPDF.Click
' Request.QueryString["docid"].ToString();
Dim docuid As String = "b39a443d-ccfd-47f4-b333-f12cd94683d6"
[code].....
I 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.
How do I store BLOB data (e.g. image, document) into the database?
View 1 Repliesits been a while since i was here... it's nice to be back... anyway, i was wondering how to upload a jpeg picture to a blob datatype field in MYSQL. i know i could just put the picture path in a varchar type field and just place the picture somewhere locally and retrieve it programatically. but my project does not require me to do so.
View 2 Repliesi've created a pluginframework and i have some problems with it. At first you should know that the framework is only an interface designed like this:
[code]...
I'm trying to zip a file that is stored on SQL Server as a blob image field and when downloading the zip file it says the file is corrupted.. or the file will open but contains some crazy characters. I've tried WinRAR and 7zip and no luck. I checked out [URL] and tried to kind of combine the browser attachment code and the memorystream/byte array code and no luck.
Here is my code snippet:
Try
BinData = DirectCast(dt.Rows(0)("ImageField"), Byte())
Catch ex As Exception
End Try
Dim blen As Integer = BinData.Length
[Code] .....
I'm trying to read a binary file from a FileMaker 11 container field using Filemaker's own ODBC driver. I was able to write files to the database and this works fine. retrieving them manually works fine and the files look OK and are not corupted. However when retreiving them using VB.NET, and if the file size is approx > 5MB, I get the following "uncatchable" error (yes thats right, I cant "Try Catch End Try", it just crashes):
System.AccessViolationException was unhandled
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
[code].....