I'm currently battling to retrieve an image from SQL Server 2008 R2 in an asp webapplication using vb.net. The image is stored in the SQL Server 2008 R2 database as an image type. I've been researching for the past few days and can't seem to find anything solid on this topic. Apparently, the image has to be retrieved using
View 1 Repliesi have created a table named students with photo as varbinary(max)
i have designed a form with two buttons(insert and retrieve) and a picture box on it
Under insert button:
Try
Dim st As
New FileStream(OpenFileDialog1.FileName, FileMode.Open, FileAccess.Read)
[Code]....
inserting image is no problem but when i retrive image in picturebox it gives i message as "invalid object name students"
I am using Async socket class to handle HTTP data. The OnRecieve event handler looks like this:
Private Sub sck_onDataArrival(ByVal sData() As Byte, ByVal BytesTotal As Integer) Handles sck.onDataArrival
Try
Dim ms As New IO.MemoryStream(sData)
Dim returnImage As Image = Image.FromStream(ms)
Picturebox1.Image = returnImage
Catch ex As Exception
Debug.Print(ex.ToString)
End Try
End Sub
I realize this will not work because the byte array still contains the header information from the response from the server. How to strip this data without converting the byte array to a string. I need to strip the header response information and just be left with the image data and from there convert that data into a stream so the stream can be loaded into an image and displayed in my picturebox.
I am facing a problem when i am retrieving image from sql-server's database. I am using this code
View 6 Repliesi have been in state of hectic for the last 2 days making lot of research and finally made this code worked it for me. My problem is that, how can i make this code retrieve the image from sql server database...use picturebox to load it in the vb.net program.
Dim myfilelocation
As
String =
"C:myPicturesmyimage.png"
[code]....
Is it also possible to change the location of image where its getting the image. i mean, i would like to tell other computers to get their images from anywhere as long as it brings images to my server.i mean, say that comp1 which is connected to my database server for storing and retreiving information, gets his image from his location then the application sends the image to my server...the application retreives the image from the server..as simple as that.
i am working on my academic project in which i need to retrieve data from sql server table to textbox and image in vb.net . i am able to retrive data either in text box or only image can anyone help me out to get data in textbox as wel as image in picturebox.
View 1 RepliesI am running into a problem while attempting to to retrieve data from a database. One of the items is an iage and it's throwing an error when I try to convert the byte array to a bitmap.Here is what I have. The exception "Parameter is not valid." is being thrown when on the line bmpImage = New Bitmap(stream)
Private Sub GetCatList()
Dim strSelect As String
strSelect = "Select CategoryID, CategoryName, Description, Picture"
[code]....
Dim cmdstring As String = "SELECT A.ID, ProfileCategory, YearLevel, LastName,FirstName,MiddleName, Section,SchoolYear,StartTime,EndTime,Days,Laboratory, B.Image FROM ProfileInformation A JOIN Photo B ON (B.ID = A.ID) WHERE A.ID=" & lEmployeeID
[code].....
i'm trying to retrieve image from database to my picturebox. but ive got this error -onversion from type 'Byte()' to type 'Byte' is not valid.
I'm trying to use the MultiUpload flash script on my ASP / VB.NET project and, to upload a file (following the instruction available on [URL].. I created an HTTP Handler. It works fine but, at this point, I need to read a value from a ASP:Textbox available on the caller page. How can I read this parameter?
View 2 RepliesI'm trying to build a web application that uses an SSL connection. So I did some research and found out that I could use the RequireHttpsAttribute class to achieve what I needed. Thing is that when I use it, the execution of the application results in an 310 error(too many redirections). I even built a custom class to handle the switch from http to https. [code]
View 2 RepliesHow can i insert an image file from images folder to sql server database. I have <input id="File1" runat="server" type="file" style="width: 397px" />on my aspx page. I want to insert a blank.bmp file if user does not choose any image file. this blank.bmp file is in my images folder.[code]how can i insert an image from images folder.
View 1 Repliesi need to upload and display images to and from database. i have written this code for uploading and it uploads fine. except 1 problem. It crashes when i dont select an image. can someone help me fix it for null value? also how do you display an image in IE?
code for inserting image -
Dim imageInfo As FileInfo = Nothing
Dim data() As Byte = Nothing
imageInfo = New FileInfo(Me.UploadLogo.Value.Trim())
Dim imagestream As FileStream = New FileStream(imageInfo.ToString, FileMode.Open)
[code]....
this works fine only if an image is selected, crashes for NULL values.
I am trying to store a .png image inside a database using SQL Server 2008. I have done this just fine using mySQL but for some reason it looks like this when placing it into ms SQL Server:
[Code]...
I am building a site for our company to share files between all users but administrators will be the only users who can add new files to the site.I need the administrator to be able to upload a file to a folder on the server and at the same time create a new record for that file and include a title, description, url of file, and other details in the database. In one click.
View 4 RepliesDoes anybody know of a FAQ or tutorial to do an HTTP post with an upload of a picture?
View 5 RepliesHow to correctly insert image data from XML file to database table using sql server CE and openxml,XML file is written by vb.net DataSet.WriteXml method?image data is stored in database table is :
0x89504E47.my XML file Content after written by WriteXml method is :
<?xml version="1.0" standalone="yes"?>
<Data>
<Table>
<image>iVBORw0KGgoAAAANSUhEUgAAAcIAAAGuCAYAAAADLg..</image>
</Table>
</Data>
but after inserting with openrowset and openxml using stored procedure to another database table its value changes to this :0x2F0039006A002F00340041004100510.and is not the first value and raises an error in vb.net for opening image from database.
To .net programming. please can anyone assist me on any .net based simple http server code to implement on my application.
View 3 RepliesI want a PC to operate as a mini HTTP web server that can receive requests from local (WIFI) devices. I know how to resolve the addresses so that the URL of the PC will be known on the WIFI network, but I'm not sure how to get the PC to act as a HTTP server.
View 12 Replies[code] What I want to know is, if this is the right way to load an XML of a server, If yes, How do I handle exceptions like "Server Error 500" etc.I also want a nice little progress bar to show the user that the XML is being loaded of the server, How do I change the responseTimeOut.If No, How do I load an XML of a server??
View 4 RepliesI have a https site where i have to display images from a http source. To enable this i want to make a proxy, so i can display the image as:
src="https://mydomain/showimage.aspx?url=http://externalserver/image.jpg"
I can do this in Java, somthing like this:
Code:
InputStream in = new WebInputStream( url );
BrowserOutStream out = new BrowserOutStream();
while(in.read()){ out.write() };
in.close();
out.close();
Simple enough (although the code is simplified here). But i cant seem to find a proper example of the equivalent in vb .net. I am assuming i have to use System.Net.WebClient.OpenRead, but not sure where to go from there.
I have coded very simple asp pages to return an image when requested. But I need to do this from a vb.net application. So I assume I need to create a mini http web server. I have code for some that does not support asp or anything like that. Is there another method to return an image? Anyone have an example of this? Or again, do I need to find a web server control or app to use?
View 3 RepliesI've been trying to get this to work for days now, but I fail I have a very small HTTP Web Server using TCP sockets listening on port 80. I can connect and display html to the browser, parse GET parameters; but what I can't get is getting POST data. When I get a POST request, the headers and everything else come in fine, but the POST data is missing:
[Code]...
How can I send a POST HTTP request to a server (in Visual Basic 2010) and then receive the reply into a string.
View 1 Replies retriving the DNS server ip of my computer. But with my codes i only manage to the IP address of my computer.
Dim IPAddress As IPAddress = Dns.GetHostEntry(Dns.GetHostName).AddressList(1)
Dim strIPAddress As String = IPAddress.ToString
TextBox3.Text = strIPAddress
I have created a few months ago a simple tool in vb.net, that sends an xml code to server, and that server sends response after a while. Everything is performed in http session, for that purpose I use webbrowser control and webclient. I know it could have been solved in different way, however iam not an expert in vb.net, and also didnt want to spend too much time on it. Anyway it worked, until they had changed something on the server. Let me explain in a few words how that tool works, so it will be easier to understand the problem.
In the first part, I open an URL in the webbrowser control, subsequently I enter xml code in the textarea on that page and click on the submit button. In result of that I get another page with some data on it, namely links to xls files. In the next part I use webclient for downloading those files. What is important for all of these operations I need to use the same http session id.
So, simply by now, i just set headers in webclient - WebClient.Headers.Add("Cookie", WebBrowser1.Document.Cookie.ToString) What have guaranteed to use the same session id by the WebClient. However, after the change made on the server mentioned before, the JSESSIONID value is not available in that string. When I use https analyzer (fiddler), I can see that value there...until moment when I am using WebClient. Of course due to that fact, the webclient won't download files for me, because the session id is not the same.
There is one more thing, what would be useful. When I checked the cookies file on my harddrive, I saw that line starts like #HTTP_ONLY. I think that would cause that problem with jsessionid.
Now, I am coming to my question Do you have any idea, how I would get that JSESSIONID value ? It is sent from webbrowser control, however don't know how to get it.
Website dat have samples codes on HTTP GET/POST from a device server?
View 3 Repliesquick and easy: I have several pictureboxes with images that may or may not have the same image from my.ressources . And then I want to go through the matrix and check to see whats their images are. I tried to do:
View 1 Repliesmy 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].....
I am after some simple code to retrieve a txt file of a server (http) and store it in a string.
I have had a look around, but non luck.
I am using VB2010 on Windows 7
I am trying to send an HTTP Request to a server using a POST method. The problem comes from the PostData, which needs to be in Bytes form to be used by the UploadData function.
[Code]....