how many users can open a connection to Microsoft Access database simultaneously ?I am using asp.net 4.0 to write my application.
<add name="E_ShopAccessConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|
eport.mdb;Persist Security Info=True" providerName="System.Data.OleDb"/>
Iam using the DBconnection object through out my applicationI use the same as a singleton objectWhen more operations are performed on the single objectit throws an error ERROR [HY001] [Microsoft][ODBC Microsoft Access Driver] Cannot open any more tables.But it occurs only some timesHow to solve this?Can any property can be set to avoid this type of error.Or can i overload and write any method to avoid thisTo Identify the same i wrote some Poc and tried alsoLike opening the connection object and looping through 1000 times and creating a command object for the connection and running a query.Some times iam getting the exception and some times its running
View 7 Replies[Code]....
and i am receiving error as
ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
Description:An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.Odbc.OdbcException: ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
We are currently migrating our test databases to a new server and I am switching one of our sites over to use them. When running the application from my development box it hits the database just fine. However when I compile and push the code out to our test server and try to use the same datbase I get the ExecuteNonQuery requires an open and available Connection. The connection's current state is closed error. I cannot seem to figure out why. Also when I point the site at our old test server it works just fine.
View 1 RepliesI'm using Visual Studio 2008, and my database is SQL Server 2000.
I want to add a connection to the Server Explorer in VS. The Data source is Microsoft SQL Server (SqlClient). After entering in all my information and I click Test Connection, it is successful.
But when I click OK, I get the error:
Unable to add data connection. ExecuteScalar requires an open and available connection. The connection's current state is closed.
I previously used a datasource and a connection string to connect to my database on sql server and all orked fine. The connection string was saved in my web.config file and is: ....
View 1 Repliesjust for my testing purpose i know i can define both the connection's outside in a single web config file by different name's and access them in my front end according to it but what if i want to have seprate for both connection's web.config situation is like this see image so i want to access my connections from second web config file how i can do that.
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i tired this but its giving error
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I have 4 file uploader in my form to upload 4 images in the DB for each article submitted. My issue when I want update/edit my article with some new pictures and I want delete or update the old pictures with the replacement with the new one.
How I can implement it? I am using ASP.NET based on VB.NOT .... NOT C#
I deployed my MVC app to IIS 7.0 and I keep getting the following error; ExecuteNonQuery requires an open and available Connection. The connection's current state is closed I dont get this with the app locally on my machine. Where could this error be occurring??
View 2 RepliesAllow Admin Users to Access Basic Users Accounts?
View 4 RepliesI am using microsoft enterprise libarary to connect to mysql using mysql .net connector (latest version 6.2.3)
But i am facing a problem of too many connections and connection pool reached maximum limit issue.
As connection is disposed by enterprise library iteself so i dont close the connection anywhere.
So after two or three hours i found i have 100 mysql connections in sleep mode which are doing nothing and are not being reused from the code .
So i want to ask is there any issue with my code or is there any issue with mysql connector
I open Microsoft Word through ASP.NET , when I load by visual studio 2008 works well.but when I put my site in my IIS folder and access the site through Internet Explorer and click the button nothing happens.Don't happen anything. Why my code :
wdApp =
New
Microsoft.Office.Interop.Word.Application
I have problems connecting to my database server. The database server is not local, I am connected via its IP address. It works fine in my development machine. After publishing the website to my server, it can not connect to my database server. A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)Why can't my publish server connect to the database server, whereas it works fine through the development machine?
View 5 RepliesWhen should i open and close the database connection.and which are best data classes (for e.g dataset, datatable etc) should i use when connection is open or close.
View 3 Repliesi have an aspx page with one button on it the name of the page is Default.aspx
i have a physical microsoft office word file in the c drive
what i want to do is that when i press a button i open a microsoft office word located on the c drive then i add some text to it using c# code
then i want to open the file (that i edited and located in memory) in mircosoft office word to see the text that i have added
everything works fine but when i press the button i get a prompt that says do you want to open the file or save it .
questions:
so how can i directly open the file (located in memory) in microsoft office word without this prompt
also if i choose open from the prompt the file opens in the read only mode and the title of the file in the microsoft word become the name of the aspx page which is Default.aspx
so what is going wrong here
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I am trying to import excel sheet, got an error like "
The Microsoft Jet database engine cannot open the file ''. It is already opened exclusively by another user, or you need permission to view its data"
I have given all necessary permissions but no luck..
I have a code to link to sql can anyone give me the same code for microsoft access....
try
{
int videoID = Convert.ToInt32(Request.QueryString["ID"]);
SqlConnection conn = new SqlConnection("server=WEBDESIGN-PC;database=Credentials;uid=sa;pwd=Azeem;");
conn.Open();
SqlCommand cmd = new SqlCommand("SELECT * FROM videopath WHERE videoID=" + videoID, conn);
SqlDataReader dtr = cmd.ExecuteReader();
dtr.Read();
FlashVideo1.VideoURL = Convert.ToString(dtr["Filepath"]);
Label1.Text = Convert.ToString(dtr["Filename"]);
conn.Close();
}
catch (Exception ex)
{
Label1.Text = Convert.ToString(ex);
}
finally
{
}
This is regarding ASP.Net (VB) 2.0 and SQL Server 2008. My project's (there is only one in my solution) has a "Start Action" set to a "Specific Page" (..FormsfrmMain.aspx). Occasionally (though not always) a large number of connections (30+) will be opened prior to the frmMain.PreInit event. These connections stay open for quite some time. I am closing all of my connections with extreme prejudice. In my "finally" clause of my try...catch I have myconnection.close. Immediately after the "End Try" I have myconnection.dispose (redundant, I know). I have accounted for all connections. I placed a breakpoint on frmMain.PreInit and then (sometimes) a large number of connections (used SSMS to run sp_who and sp_who2) will have just opened.What would open a large number of connections prior to the starting page's preinit event? I am closing (and then disposing) all of my connections. I thought that I must be missing a myconnection.close in the "finally" clause, but I have looked repeatedly and cannot find anywhere that a connection is open and then not closed. Also, I do not believe that I have even opened a connection prior to the frmMain's preinit event.
View 3 RepliesI devlopyed on asp.net application in IIS, i need to know how many current database connection is open for the database..
so how can i check how many connection are currently using for this database... if we dont want some connection how can we kill the connection
this is general to any operation calling an SQL server, or anything requiring an open connection at that.Say I have anywhere from 20 to 1000 Select calls to make for each item in data being looped. For each step, I'll select from sql, store data locally in a struct, then proceed. This is not a very expensive call, so should I keep the connection open for the entire loop? Or should I open and close every step? How expensive in run time is opening a connection? I would think it'd be better to keep the connection open, but would like to get the correct response for this.
View 4 RepliesI am writing an application on my PC to insert record on a Microsoft Access database on another pc that has static ip address remotely.I can ping the remote address of the PC that I want to access without problems. The access database is in the folder c:inetpubwwwrootdb.mdb.
I have the code below but when I run it I am getting the following error:
error on ther server the object model couldn�t be found
OleDbException 0x800a2011
<%@ LANGUAGE = VB Debug="true" %>
<%@ Import Namespace="System.Data.OleDb" %>
<%@ Import Namespace="System.Net.Mail" %>
<%@ Import Namespace= "System.Web.UI.WebControls.Menu" %>
<%@ Import Namespace="System.Data" %>
<script Runat="Server" language="VB">
public sub button_click(s as object,e as EventArgs)
dim ssql as string
dim strconn,objconn,rs,dbcomm
Dim ds As New DataSet
Dim da As OleDbDataAdapter = New OleDbDataAdapter
objconn=new oledbconnection("Provider=MS Remote; Remote Server=http://196.45.161.123; Remote Provider=Microsoft.Jet.OLEDB.4.0; Data Source=\db.mdb;Persist Security Info=False")
objconn.open ()
dbcomm=New Oledbcommand("employee",objconn)
dbcomm.commandtext="insert into employee values ('mostafa',7,'tanzania')"
dbcomm.Connection = objconn
dbcomm.ExecuteNonQuery()
objconn.close ()
end sub
</script>
<html>
<Head>
</HEAD>
<BODY BGCOLOR="White" TOPMARGIN="10" LEFTMARGIN="10">
<form Runat="Server">
<asp:textbox id="t1" Runat="Server" text="type" />
<asp:button id="b1" Runat="Server" onclick="button_click" text="clickme" />
</form>
</BODY>
</HTML>
Using vb.net 2005
I am trying to open a connection object in a windows service but getting an error, what do i need to do:
what I have now:
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on the Open line i'm getting a squiggly error saying "declaration expected" for the MyCon.Open.
do I need to import something?
I have an application that takes a long time to open odbc connections (like 20 sec) also takes forever using arcmap and arcsde but when I try the connection on the odbc data source administrator, it tests it really fast. Does anyone have any idea of what my be causing this? btw the application works fine in another computer with another database
View 2 RepliesI wrote a small socket client application talking to my asp.net server application.
On the asp.net side, I created a IHttpHandler. I want to send data back and forth on one HTTP request.
I tried the following code which run an infinite loop inside function ProcessRequest(). The client side opens a socket connection and send HTTP POST request.
I am not sure how asp.net work. In HTTP POST I have to specify Content-Length, I tried a small value, like 20, then asp.net handler can only get 20 bytes in the inputstream. I tried to use 4096000 bytes(close to the maximum IIS allowed), then the inputstream cannot get anything, it seems IIS is waiting for all data(4096000) to come from client side before it gives the handler a chance to read from the socket.
public class DeviceDataHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
try
{
Stream inputstream = context.Request.InputStream;
Stream outputstream = context.Response.OutputStream;
/loop forever until exception is thrown
while (true)
{
ProcessData(inputstream, outputstream);
}
}
catch (Exception ex)
{
ZenLog.logError("DeviceConnector exception: " + ex.Message);
}
}
public bool IsReusable
{
get
{
return true;
}
}
}
I have used vs 2008 to develop an asp.net application.
This application can run in windows xp, windows vista, but can't run under windows 7.
When the application want to new an database connection, it retun null.
I am using sqlserver 2005 express sp3 as my database.
The connection is :
Data Source=./SQLEXPRESS;Initial Catalog=mydb;Integrated Security=True
How can I do?