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Hi
I have a local computer(its name is SUN) with sqlserver2000 , IIS and VS.Net.
I have a web app name it WebApplication1 and a database name it Northwind.
When i run this webapplication it runs this portion of code:
System.Data.SqlClient.SqlConnection this.sqlConnection1;
private void Page_Load(object sender, System.EventArgs e)
{
this.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
this.sqlConnection1.ConnectionString = "workstation"+
"id=SUN;packet size=4096;integrated security=SSPI;"+
"initial catalog=Northwind;persist security info=False";
this.sqlConnection1.Open();
this.sqlConnection1.Close();
}
but i see this error:
Login failed for user 'SUN\ASPNET'.
In the IIS i cleared Anonymous access check and added user SUN\ASPNET to Northwind database in Enterprise Manager but error didn't fix;
In the same windows app this error doesn't exist.
What should i do plz?
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Dear Programmers,
I have a small problem with sql stored procedure.Does sql storeprocedure
can return more than one recordset (for example say 2 recordsets).
If so can you pls explain me how to get those 2 recordsets through VB
I have already tried the same with single recordset.
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Thanks for the solution
one more thing is that i want to get those recordsets through VB 6.0
Please help me
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Use the RecordSet's NextRecordset() method
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Dear Visual Basic & Access Experts
In my application program, I have a Access (version xp) form that calls a update event handler. In this handler I need to know if the user has clicked on the "Close" button of the form. What VBasic codes do we use to check what action triggers off the the chain of events that lead up to the update event & onwards? In particular I am interested to to check if the triggering event is the clicking of the "Close" button of the form; if so I will then write some code to handle this particular case. I tried to handle this via Close event handler but since it comes after the "Update" event, it does not work.
Please help...Cheers! Michael
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How do I detect error while running script with "osql" utility?
Dim cmd As String = "osql.exe"<br />
Dim args As String ="-S localhost -U joe -P xxx -d master -i"<br />
Dim fullCmd As String = args + " '" + scriptfile + "'"<br />
<br />
info = New ProcessStartInfo(cmd, fullCmd)<br />
info.UseShellExecute = False<br />
<br />
ps = Process.Start(info) 'Is there any way to monitor if any error encountered during script execution?<br />
ps.WaitForExit()<br />
Thanks in advance!
Norman Fung
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Hi,
(not sure if this is the right forum to post into)
I have an extended stored proc (C++ dll) that calls a managed DLL that calls a web service, and all is going well until the point in the managed DLL that invokes the actual webservice. At that point SQL server complains of a connection lost.
This is probably got to do with the fact that uses SQL, however the webservice is on an entirely different box, with it's own SQL server, so I'm not sure exactly what to do about it.
Has anyone come across this before or has anyone got any suggestions on how to fix it?
thanks in advance
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hi,
im using databases in MsSqlservers but i have a major problem that when i connect to my database by SqlConnection the connection is too slow but when i use query analyzer to get the same date its very fast(about 20 times faster)
i wnat to know if there is a way to speed up the sqlconnection..
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UAU wrote:
when i connect to my database by SqlConnection the connection is too slow
UAU wrote:
i use query analyzer to get the same date its very fast
I'm confused. Do you mean that the act of initially connecting is slow? Or do you mean the act of transfering data to the application is slow?
Also, you don't supply the code you are using so it is difficult to tell if there are any bottlenecks that are causing the problem because I've always had consitent results between the speed of the Query Analyser and my .NET applications.
Do you want to know more?
WDevs.com - Open Source Code Hosting, Blogs, FTP, Mail and Forums
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hi,
i mean the act of transfering data to my application is slow.
i use sqldatareader in my application and my qurey is just a simple select query,telling that when i tested the connection by SqlDataAdapter the speed was as fast as query analyzer.
is it possible that using Sqldatareader makes the data transfer too slow?
thanks
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hi,
here is my code(it runs on a different thread from the main thread of application)
com.CommandText = "select something";<br />
rd=com.ExecuteReader();<br />
if(rd.HasRows)<br />
{<br />
rd.Read();<br />
do<br />
{<br />
}while(rd.Read());<br />
}<br />
rd.Close();<br />
if(cur.Nodes.Count > 0)<br />
{<br />
com.CommandText="select somthing";<br />
rd=com.ExecuteReader();<br />
rd.Read();<br />
}<br />
rd.Close();
i have to run these codes for several times in my application..
thanks
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Personally, I would have written this as
rd=com.ExecuteReader();
while(rd.Read())
{
}Rather than do all that rd.HasRows() followed by a do{}while() but I don't see how this would make it faster unless HasRows is particularly slow.
When you timed the data transfer using a SqlAdapter did you include the time to perform all the other actions where you have indicated // some code goes here?
Do you want to know more?
WDevs.com - Open Source Code Hosting, Blogs, FTP, Mail and Forums
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hi,
the action on the datareader is just pick up the datas and save them but on my machine with about 2.6 GHZ i dony think the code makes it sliw,is it possible that my sql query wich has where clause makes the transactions slow?
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UAU wrote:
is it possible that my sql query wich has where clause makes the transactions slow?
Possibly, but it does not explain that your test using a SqlDataAdapter was faster (I am assuming you performed exactly the same query). It should have been slower because using the SqlDataAdapter makes a copy of the data in memory (in the DataSet object) before you can pick up the data and save them.
What does your SQL Query do?
Do you want to know more?
WDevs.com - Open Source Code Hosting, Blogs, FTP, Mail and Forums
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this is the complete source code,but to tel you the truth i didnt use the same query with my SqlDataAdapter i made a simple select query with no where clause.
com.CommandText = "select * from general where parent = @id order by menuindex desc ";<br />
rd=com.ExecuteReader();<br />
if(rd.HasRows)<br />
{<br />
rd.Read();<br />
do<br />
{<br />
if(rd.GetBoolean(2))<br />
AddSeperatorDownLoad(cur,0);<br />
else<br />
AddNodetoNodeDownLoad(cur,0);<br />
SetChild(cur.Nodes[0],rd);<br />
list.Push(cur.Nodes[0]);<br />
}while(rd.Read());<br />
}<br />
rd.Close();<br />
if(cur.Nodes.Count > 0)<br />
{<br />
com.CommandText="select * from popup where menuid = @id ";<br />
if(con.State == ConnectionState.Closed)<br />
con.Open();<br />
rd=com.ExecuteReader();<br />
rd.Read();<br />
SetPopup(cur,rd);<br />
}<br />
rd.Close();<br />
if(curtag.menuItem != null && curtag.menuItem.GeneralSetting.IsPage)<br />
{<br />
curtag.menuItem.GeneralSetting.Page=new PageSetting();<br />
com.CommandText="SELECT Title, KeyWord, IsGuideLine, Description "<br />
+" FROM Page where menuid=@id";<br />
rd=com.ExecuteReader();<br />
if(rd.HasRows)<br />
{<br />
rd.Read();<br />
curtag.menuItem.GeneralSetting.Page.Description=(string)rd["Description"];<br />
curtag.menuItem.GeneralSetting.Page.IsGuideLine=(bool)rd["IsGuideLine"];<br />
curtag.menuItem.GeneralSetting.Page.KeyWords=(string)rd["KeyWord"];<br />
curtag.menuItem.GeneralSetting.Page.Title=((string)rd["Title"]).Replace("Karmania Media ::","");<br />
curtag.menuItem.GeneralSetting.Page.PageContent"";<br />
}<br />
rd.Close();<br />
}<br />
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Okay, here are some general tips - They may or may not improve the speed
1. Don't use SELECT * because if your data model changes on the database then your code could break if the position of columns changes. You should always send a list of the columns you need that way if there are any additional columns in the table that you don't need to don't waste time retrieving them and you always know the order the columns will arrive in.
2. If the table is large you may wish to consider indexing the columns that are referenced in the WHERE and ORDER BY clauses. However, if you do a lot of INSERTs on the table you may have to balance the needs of inserting quickly over retrieving quickly. Adding indexes slows down INSERT, UPDATE and DELETE operations because it has to modify each affected index as well as the table.
3. You can replace
if(rd.HasRows)
{
rd.Read();
do
{
}while(rd.Read());with
while(rd.Read())
{
}which removes the redundant rd.HasRows call. Because the first call to rd.Read() will return false anyway if there are no rows in the result set the rd.HasRows can be removed if the check on the while is moved to the top of the loop rather than at the bottom of the loop
I hope this helps.
Do you want to know more?
WDevs.com - Open Source Code Hosting, Blogs, FTP, Mail and Forums
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hi,
i found something ,when i use sqldatareader the recieved data is more than 1 MB that the real data is less than 100KB ,is it possible that when i use datareader for many transactions i have too much overhead in recieved data?
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I am trying to access SQL Server 2000 across a personal network. I am using the following connection string:
"Data Source=\\GUITARCHORD\LABTRACK;Initial Catalog=LabTrack Server;Integrated Security=SSPI;User ID=someone,Password=pass"
The name of the computer is GUITARCHORD, the name of the SQL Server instance is LABTRACK, and the name of the database I am trying to connect to is LABTRACK SERVER. The user id and password are the Windows Login for the computer that SQL Server is running on. SQL Server is running but I can only access it if I am working on the same computer. I am using VB.NET to try to access this server. I am getting the following error message:
"SQL Server does not exist or access denied."
I have tried every thing I could think of for a connection string, including using TCP/IP settings. Any suggestions would be extremely helpful.
------------------------
ColdWaterBlue - Rock On
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I actually just figured it out myself. The two front slashes are not needed, but you need to add a user to the SQL Server (in my case, add the 'Guest' user) and give it administrative rights over the database. The User ID and Password are no longer needed, since the Integrated Security uses a trusted connection. Thanks anyway.
------------------------
ColdWaterBlue - Rock On
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Hello
In C# windows forms i have some TextBox that are binding to my Dataset.I want to get the current row to set my DataRow for delete the current row ,for using objDataRow.Delete() method
How i can do it ?
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