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Still +1 for your answer. How should I interpret "English is poor" review when I used a language check service before submission? Thanks,Sarah   Friday, August 11, 2006 5:24 PM Reply | Quote 0 Sign in to vote Thank you all for the information! more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

asked 1 year ago viewed 1521 times active 1 year ago Linked 1 C# generics problem Related 1820Cast int to enum in C#190SET NOCOUNT ON usage2Whats the best way to handle System.NullReferenceException: Object reference not set to an instance of an object. If there is no row, then there is no value to find. EvenSt-ring C ode - g ol!f What does a well diversified self-managed investment portfolio look like?

Return Values: The time in seconds to wait for a connection to open. Proposed as answer by Dummy yoyoModerator Thursday, September 01, 2011 2:46 AM Unproposed as answer by Dummy yoyoModerator Thursday, September 01, 2011 2:46 AM Tuesday, August 08, 2006 11:55 AM Reply Firstly, let me report that my application has been running without any problem for about 35 hours since I followed the instructions of the following article: http://support.microsoft.com/default.aspx?scid=kb;en-us;899599 I did this out What is a type system?

The content you requested has been removed. If you are using .NET 2.0 and SqlClient, you will have an advantage in that you can connect over SQL Server 2005's shared memory protocol instead of TCP/IP. like using getusername without checking if it's null in code he did not post? What is the value of cmd.ExecuteScalar() returns?

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Thank you ever so much!!! Thanks, Leonid This posting is provided "AS IS" with no warranties, and confers no rights. which return some value if theirs no record ? current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list.

I don't know for sure if those errors are related to your connectivity error, but if they always occur together, I'd say it's a good bet. I needed to return the count from a table using something like this to make sure a record was not already in before INSERTING. Both of these solutions would avoid the TCP/IP connection altogether. Privacy Statement| Terms of Use| Contact Us| Advertise With Us| CMS by Umbraco| Hosted on Microsoft Azure Feedback on ASP.NET| File Bugs| Support Lifecycle 12,535,224 members (47,668 online) Sign in Email

You also mentioned that you are connecting to SQL Server 2005. If the row exists, but has NULL in username (is this even possible in your DB?), the result of command.ExecuteScalar() is DBNull.Value, resulting in an InvalidCastException. please do not apologize. share|improve this answer answered Jan 4 '10 at 11:51 Richard 72.7k13113185 add a comment| up vote 0 down vote I Use it Like This with Microsoft Application Block DLL (Its a

Is there any job that can't be automated? Now, you are trying to convert a null value to an Integer and you get the error. hz

Tuesday, August 08, 2006 10:39 AM Reply | Quote 0 Sign in to vote Are you maintaining a persistent connection to the database? Hot Network Questions The mortgage company is trying to force us to make repairs after an insurance claim (Somewhat) generalised mean value theorem Logical fallacy: X is bad, Y is worse,

This will help narrow it down... Issue several separate queries including one or more ExecuteScalar requests all at once from application (20-30 queries). If so, I would recommend that you open and close connections only as needed instead. Ron Beyer 17-Jan-14 10:00am Thats not true in this case.

Reply geekmeister None 0 Points 21 Posts Re: ExecuteScalar gets Specified cast is not valid error Sep 19, 2004 08:51 PM|geekmeister|LINK Interesting explanation. Insults are not welcome. Shared Memory is at the top of the list.  Does this mean it has the highest priority? I hope that isn't how you do sql normally... –Marc Gravell♦ May 20 '13 at 10:22 @MarcGravell: Sry for my bad practising habbit , and yes next time i

var result = cmd.ExecuteScalar(); int countDis =result != null ? It says "MDAC OLEDB uses TCP protocol when you connect through (local) and localhost and in your case, your TCP/IP was disabled, you can verify this by enabling TCP/IP. more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation At first I was afraid I'd be petrified Appease Your Google Overlords: Draw the "G" Logo Is "halfly" a word?

An explicit conversion exists (are you missing a cast?) Could you post the actual code you have used? –Branko Dimitrijevic Oct 31 '11 at 0:53 @HemantKothiyal check the msdn So the first thing you can check is what ExecuteScalar is really returning. To see what is really returned? Here is the piece of code establishing the connection OleDbConnection oldbCnInfoLocal = new OleDbConnection();

oldbCnInfoLocal.ConnectionString = "File Name = \\My Documents\\local.udl";

oldbCnInfoLocal.Open(); Here is the content of local.udl: [oledb] ; Everything

and If objCmd.ExecuteScalar() = Nothing Then ... Updating my answer anyhow. –Rune Grimstad Jan 4 '10 at 11:51 Yess it work, But i am not getting why should we avoid using executescalar() –Hemant Kothiyal Jan 4 See ASP.NET Ajax CDN Terms of Use – http://www.asp.net/ajaxlibrary/CDN.ashx. ]]> Developer Network Developer Network Developer :CreateViewProfileText: Sign in MSDN Why is the spacesuit design so strange in Sunshine?

If not, see if it still returns Decimal as the type. Aside that, this line could possibly be your problem: string getValue = cmd.ExecuteScalar().ToString(); If there are no rows .ExecuteScalar will return null so you need to do some checking. But if you can prove me wrong and show me some code that you know works in v1.1 and doesn't work in v2.0, I'd be very intereseted to hear that! the code in the question does not show this... –Marc Gravell♦ May 20 '13 at 10:19 Yep this should work. –Dimitar Dimitrov May 20 '13 at 10:23

Thursday, May 19, 2011 9:59 PM Reply | Quote Microsoft is conducting an online survey to understand your opinion of the Msdn Web site. If your application is accessing the database frequently then it should benefit from connection pooling. Issue seems to be related to the number of queries not volume of data. Maybe the "network" in the error message has a very broad meaning.

If the username and password is correct, I do not get an error, but if it's wrong then I get an error in this line: int count = Convert.ToInt32(cmd.ExecuteScalar().ToString()); log in Should i change my query ? It's not strongly typed because the SQL statement is arbitrary, so the type isn't known until it's parsed (which is by the DB engine, not by the .NET runtime). You’ll be auto redirected in 1 second.