Access :: How To Avoid "There Is Already Open Datareader Associated With This Command Which Muct Be Closed

Jul 21, 2010

i am getting this error "There is already open Datareader associated with this command which muct be closed first"

what are the chances of getting this error becoz it giving me so much problem

and how can i solve this error by writing a well code

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when i insert record ,There is already an open DataReader associated with this Command which must be closed first.

SqlConnection conn = new SqlConnection(@"Data Source=LocalhostSQLEXPRESS;Initial Catalog=StudentDetails;Integrated Security=True"); [code]...

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protected void Page_Load(object sender, EventArgs e)

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ADO.NET :: How To Handle Error : DataReader Associated With This Command Which Must Be Closed First.

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what are the best way to handle this error

There is already an open DataReader associated with this Command which must be closed first.

i have created my own conneciton class for the same

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I am getting an error that an open DataReader associated with this Command, when I'm not using datareader(though probably executereader() is the same thing) how would I close this if I don't have a datareader present?

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{
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[code]...

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I am having a little trouble with an 'IndexOutOfRangeException'. I think it is because when the code tries to get the DateModified col from the database it sometimes contains NULLS (the users haven't always updated the page since they created it).

Here is my code;

s = ("select datemodified, maintainedby, email, hitcount from updates where id = @footid")
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I thought (after a bit of msdn) that adding;

If r.HasRows Then
End If

after adding I am still getting the same old IndexOutOfRangeException

(ps, I have tried datemodified as string / datetime)

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Apr 22, 2010

I've got a static class containing a static field which makes reference to a wrapper object of a DataContext.

The DataContext is basically generated by Visual Studio when we created a dbml file & contains methods for each of the stored procedures we have in the DB.

Our class basically has a bunch of static methods that fire off each of these stored proc methods & then returns an array based on a LINQ query.

Example:

public static TwoFieldBarData[] GetAgesReportData(string pct)
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I am trying to create a DataReader to return a counted value from an Access Database. It all works if it finds some rows, but falls apart when there is no total.

My code is as follows (highlights);

[Code]....

The error that gets thrown is:

Description:

An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.IndexOutOfRangeException: BoxesOut

Source Error:

Line 43: if(reader2["BoxesOut"] != System.DBNull.Value)

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[Code] ....

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[Code]....

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[Code]....

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This my code,

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[Code] ....

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[Code]....

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