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#1: Problem with queries... Call for help.

Posted on 2008-01-18 18:48:47 by johnmay1248

I am having a problem with queries running in this code When I use the
query "SELECT * FROM sample" the code runs and the data grid binds and shows
the contents of the sample table. If I change the query to filter the
results such as "SELECT * FROM sample WHERE (sales > 2000)" the code fails
on - objDataReader =
objCommand.ExecuteReader(CommandBehavior.CloseConnection) with an unknown
error.


If I load the database up into access2000 and run the sql queries they run
as expected so I know they are valid queries of the data

I am a noob at asp.net data. Can anybody give me a hand?

The Code I am using is below followed by the error info with the stack
trace.

------------------------------------------------------------ -----------------

Imports System.Data.OleDb
Imports System.Data

Sub btnRunQuery_OnClick(ByVal Sender As Object, ByVal E As EventArgs)
Dim objConnection As OleDbConnection
Dim objCommand As OleDbCommand
Dim objDataReader As OleDbDataReader
Dim strSQLQuery As String

objConnection = New
OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" &
Server.MapPath("NewDatabase.mdb") & ";")

strSQLQuery = "SELECT * FROM sample"

'strSQLQuery = "SELECT * FROM sample WHERE (sales > 2000)"

'strSQLQuery = "SELECT * FROM sample WHERE key_id=5"

'strSQLQuery = "SELECT * FROM sample WHERE last_name='Johnson'"

objCommand = New OleDbCommand(strSQLQuery, objConnection)

objConnection.Open()

objDataReader =
objCommand.ExecuteReader(CommandBehavior.CloseConnection)

lblSQLCommandLabel.Text = strSQLQuery

EmployeeDataGrid.DataSource = objDataReader
EmployeeDataGrid.DataBind()
End Sub


------------------------------------------------------------ -

Unknown
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.Data.OleDb.OleDbException: Unknown

Source Error:
Line 61: objDataReader =
objCommand.ExecuteReader(CommandBehavior.CloseConnection)


Stack Trace:

[OleDbException (0x80040e14): Unknown]
System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandli ng(Int32 hr)
System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleRe sult(tagDBPARAMS
dbParams, Object& executeResult)
System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)
System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavio r behavior,
Object& executeResult)
System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(Command Behavior
behavior, String method)
System.Data.OleDb.OleDbCommand.ExecuteReader(CommandBehavior behavior)
Database101.WebForm1.btnRunQuery_OnClick(Object Sender, EventArgs E) in
c:\Database101\WebForm1.aspx.vb:61
System.Web.UI.WebControls.Button.OnClick(EventArgs e)
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEven tHandler.RaisePostBackEvent(String
eventArgument)
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler
sourceControl, String eventArgument)
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
System.Web.UI.Page.ProcessRequestMain()




------------------------------------------------------------ --------------------
Version Information: Microsoft .NET Framework Version:1.0.3705.6060; ASP.NET
Version:1.0.3705.6060

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#2: Re: Problem with queries... Call for help.

Posted on 2008-01-18 19:05:55 by reb01501

johnmay1248 wrote:
> I am having a problem with queries running in this code When I use
> the
> query "SELECT * FROM sample" the code runs and the data grid binds
> and shows
> the contents of the sample table. If I change the query to filter the
> results such as "SELECT * FROM sample WHERE (sales > 2000)" the code
> fails
> on - objDataReader =

There was no way for you to know it (except maybe by browsing through
some of the previous questions before posting yours - always a
recommended practice), but this is a classic asp newsgroup. ASP.Net is
a different technology from classic ASP. While you may be lucky enough
to find a dotnet-savvy person here who can answer your question, you
can eliminate the luck factor by posting your question to a newsgroup
where the dotnet-savvy people hang out. I suggest
microsoft.public.dotnet.framework.aspnet.
There are also forums at www.asp.net where you can find a lot of people
to help you.

--
Microsoft MVP -- ASP/ASP.NET
Please reply to the newsgroup. The email account listed in my From
header is my spam trap, so I don't check it very often. You will get a
quicker response by posting to the newsgroup.

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