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vb.net controls : Connection Property error
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.InvalidOperation Exception: ExecuteReader: Connection property has not been initialized. Source Error: Line 142: Line 143: drStores = cmdStores.ExecuteReader() Line 144: ddlStores.DataSource = drStores Line 145: ddlStores.DataTextField = "stor_name" Any suggestions on how to resolve this error? Thanks, T.
Suresh,
VS.Net VB.Net I was in the Form view and I notice that the cmdStores Connection Property was set to conPubs. After the program is ran, the Connection Property changes back to none. Here is my code: Dim drStores As SqlClient.SqlDataReader If Not IsPostBack Then conPubs.Open() drStores = cmdStores.ExecuteReader() ddlStores.DataSource = drStores ddlStores.DataTextField = "stor_name" ddlStores.DataBind() drStores.Close() End If End Sub Thanks, T. [quoted text, click to view] "Suresh" <anonymous@discussions.microsoft.com> wrote in message cmdStores object prior to executing this line drStores =news:69814EAE-5550-4CDA-8632-AFB7AA634DFC@microsoft.com... > Make sure a connection object has been opened and assigned to your cmdStores.ExecuteReader(). [quoted text, click to view] > > You should have something like the following(I'm assuming you are using SQLCommand) > > SqlConnection sqlCon = new SqlConnection(Your SQL Connection String); > sqlCon.Open(); > > cmdStores.Connection = sqlCon; > ... > ... > drStores = cmdStores.ExecuteReader(). > > HTH, > Suresh. > > ----- Taishi wrote: ----- > > ExecuteReader: Connection property has not been initialized. > > 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.InvalidOperation Exception: ExecuteReader: > Connection property has not been initialized. > > Source Error: > > Line 142: > Line 143: drStores = cmdStores.ExecuteReader() > Line 144: ddlStores.DataSource = drStores > Line 145: ddlStores.DataTextField = "stor_name" > > > Any suggestions on how to resolve this error? > > Thanks, > T. > > > >
Taishi-
You need to Open the connection before calling ExecuteReader. You should also Close the connection when done... Steve Stein VB Team This posting is provided "AS IS" with no warranties and confers no rights. -------------------- [quoted text, click to view] >From: "Taishi" <taishi_bak@hotmail.com> microsoft.public.certification.visualstudio,microsoft.public.dotnet.framewor>Subject: Connection Property error >Date: Wed, 11 Feb 2004 12:03:12 -0600 >Lines: 24 >X-Priority: 3 >X-MSMail-Priority: Normal >X-Newsreader: Microsoft Outlook Express 6.00.2800.1106 >X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 >Message-ID: <OgSyNlM8DHA.2316@TK2MSFTNGP09.phx.gbl> >Newsgroups: k,microsoft.public.dotnet.framework.aspnet,microsoft.public.dotnet.languages .vb,microsoft.public.dotnet.languages.vb.controls,microsoft.public.vstudio.d evelopment [quoted text, click to view] >NNTP-Posting-Host: 192.131.85.169 cpmsftngxa07.phx.gbl!cpmsftngxa06.phx.gbl!TK2MSFTNGXS01.phx.gbl!TK2MSFTNGXA0>Path: 5.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP09.phx.gbl [quoted text, click to view] >Xref: cpmsftngxa07.phx.gbl microsoft.public.dotnet.framework:64881 microsoft.public.dotnet.framework.aspnet:209348 microsoft.public.dotnet.languages.vb:180549 microsoft.public.dotnet.languages.vb.controls:3984 microsoft.public.vstudio.development:4332 microsoft.public.certification.visualstudio:3769 [quoted text, click to view] >X-Tomcat-NG: microsoft.public.dotnet.languages.vb.controls
> >ExecuteReader: Connection property has not been initialized. > >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.InvalidOperation Exception: ExecuteReader: >Connection property has not been initialized. > >Source Error: > >Line 142: >Line 143: drStores = cmdStores.ExecuteReader() >Line 144: ddlStores.DataSource = drStores >Line 145: ddlStores.DataTextField = "stor_name" > > >Any suggestions on how to resolve this error? > >Thanks, >T. > > > >
Thanks Steven.
I also found another problem. I had a DataSet defined in the Form and in the code. It's working!! Finally!!! Why can't you have it defined in both places? T. [quoted text, click to view] ""Steven Stein [MSFT]"" <sstein@online.microsoft.com> wrote in message news:4UR9ERM9DHA.1988@cpmsftngxa07.phx.gbl... > Taishi- > > You need to Open the connection before calling ExecuteReader. > > You should also Close the connection when done... > > > Steve Stein > VB Team > > This posting is provided "AS IS" with no warranties and confers no rights. > > > -------------------- > >From: "Taishi" <taishi_bak@hotmail.com> > >Subject: Connection Property error > >Date: Wed, 11 Feb 2004 12:03:12 -0600 > >Lines: 24 > >X-Priority: 3 > >X-MSMail-Priority: Normal > >X-Newsreader: Microsoft Outlook Express 6.00.2800.1106 > >X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 > >Message-ID: <OgSyNlM8DHA.2316@TK2MSFTNGP09.phx.gbl> > >Newsgroups: > microsoft.public.certification.visualstudio,microsoft.public.dotnet.framewor > k,microsoft.public.dotnet.framework.aspnet,microsoft.public.dotnet.languages > vb,microsoft.public.dotnet.languages.vb.controls,microsoft.public.vstudio.d > evelopment > >NNTP-Posting-Host: 192.131.85.169 > >Path: > cpmsftngxa07.phx.gbl!cpmsftngxa06.phx.gbl!TK2MSFTNGXS01.phx.gbl!TK2MSFTNGXA0 > 5.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP09.phx.gbl > >Xref: cpmsftngxa07.phx.gbl microsoft.public.dotnet.framework:64881 > microsoft.public.dotnet.framework.aspnet:209348 > microsoft.public.dotnet.languages.vb:180549 > microsoft.public.dotnet.languages.vb.controls:3984 > microsoft.public.vstudio.development:4332 > microsoft.public.certification.visualstudio:3769 > >X-Tomcat-NG: microsoft.public.dotnet.languages.vb.controls > > > >ExecuteReader: Connection property has not been initialized. > > > >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.InvalidOperation Exception: ExecuteReader: > >Connection property has not been initialized. > > > >Source Error: > > > >Line 142: > >Line 143: drStores = cmdStores.ExecuteReader() > >Line 144: ddlStores.DataSource = drStores > >Line 145: ddlStores.DataTextField = "stor_name" > > > > > >Any suggestions on how to resolve this error? > > > >Thanks, > >T. > > > > > > > > >
Hi Taishi-
The dataset on your form is the same dataset that is declared in code. The form designer and controls are a visual representation of the code. Steve Stein VB Team This posting is provided "AS IS" with no warranties and confers no rights. ------------------- [quoted text, click to view] >From: "Taishi" <taishi_bak@hotmail.com> cpmsftngxa07.phx.gbl!cpmsftngxa06.phx.gbl!TK2MSFTNGXS01.phx.gbl!TK2MSFTNGXA0>References: <OgSyNlM8DHA.2316@TK2MSFTNGP09.phx.gbl> <4UR9ERM9DHA.1988@cpmsftngxa07.phx.gbl> >Subject: Re: Connection Property error >Date: Tue, 17 Feb 2004 10:16:57 -0600 >Lines: 85 >X-Priority: 3 >X-MSMail-Priority: Normal >X-Newsreader: Microsoft Outlook Express 6.00.2800.1106 >X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 >Message-ID: <eWyv8FX9DHA.972@tk2msftngp13.phx.gbl> >Newsgroups: microsoft.public.dotnet.languages.vb.controls >NNTP-Posting-Host: 192.131.85.191 >Path: 5.phx.gbl!TK2MSFTNGP08.phx.gbl!tk2msftngp13.phx.gbl [quoted text, click to view] >Xref: cpmsftngxa07.phx.gbl
microsoft.public.dotnet.languages.vb.controls:4036 >X-Tomcat-NG: microsoft.public.dotnet.languages.vb.controls > >Thanks Steven. > >I also found another problem. I had a DataSet defined in the Form and in >the code. > >It's working!! Finally!!! > >Why can't you have it defined in both places? > >T. > >""Steven Stein [MSFT]"" <sstein@online.microsoft.com> wrote in message >news:4UR9ERM9DHA.1988@cpmsftngxa07.phx.gbl... >> >> >> You need to Open the connection before calling ExecuteReader. >> >> You should also Close the connection when done... >> >> >> Steve Stein >> VB Team >> >> This posting is provided "AS IS" with no warranties and confers no rights. >> >> >> -------------------- >> >From: "Taishi" <taishi_bak@hotmail.com> >> >Subject: Connection Property error >> >Date: Wed, 11 Feb 2004 12:03:12 -0600 >> >Lines: 24 >> >X-Priority: 3 >> >X-MSMail-Priority: Normal >> >X-Newsreader: Microsoft Outlook Express 6.00.2800.1106 >> >X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 >> >Message-ID: <OgSyNlM8DHA.2316@TK2MSFTNGP09.phx.gbl> >> >Newsgroups: >> >microsoft.public.certification.visualstudio,microsoft.public.dotnet.framewo r >> >k,microsoft.public.dotnet.framework.aspnet,microsoft.public.dotnet.language s >> >vb,microsoft.public.dotnet.languages.vb.controls,microsoft.public.vstudio.d >> evelopment >> >NNTP-Posting-Host: 192.131.85.169 >> >Path: >> >cpmsftngxa07.phx.gbl!cpmsftngxa06.phx.gbl!TK2MSFTNGXS01.phx.gbl!TK2MSFTNGXA 0 >> 5.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP09.phx.gbl >> >Xref: cpmsftngxa07.phx.gbl microsoft.public.dotnet.framework:64881 >> microsoft.public.dotnet.framework.aspnet:209348 >> microsoft.public.dotnet.languages.vb:180549 >> microsoft.public.dotnet.languages.vb.controls:3984 >> microsoft.public.vstudio.development:4332 >> microsoft.public.certification.visualstudio:3769 >> >X-Tomcat-NG: microsoft.public.dotnet.languages.vb.controls >> > >> >ExecuteReader: Connection property has not been initialized. >> > >> >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.InvalidOperation Exception: ExecuteReader: >> >Connection property has not been initialized. >> > >> >Source Error: >> > >> >Line 142: >> >Line 143: drStores = cmdStores.ExecuteReader() >> >Line 144: ddlStores.DataSource = drStores >> >Line 145: ddlStores.DataTextField = "stor_name" >> > >> > >> >Any suggestions on how to resolve this error? >> > >> >Thanks, >> >T. >> > >> > >> > >> > >> > > >
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