ADO.NET :: Retrieving Bit Colum With Sqldatareader For Vb Class Property?
Oct 3, 2010
I have a vb class that reads a single row of data from an SQL view. I want to add a property to it that will expose the value of a new bit field. But whatever I do my class always returns the value "false".What am I doing wrong?
Public ReadOnly Property IsPublished() As Boolean
Get
Return valPublished
End Get
End Property
Here's the relevant line from my datareader: Me.valPublished = Convert.ToBoolean(theObjectReader("Authorised"))Authorised is my bit field. I have tried it with and without the "ConvertToBoolean" statement.When I response write the value of the property for rows where this field is true, it always shows false.
When I am using SqlDataReader class on that time without creating instance of the SqlDataReader Class I m using Command.ExecuteReader() Method. Why We not create the object of the SqlDataReader Class by using " new " Operator.We use like below:
SqlDataReader dr=cmd.ExecuteReader(); Why not we use this class like below:
i have a problem that only shows if EntityDataSource present on aspx pages ,interesting thing it's just occures when i'm refreshing the page (F5) or viewing it again and it's driving me crazy it's seems to be a bug with entity framework because i tried it with another project and i just get the same error:
Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information. Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
I'm trying to connect to a MS Access database, loop through all db tables and read the 'modified' timestamp, how to achieve that. Using 'Microsoft.Jet.OLEDB.4.0' driver and C#.
I need to read a Property/variable from outside the webpart usercontrol to determine a course of action. This is not the same as using the Property Editor.
I have numerous usercontrol webparts all accessing the database.
When minimised, I don't want the webpart to hit the database.
So, I need to either : detect within the usercontrol webpart itself that its chromstate is minimised and therefore not access the database (and)or from the Webpartmanager loop through webparts, determine those that are minimised and set a variable / property within the webpart to inform it not to access the database on postback.
Something like...(pseudoCode)
for (int i = 0 ; i < webpartmanager1.webparts.count ; i++ ) webpart wp = (webpart)webpartmanager1.webpart[i]; if (wp != null) if (wp.ChromeState == PartChromeState.Minimized) { // set a known variable in this particular webpart so it can determine whether to refresh its datagrid or gridview or whatever } }
OR Can a usercontrol webpart determine its own ChromeState ????
I have an interesting problem with a WCF Service I am creating. As background fodder my solultion uses MVC 3 RC2 as the web interface. I am developing the solution as an N-Tier application using the Entity Framework 4.0 with POCO Self Tracking Entities, repository and unit of work approach. I am using the STE's more as an advanced POCO since STE do not seem to play well as of yet in the real world as they were meant to and since they do seem to give me better interfacing with the DB through my layers still. Additionally, I am incorporating WCF into the solution as the backend for the models based on info I am reading and the fact that I will need to also access these services via a windows service app on the client computers.
So, I have a datastore which includes my edm and the repositories. The POCO STEs are generated in a separate layer in what I have called my Domain Models. Within my domain area I also have a Core app holding my utilities. I am currently incorporating an additional domain element as a WCF service using the RESTful template. This WCF will be servicing both my MVC controllers and a Windows Service app on the client computers.
Now, on to the problem: Within this solution I have an Entity Set of People (or Person?). Within that Entity set I have a chain of inherited entities as follows Person->User->StaffMember->Provider where Provider is the resultant child. Within my WCF I have a ProviderService, a StaffMemberService and a UserService. In each of these Services one of my OperationContracts is a Get(string id) amongst others. the Get(String id) contract is the one that is causing me problems. Within that Get(String id) contract I do the following for the User:
[Code]....
and for the Provider:
[Code]....
Now, what has gotten me completely confused is that the Provider one works like a charm. But if I use the UserService to call the User of the same Id (Since User is a base class for Provider, this should work) I get an error saying it was a bad service call. (The ProviderService, as stated works and returns all the correct data). When I debug it, the UserService Get(String id) function actually works as expected up to and through the return statement (ie the user variable actually contains all the proper data that I would expect on the call). It is only after the return that I get the web page giving me that error and points me to the help page for the service. (I am using the browser to view the results at this point only). </P><P>I am assuming it has something to do with serialization? But why is it displaying the derived class with all expected data, which yes does include the data not being displayed as a user data, I am calling the data using the same UserId. I am not expecting someone to inspect my code, but to be a traffic cop and point me in the direction I need to look.
I've create a custom attribute for my web pages... In the base page class I've created I'm trying to pull if that attribute has been set. Unfortunately it does not come back as part of the GetCustomAttributes function. Only if I explicitly use the typeof(myclass) to create the class. I have a feeling it's due to how asp.net classes are generated.
I have a vb.net application which I'm trying to run in VS 2008. The application builds successfully, however, when I try to debug the windows application it throws the following error, "Retrieving the COM class factory for component with CLSID {794D671E-F0F0-11D2-BEB0-009027438003} failed due to the following error: 80040154." I've been searching for a solution for a few days now with no luck. I've tried to register the referenced DLLs (w/regasm command), messed around with the configuration manager, etc. Also, please note that the application ran successfully in Windows XP, but it no longer seems to work since I've upgraded my OS to Windows 7 (I've tried to run the application in x64 and x84 platforms w/no luck). Also, I'm referencing the following DLLs:
I am developing an application in ASP.NET 3.5. i am exporting data to excel file using some interops dll's. earlier i have developed the applicaion in Windows 2003 Server. at that time i could able to export the data to excel file. but recently i have upgraded my pc to Vista version.it is working fine in my localhost. when i deploy the application in IIS iam getting this error. like "Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80070005.". can any one let me know the resolution for this error.
In my Code Behind I use several times this code below to bind and rebind (for refresh) e GridView after an insertion or other operations completed using EF objects.
Using a simple gridview.DataBind(); does not work because I call EF programmatically so I thought to use a Class to keep in memory this code that can create Objects for my GridView and call it how many time I need in my code avoiding redundancy.
It is working file in my system , but online it is showing error : Retrieving the COM class factory for component with CLSID {91493441-5A91-11CF-8700-00AA0060263B} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).
I am facing one problem that when i try to access a page in the website, i am getting the following error,
Retrieving the COM class factory for component with CLSID {58A02778-16FC-423D-91AC-4619BD71257F} failed due to the following error: 80040154.
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.Runtime.InteropServices.COMException: Retrieving the COM class factory for component with CLSID {58A02778-16FC-423D-91AC-4619BD71257F} failed due to the following error: 80040154.
I went to that particular class file which is in the form of dll and in codebehind page of that class , builded the application, but it is not showing any compile time errors, but i put a break point it fails.
Retrieving the COM class factory for component with CLSID
{11BD5260-15B6-412D-80DB-12BB60B8FE50} failed due to the following error: 80070005. 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.UnauthorizedAccessException: Retrieving the COM class factory for component with CLSID {11BD5260-15B6-412D-80DB-12BB60B8FE50} failed due to the following error: 80070005.
ASP.NET is not authorized to access the requested resource. Consider granting access rights to the resource to the ASP.NET request identity. ASP.NET has a base process identity (typically {MACHINE}ASPNET on IIS 5 or Network Service on IIS 6) that is used if the application is not impersonating. If the application is impersonating via <identity impersonate="true"/>, the identity will be the anonymous user (typically IUSR_MACHINENAME) or the authenticated request user.
To grant ASP.NET access to a file, right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the appropriate user or group. Highlight the ASP.NET account, and check the boxes for the desired access.
While trying execute the above code in server, I am getting COM class factory error, as mentioned below
System.Runtime.InteropServices.COMException (0x80040154): Retrieving the COM class factory for component with CLSID {91493441-5A91-11CF-8700-00AA0060263B} failed due to the following error: 80040154.
My system configuration is Windows Server 2008 64bit. The solution for this issue is mentioned in [URL] As part of solution mention in above link, I cannot find the Microsoft Excel Application in the DCOM Config item. Does anyone know how to fix this issue? Or is there any alternative approach to fix this?
My Crystal Reports works perfectly when I have it on my local host, once I upload it to the server I get the error listed below. I ran the following MSI on the dedicated server: CRRedist2008_x86.msi.. If it is a permission issue, I am using Plesk Panel so there is no ASPNET user, it is different users, what user and what specific folder do I have to give permissions to? Retrieving the COM class factory for component with CLSID {5FF57840-5172-4482-9CA3-541C7878AE0F} failed due to the following error: 80070005.
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.UnauthorizedAccessException: Retrieving the COM class factory for component with CLSID {5FF57840-5172-4482-9CA3-541C7878AE0F} failed due to the following error: 80070005.
ASP.NET is not authorized to access the requested resource. Consider granting access rights to the resource to the ASP.NET request identity. ASP.NET has a base process identity (typically {MACHINE}ASPNET on IIS 5 or Network Service on IIS 6) that is used if the application is not impersonating. If the application is impersonating via <identity impersonate="true"/>, the identity will be the anonymous user (typically IUSR_MACHINENAME) or the authenticated request user. To grant ASP.NET access to a file, right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the appropriate user or group. Highlight the ASP.NET account, and check the boxes for the desired access.
I am using Excel interop (Excel 2003) for excel import and export in my asp.net(2.0) application. When i deploy it in the server and when i try to import, i am getting the following error Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 8000401a
"Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80070005."
"at WebApplication1._Default.GenerateExcel(String xmlString) in E:\TestWebApp\WebApplication1\WebApplication1\Default.aspx.cs:line 110 at WebApplication1._Default.Page_Load(Object sender, EventArgs e) in E:\TestWebApp\WebApplication1\WebApplication1\Default.aspx.cs:line 30 at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)"
Retrieving the COM class factory for component with CLSID {4DB2E2BB-78E6-4AEA-BEFB-FDAAB610FD1B} failed due to the following error: 80070005 Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)).
