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• How to manage changes to reports in .NET?

  - by Craig Johnston

  If I need to offer the ability to create, view and print reports from a .NET app, I see that there are 2 options: use a reporting component such as Microsoft.Reporting.WinForms.ReportViewer or Crystal Reports which saves a .rpt or similar template file that can be modified as required without having to re-compile the app use System.Drawing.Printing for reporting and store report template data in a database, which keeps things simpler and avoids problems with bulky third party reporting components If I want to be able to modify a report template (which would include layout and data fields) without having to re-compile the app, would the first option above achieve this? If I wanted to be able to modify the template without re-compiling the app, how could this be achieved with the second option? How could you store data representing the templates in a database such that it could be modified without having to re-compile the app?

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• Can splitting .MDB files into segments help with stability?

  - by Craig Johnston

  Is this a realistic solution to the problems associated with larger .mdb files: split the large .mdb file into smaller .mdb files have one 'central' .mdb containing links to the tables in the smaller .mdb files How easy would it be to make this change to an .mdb backed VB application? Could the changes to the database be done so that there are no changes required to the front-end application?

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• What error handling should be used in VB.NET

  - by Craig Johnston

  What error handling should be used in VB.NET? Should you use the "On Error Goto ErrorHandler ... Exit Sub ErrHandler ... End Sub" pattern or should you use the "try { ... } catch { ... } finally { ...}" pattern?

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• What license do I need to use gSOAP in a commercial product?

  - by Lawrence Johnston

  I'd like to use gSOAP in a product which will be distributed commercially. The use I have in mind is what I suspect is a pretty typical workflow—generating a header using wsdl2h, consuming the header with soapcpp2, and then calling the functions generated in the stub in my code. I'm not 100 percent sure which license(s) I need to use to be able to do this. Has anybody here already gone through this and figured out the solution?

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• Why is it necessary to remove and then re-add a user to a SQL Server database after restoring it fro

  - by Craig Johnston

  Why is it necessary to remove and then re-add a user to a SQL Server database after restoring it from a file? If I don't do this, I get a "User login failed" when trying to access the database using this username from apps.

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• .NET: what does "throw;" by itself do?

  - by Craig Johnston

  What would be the point of just having: catch (Exception) { throw; } What does this do?

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• .NET: Is it possible to log calls of .NET assembly methods?

  - by Craig Johnston

  Is it possible to log calls of .NET methods made while an application is running?

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• If a DLL or OCX is registered by a non-administrator user and regsvr32 says it succeeds, could it st

  - by Craig Johnston

  If a DLL or OCX is registered by a non-adminstrator user and regsvr32 says it succeeds, could it still fail to be registered properly?

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• Upload File to Database in ColdFusion

  - by George Johnston

  I simply would like to upload a file to my database using ColdFusion. I understand how to upload an image to a directory, but I would like to place it directly in the database. I have set a database field to varbinary(MAX) to accept the image and have the stored procedure to insert it. Currently my code for uploading the image to my file system is: <cfif isdefined("form.FileUploadImage")> <cffile action="upload" filefield="FileUploadImage" destination="#uploadfolder#" nameconflict="overwrite" accept="image/*" > </cfif> I've obviously left some of the supporting code out, but really all I need to do is get a binary representation of the file stored in memory, instead of the file system. Any experts out there that can help? Thanks, George

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• What do Repair and Compact operations do to an .MDB? Will they stop an application crashing?

  - by Craig Johnston

  What do Repair and Compact operations do to an .MDB? If these operations do not stop a 1GB+ .MDB backed VB application crashing, what other options are there? Why would a large sized .MDB file cause an application to crash?

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• What is the simplest http client in .NET?

  - by Craig Johnston

  What is the simplest http client in .NET? I simply want to put in the url have it return the page as a string.

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• Access a webservice behind a membership provider

  - by George Johnston

  I have one website that hosts a webservice which uses membership provider authorization. I would like to be able to authenticate through my webservice call from a second site without getting bounced back to my login page on the webservice site. How can I accomplish this?

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• C#: is there way for a class to 'remove' methods that it has inherited

  - by Craig Johnston

  Is there way for a class to 'remove' methods that it has inherited? eg. If I don't want my class to have a ToString() method can I do something so that it is no longer available?

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• C#: can you add to an enum type in run-time

  - by Craig Johnston

  If I have the enum type: Public enum Sport { Tennis = 0; Football = 1; Squash = 2; Volleyball = 3; } Can I somehow add during run-time: PingPong = 4

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• Numeric representation of a color

  - by George Johnston

  What would be the best format to numerically represent a color in .NET so that I wouldn't have to use the Color object? Right now I am saving the color as a the HTML representation, but in order to use it I have to parse it out. I am dealing with a 800x600 canvas that stores a color value for each pixel and I need to be able to render the color out as quick as possible without bloating my application out to storing 500k+ color objects.

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• C#: why does the string type have a .ToString() method

  - by Craig Johnston

  C#: Why does the string data type have a .ToString() method?

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• How can I serve subversion from my IIS 7 server?

  - by George Johnston

  I set up subversion on my Windows 2008 server and it works fine locally, but when on a remote machine, I would like to be able to access my repository by using the URL of a website hosted on my server. Any idea how I can set that up?

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• Will existing DAO code work against a SQL Server?

  - by Craig Johnston

  If I transfer data from a Access MDB into a SQL Server, will DAO code in a VB app work against the SQL Server. I realise there will need to be changes to the initial connection calls but will anything else need to change?

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• What is an easy to list the foreign key contraints in an MDB?

  - by Craig Johnston

  What is an easy to list the foreign key contraints in an MDB? Is there a system table that can be queried in order to list this information? Specifically, I need to know whether any foreign key contraints exist in the MDB.

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• How often should a programmer communicate with management?

  - by George Johnston

  I struggle with finding a good medium on communication. In our jobs, it seems like it's very easy to get lost in code and lose track of time. It also seems kind of ridiculous to send out updates for every tiny task. Even though I am working very hard on getting things done, in a company that has very active communication between other branches, it tends to look bad for me when I'm not constantly updating my status. However, if I'm working on a 3-4 hour project, I'm not going to update management for every single line of code that I output. Broad I know, depends on the people, company, etc, but what would be a good general rule of thumb for effective communication?

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• Color single pixel in XNA

  - by George Johnston

  Give a Point, how can I color a single pixel in XNA?

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• SQL: HAVING clause

  - by Craig Johnston

  See the following SQL statement: SELECT datediff("d", MAX(invoice.date), Now) As Date_Diff, MAX(invoice.date) AS max_invoice_date, customer.number AS customer_number FROM invoice INNER JOIN customer ON invoice.customer_number = customer.number GROUP BY customer.number If the the following was added: HAVING datediff("d", MAX(invoice.date), Now) > 365 would this simply exclude rows with Date_Diff <= 365? What should be the effect of the HAVING clause here?

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• What are some good Xcode scripts to speed up development?

  - by Lawrence Johnston

  Xcode allows you to create automated scripts for performing repetitive tasks. What scripts have you written to speed up development?

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• Is it possible to produce a small preview or thumbnail image of a Crystal report in code?

  - by Lawrence Johnston

  I'm using Crystal to display the reports in my project, and I'd like to be able to display a small preview or thumbnail image of the report to the user when he or she is picking a report to display from my UI. Is there any way to produce these thumbnails dynamically from code? The user has the option to add or remove reports by adding or removing them from the reports folder, so just making all the thumbnail images by hand isn't really an option.

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• C#: how to construct strings

  - by Craig Johnston

  Which of these will achieve the correct result: (1) int X = 23; string str = "HELLO" + X.ToString() + "WORLD"; (2) int X = 23; string str = "HELLO" + X + "WORLD"; (3) int X = 23; string str = "HELLO" + (string)X + "WORLD"; EDIT: The 'correct' result is to output: HELLO23WORLD

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