Architecture :: Option To Using Enums And Switch Statements?
Oct 26, 2010
Is there any design pattern or architectural design that prevent the following type of code, where I have an enum with different fileformats and I have to make a switch anywhere I want to distinguish between the different fileformats?
[Code]....
If add an item to the enum definition in this case I have to change all the code that uses switches and that kind og enum which, I guess, is a bad approach in terms on maintenance of the application?
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Jul 2, 2010
I have an enum:
public enum Status
{
Incomplete = 1, Complete = 2, Cancelled = 3, Deleted = 4
}
Now on a certain page I wish to list this enum in a checkboxlist. This would be fine except that I want the text of each checkbox to display different text than the enum.
i.e the check boxes should say:"Not Processed" instead of "Incomplete"
"Processed" instead of "Complete"
"Void" instead of "Cancelled"
Is it possible to put this enum in a foreach and then switch on the status and update the text. Like so:var statuses = Enum.GetNames(typeof(Status));
foreach (var status in statuses)))
{
switch (status) [code]....
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Nov 12, 2010
I have a design question about whether to use sql tables or enums or both for a application I am developing for work.
Example - Gallery
Let say you have a database for displaying albums and photos. You want the ability to allow the user to set the display mode for the photos differnently in their albums i.e. LightBox, Scrolling, Single
Do you create an enum for DisplayModes so you can for example:
[Code]....
But then for reporting and admin you need to know the Album DisplayMode, so do you then have a SQL Table that just repeats the values of the enum?
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May 25, 2010
We are developing SOA based application using .NET 3.5 and WCF & WPF.
One common issue we are facing is mapping between WCF enum and WPF enums. We had to do mapping between WCF enums to WPF enums. Following is sample code
Switch(WCFServiceObject.Status)
{
Case WCFServiceStatus.Married[code]....
You can see that we have to do mapping WPF and WCF enums. Is there any easiest way to achieve this mapping without writing tedious switch statements? One way of doing this is using Dictionary, but apart from this, is there any good way? We have lots of enums for which have to do mappings.
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Feb 6, 2010
there's an .aspx page that does absolutely nothing in the codebehind, but contains the markup for the page in the Design View. Then we have an .asmx web service that receives requests with JSON content-type. These are called by the JavaScript in the page. This web service returns .NET objects serialized to JSON in response to these JavaScript Ajax HTTP POSTs. I'd like to switch to MVC but am not sure to how switch this architecture. Basically what we're doing is two things:
1) Replying to GET /MyPage.aspx with HTML markup that represents the page
2) Replying to POST /MyPage.aspx/WebMethodName requests with .NET objects serialized to JSON.
It seems like MVC would be a good way to eliminate the need for a Page object (again, the codebehind isn't used--only the HTML markup in the .aspx file is) and an .asmx web service. No? What do I need to start changing to accomplish this switch? Is it straight-forward? Painful? Someone at work already has an MVC page running in the same directory as my Web Forms .aspx and .asmx web service, but I don't see anything in the directory about Routes, so I'm confused. He's got a Views, ViewModels, and Controllers subdirectories.
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Feb 23, 2011
I'm using the 'Configure Data Source' wizard to connect to my database and show the dataset in Gridview. I want to be able to update, insert and delete entries but am unsure how to build the query. I can write simple update statments to change database entries but how can I do this for entries that have been changed within the gridview?
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May 15, 2010
i heard that Enums are very useful while we are developing the Project.
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Oct 25, 2010
Up until now I've been using the Session object to store the currently logged on user and using a strongly typed wrapper class to access it. I've been reading up on using the Session object in MVC, and it seems frowned upon (especially for user authentication), so I want to look at using forms authentication instead, but I'm not quite sure how to use it.
One issue I have is that I validate a user's permission level using an enum, whereas all the examples on forms authentication I've found use a "roles" object which is just a string. Can I still implement it using enums?
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Sep 23, 2010
I have a base class with the the following enum and property:
Public Enum InitType
Focus = 0
Help = 1
ErrorToolTip = 2
End Enum
[Code]....
First off, how do I do this - is it by simply overloading it? And secondly will my original property pick up the new enum automatically when using the derived class or will I need to overload that too?
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May 4, 2010
I was given a web app written in VB.net. I am using VS2008. The project has a Global.asax page with Enums declared
Example:Public Enum eCurrentLoc as Integer
Admins
AdminTools
Home
LogIn
Status
End Enum
But in the web application itself I get errors on this line of code:
Ads = Global.eCurrentLoc.Admins
I get the blue scwigly line under Global.eCurrentLoc
The error states 'eCurrentLoc' is not a memeber of '<Defaults>'
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Dec 22, 2010
I have a page which is accessible only from Monday to Friday. If i try to open it on Saturday or Sunday it shouldn't.I have a column in my DB naming WorkingDays and iam storing Bitwise value
Monday=1,Tuesday=2,Wednesday=4,Thursday=8....
So the value in my DB is 31 which is equal to Monday to Friday.If i open the page on saturday how should i check?
How should i convert todays day to bitwise value and how should i compare with the DB value.
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Oct 6, 2010
The .NET Framework contains an Enum called DayOfWeek.so now if i have an integer 7how can i ge the string "Saturday" using the enum?
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Jun 29, 2010
I have a dynamic dropdown that is populated from sql. The user is supposed to select an option from the dropdown, then click a search button on the form to return some results based on that selection. It works fine if the dropdown gets populated with more than one record. However, if only one record is returned, that one record can't be selected. Whether you select it or just leave it alone since it's the only one, when you click the form button (search button), no results are returned b/c the dropdown selection must not be actually selected.
I've included the relevant code below. First the DDL, then the datasource, and finally the C# code in the if (!Page.IsPostBack)
[Code]....
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Jan 27, 2011
i defined an enum with the [flags] attribute and binded it to a checkboxlist.
my question is how can i insert the selected items to a list?
this is my code:
[Code]....
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Jan 3, 2011
string sqlstring =
"SELECT DISTINCT STAFF_ID, SCHOOL_CODE FROM MODULE_TIMETABLE_STAFF WHERE STAFF_ID != '" +userId +
"' AND STAFF_ID LIKE '%" + Searcht +
"%' ORDER BY STAFF_ID ASC";
can anyone explain this statement for me? especiallythese signs !=,+ +
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Oct 4, 2010
I am looking details on the internal working of asp.net architecture. The topics need to include the following:
Asp.Net Thread/Application Pools HttpRuntime HttpApplication - When and how it is set up How HttpContext is set up How objects can passed along the pipeline using HttpContext.Current.Items Why does modification of static variables requires locks in ASP.NET (advanced)IIS 7 Integration Mode
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Feb 9, 2010
I want to add Sum contents from the two tables, Realize the rows could be different, Only like rows to be added rest of the rows from both tables are listed.
SELECT TYPE AS CashFlow, Sum(AceData.InCredit) AS Credit, Sum(AceData.OutDebit) AS Debit, Sum([InCredit]+[OutDebit]) AS Totals
FROM AceData
where case=1
GROUP BY Type;
CashFlow Credit Debit Totals
Advert $0.00 ($5,816.52) ($5,816.52)
BOND $0.00 ($3,060.00) ($3,060.00)
Cash $18,619.57 ($34,824.75) ($16,205.18)
Charity $0.00 ($6,578.00) ($6,578.00)
DayCare $0.00 ($2,360.00) ($2,360.00)
SELECT TYPE AS CashFlow, Sum(AceData.InCredit) AS Credit, Sum(AceData.OutDebit) AS Debit, Sum([InCredit]+[OutDebit]) AS Totals
FROM AceData
where case=2
GROUP BY Type;
CashFlow Credit Debit Totals
BOND $0.00 ($3,060.00) ($3,060.00)
Cash $18,619.57 ($34,824.75) ($16,205.18)
Charity $0.00 ($6,578.00) ($6,578.00)
DayCare $0.00 ($2,360.00) ($2,360.00)
Entertainmen $0.00 ($12,258.18) ($12,258.18)
Equipment $0.00 ($7,085.00) ($7,085.00)
Fee $1,957.63 ($27,611.85) ($25,654.22)
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Aug 2, 2010
How can I schedule several statements that involve select ... into ..., delete, and exec one other stored proc, periodically? For instance, every 6 hours, in Sql server DB
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Jan 2, 2011
i want to execute more than one query in a page.i tried to use sqlreader it didnt allow me to include.how to do ?This is my code.
[Code]....
this is how i did.it shows me error.how to solve this error?
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Apr 16, 2010
I'm using MySql in my asp.net project. But I don't want to type every "using MySql.Data.MySqlClient;" statement in every aspx.cs/aspx.vb file. How can I define this lines in web.config file?
I've defined some namespaces like below but this only works for aspx pages:
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="false" targetFramework="4.0"/>
<pages>
<namespaces>
<add namespace="System.Web.Configuration"/>
<add namespace="MySql.Data"/>
<add namespace="MySql.Data.MySqlClient"/>
</namespaces>
</pages>
</system.web>
</configuration>
related question : Define common namespaces for code pages in Web.Config
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Feb 10, 2011
Is there any difference between below two statements
if (null != obj)
and
if (obj != null)
Edit: if both treated same which will be preferable?
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Sep 22, 2010
i want to create a centralised business or Service authendication architecture in .net. for example, we have a clients like c1, c2, c3, c4, ... etc. everybody logins seperatly as well as grouply. ie, if client "C1" logins [with login authentication] he can access c2 , c3, c4 also without login authendication. So its like a google. if we enters gmail account, we can access orkut, picasa like that.. i need the cetralised architecture.
And, client "c1" seperately asks seperately how will be the authendication architecture.
so give me the single solution for both these two scenarios. how will be the architecture for these two and how is the Data Base (Login) Structure.
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Dec 25, 2010
recently i've studied on ADO.NET's Entity Model Framework and say 'wow' as ORM is one of the fevourite pattern i practice..but suddenly i've come to an ambiguous situation when i'm going to start. i usually follow the following 3-tier architecture..
1. UI Layer
2. BLL - business logic layer
3. DAL - Data Access Layer
a. DTO / DAO
b. Gateway (contains the sql query/stored procedure and connection with DB)
now when i'm going to use the Entity Model Design,where the DBML/ .edmx File should be placed? Because many a times i'm using the DBML file as DTO because of the mapped objects.. in the same time, sometimes DBML ( .edmx file in .NET 4.0) contains CRUD methods and stored procedured method as well as methods with different selection operations,- which should be in Gateway. so where the .edmx file should be placed !?!! IN DTO namespace !? or in Gateway namespace!
moreover sometimes there is no need for the BLL which breaks the rules of inter-layer-communication (UI > BLL > DAL.Gateway)! what makes me confuse is, what should be the ideal n-tier architecture when i'll use the ADO.NET Entity Model Design Framework
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Jul 30, 2010
I am working on 3 tier architecture: UI, BL, DAL. In my UI i have following code for Asynchronous page processing:
[Code]....
But I want a database fetch operation to be performed in this asyncronous method. And due to 3 tier arch. i am unable to do this in UI Layer. Can anyone guide me that how can I implement Asynchronous processing in 3 tier architecture? Note: If you are going to place EndAsyncWork1 in DAL then show that how can I return a value back to UI layer from this function.
[Code]....
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May 20, 2010
I want to know that What are the factors if we use methods on each .cs page for connection and executing query on each aspx code behind page rather then using BAL .
How our application get affected in terms of performance and speed or other way?
when we put our website on server after publish/compile in general approach (using query in C# code behind) rathor than using stored procedures?
then which logic is better and why ?
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