Creating Objects From C# Class To Use Them In Database Functions?

Nov 25, 2010

I have created class in C# i need to use objects from this class to add them to a databse table.

the information come from textbox go into the object of the class than from this object i want to preform databse function.

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i have the following code:

[Code]....

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How do i instantiate the object ?

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Creating An Abstract Class That Will Define All Database Manipulation Methods To Implement

Mar 3, 2010

I am developing a couple of small ASP.NET application and would like to know what pattern. approach do you use in your projects.

My projects involve databases, using Data access and Business logic layers.

The data-access approach that I was using so far is the following(I read in some book and liked it):

For DAL layer:

Creating an abstract class that will define all database manipulation methods to implement.
The abstract class will contain a static "Instance" property, that will load (if instance == null) an instance (Activator.CreateInstance) of the needed type (a class that implements it).

Creating a classes that implement this abstract class, the implementation will be according to the databases (SQL, mySQL and etc) in use.

With this I can create different implementation according to database in use.

For BLL layer:

A class that encapsulates all all retrieved fields , and static methods that will call the DAL classes.

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The function is protected, I dont need it outside of this class. Its only purpose is to build an URL from an given object.

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May 14, 2010

I have a base class called BasePage, and a master page called SiteMaster. All my content pages inherit BasePage using BasePage instead of System.Web.UI.Page. Now, I need to access some functions in BasePage from my master page SiteMaster, let's say, the function is called "DisplayClientName()". How can I do it? Searched the Web, have found tons of similar questions but not solid solutions.

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Oct 2, 2010

I have an existing web application that uses EF and POCO objects. I want to improve the client experience by exposing some of my objects through WCF(JSON). I have this working fine but where I am unsure is how to handle derived objects(not sure if that is the correct term) or IEnumerable anonymous objects if you will.

Let's say I have 3 tables structured like so:

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ID
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Groups

ID
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ID
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This is obviously a one-to-many type relationship. I have my navigation properties setup correctly and getting strongly typed object properties works great. However, how do I send serialized anonymous type object(s) over the wire. Like an object that sends all instances that are equal to groupid=1 and include the names of the template and the object.Am I missing something or do I have to create another class object for WCF that would look like this:

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I guess I could alter my tables to account for this but that seems wrong too. I know that IEnumerable objects can't be serialized and I know that throw away objects are probably not the way to go either. I want to do this the right way but I am not sure how to go about it.

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Apr 22, 2010

I'm trying to create a class, DataCommon, to contain all my SQL Data manipulation functions. I've created a Subroutine called Init that initializes a SQLDataAdapter:

[Code]....

From my other classes I am creating an instance of DataCommon, calling Init, and calling another subroutine in DataCommon that pulls data from SQL and loads the data into my dataset. This part is working great -- no problems at all. I'm loading three different Datatables in the Dataset with no issues.

At this point, I'll perform my various manipulations on the datatables -- add/delete/modify rows -- again with no problems. All of this is creating postbacks...and this is where my problem begins. After I've done all my manipulations to the data and am ready to update my SQL tables, I have to re-initialize my SQLDataAdapter. I thought I could do something like:
[Code]....

But I get the error: Exception inserting Class. Thread was being aborted.

In my initial data load from SQL, each datatable is getting loaded from a single SQL table, so I was hoping to use the autogenerated Update/Insert/Delete statements by the SQLDataAdapter. As a test, as soon as I filled the dataset initially, I added a new row to one of the datatables and used the SQLDataAdapter.Update() method before a postback occurred, and it worked perfectly.

So, with all that being said, I guess my question is, how do I reconnect the table mappings between my SQLDataAdapter and dataset to autogenerate the updates after a postback occurs? I've tried researching this, but I get confused after reading about FillSchema vs TableMappings vs everything else I've read about.

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Here is the post method before editing:

[Code]....

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[code]...

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Below is my class file.

[Code]....

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Is there any tool available to create classes directly from web services in ordered way....

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