Apply Same Logic To Multiple Entity Objects?

Oct 26, 2011

I have about 20 different report tables in my Entity Data Model that all have a few common fields (like start_date and end_date). When my reporting application pulls data for a given report, the first thing I do is filter the table for today's date. This means I have code blocks similar to this throughout my code (VB)[code]...

Is there a way to create a single generic function that can apply some logic to different objects and return that specific object instead of a generic one? Alternatively, is there a way to cast the return value back to the specific entity object type?

View 1 Replies


ADVERTISEMENT

Entity Data Model & DataGridView - Creating New Objects?

Mar 30, 2010

I'm pretty new to the EDM, so bear with me. I have a windows form that has a DataGridView on it that's bound from the EDM I created. I figured out how to update my changes fine, but it's when the user creates a new row that I'm having a problem.I tried numerous ways and many google searches, but came up with nothing so far.

[Code]...

Error (occurs when calling _Context.SaveChanges()): Store update, insert, or delete statement affected an unexpected number of rows (0). Entities may have been modified or deleted since entities were loaded. Refresh ObjectStateManager entries.

View 2 Replies

How To Apply Class To Multiple PictureBoxes

Feb 16, 2012

I recently posted a problem with a game that I am making, I have worked on it but have become stuck. I am having trouble with creating an object from my class what I need to do is apply this class to multiple picture boxes so that I can have them moving on screen at the same time. I am unsure on whether or not I have set up the class correctly and am unsure on how to apply it to multiple picture boxes.

This is the class:
Public Class enemycar
Inherits PictureBox
Private speed As Integer
Private xposition As New Random
[Code] .....

View 2 Replies

Multiple Checkboxes With Apply Button?

Aug 31, 2009

I am working on a program that has about 20 checkboxes on it.What I want to be able to do is to check the checkboxes and then hit an apply button then at that point whatever is checked/ or if something is unchecked the code for that item is run and those changes are applied. If the box is checked it disables the service if it is unchecked it enables the service.

the code I have so far is this for each service I want turned off i have placed under a button name Apply.Each service is a different registry entry and service name, some are just registry key changes.the code seemed to work at first but that is when I only had one checkbox under the button.

I know I have done something wrong with the program logic here Im just not sure how to fix it as I've only been using VB.net for 2 weeks now. I can't find any reference on the internet to having multiple checkboxes with an apply type button.

[Code]...

View 26 Replies

VS 2005 : Multiple Checkboxes With Apply Button?

Aug 10, 2009

What I have is approximately 20 checkboxes each one executes the following code below... They do start and stop the service. I also have another 10 checkboxes that make various changes to the registry however there are several issues I am having.....

1. I can set the registry value but I need to get a registry value to see if it is set to 1 or 0 or another number, if that registry value returns as the 0 then the checkbox would be unchecked if the registry if it is set to 1 then the box would be checked (this is an example) however it would be testing for a number condition not a string.

2. The changes happen immediately however if you check a box to stop a service then immediately uncheck it the registry key is changed but the service is not started. What I want to do to resolve this is put an apply button in that would allow multiple variations of checkboxes to be selected, it would show the current state of them and then once changes are made the apply button can be hit it will apply the changes only then and not before then. I also need to have a way where if something is changed and applied the program verifies the service fully started or stopped.

3. I also want to setup several other buttons that will run only predetermined checkboxes

4. I want to be able to also save the checkbox configuration as like a setting that can be loaded in a button called custom.

View 22 Replies

Forms :: Multiple Checkboxes With An Apply Type Button?

Aug 31, 2009

I am working on a program that has about 20 checkboxes on it. What I want to be able to do is to check the checkboxes and then hit an apply button then at that point whatever is checked/ or if something is unchecked the code for that item is run and those changes are applied. If the box is checked it disables the service if it is unchecked it enables the service.

the code I have so far is this for each service I want turned off i have placed under a button name ApplyEach service is a different registry entry and service name, some are just registry key changes.the code seemed to work at first but that is when I only had one checkbox under the button.

I know I have done something wrong with the program logic here Im just not sure how to fix it as I've only been using VB.net for 2 weeks now... I can't find any reference on the internet to having multiple checkboxes with an apply type button. Just like in a normal windows application where the apply button is used to apply the changes on the form.

[Code]...

View 2 Replies

Make Specific Textbox Code Apply To Multiple Textboxes?

Mar 28, 2012

I am programming in VB 2010 and have a question. I have some code that currently only applies to one text box. As you will see, I have sub setup to handle multiple textbox events. My question being, Is there a way to take this code and apply it to all textboxes that are being handled?

VBCode:

Private Sub TextBoxes_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles fnameTxBx.TextChanged, _
lnameTxBx.TextChanged, streetTxBx.TextChanged, cityTxBx.TextChanged
Dim theText As String = fnameTxBx.Text

[code]....

View 6 Replies

Select Multiple Objects Like Checking Multiple Checkboxes?

Nov 24, 2010

Is there a tool in the toolbox that i can use that replaces checkboxes. i have limited amount of space and checkboxes just keep taking up room. I need the user to select multiple objects like checking multiple checkboxes.

View 5 Replies

Entity Framework Query Returns Same Row Multiple Times

Aug 31, 2011

This is my first time using the Entity Framework and I'm getting some confusing results. I know a particular table contains 3 distinct rows when I run this SQL query:
SELECT * FROM mytable WHERE service_month = 201012

When I run this query against the framework however, I get 3 rows, but they are all copies of the first row (VB syntax).
Dim temp = _context.mytable.Where(Function(x) x.service_month = 201012)
Did I set up something incorrectly? This is how I'd do it with LINQ to SQL.

View 1 Replies

Asp.net - Utilize Multiple Databases In An Entity Framework Solution Simultaneously?

May 31, 2011

I have two unrelated databases and I need to pass data back and forth between them. Right now I have created two separate entity models - one for each database - but this is causing issues in my code b/c I have to do a Using nameofcontext / End Using and when I try to then use some of the results from the first section of the code in a second Using nameofcontext / End Using it doesn't like it - b/c I've closed the connection to the first database!

View 1 Replies

Asp.net - Linq Group By An Entity And Then Order By The Grouped (nullable) Entity

Jul 27, 2011

I am trying to build a survey engine from an existing database design which is like this.

[Code]...

The line Order By Key.RecordOrder throws a null reference exception and I can understand why. Can someone advise on how to resolve this by just modifying this one query? I am fairly new to LINQ and the necessity to write this project

[Code]...

View 1 Replies

Gradually Transition To NHibernate Persistence Logic From Existing ADO.NET Persistence Logic?

Sep 3, 2010

The application uses ADO.NET to invoke sprocs for nearly every database operation. Some of these sprocs also contain a fair amount of domain logic. The data access logic for each domain entity resides in the domain class itself. ie, there is no decoupling between domain logic and data access logic. I'm looking to accomplish the following:

[Code]...

View 2 Replies

.net - ADO.net Entity Framework - Update Only Certain Properties On A Detached Entity

Jul 22, 2009

I want to update an entity without loading the entity from the database first. I've accomplished this but only by knowing all of the entities properties and then using the "attachto" method. My issues is i don't want my app to need to remember all of the properties. Example:

[Code]....

View 3 Replies

.NET Sample Entity Framework 4.2 Code First Entity Splitting?

Dec 14, 2011

Entity Splitting: one class, two or more tables.Here is how it is done in C#, but I need to get it working in vb.net.One more thing: the class name and table columns do not match, so I have to be able to map that out, too.I have to get this to work this way because the place I'm working at right now is a vb.net only shop and the database schema is fubar, but they have so much (millions) of lines of code done directly against the database in both asp classic, vb.net, AND asp.net webforms that changing the schema right now is not realistically possible.

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<Post>()
.Map(m =>

[code]....

View 1 Replies

Asp.net - Using ExecuteQuery() With Entity Framework, Entity Class

Jan 16, 2011

I am trying to jump from ASP Classic to asp.net. I have followed tutorials to get Entity Framework and LINQ to connect to my test database, but I am having difficulties figuring out ExecuteQuery(). I believe the problem is that I need an "entity class" for my database, but I can't figure out how to do it. Here is my simple code:

Dim db as New TestModel.TestEntity
Dim results AS IEnumerable(OF ???) = db.ExecuteQuery(Of ???)("Select * from Table1")

From the microsoft example site, they use an entity class called Customers, but I don't understand what that means.

View 1 Replies

C# - Inherited Entity Item Not Recognized As Entity?

Feb 11, 2011

I am trying to create a generic typed class, but am running into a problem. Here is my basic class definition:

public class QueueObject<T> where T : System.ServiceModel.DomainServices.Client.Entity
{
public string LoadingMessage { get; set; }
public System.ServiceModel.DomainServices.Client.EntityQuery<T> Query { get; set; }
}

I am trying to add instances of this class to a queue

private Queue<QueueObject<Entity>> _queue;
this._queue.Enqueue(new QueueObject<MyEntity> {Query = MyContext.GetMyEntitiesQuery(), LoadingMessage = "Loading some stuff"});

This doesn't work. I get an error saying that QueueObject cannont be converted to QueueObject. I don't understand because MyEntity inherits from Entity.

Public Class QueueObject(Of T As System.ServiceModel.DomainServices.Client.Entity)
Public Property LoadingMessage As String
Public Property Query As System.ServiceModel.DomainServices.Client.EntityQuery(Of T)
End Class

[code]....

View 2 Replies

Get Information From Multiple Objects?

Nov 3, 2009

I want to know how to get information/text form other objects to a textbox.

View 10 Replies

Multiple Objects In One Handle?

Sep 18, 2009

I have a handle event that takes care of about 50 buttons. Is there a way to determine which button is being clicked when the event is handled? I have tried using the FromHandle, but I can't seem to get it to work.

View 4 Replies

Using Wildcards Or Specifying Multiple Objects?

Nov 15, 2011

i have a bunch of radio buttons which can have different text displayed depending on whats retrieved from the database.however i want to add code that hides any radio button that would have a 'zero' retrieved from the database.so far this is the code i was coming up with, without getting into the nitty gritty of the actual database queries

If RadioButton1.Text = Me.HWExamsDataSet.DSExamTextA.Rows.Item.tostring = 0 Then
RadioButton1.Visible = False
End Ifabase entries or queries.

it looks like it may work...but is there a way to automate it so that i can put in a reference to ANY radiobutton like radiobutton(*).text? or a bunch of buttons if need be.i know theres a way to specify additional items to a given command...just can't remember if its curly brakets etc.

View 2 Replies

.net - Get INotifyPropertyChanged On Multiple Inherited Objects?

Sep 2, 2011

I have a class, Vehicle. I created two child classes, Car and Plane. I want to monitor the speed, which is a Vehicle Property, and bind it to a control (label, or image, for example) in WPF. When i create a static Class which only purpose is watching the Speed Property, it works, as far as the INotifyPropertyChanged is declared with the Speed Property name.

But the problem is, I have to create dynamicly multiple Cars and Planes by looking in an XML file and deserializing my objects, and creating multiple Car or Plane UserControl (Let's not discuss this way of working, please). So I have to get the Speed property inside the Vehicle Class (which is normal), and I have to get a INotifyPropertyChanged on each Speed of each Vehicle Created. So, my Cars and Planes are loaded, and I have to get all speeds, but I can't create a static Speed property by Vehicle. By the way, by creating a non-static Speed property (as int, for example) in Vehicle Class with INotifyPropertyChanged raised in the setter, it does not work. The event seems to be raised, but my converter is not fired, and my controls does not update.

In my Vehicle Class

Private SpeedValue As Integer
<XmlIgnore()>
Public Property Speed() As Short
Get

[Code]....

The PlaneView Class is almost the same for this part.

I confirm that the converter is fired just once, the first time, when the tabs are created, because I put a breakpoint on the Convert function definition. After that, the converter is never fired again. So the picture img_fonctionnement is displayed, but it is never updated. But the Speed property is updated, I swear. And the INotifyPropertyChanged (in Speed's setter) is raised, as far as i know with the help of the debugger.

And the "an item with the same key has already been added" (which appears in a messageBox, and not as an exception) seems to appear only when I am to long with the debugger. In normal execution mode, it never shows.

View 2 Replies

How To Call Multiple Objects With Same Properties

Apr 15, 2011

How can I call multiple objects? Example..
nameTextbox.Enabled
addressTextbox.Enabled
ContactTextbox.Enabled
How can I call this objects with same properties...

So rather than typing them all with =True or False...
I just have to type a variable = True or false...
And where will I type the code.

View 9 Replies

Listbox To Picturebox - Multiple Objects ?

Feb 19, 2010

So I want to click on different things in a listbox and somethings have a picture and some dont. I want the things without a picture to all show the same thing. I've tried this:

Code:

If ListBox1.SelectedItem = object1 Then
PictureBox1.ImageLocation = object1picture
Else

[CODE]...

This only works for object2 and I know why, but I dont know the correct way to make it work for multiple objects.

View 8 Replies

Loop To Close Multiple Objects?

Oct 5, 2010

I'm using VB.net from the Visual Studio 2008. I have a large number of PictureBoxs in a form. They have been created sequentially, Pic1, Pic2, Pic3, ... Depending on how I access this form, I want to turn off a number of them. I'm working with the code below.I can put the name of the object into a variable, Pic, but am still unable to hide the object names in that variable, Pic.Hide().

Dim StartNumber As UShort = 1
Dim StopNumber As UShort = 33
Dim Number As Object = 1

[code].....

View 1 Replies

Multiple Classes For Serialize Objects?

May 9, 2009

I have one class with <Serialize> attribute called Tree. And Tree class has an arraylist of TreeNode classes. Is it possible to use Soap to convert the Tree class and arraylist of TreeNode classes to one xml file or binary file? If it is possible, do i need to use <Serialize> attribute on TreeNode classes too? If not, what should i do then?

View 3 Replies

Opposite Of A With Statement (Multiple Objects)?

Aug 17, 2011

I'm wanting to to make a color scheme selection feature for my program, which involves changing the foreground and background colors of many components at once. I have the components divided into groups in which all elements should have the same background and foreground.

vb
With BtnLoad And BtnSave And TbxListname And CmbProgDifficulty And TbxRptStandard And TbxQNA And BtnAddProbQ .ForeColor = Color.White .BackColor = Color.IndianRed End With

The problem is that this get's an error message saying that you cannot use "And" (or & or +) in the statement.If I just use one object at a time,

vb
With BtnLoad .ForeColor = Color.White .BackColor = Color.IndianRed End With

it works fine. I have so many objects though, I don't really want to copy and paste this with statement 50 times. is there a way to make a with statement take multiple objects?

View 3 Replies

Serializing Multiple Objects Internally

Nov 11, 2009

I am in the process of writing a base class for gadgets that will be displayed on a form.I want the gadget to be fully self contained and reusable.At this point it does everything that I need it to do EXCEPT, i'm having trouble figuring out a creative way to serialize my objects using only one object.I have a feeling the answer lies somewhere within the context of using shared functions but I'm having trouble wrapping my mind around it.

View 1 Replies

VS 2008 Way To Specify Bounds For Multiple Objects?

May 22, 2009

In my game, which is just for practice, I have a 2 rectangles one set as the inner bounderies, one set as a sprite, but I want to create walls for my boundaries. So how could I set a string of bounds with this

Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
If Sprite.Bounds.Top <> Wall.Bounds.Top Then

[code].....

View 4 Replies

Way To Get Multiple Business Objects Into A DB (in One Go) Without RBAR In .Net?

May 13, 2011

I have a collection of populated custom business objects in my app which I'm going to insert into a SQL 2005 DB using a stored procedure. The collection size isn't massive, maybe 20-30 objects.Is there an elegant way to insert all of these objects into the DB in one go without doing something like the following?:

Open DB conn
For each item in collection ...
Set parameter values of SP from item.properties for SQLCmd

[code]....

View 4 Replies

How To Store Multiple Objects (of Different Class Types)

Mar 22, 2012

My brain is fried at the moment, so here's the scenario.I have a form that adds a member to my VB.NET application.When I press submit I add their details: name and number as well as what products they want (internet and phone). Internet and Phone are their own class as is member.

I want to add that they HAVE whichever they have chosen and with the member store it.

[Code]...

As what happens is once the member is created (stored) I will go to input how much they have used, and then store that. But to do so I will need access to the internet and phone classes, which are associated with said member.

View 2 Replies

Multiple Webbrowser Objects But Refresh Only Active One?

Feb 27, 2010

My program has multiple webbrowser objects, each one in a different tab. How would i go about setting up a button to refresh only the webbrowser on the active tab?

View 1 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved