Nhibernate - What Would Be The Equivalent .NET Code For This C# FluentNHibernate Component Mapping
Feb 4, 2010
I'm a C# programmer constrained to write VB.NET code.While exploring NHibernate further for my current client, I encountered FluentNHibernate, which I find real attractive.But now, I wonder how to "translate" this C# code for component mapping into VB.NET code:
Component(x => x.Address, m =>
{
m.Map(x => x.Number);
m.Map(x => x.Street);
[code]....
what I miss is how to continue with the brackets in VB.NET, since there's no Begin End keywords or so.
EDIT 1: Following Mr. JaredPar instructions, I figured that his solution might work. If we take the time to read his answer, we may notice that we both don't know what the MType is within his solution. I might have found out that the MType is:
FluentNHibernate.Mapping.ComponentPart(Of TComponent)
Thus, TComponent is, from my understanding, an anonymous type that I shall parameter to use. From this point of view, since I wish to map the properties of my Address object, replacing TComponent in my help method signature seems not to work.
Private Sub MapAdresseHelper(Of Adresse)(ByVal a As FluentNHibernate.Mapping.ComponentPart(Of Adresse))
a.Map(Function(m) m.Number)
a.Map(Function(m) m.Street).Length(50)
[code]...
The error I get is that my Address class doesn't have a property member named Street, for instance. It sees my Address type, it recognizes it, but it seems buggy somehow. I guess VBNET is poorly designed for lambda expressions and is less evolved than C#?
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Feb 4, 2010
I just read this article about the Entity Framework 4 (actually version 2).Entity Framework seems to offer a huge improvement over its first release. Thus, I have never ever used EF in any project, since I think EF is not mature enough in comparison to NHibernate.NHibernate and its current contributions of FluentNHibernate and Linq for NHibernate by Ayende RahienMy feeling is that Microsoft is solely trying to gain terrain it has lost in favor of NHibernate when the 2nd version of NHibernate came out.Nevertheless, my concerns are the followings (not in particular order):Will EF4 tend to be less XML-verbose?Will EF4 be compatible with other underlying datastore than just SQL Server?What are the greatest benefits of going with EF4 instead of FluentNHibernate or NHibernate itself.
NHibernate is a great tool, I guess everyone agrees. Due to its predecessor Hibernate, we may easily find documentions and tutorials and sample applications to get acquainted with it. This is not the case for FluentNHibernate. Particularly as per the project I'm working on right now which demands that I investigate further about NHibernate and its options (FluentNHibernate for instance) in order to document the rules of usage and the best practices of NHibernat and FluentNHibernate technology. Thus, being handcuffed with VB.NET, being a C-Style developer, I can't find some syntax equivalencies in VB.NET for the examples provided, though I made I way so far
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Oct 5, 2010
Question: I get an exception serializing this class to a nHibernate xml file ({"Could not determine type for: System.Drawing.Image, System.Drawing, for columns:NHibernate.Mapping.Column(Settings)"}).
using System;
using System.Collections.Generic;
using System.Text;
[code].....
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Dec 6, 2011
I am using Fluent NHibernate to map an Oracle database. It is a legacy database so I cant really change everything I want.There is a GUID field, but the keys are still composite (I will change this as soon as I can so that the keys are not composite, but I cant do it right now). The GUID is a VARCHAR2 field with this layout: 551608b1-275d-49f6-9561-44d01aacf23f. The GUID is not added by a sequence in Oracle, but inserted from code (C# or VB.net)[code]Is the problem that I dont use a sequence to generate my GUID? How can I overcome this?
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Oct 13, 2011
I have a read-only mssql-view, and I want to map it to nhibernate (using hbm.xml files). The view is a select that joins two tables. For give an abstract-insight, the select is something like this:
SELECT A.Id As A_ID, B.Id As B_ID,
A.AttributeA, B.AttributeB,
FROM A INNER JOIN B ON
A.Id = B.RootID
It's a one-to-many relationship between A and B (B entries are dependant/leafs of A entries).
I'm using nhibernate's hbm.xml files, and I can't make it to work. I'd gladly appreciate if someone can enlight me of the kind of XML that I have to use, I guess that as my view has no ID, I have to create a composite-nhibernate id (wich will be the ids os A and B together) but I couldn't make it to work. Also the view is READ ONLY so I think that should make the solution easier.
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Nov 4, 2011
The tables described herein both utilize composite keys. I have a parent table that stores eligibility information per "case". The child table stores eligibility information regarding each individual associated with the case. The child records are differentiated by pin number to make them unique in the child table only.
I am using NHibernate v3.1 with Fluent NHibernate v1.2, both acquired via NuGet packages. The entities are mapped in using the Fluent NHibernate auto-mapper functionality. Any custom mapping is done in the mapping override method for each entity.
Another thing to know is that these tables do not have a "primary key" defined in DB2. They only have "unique keys", which are what you see in the composite key definition below (see code).
T0026_AG_ELIG is the name of the parent table and the corresponding POCO class.
T0265_AG_IN_ELIG is the name of the child table and the corresponding POCO class.
Problem:
The problem is that when I execute the query, all the data is queried, the parent record is successfully mapped to the class, but the returned child rows do not map into the collection on the parent class. NHibernate does generate the queries for the parent and child data. When I execute my own query against the database, the correct data for the conditions does come back. For some reason, the child records are just not being bound to the property on the parent (T0026) class.
Question:
What do I need to do to get the multiple rows coming back from T0265_AG_IN_ELIG to map to their corresponding class and load properly into the specified collection property on the parent class (T0026_AG_ELIG)?
Collection Property of Parent (T0026_AG_ELIG):
Public Overridable Property IndividualEligibilityRecords As IList(Of T0265_AG_IN_ELIG)
Mapping Override for Parent (T0026_AG_ELIG):
mapping.CompositeId() _
[Code].....
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Oct 13, 2009
I use vb.net 2005.I want to take one image and place it on top of another image, I want to blend the images using various techniques such as OR or XOR od AND functions.I understand BitBlt does this.1) Is this the technique i should use in .net? Or is there some complicated parameters burried deep in the graphics.drawimage method?2) How do i declare the BitBlt function and what are the values of the ROP parameters?
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Mar 10, 2010
Basically, I wish to fetch a filtered set of objects from the database (Oracle 9.2) based on the id property of the object PsalertsEvent. The code being executed is:
Public Overloads Function GetAll(ByVal laterThan As Long, ByVal filteredPsalertsEvents As IList) As IList Implements IPsalertsEventRepo.GetAll
'Get all psalerts events with an ID greater then the specified laterThan parameter
filteredPsalertsEvents = MyBase.NHibernateSession.CreateQuery("from PsalertsEvent p where p.id > " & laterThan).List
[Code]...
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Jan 12, 2011
I am starting on the NHibernate world and i am experimenting with the NHibernate CookBook
recipes, i am trying to set a base entity class for my entities and this is the C# code for this. I would like to know whats the VB.NET version so i can implement it in my sample project
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Oct 26, 2010
I would like to ask if you can use VB.NET for NHibernate and Fluent Nhibernate?I have searched the web, but I can't seem to get a detailed or explicit statement that tells that one can use VB.NET for NHibernate and with Fluent.
Many of the samples in the NHibernate site are made in C#. That's why I was wondering if I can't use VB.NET when using NHibernate.
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Mar 17, 2012
Question regarding fluent nHibernate table mappings:Apparently I was under the mistaken impression, that with an ORM tool, such as nHibernate, one could gain database independence - at least in table creation.Now, I have an automated toowhich creates fluent nHibernate mappings for me.It also works fine (though only if ALL tables have a primary key...)
Here a good representative example for such a mapping as it is created by the program
public class ELMAH_ErrorMap : ClassMap<ELMAH_Error>
{
[code].....
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Jul 28, 2009
private bool txtRegExStringIsValid(string textToValidate)
{
Regex TheRegExpression;
string TheTextToValidate;
[code]....
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Nov 24, 2010
The code in C# is as follows:private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
[Code]...
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Jun 6, 2011
Schema is a string, lstSchemas is listbpb and rc is a variant
Schema = VB6.GetItemString(lstSchemas, rc)
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Jan 23, 2010
I find that when I have the string
in cell (1,1)
and in Excel I put in cell(2,1) the formula
= code(mid(A1,1,1))
I get the result 63, which I should.But in visual basic, when I write
v1 = .cells(1,1)
.cells(3,1) = v1
msgbox asc(mid(v1,1,1))
the message returns 65, which is the code for A, not Ā.It is clear that VB is reading the contents of cell(1,1) correctly because it puts the correct text in cell(3,1).The Code function isn't supported in Visual Basic. I have been unsuccessful trying to use Application.code It won't compile. How can I get VB to give the correct code of the character Ā?
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Feb 22, 2011
What is the equivalent vb.net code of the following?
using System;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
namespace ContosoUniversity.DAL
[code]....
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May 4, 2010
Following is the OnCallBack (async communications handler method) in C# and translated to VB.NET.The c# one works fine, but the VB.NET one gives a compilation error: "Property access must assign to the property or use its value." The error happens on the following line:
state.CallBack(Me,
New
ClientEventArgs()
With
[Code]...
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Jun 13, 2011
got this code from this site: [URL] public static void Send(String from, String to, String subject, String messageText).
SmtpMail.Send("mcb@mindcracker.com", "webmaster@mindcracker.com", "Subject", "Message body").
what's the equivalent code of this in vb express 2010.
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Jul 27, 2010
I build a component class it extends a combo box and generates some random numbers. But when I drag and drop my component from the toolbox to a form it auto generates Me.Randtest1.Items.AddRange(...) in the Designer which uses static numbers. The idea was to have different numbers each time and not the same.[code]
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May 26, 2010
I'm working on a tutorial to build a media player in Silverlight and am trying to wire up an EventHandler to the timer.Tick event of a DispatchTimer object so that the time of the video is synced with a Slider object.
The sample code is in C# and I can't for the life of me figure out the proper syntax in VB.NET with RaiseEvent and/or Handles to wire up the event. Below is the relevant C# code. I'll include comments on where I'm getting stuck.
[Code]...
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Jan 23, 2010
In cell A1 of Sheet2 I have the following text [code]how to I get VB to recognize that the 4<sup>th</sup> character of the string has character code 63?
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Apr 26, 2012
In the GUI world, OpenFileDialog provides one stop shopping for the user to select the drive, the folder and then the file.Has anyone seen a set of code to implement this functionality (although obviously one value at at time /select drive/selectfolder/select file) in a console application?
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Jan 28, 2010
So I have a custom control that when added to a form will create two child controls inside it. The custom control's designer handles the creation of these. The problem I am having is that when the designer generates code for these controls only the parent control is declared "WithEvents". So my que
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Jan 23, 2011
In VB.NET:
DataTable.GetChanges(Not DataRowState.Deleted)
What is the equivalent in C#?
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Aug 26, 2010
How do I write the equivalent c# code below in vb.net? This 'About' form is launched by a ToolItemMenu. It is just informational and contains only an OK button
//Form contains company logo, copyright info and OK button.
public About formAbout;
using (formAbout = new About())
[code].....
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Dec 16, 2009
if (node.Attributes != null) //checking for attributes of a xml file node.
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Dec 20, 2010
anyone knows the equivalent code for App.TaskVisible in VB.net? App.TaskVisible is from VB6 which hides the application in the applications list in task manager and not in the processes list tab.
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Feb 3, 2011
I am converting an old Vb6 solution to .net 2.0 in vs2010. I've been working in C# for about 3 years now and .net for 5. I don't recall having this problem in C#, but if I want initialize a readonly collection of DerivedControlFoo Is there a clean way to do it besides creating a sub to do it all off somewhere else? I'd love to be able to do it at the class level at the declaration for readability and simplicity.
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Mar 1, 2010
Create a DLL component for database operation and use created component in another project. Required methods, events and properties
a. Connect
b. Add
c. Delete
d. Save
e. Record navigation (first, next, previous, last)
f. Properties for all database fields
g. Events for validation of database fields.
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Jan 8, 2010
I've created a component whose name I'd like to be able to change while editing in the component tray. I've added a Designer action for a name property, but now I'm stuck.
Looking at the property grid, I can see that the name property is parenthesised, indicating that it's not a regular property.
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