Displaying Text Fields Linked To By Foreign Keys?

May 8, 2009

I have a three-tier Windows Forms DB application in VB.NET. I'm using VS 2005. I'd like to display records in a table in a DataGridView. I can already display the records as is by binding the DataSource to the business class that talks to the DB class:
Dim assetList as List(Of Asset)
assetList = DB_Asset.GetAssetListOrderByID_Asset
AssetDataGridView.DataSource = assetList

"Asset" is my business class, and "DB_Asset" is my DB class that queries the DB to return assetList. Now, Asset has members something like this:
Private m_ID_Asset As Integer
Private m_CategoryID As Integer
Private m_CustodianID As Integer
Private m_ManufacturerID As Integer
Private m_SignedOutToID As Integer
Private m_DefaultLocationID As Integer
Private m_CurrentLocationID As Integer
Private m_DateAcquired As Date
Private m_DateEntered As Date
Private m_EnteredByID As Integer

m _ ID _ Asset contains the primary key for the Asset table in the DB, and everything else of the form m_XXXXXXXXXID contains a foreign key to another table in the DB. So basically what I get now is rows with a whole lot of numbers. It's exactly what's in the Assets table:

ID_Asset CategoryID CustodianID ManufacturerID SignedOutToID
1 17 23 14 5

What I'd like to know is if there's an easy way to display the text fields that I've linked to with all of those foreign keys:

ID_Asset CategoryName CustodianName Manufacturer SignedOutTo
1 Soda - Diet John Coca-Cola Fred

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Set Two Foreign Keys, That Refer To The Same Table/field

Feb 22, 2011

I have an Access database where I want to store the contacts in a company: In this database I have a table named "users" where I keep the users which will have access to the database. In the main table, named "contacts", two of my fields "insert_user" and "contact_user" refer to the user who entered the contact information and the user who actually made the contact. The way I am thinking it, I will have to set both of the fields as foreign keys to the same table/field, namely "users"/"username".

So:
I set two foreign key constrains in two different fields ("insert_user", "contact_user"), which refer to the same table/field ("users"/"username") in an
Access database, using VB.Net OleDB (See the SQL Statement below)

ALTER TABLE contacts ADD CONSTRAINT insert_user_foreignkey FOREIGN KEY (insert_user) REFERENCES users (username)
ALTER TABLE contacts ADD CONSTRAINT contact_user_foreignkey FOREIGN KEY (contact_user) REFERENCES users (username)

I open the database with MS-Access. I see that all the tables are fine (as they should be).

However when I click on relationships at Access I get all my tables plus a table named users_1 connected to "contacts"/"contact_user" (the table users is only connected to "contacts"/"insert_user")

It is very strange that in the Table View of Access I don't see this table, but only in the Relationships View.

Questions

Is my thinking right (to set 2 foreign keys, that refer to the same table/field)? What is this table "users_1"? Will my database work or am I doing something wrong?

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C# - Joint Query In Linq To SQL To Select All Records Even There Are Some Null In The Columns Of Foreign Keys?

Feb 2, 2011

I'd like to take all suggestion either in C# or VB.NET.I have a DB diagram like the image below. I also include the database script here [URL]In the Students table, CountryId and RoomId column are allowed null. Because some records do not have info about room and country yet.Also, some students do not have essays.I'm doing a joint query with all tables. I want to select all students to project the result like this:Wanted query result.

Here's my current query that gives the result like the image below:

Dim db As New DBDataContext
Dim query = From st In db.Students _
Join c In db.Countries On c.Id Equals st.Id _
Join r In db.Rooms On r.Id Equals st.RoomId _

[code].....

current query result I got only one result back because I have (2) William NoMan record in every table. But I don't get anything about others, like (3) Sync Master who has everything but RoomId.What do I need to modify the query above so it will give me all students like in the wanted query image above?

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Private Fields Flagged As WithEvents Are Taken By Code First To Build An Automatic Foreign?

Jan 22, 2012

a simple question. Given the following code:

Public Class MyClass
Private WithEvents pPerClass As PersistableClass
Public Overridable Property PerClass() As PersistableClass
Get
Return pPerClass

[Code]...

the first being a duplication of the second key, strangely obtained from a private field.

If you remove the WithEvents keyword, the pPerClass_PersistableClassID key is not created.

I am new to EF but it seems to me a strange behaviour.

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Avoid Error When Displaying Empty MS Access Fields In VB?

Feb 15, 2012

I have a database with lots of fields, some of which are still empty and are to be filled in at a later stage. Is there any way of writing an IF statement (or any other method) that will allow these empty records to be 'shown' in my textboxes in Visual Studio, without receiving the error:

Conversion from type 'DBNull' to type 'String' is not valid.

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Displaying Fields Related To Compact Disk Catalog?

Mar 26, 2009

I'd like to jump in and write a simple application to display fields related to my compact disk library (Disk#, Composer, Work, etc.) in a scrollable window. The current catalog in in a DOS/xBase format, but I can export it to Excel or Access. I am using VB within Visual Studio 2008. Any most effective VB command(s) to use? Is the indicated command used within a looping structure?

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C# - MS Word Office Automation - Filling Text Form Fields And Check Box Form Fields And Mail Merge

Sep 3, 2009

experience on how to create an engine using C# (VB.NET is okay too) that is generic enough to handle most cases of MS Word text fields I need to fill with data I'm getting from a database? In short, I'm about to embark on this little Office automation excursion and I'm hoping a little bit of feedback here.

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Use The Free Text To Add To Drop Down Linked To The Same Field?

May 13, 2009

I want to have a text box which allows user to input free text or to pick from list derived from previous entries to this field. I can do it where random number generates to become a field on the combo box for editing but not sure how to use the free text to add to drop down linked to the same field.

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VS 2010 Clickable List Of Custom Colours Linked To Text File?

Aug 21, 2011

I would like to create a little list in my Windows Form showing a list of custom colors with their 'friendly names'. Technically it can be anything (ListBox, ListView, Panel etc... whatever).

I simply want it to look something like this:

I would like to store data for this list in a simple TXT file in such form:

Quote:

Blue,Blue
Red,Red
#F6A118,My favourite color
#004080,Another color

And of course I would like each element on such list to be clickable, so if I'd click 'My favourite color' it should return the color's HEX value (#F6A118).

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Game Programming :: Detecting Whether One Of The Arrow Keys Is Pressed, All The Other Keys Seem To Be Detected Apart From The Arrow Keys?

Oct 21, 2008

I have a problem detecting whether one of the arrow keys is pressed, all the other keys seem to be detected apart from the arrow keys??? I have set key preview to True........ It detects the arrrow keys BUT ONLY if I have NO other controls on the form??? example..

Me.Text = e.keycode

It works, but then if I add a button for example, it stops.

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VbCrLf Keeps Replacing Text In A Text Box When It's Meant To Be Displaying The Next Block Of Text Below It?

Mar 14, 2011

I'm building a program in which it asks for your name and age and determines a ticket price based upon these details. I want it to show the person's name, then their age, (jump down a line) then their ticket price, and then it jumps down a line to show the next person's name, age and ticket price. Issue is, when it's meant to jump down to show the next person, it just completely deletes the last person's details.I'm using this line of code:

TxtFareShow.Text = (Name & Age & vbCrLf & Price) & vbCrLf

How do I fix this?

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Get Some Text Fields To Input Text And One Image Path Then Want To Print That In A Format?

Mar 23, 2010

What I want, is Some text fields to input text, and one image path, then I want to print that, in a format like..

Centered Text
Centered Text
-------------------------------------
[=====IMG=====] Text text text text

[code]....

But from everything I've read though, I'm completely lost.

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Reading A Specific Line From A Text File And Displaying It In Individual Text Boxes?

Feb 16, 2010

I've been writing a weight program for flooded pressure vessels and I'm having trouble retrieving the data from the text files I've been saving. I know how to write the data to the text file, but retrieving it with OpenFileDialog is not so easy for me.The user has individual text boxes that they input strings or numbers into and when they save the file, each text box input is written to one line in the text file. For example, the first text box is for the username, therefore the first line of text that is saved is the person's name, the second text box is the customer, thus the second line in the text file is the customer name, and so on.

(Actually, the first line of text in the saved file designates whether English units were used or Metric units because when the user retrieves the saved file, English units will open one form and Metric units will open a separate form, so some If...Then statement will need to occur).I need to be able to read the first line, have either my "EnglishForm"form open or my "MetricForm" form open, and then have each subsequent line of text be displayed in their corresponding text boxes. I know I need to use ReadLine or LineInput, but I don't have a clue what to do.Assuming the syntax I've displayed below would just magically work (if only life were that easy), it would look something like this

If FirstLineOfTextInFile = "English" Then
EnglishForm.Show()
ElseIf FirstLineOfTextInFile = "Metric" Then[code]....

And so on...I read a lot of articles from the MSDN library and exhausted each link that I've looked through from Google and Bing, but most only retrieve data from the file to a single text box through some loop or streamreader and don't take into account multiple forms.

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Display Data Linked By A Data Relation In Different Text Boxes?

Dec 7, 2010

I have a data set with a parent child relationship between a patient table and an insurance table. There can be up to 4 insurances for each patient. I want to display them in 4 separate panels of a vb.net form. So if a patient had 2 insurances, then txtName1.text on panel 1 would have the company name of the first insurance, txtName2.text on panel 2 would hold the company name of the second insurance, and so on.

How do I display only the insurances related to the current patient? I've tried moving through the rows of the related table, but that gives me all the rows, not the ones I need. Everything I see on the internet suggest using a datagrid, but that's not an option in this case.

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Hot Keys VB 10 Express - Giving Auto Typer Hot Keys?

Jun 25, 2011

just wondering how i could give my auto typer hot keys, for example they press f1 to start the typer f2 to stop it.

[Code]...

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VS 2010 Shortcut Keys (KeyUp) E.Keys Combinations?

Mar 25, 2011

I'm trying to create a shortcut which expands or collapses my treeview using the ctrl+alt+up-arrow or ctrl+alt+down-arrow:

If Keys.ControlKey And e.KeyCode = Keys.Alt And e.KeyCode = Keys.Down Then
mytreeview.ExpandAll()
End If

[code].....

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Take A Comma Delimited Text File And Then Select All Unique Records Based On One Of The Fields In The Text File?

May 7, 2010

i want to take a comma delimited text file and then select all unique records based on one of the fields in the text file. should i read the text file into a data table or just use a data reader?

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How To Link Text Fields

Feb 6, 2011

I'm working on a feedback form for my project that has labels for questions, and text fields for answer input.For my feedback form, I need a code that "binds" or links all the label(s) text and textbox(s) text. Basically, almost like a survey. I need all this text to be able to be sent to an email address.

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Sep 15, 2008

My application outputs log text every so often and I need the user to be able to see the latest text at all times. I've tried a label, a text box and a rich text box, but I can't figure out a way to show the bottom-most text at all times.

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Clearing Multiple Text Fields

Aug 2, 2010

I tried searching for a solution, but couldn't find anything, so if I am re-asking a common question, don't beat me too badly. For a class, I have to create a form that allows someone to enter in the names of six students, as well as five test scores each. It also averages the scores, and displays them in a label.

What I am wondering is if there is a way to clear the text from all 36 text fields, as well as the 6 labels without having to do everything individually?
I could certainly go through, and write out txtField1.text = String.Empty 36 times, but it seems there would be a more elegant solution. Also, if there is a way to do so, would the same would apply for putting the data entered into an array, or saving it to a file?

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DB/Reporting :: Getting Query Fields Into Text Box?

Jan 14, 2009

I am writing a little program that does the following:Allows the user to enter a id number.Then when the find button is clicked, we connect to the database and run a select statement for the id.I am trying to figure out how to get the first name, last name and birthdate into textboxes on my form.

I would like to have a way to display a messagebox if the resultset = 0 so as to tell the user no records found.Then if the information is correct I am going to have a button to update the information which is going to call a stored procedure I have in place to update the record.how to make the connection which I think I have working and then loading the individual fields into the appropriate textboxes.

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Insert Data On All Text Fields?

Feb 8, 2010

I bound user to fill textbox through this code

If (TextBox1.Text = Nothing) Then
MessageBox.Show("Please Insert Your Name")
End If

but how can i bound user to put characters only in name field,if user insert numbers then its shows alert to user.how can i do this?

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Text Fields Truncated To First Character Only?

Nov 20, 2010

I'm working on a project using SQL Server Express 2008 R2 and Visual Basic 2008.My table has 8 text fields, each using the data type VarChar(num) with the number(num) ranging from 5 to 50. There are also number fields and a boolean field in the table.When I try to insert or update the table in Visual Basic the program runs through to completion, but the VarChar fields only contain the first character. The other fields come out fine. If I create the record in SSMS the fields are not truncated.

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Update Text Fields In PDF Document

Mar 11, 2010

Does any one have any examples whereby the code can access a PDF Document (adobe) and update the text fields inside that PDF document all from VB?

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VB2005 Changing Text Fields?

Aug 14, 2011

I have a series of text boxes in my form that can accept 6 digits. Upon entering the 6th digit I want the focus to move to the next text box. Is there a way to initiate a Tab command (just putting chr(9) didn't work...so that may be wrong) once the counter hits 6? I currently have the following code, using the .focus command but I am hoping to not have to create 25 subs to set focus to the next. My current

Private Sub txtEnter1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles txtEnter1.KeyDown

[Code]...

I can't just add txtEnter2.KeyDown (etc.) to the Handles of the sub declaration because then they would all set the focus to txtEnter2 instead of to the next text box. I'm sure it is something ridiculously easy but it is escaping my grasp.

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Loop Through A List Of The Keys That Are Available In The 'Keys' Enumeration?

Jan 13, 2011

How could I loop through a list of the keys that are available in the 'Keys' enumeration? It seems like it should be something easy to do, but I'm not having any luck finding a collection that I can loop through.

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VS 2008 Parse Text For Fields - Get A String List Of All Values Within [] In A String Of Text?

Oct 18, 2010

What would be the fasted method of get a string list of all values within [] in a string of text? For example: [client_name], are you are doing today? My name is [my_name]. The list of strings would be:

[Code]...

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Refactoring A Module Into A Class: Changing Shared Fields To Instance Fields

Nov 14, 2011

I'm currently refactoring an old Visual Basic DLL (VB.Net), which stores all of its data in one module called Globaldefinitions as public fields. There are about 200 fields, referenced thousands of times all around the code:

Public Module Globaldefinitons
Public a As Short
...
Public zz10 As Double

[Code]...

I need to change the module into a class with non-shared fields. This means, each and every of these thousands of references needs to reference the instance of that class:

globalDefinitionsInstance.a = 5

How do I go about this efficiently?

Regular expressions operating on the source fall flat. Refactoring tools like Re-Sharper or CodeRush don't seem to offer this functionality. Visual Studio 2010 cannot do it automatically either.

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Break Out Individual Fields In A Text Line

Jul 20, 2009

I'm not getting this at all I suppose. I've tried so many variations to split the lines into individual fields and I still cannot get it to do what I want.

I have to get lines from a sequential file which read like:

CODE:

And load them to a listbox like this:

CODE:

With the ID # padleft(10, "0") and the commas eliminated, and only the Last Name, First Name and Middle Initial showing.

This is my mess of a code (it is just one of many variations)

CODE:

I've got the ID field right but the rest just shows up as it is in the file commas and all.

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Building An Email From Text Fields In A Form

Nov 30, 2010

I need to build a rather simple form for collection some information from our membership. It has 4 Text boxes and one Submit button. The contents of the text boxes need to be emailed to a fixed Address and a fixed Subject. Before I got to fancy I tested the form to see if the email portion worked which I did get the email but not all the data. I am trying to stick with VB as I had experience with it years ago.

My problem seems to be in building the string for the body of the message. Trying to use StringBuilder but my syntax is messed up somewhere. The Fields that I have are: Name, Phone, Email Address: and Comments. They are named in the form as txtName, txtPhone, txtEmail and txtComments. [Code]

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