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?
View 3 RepliesI have a typed dataset with 2 tables and a relation between the 2 tables. The relation is a 1 to 1 relation.First, who cane help me how to bind both the fields of the parent and the child table to a textbox.And second, in the dataset designer you cane preview the data. There a see for each record 1 row with all fields of the parent and also the fields of the child table. How cane i have the same result in a datagridview?
View 1 RepliesI don't really know how to deal with the next issue So, I've a webbased application developped with ASP.NET MVC3, which is used to remember when an event is relayed to some people.
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I would need to update a record using inline SQL string, when I use the first SQL string I get the error "data type mismatch in criteria expresion" but when I remove the time fields and run the SQL string the code works
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I have a table being imported into my VB application that has 3 columns. I have written code to import the table, and have written code to display on the first column (country) in a list view.
What I want to do now is have the user select / highlight an item in the list view, and have the third column (currency) related to that selected country appear in a text box when a button is clicked.
Here's the code I've written that successfully imports the data and displays the first column:
Private Sub frmCountry_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim dataCountry As New DataTable()
[Code]...
Should I perhaps use something other than a list view?
I know this is not the right place for this question but still I would like to create in Visual Studio a small site with related links based on what the current page is displaying, from what I understand it's about MVP/MVC
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.
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
I need to print a card catalog using Vb.net like this format:I'll be using values form textboxes to be printed.I've already read this thread [URL] printing such in a more easy way to understand, I need to preview it first before printing.
View 7 RepliesI'm working on a program to catalog MP3s (I know, it's a tired thing that's been done to death), and want a better way to determine if a file has previously been added to my database. I have two datasets that are structurally identical. The first dataset is populated from the database and the second is populated via the application during the scan.
I then compare each record in the second dataset to the first with the following code:
Private Sub CompareDataSets(ByVal dsOriginal, ByVal dsNew)
Dim dv As DataView
Dim sFileName As String
Dim sPath As String
Dim bgFileSize As Long
[CODE]...
This method seems terribly inefficient and I'd much prefer being able to do a join of sorts off the two datasets and delete all records from the application populated dataset where there is a match.
generating a catalog number for a library system?It is one of the requirement of the panel in my thesis, though its not fits correctly but atleaast, there is suggestion given in a generated catalog.
View 3 RepliesI am building a form that will load individual items(from individual files) or a catalog of items(from a list of items). I then click the item I want to use to select it. Everything works correctly, when I click an item it selects the correct stitch. The only problem is, it doesn't display correctly when I load from a catalog. I can open individual items and it works fine. When I load a catalog it doesn't display the images correctly.
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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.
Class Foo
ReadOnly name As String
Public Sub New(name As String, dependentUpon As Foo)
Me.name = name
[code]....
The output of New Bar() is:
Dependent created. Dependent upon nothing.
Independent created. Dependent upon nothing.
It seems fields are initialized in the same order as they appear in the source code, which (a) leads to an unexpected result, and (b) seems a little puzzling, given that one is normally not permitted to read from uninitialized variables in .NET, yet that seems to be working fine above.I would've expected VB.NET to be smart enough to initialize referenced fields first, and only then those that reference it; i.e. I'd have liked to see this output instead:
Independent created. Dependent upon nothing.
Dependent created. Dependent upon Independent.
how to get VB.NET to behave like that instead, without simply having to swap the declaration order of dependent and independent inside class Bar?
I'm trying to create a table in Word using data from a table in Access. There are four fields in the access table that I need. 3 fields are text which I can populate the Word without any issues. However the fourth field is a memo with >255 characters.I'm struggling to come up with the proper code to allow me to populate the Word field with the memo data that has more than 255 characters. The code I have so far is listed below. But when it hits the memo field, it crashes on the line I marked with **. I know it's not text, but I've tried many different field types, but nothing has worked so far.[code]...
View 1 RepliesMy intent is to have the code - on a button.click event - check the Username and Password fields and return an error depending on which is wrong. Or if both are wrong, return a different error message. I've set the username as parts and the password as parts (still learning how to use external authentication). [Code]
View 2 RepliesI have several sqldatasources for my gridview. All of the columns are autogenerated. However they all have some consistent fields and I'd like to make those fields template fields so I can modify the edit template for them such as adding a drop down menu. Is this possible?
View 1 Repliesexperience 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.
View 2 RepliesI have a table which contains a list of products for a company. They input data about how much stock they have and also the level at which they want to be reminded that they need to order new stock.
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I want to list all the true results in a form which the user is then able to navigate through. What would be the best way to go about doing this?
how to execute this SQL Statement
Scenario:
Given Tables T_Data, T_AllDesc, T_System1, T_System2
Given Fields:
T_Data= f_id, f_Desc, f_CreationDate, f_CreationTime, f_System1, f_System2
[Code].....
i was wondering what may be the difference between an "initial catalog" and a "database" in the context of a connection string?also, as a second question, i was wondering do we have to explicitly close adapters(SqlClient.SqlDataAdapter) or set the variable to = Nothing after using it?
View 5 Replieshowever i have always had issues with databases... so i abandoned it and went into web design instead. Php and sql are so easy there is nothing i cant do with them.I created an Sql compact database which i can connect to and navigate using the following code... but that is it. i cant seem to add to db in any way shape or form.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.AddressTableAdapter1.Fill(Me.TestsqlcDataSet1.address)
End Sub
[code]....
Im looking for some advice on the deployment of an application using SQL Compact Edition.My application will only be used by two people on two separate desktops with file sharing enabled.My goal is to deploy the application and have the .sdf file located on one of the desktops in a shared folder. So the other person using the app can connect to that database too.What is the best way to setup the deployment of this so that I can place the DB in lets say c:DBMyDB.sdf
View 5 RepliesHow can I add data to SQL Compact Database from DataGridView?Striving to do my best.
View 2 RepliesI am new to vb 2008 and I can't seem to figure this out.
When I try to add a database to my project I get this error (Please look at .jpg (Firsterror)
I have selected the correct driver SQL Compact 3.5
It will add the database to the project but the FULL PATH is always incorrect and I can't change it. (Please look at my seconderror.jpg) the correct path is C:SQLSample.sdf
I am trying to compact a Access 97 MDB file. I have found and tried the following code
Private Sub CompactDB()
Dim jro As JRO.JetEngine
jro = New JRO.JetEngine()
jro.CompactDatabase("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=<DATAPATH>", _
"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=<DATAPATH>;")
MsgBox("Finished Compacting Database!")
End Sub
This codes works and seems to compact the file and it appears in the destination folder but when i try to open the new file i get an error "Unrecognized database format 'DATAPATH'"Is there something i am doing incorrect? the database file sizes range from 5Mb to 100Mb+
I am using Access database. Now i compact the database by using DAO and sometimes using JRO. But to this both, we have add the COM reference.
View 2 RepliesI am trying to set a default datetime for sql compact but I receive an overflow.
Does anyone know the default format for sql compact? I thought it was yyyymmdd
I need to create a sound if validation fails. Anyone know how to do that? It can be a wave file or any kind of format.
How can i create a sound in .net compact framework 2.0. using vb.net. I saw codes asking to use system.media class. However in compact framework there do not seem to have this class.
I want to use MySQL with my mobile phone. I have installed the "MySQL Connector" and use this
Dim conn As New MySql.Data.MySqlClient.MySqlConnection
Dim myConnectionString as String
[CODE]....
My machine has erros with "MySql.Data.MySqlClient.MySqlException" and "MySql.Data.MySqlClient.MySqlConnection"
How can i solve this problem? With the normale Framework i can use MySQL...