What is the best way to set the default value for 'bit' or boolean data types in SQL express? I am using the data base explorer in VB Express 2008 and the only way I seem to be able to do it is by using ((0)) for false and ((1)) for true.
View 1 RepliesWhat value should I put as a default value for Image Data type field on a record?
View 4 RepliesI'm working on a small project - a database program to track and log the progress of some experiments. I'm using VB 2010 Express, and I'm pretty much just learning as I go. I'm getting ready to learn about the data models available, and am having trouble navigating the info I find.Is it best to develop the data within the SQL CE environment, or does that require the end-user to download additional libraries/programs? Is there a better data model for my needs (not much complex data processing, but a sizable amount of records/tables)?
View 2 RepliesI am getting this error when create new record.
Data type mismatch in criteria expression.
Code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim com As New OleDbCommand
Dim d As Integer = 0
Dim result
[Code] .....
I am linking to an SQL table with 'Money' field. When i try to update this field in VB.NET I get an error message that "Can not convert a character value to money. The char value has incorrect syntax".
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I have a bunch of Excel files full of research data. Everything is strait forward: rows of research categories and columns of research parameters. I want to create a simple search form that allows opening any of the spread sheets that contains the type of data that I specify. For example, I would choose a parameter
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I'm trying to add a new record to my database but i keep getting the message - "conversion from type DBnull to type string is not valid". I think its something to do with the Employee ID when VB attempts to save it to the database my code is below
Imports System.Data.OleDb
Public Class Add
Private Sub DisplayRow()
[Code]....
I am working on a very simple application in Visual Basic 2008 Express.
The program has a Listview where I display the "DisplayName" field, the user clicks on a name and this should fill 3 text boxes. The code is:
strSQL = "SELECT FName, LName, DisplayName FROM tStaff WHERE DisplayName=@DisplayName;"
Dim conn As New OleDbConnection(strConnString)
[Code]....
This produces the error "Parameter @DisplayName" has no defaul value"
The value of the variable "strDisplayName" is correctly captured.
For each column in data table i want to add parameter with same data type as column data type. But looks it's not that simple.
Dim cmd As New SqlCommand
Dim dType As New System.Data.SqlDbType
For Each cl As DataColumn In DataTable1.Columns
[CODE]...
How can I do this?
I need my program to connect to a database within my application i.e.What I have:
m_cnADONetConnection.ConnectionString = "Provider=Microsoft.jet.OLEDB.4.0;Data Source = C:Documents and SettingsmeroneyfMy DocumentsVisual Studio 2008ProjectsAsset Manager 2008inDebugDatabaseAssetManager.mdb"
What I need is: m_cnADONetConnection.ConnectionString = "Provider=Microsoft.jet.OLEDB.4.0;Data Source = DatabaseAssetManager.mdb"
I have used:System.Windows.Forms.Application.StartupPath & "ImagesSystemDefaultImage.bmp"
for loading of images within the default directory. but this returns the app path but also includes "System.Windows.Forms.Application.StartupPath" in the string?
In a combobox dropdown. What toolbox or properties do I use in VB Express 2010 to add a default to my drop down so the user will see the default when the panel is first shown?
View 3 RepliesI am finally ready to move off MSACCESS to SQL. All the advice I've received says to go to SQL Express. I am running VS2008 using VB. I have a lot of experience with MS access. My apps are web based and communicate via web services with the clients. All I need is a good starting point, I want to convert my tables to SQL Express. All documentation I've found has been rather disjointed.
View 1 RepliesI started coding my first "real" stand-alone desktop application in VB 2008 Express. I was led into believing that using SQL Express Compact Edition was the thing to use for my database since it would reside on each PC (laptops) that I installed the program on. I created all my tables and about 6 forms and all was going well until I came to the point where I need to display a grid showing data from multiple tables using what i think is supposed to be a view. Now the problem is that CE doesnt allow views. Here are my questions:
1. Can I convert my CE database file into an SQL Server Express file?
2. Do I have to re-write all my forms that are using the database? I am planning on creating my SQL Server Express database with the same table names and the same field names, data types, etc.
I use Ms VB 2008 express edition with SQL server express. I want to know what is the reference to be added to make a connection the SQL express database?
View 1 RepliesI have an SQl Connection: Con
con.close
after I close the connection I cannot copy the Sql Express Db because it is still in use but I have CLOSED the connection.
I'm searching a free reporting tool for vb.net express. I only want pdf export and the basic functionality of a reporting tool (grouping, functions, lines, etc). I use postgresql server.What free tools are there out?
View 10 RepliesAnyone know of any free reporting tools - I am using vb.net express, which doesn't have any report features with it.
View 2 RepliesThe SaveFileDialog that opens up while clicking the export button of the CrystalReportViewer by default filters the predefined file types. Is it possible to custom define which files to be filtered?
View 5 RepliesI downloaded the free Visual Basic Express Edition to create an application that connects to a Mysql database. I searched for the connection string and found a bunch of different ones.I have no idea which one should I use with Visual Basic Express Edition. I have been using PHP, javascript and mysql for a couple of years, but I have never used Visual Basic and have everything to learn.
View 2 RepliesI'm at an absolute loss here, I've read so many different things.I just want to add new records to a database I created using SQL Server 2008 with SQL statements in Visual Basic Express 2008. But I can't even connect/get it to recognise the database I created.The database name is 'database.mdf' and is situated in the MSSQL/DATA folder. So far I've read I need to use this code;
Code:
Conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data source=database.mdf"
Conn.Open()
[code]....
I have an access 2003 database. I have VS2008 installed. I had SQL 2008 installed and with the problems upsizing I dumped SQL2008 and installed SQL2005. I would like to upsize the Access database to an SQL Express database. When I open Access 2007 and open database tool to do an upsize, I get ODBC-Failed.
View 3 RepliesI have just installed VB.NET 2003 and I am trying to manage some databases using SQL Server 2005 Express.When I try accessing the database via the data connection tab, I get the following message.
Quote: You have connected to a version of SQL Server later than SQL Server 2000. The version of Visual Studio or Access that you are using was released before the version of SQL Server to which you are connected. For this reason, you might encounter problems.
Please check with Microsoft to see if there is a service pack that you should apply to Visual Studio or Office in order to get support for the version of SQL Server to which you are connected.You can continue but any new object types might not be enumerated, and it will not be possible to save any objects or database diagrams that you create using the Visual Database Tools.I can not add tables or manage data fields. Does anyone know how to get the patch referred to in the message above? I can not find it via google or this forum.
I need to create a function which have either 1 parameter with a string as data type or 2 parameters with double as data type.Something like the substring method.
View 2 Replies1.Establishing a connection to a database(preferably one that is inherit within the project and can travel with it)
2. Setting the correct references to the database ( I tried connecting via JET with windows 7 and I get an error that I cannot use JET)
3. Query the database (Access) with SQL, and return those results to a recordset.
4. Loop through the recordset.
5. close the database connection
6. Open recordset and write data to table.
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For years now I have been using access as my database. But with the SQL server Express version around I have been wondering if it is not better to use this instead of access. Note: I only develop applications for small businesses and a limited set of users. So what do you guys prefer and recommend?
View 2 RepliesI have been using Access 200 as my database of choice with Visual Basic 2008 Express.I am trying to start usingSQL Server Express but having a difficult time with it. All of the instrctions I have tri9ed seem to be written for someone who already knows the answers. Here's my problem.I wrote a program using Access, with one table and five queries and it works fine. Using that program as a baseI created an SQL Server database within Visual basic. Naturally I changed my code to reflect SQL rather then OLEDB.When I try to run the program I get an error message telling me that the database is not registered. When I use the SQL Server Management Studio Expres, it shows my database by give a big message that the database is not registered.
View 3 Repliesanyone know a good free reporting tool compatible with oracle database and visual studio express?
View 3 RepliesI'v designed a ms access database table with one field having Datetime datatype. I can Insert data into it from vb.net front end by trns_dt DateTime.Now.DateBut when I fetch records from the tableand assign the dataset datasource as da, it shows datatype mismatch error.
daleDbDataAdapter("SelectDaily_Transactiondtp_from_dt.value dtp_To.value con)
dsDataSet
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We are testing the visual basic 2010 ee in one of the computing suites at a secondary high school. The installation was fine When we tried opening or saving a project it saves it into a default location i.e my documents. The problem withthis is pupils dont have access to c:. They their own drive on the network (h:) where they save their work. When i went and changed the settings in VB in tool > options.
View 3 RepliesI'm developing a windows form app in visual studio 2008 express. I'm usin a sql compact 3.5 database on it through the program, several changes are made to database data, and so, i have on form1_closing event, a code to save the dataset back to database, something like:
Private Sub Form1_Closing(ByVal sender As System.Object, ByVal e As System.EventArgs)
Me.Validate()
[CODE]................
But when i run my program on the debugger, the changes i mkae, don't get saved, are lost...is this a charecteristic of debugger, or is my "saving code" wrong?
I already built the program, and the data is not being saved. how to saving the data ? by the way, all changes to dataset are made something like this:
[code]:......................