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04.08.2008 at 09:03AM PDT, ID: 23305165

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8.5

Connect to MySQL with Window Mobile 5.0 VB.NET App

Zones: Windows MobileProgramming, Windows Mobile (Pocket PC / Win CE) Operating Systems, Visual Studio .NET 2005

I am writing a Window Mobile 5.0 application in VB.NET in Visual Studio 2005, I want to let my application connect to a database which is mySQL on a server, how do I do that??? It will be best if there is a website for me to learn how to do it???

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Question Stats

Zone: Programming

Question Asked By: KenTan85

Solution Provided By: smidgie82

Participating Experts: 2

Solution Grade: A

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04.08.2008 at 09:08AM PDT, ID: 21306676

Rank: Sage

Mikal613:

A) you can create a web service that connects to the mySQL database and then reference the web service from the Mobile

04.08.2008 at 09:55AM PDT, ID: 21307214

KenTan85:

Web service mean using JSP, ASP to connect to the mySQL database??? If that is the case, how to I call JSP or ASP in my window mobile VB.NET application??? Is there an example I can reference to???

04.08.2008 at 09:56AM PDT, ID: 21307226

Rank: Sage

Mikal613:

http://www.codeproject.com/KB/webservices/myservice.aspx

04.08.2008 at 10:02AM PDT, ID: 21307292

KenTan85:

The link you given is a C# project, I am doing a VB language, is it possible to connect directly to MySQL without going thru web services???

04.08.2008 at 10:06AM PDT, ID: 21307327

smidgie82:

According to the documentation at http://dev.mysql.com/doc/refman/5.0/en/connector-net-versions.html, the MySQL Connector/Net version 5.1 is compatible with the .Net Compact Framework 2.0. So, you should be able to use the MySql* classes from that assembly just like any other ADO.Net classes.

04.08.2008 at 11:40AM PDT, ID: 21308243

Rank: Sage

Mikal613:

the above component should work

04.09.2008 at 07:44AM PDT, ID: 21315434

smidgie82:

If you're unfamiliar with ADO.Net data access, or want MySQL-specific code samples, you can refer to the examples on the MySQL site: http://dev.mysql.com/doc/refman/5.0/en/connector-net-examples.html.

04.09.2008 at 07:51AM PDT, ID: 21315515

KenTan85:

smidgie82, I am having problem trying to use those mysqlcommand syntex, seem that I need to import certain library, how should I import them???

04.09.2008 at 07:58AM PDT, ID: 21315606

smidgie82:

You'll need to download the MySQL Connector/Net assembly and save it somewhere on your system (and in a folder in the search path on your embedded system). Then from your project in Visual Studio, add a reference to the assembly. After that, they should be available to your program; but note that they're in the MySql.Data.MySql namespace, instead of System.Data.* like the rest of the ADO.Net classes.

04.09.2008 at 08:03AM PDT, ID: 21315660

KenTan85:

oic... but where do I get this???

04.09.2008 at 08:07AM PDT, ID: 21315709

KenTan85:

http://dev.mysql.com/doc/refman/5.0/en/connector-vstudio-creating.html

This link seem to teach me how to do it but I do not have mysql to select..

04.09.2008 at 08:11AM PDT, ID: 21315763

smidgie82:

You can find the download link for the MySQL Connector/Net assembly at http://dev.mysql.com/downloads/connector/net/5.1.html

04.09.2008 at 08:37AM PDT, ID: 21316042

KenTan85:

how come I had to add system.data as reference for my mysql namespace to work???

Have to delcare Dim myConnection As New MySql.Data.MySqlClient.MySqlConnection
instead of Dim myConnection As New MySqlConnection

why????

04.09.2008 at 08:53AM PDT, ID: 21316189

smidgie82:

It's likely that you have to add the system.data reference because system.data is where the data-access classes reside, and it makes sense for the MySql connector to depend on them. However, if you also add the directive "Imports MySql.Data.MySql", you should be able to use the second declaration you listed instead of being forced to explicitly reference the namespace path (as in the first declaration).

04.09.2008 at 09:51AM PDT, ID: 21316733

KenTan85:

but how do I connect remotely to my computer??? set ip as server parameter??? normally they set server="localhost"

04.09.2008 at 10:33AM PDT, ID: 21317105

smidgie82:

You need to create a connection string and pass it as a parameter to the constructor of the MySqlConnection class. The format of the connection string can be found at http://dev.mysql.com/tech-resources/articles/ebonat-connection-string-vb-net.html .

A typical example might look like:

                       
             Dim MySQLConnectionString As String
Dim MyADOConnection As MySqlConnection
 
MySQLConnectionString = "Server=192.168.1.101;" & _
  "Database=northwind;" & _
  "Uid=user;" & _
  "Pwd=password;" & _
  "Connect Timeout=30;"
MyADOConnection = New MySqlConnection(MySQLConnectionString)
MyADOConnection.Open()

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