Unable to execute ConnectionString in MS visual Studio 2010 - sql

Question

I've been stuck with this for the past week and would be very glad if you guys could help.
I'm working on vb with MS visual studio 2010. I currently have a database under a asp.net folder named "app_data".
I'm trying to execute a connectionString command via web.config file.
Web Config:
<connectionStrings>
<add name="mysqlcon" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\public.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
Main code:
Dim a As String = ConfigurationManager.ConnectionStrings("mysqlcon").ConnectionString
Dim conn As New MySqlConnection(a)
Try
conn.Open()
MsgBox("good")
conn.Close()
Catch ex As MySqlException
MsgBox(ex.Message)
Finally
conn.Dispose()
End Try
I'm getting the following error(line 10 is being highlighted):
Server Error in '/MP' Application.
Keyword not supported.
Parameter name: attachdbfilename
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ArgumentException: Keyword not supported.
Parameter name: attachdbfilename
Source Error:
Line 8: Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Line 9: Dim a As String = ConfigurationManager.ConnectionStrings("mysqlcon").ConnectionString
Line 10: Dim conn As New MySqlConnection(a)
Line 11:
Line 12:
Stack Trace:
[ArgumentException: Keyword not supported.
Parameter name: attachdbfilename]
MySql.Data.MySqlClient.MySqlConnectionStringBuilder.ValidateKeyword(String keyword) +108
MySql.Data.MySqlClient.MySqlConnectionStringBuilder.set_Item(String keyword, Object value) +18
System.Data.Common.DbConnectionStringBuilder.set_ConnectionString(String value) +185
MySql.Data.MySqlClient.MySqlConnection.set_ConnectionString(String value) +289
MySql.Data.MySqlClient.MySqlConnection..ctor(String connectionString) +26
test.Button1_Click(Object sender, EventArgs e) in C:\Users\God\Desktop\VB\MP\test.aspx.vb:10
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563
Would be glad if you guys can help.

Answer 1

user2072778, try this one, it might work:
<add name="mysqlcon" connectionString="Data Source=|DataDirectory|public.mdf" providerName="System.Data.SqlClient" />
And this is a good page for searching this theme: http://www.connectionstrings.com/sql-server-2008

Answer 2

You are trying to connect using a MySQL connection object:
Dim conn As New MySqlConnection(a)
with a Microsoft SQL Server connection string:
<add name="mysqlcon" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\public.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" />
They just don't match.
If you want to connect to a MySQL database, change the connection string accordingly.