SQL data export: The ConnectionString property has not been initialized. (System.Data)

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SQL-Server-2008

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I am trying to export my database as .Net SqlClient Data Provider format but I keep getting this error message:

The operation could not be completed ADDITIONAL INFORMATION: The ConnectionString property has not been initialized. (System.Data)

Program Location: code:

       at System.Data.SqlClient.SqlConnection.PermissionDemand()
       at System.Data.SqlClient.SqlConnectionFactory.PermissionDemand(DbConnection outerConnection)
       at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
       at System.Data.SqlClient.SqlConnection.Open()
       at Microsoft.SqlServer.Dts.DtsWizard.DTSWizard.GetOpenedConnection(WizardInputs wizardInputs, String connEntryName)
       at Microsoft.SqlServer.Dts.DtsWizard.Step2.OnLeavePage(LeavePageEventArgs e)

but my app config has the connection string declared as

code:

HTML

<configuration>
    <configsections>
    </configsections>
    <connectionstrings>
        <add name="WindowsApplication2.My.MySettings.ConnectionString">
            connectionString="Data Source=ARULJUSTIN\SQLEXPRESS;Initial Catalog=firemaintain;Integrated Security=True;Pooling=False"
            providerName="System.Data.SqlClient" />
    </add></connectionstrings>
    <startup>
        <supportedruntime version="v4.0" sku=".NETFramework,Version=v4.0,Profile=Client" />
    </startup>
</configuration>

Posted 26-Nov-13 19:58pm

Justin Arokiaraj

Updated 26-Nov-13 20:09pm

Maciej Los

v2

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Comments

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 27-Nov-13 2:09am

We need to see the code where you are connecting to Database.

Justin Arokiaraj 27-Nov-13 2:42am

Private Sub Addpump_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim conn As New SqlConnection
Dim ada1 As New SqlDataAdapter()
Dim ds1 As New DataSet
Conn = New SqlConnection("Persist Security Info=false;User Id=justin;Data Source=ARULJUSTIN\SQLEXPRESS;Initial Catalog=firemaintain;Integrated Security=True;Pooling=False")
Conn.Open()
ada1 = New SqlDataAdapter("select Pumpno,Pumplocation,Pumptype,recordactive from pumpRooms", Conn)
ada1.Fill(ds1)
DataGridView1.DataSource = ds1.Tables(0)
End Sub

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 27-Nov-13 4:27am

On which line it is throwing the Exception.
You have ConnectionString declared in web.config, but you are not using it in code.

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Maciej Los · Answer 1 · 2013-11-28T10:27:00

Solution 2

In my opinion, the connection string is wrong. To set it properly, please see: connectionstring for ms sql server 2008/[^]

For further information, please see:
How to: Read Connection Strings from the Web.config File[^]
Connection Strings and Configuration Files[^]

Posted 28-Nov-13 10:27am

Maciej Los