Error while setting up connection and adding database Tables

Question

Error 1
The name 'My' does not exist in the current context
C:\Users\levent 1\documents\visual studio 2010\Projects\DBCustomAction\DBCustomAction\VbDeployInstaller.cs
53 37
DBCustomAction
Error 2
The name 'Interaction' does not exist in the current context
C:\Users\levent 1\documents\visual studio 2010\Projects\DBCustomAction\DBCustomAction\VbDeployInstaller.cs
75 5
DBCustomAction
Error 3
'System.Collections.Specialized.StringDictionary' does not contain a definition for 'Item' and no extension method 'Item' accepting a first argument of type 'System.Collections.Specialized.StringDictionary' could be found (are you missing a using directive
or an assembly reference?) C:\Users\levent 1\documents\visual studio 2010\Projects\DBCustomAction\DBCustomAction\VbDeployInstaller.cs
84 36
DBCustomAction
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration.Install;
using System.Linq;
using System.IO;
using System.Reflection;
using System.Data.SqlClient;
namespace DBCustomAction
    [RunInstaller(true)]
    public partial class VbDeployInstaller : System.Configuration.Install.Installer
       System.Data.SqlClient.SqlConnection masterConnection = new System.Data.SqlClient.SqlConnection();
public VbDeployInstaller() : base()
//This call is required by the Component Designer.
InitializeComponent();
//Add initialization code after the call to InitializeComponent
private string GetSql(string Name)
try {
// Gets the current assembly.
Assembly Asm = Assembly.GetExecutingAssembly();
// Resources are named using a fully qualified name.
Stream strm = Asm.GetManifestResourceStream(Asm.GetName().Name + "." + Name);
// Reads the contents of the embedded file.
StreamReader reader = new StreamReader(strm);
return reader.ReadToEnd();
} catch (Exception ex) {
throw ex;
private void ExecuteSql(string DatabaseName, string Sql)
System.Data.SqlClient.SqlCommand Command = new System.Data.SqlClient.SqlCommand(Sql, masterConnection);
// Initialize the connection, open it, and set it to the "master" database
masterConnection.ConnectionString = My.Settings.masterConnectionString;
Command.Connection.Open();
Command.Connection.ChangeDatabase(DatabaseName);
try {
Command.ExecuteNonQuery();
} finally {
// Closing the connection should be done in a Finally block
Command.Connection.Close();
protected void AddDBTable(string strDBName)
try {
// Creates the database.
ExecuteSql("master", "CREATE DATABASE " + strDBName);
// Creates the tables.
ExecuteSql(strDBName, GetSql("sql.txt"));
} catch (Exception ex) {
// Reports any errors and abort.
    Interaction.MsgBox("In exception handler: " + ex.Message);
throw ex;
public override void Install(System.Collections.IDictionary stateSaver)
base.Install(stateSaver);
AddDBTable(this.Context.Parameters.Item("dbname"));

Answer 1

Hi osmniv,
I tested the code, it has three error when compiling.
Error 1 The name 'My' does not exist in the current context C:\Users\levent 1\documents\visual studio 2010\Projects\DBCustomAction\DBCustomAction\VbDeployInstaller.cs 53 37 DBCustomAction
In C#, there is no "My" key word, you need to use this method to use the settings.
http://msdn.microsoft.com/en-us/library/aa730869(v=vs.80).aspx
masterConnection.ConnectionString = Properties.Settings.Default.masterConnectionString;
Error 2 The name 'Interaction' does not exist in the current context C:\Users\levent 1\documents\visual studio 2010\Projects\DBCustomAction\DBCustomAction\VbDeployInstaller.cs 75 5 DBCustomAction
You need to add these references to the project, Microsoft.VisualBasic,
Microsoft.Expression.Interactions AND System.Windows.Interactivity.  Right click on the project, choose the add -> reference -> choose the references.
then, add the using statement:
using Microsoft.VisualBasic;
Error 3
'System.Collections.Specialized.StringDictionary' does not contain a definition for 'Item' and no extension method 'Item' accepting a first argument of type 'System.Collections.Specialized.StringDictionary' could be found (are you missing a using directive
or an assembly reference?) C:\Users\levent 1\documents\visual studio 2010\Projects\DBCustomAction\DBCustomAction\VbDeployInstaller.cs
84 36
DBCustomAction
In C#, you could use the Parameters["dbname"] to get the indexer of element directly.
AddDBTable(this.Context.Parameters["dbname"]);
If you have any other concern regarding this issue, please feel free to let me know.
Best regards,
Youjun Tang
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