C＃项目-InstallShield，安装后运行时出现MySql错误

Question

I have a project in C# which is created in Visual Studio 2013. I want to create an installer using Install Shield free version. I created an installer and trying to run it on other computer but, when I run it and trying to log into program, I have problems about mysql database. Error message is:

Unhandled exception has occured in you application. If you click Continue, the application will ignore this error and attempt to continue. If you click Quit, the application will close immediately.

Cannot connect.

If I click on details button, I have a serie of errors which refers on Mysql. Example:

System.Exception: Cannot connect ---> MySql.Data.MySqlClient.MySqlException: Unable to connect to any of the specified MySQL hosts.
at MySql.Data.MySqlClient.NativeDriver.Open()
at MySql.Data.MySqlClient.Driver.Open()
at MySql.Data.MySqlClient.Driver.Create(MySqlConnectionStringBuilder settings)
at MySql.Data.MySqlClient.MySqlPool.GetPooledConnection()
at MySql.Data.MySqlClient.MySqlPool.TryToGetDriver()
at MySql.Data.MySqlClient.MySqlPool.GetConnection()
at MySql.Data.MySqlClient.MySqlConnection.Open()
at simulator.ConnConfig.getConnection()

simulator is the name of the project. ConnConfig is a class where is the connection and getConnection() is a function from ConnConfig which return connection. II tried to install on another computer .NET Framework 4.5.2, SQL Server, but also didn't worked. In my project, I use localhost server where I have a database with 2 tables. My question is, is there any possibility to add that localhost database to installer and use it on another computer? And what redistributables requires this operation? Also, I have installed on computer .NET Framework 4.5, Sql Server 2012..but when I try do add them in InstallShield via Redistributables, but it keeps saying that Needs to be downloaded . Why?

UPDATE

I have this Class where I make the conenction. But I receive error: Additional information: Illegal characters in path. at that line:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SQLite;

namespace simulator
{
    class ConnConfig
    {
        private static string conn = "Data Source=c:\aplicatie.db;Version=3;Password=myPassword;";
        public static SQLiteConnection connect = null;

        private ConnConfig()
        {

        }
        public static SQLiteConnection getConnection()
        {
            SQLiteConnection connect = null;
            try
            {
                connect = new SQLiteConnection(conn);
                connect.Open();// here I receive the error
                return connect;
            }
            catch (SQLiteException e)
            {
                throw new Exception("Cannot connect", e);
            }
        }
    }
}

UPDATE 3

In that class I make the connection to database. In the other forms I just use tables and their data. For connection to program, I use a login form which uses this class to getConnection() . I created that database by adding an ADO.NET in simulator project. And with that, it comes those 2 tables that I already have in localhost server. So, Is ok if I have to create another empty database with new tables, but where to include that code or how to use it, because I don't get how that script works..where should I put it?

Answer 1

If your database is going to be installed on each client and your tables are not massive you might want to look at something lighter like SQLite which doesn't need any installation just the dlls and is very fast and efficient and only runs when your program does.

As for for the Needs to be Downloaded issue, it seems you have not setup your prerequisite correctly, you an correct this by following the steps in this article Adding InstallShield Prerequisites, Merge Modules, and Objects to Basic MSI and InstallScript MSI Projects

You might want to look into determining if MySQL is the right solution for you.

SQLite vs MySQL vs PostgreSQL: A Comparison Of Relational Database Management Systems

And to see the limitations of SQLite SQLite

Because honestly seems like overkill to install MySQL on every system. If you had one server with MySQL on the network, okay. But on every system seems like a bad idea.

As far as connecting to an SQLite database here is a List of Connection Strings for SQLite

See this topic on how to create Databases and tables Create SQLite Database and table

Answer 2

My guess is your program doesn't bundle up the database alongside the setup upon deployment. This may be due to the fact that you didn't mark your database as a Data File in the Project Files . Try this, right click on your project name in Solution Explorer and select Properties from Menu. From the horizontal tabs click on the Publish Tab. Under Install Mode and Settings click the Application Files button. A dialog box appears with all Application files. Set your database Publish Status to Data File from the drop down on the corresponding cell. This way your database will be bundled together with the setup upon publishing. Hope this helps.

Answer 3

您可以通过ODBC访问SQLite。