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C# set desktop path for database

I have created a project in visual studio, that uses a database to store and retrieve details.
I want to deliver an executable and just let the user know that he has to place the database file on the desktop.
if i do
String myDesktop = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
it looks like i cant set the database position after like this:
using (SqlCeConnection cn = new SqlCeConnection(#"Data Source = myDesktop\Database1.sdf))
Any help?

Form a correct path using the Path.Combine method of the Path class
string conString = "Data Source=" + Path.Combine(myDesktop, "Database1.sdf;");
using (SqlCeConnection cn = new SqlCeConnection(conString))

OleDb connection to Access 2013 database

I have a program that reads from and writes to an Access database. It works fine on my own computer but when I tried to download it on a new computer that has the new Office 2013 programs it said that the provider in connection string didn't work. Here's my connection string:
string filepath = #"C:\FamilyFoundations\ProvidentLiving\App\Data\"; // Hold the path to the file
string dbPath = filepath + "GoalsDB.accdb"; // Holds the name of our data base
// string to create our database
string db = "Provider=Microsoft.JET.OLEDB.4.0;Data Source=" + dbPath + "; JET OLEDB:Engine Type=5";'
Does my string need to be changed or is there something I need to download on my friends computer? My first thought is that there is a new Microsoft.JET that I need to include, but please correct me if I'm wrong.

No start database manager command was issued error

I have a DB2 expresss in my machine and I am able to query from the database using command window (after following two commands):
set DB2INSTANCE=db2inst1
db2 connect to tims user
Now, when I try to connect to the database from a C# console application, I am getting following errors with different connection strings.
Attempt 1
string connectionString = #"Provider = IBMDADB2; Database = TIMS; Hostname = localhost; CurrentSchema=db2inst1; ";
SQL1032N No start database manager command was issued. SQLSTATE=57019
Attempt 2
string connectionString = #"Provider = IBMDADB2; Database = TIMS; CurrentSchema=db2inst1; ";
SQL1031N The database directory cannot be found on the indicated file system. SQLSTATE=58031
What should be the correct connection string for this scenario?
CODE
string connectionString = #"Provider = IBMDADB2; Database = TIMS; Hostname = localhost; CurrentSchema=db2inst1; ";
OleDbConnection myConnection = new OleDbConnection();
myConnection.ConnectionString = connectionString;
myConnection.Open();

Do you have multiple DB2 instances running on your machine? You can get a list of instances that exist by executing the db2ilist command.
If you have to execute the set DB2INSTANCE=db2inst1 statement when you open a DB2 Command Window in order to connect to the TIMS database with the db2 connect to TIMS command, then you need to ensure that the environment for your C# application is configured the same way.
You can do this in a number of ways:
by setting the DB2INSTANCE environment variable before starting your application
Change the default DB2 instance on your machine by using the command db2set -g DB2INSTDEF=db2inst1 (** see note below)
Use a TCPIP connection string (as described by #Bhaarat) so that your application does not depend on the database catalog for the default instance
Note: Before changing DB2INSTDEF you may want to see what the current value is, by executing the command db2set -all and looking for DB2INSTDEF in the output. Also note that changing the default instance may affect other applications that run on your machine.

refer this url http://www.c-sharpcorner.com/uploadfile/nipuntomar/connection-strings-for-ibm-db2/
your connection string should be something like this
Provider=IBMDADB2;Database=urDataBase;Hostname=urServerAddress;Protocol=TCPIP;Port=50000;
Uid=urUsername;Pwd=urPassword;
in more you can refer this too
http://www.codeproject.com/Articles/4870/Connect-to-DB2-from-Microsoft-NET

My DB2 insatnce name is "db2inst1" and it was working fine when I used DB2 command window.
Now I made following settings and it is working fine now. :-)
Created a port in the C:\Windows\System32\drivers\etc\services file (db2c_db2inst1 50010/tcp)
Set the “TCP/IP Service Name” ( = db2c_db2inst1”) for the instance. Verified using “db2 get dbm cfg” command
Updated the environment variable DB2INSTANCE with the value “db2inst1”
Restarted the machine
Started the instance
ConnectionString
"Provider = IBMDADB2; Database = TIMS; Hostname = localhost; Protocol = TCPIP; Port = 50010; Uid = myUserID; Pwd = myPassword";
CODE
string queryString = "SELECT * FROM DBATABC";
try
{
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
OleDbCommand command = new OleDbCommand(queryString, connection);
connection.Open();
OleDbDataReader reader = command.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
if (!reader.IsDBNull(0))
{
string companyCode = reader.GetString(0).ToString();
}
}
}
reader.Close();
}
}
Note: Try to create DSN for ODBC and use ODBC connection in a sample SSIS package. This will help in resolving OLEDB connection issues also (that are common to both)

Proper way to connect to a local .mdb file using SqlDataReader?

The connection always times out without generating an error message even though it is within trycatch. I suspect there is something wrong with the connection string. This is what I currently have:
string path = #"C:\PATH\TO\wantedDB.mdb";
if (!File.Exists(path))
throw new FileNotFoundException("File not found.");
else
Console.WriteLine("File found."); // File is found, so nothing wrong with that.
string connectionstring = "Database=wantedDB;AttachDBFilename=" +
path + ";Server=(local)";
using (SqlConnection conn = new SqlConnection(connectionstring))
{
Console.WriteLine("Opening connection...");
conn.Open();
Console.WriteLine("Connection opened."); // Program never gets here.
I have also tried a relational path in connection string like:
string connectionstring = "Database=wantedDB;AttachDBFilename=\"wantedDB.mdb\";Server=(local)";
The db is not protected by a password. I have MS Access installed, does that affect this somehow? What am I missing?

To connect to a mdb file you should use the OLEDB connector:
var con = new OleDbConnection("Provider=Microsoft.JET.OLEDB.4.0;" + "data source=C:\\wantedDB.mdb;");

C# - Get file path from connection string

Is there an existing method in C# to extract the file path from a string that represents a ConnectionString to a SqlCE .sdf file? I want to check if the file exists at initialization and back it up if the file has been modified.
Sample connection string:
strConn = "Data Source=|DataDirectory|\dbAlias.sdf";

You can use SqlCeConnectionStringBuilder class to parse existing Sql Compact connection string.

A bit late perhaps, but I came across this question wile struggling with the same problem. You can find the location of the |DataDirectory| folder with AppDomain.CurrentDomain.GetData("DataDirectory"). So your connectionstring can be translated like this:
strConn .Replace("|DataDirectory|", AppDomain.CurrentDomain.GetData("DataDirectory").ToString())

You could just create the connection and get the data source from it as a property:
string data;
using (var conn = new SqlConnection(connectionString)) {
data = conn.DataSource;
}

For LocalDB and SqlConnection (not CE):
public static string GetFilePathFromConnectionString(string connectionString)
{
var attachDbFileName = new SqlConnectionStringBuilder(connectionString).AttachDBFilename;
return attachDbFileName.Replace("|DataDirectory|", AppDomain.CurrentDomain.GetData("DataDirectory").ToString());
}