I have hardcoded the data directory for the database. Since I want to avoid it, I have decided to use the FolderBrowserDialog
and store the dialog string into the application settings.
This is the hardcoded code snippet, which can open the SQL connection:
AppDomain.CurrentDomain.SetData("DataDirectory", @"C:\Users\Osman\Documents\Visual Studio 2013\Projects\CompanyWPF\CompanyWPF\");
try
{
using (SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\Produkt.mdf;Integrated Security=True"))
{
con.Open();
}
}
catch (Exception ex)
{
MessageBox.Show("Error\n" + ex.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
But when I'm using the stored string from the application settings:
AppDomain.CurrentDomain.SetData("DataDirectory",@"" + Properties.Settings.Default.ConnectionString);
try
{
using (SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=@|DataDirectory|\Produkt.mdf;Integrated Security=True") )
{
con.Open();
}
}
catch (Exception ex)
{
MessageBox.Show("Error\n" + ex.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
then the following error occurs:
Invalid value for key 'attachdbfilename'.
I have set a breakpoint, and the stored string from the application setting has the value:
C:\\Users\\Osman\\Documents\\Visual Studio 2013\\Projects\\CompanyWPF\\CompanyWPF\\
I do not sure what you are going to do but i think here is the problem
using (SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=@|DataDirectory|\Produkt.mdf;Integrated Security=True") )
Use This Instead
using (SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\Produkt.mdf;Integrated Security=True") )
Note : Remove @ From this "@|DataDirectory| "
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