I am trying to make a database application. I added local database from
add > new item > local database.sdf
In Server Explorer, I created a table in the database. But I am having trouble connecting to it.
I want to show all the data in a DataGrid.
My code:
string ConnectionString = @"Data Source=""c:\users\asus\documents\visual studio 2012\Projects\WpfApplicationLocalDB\WpfApplicationLocalDB\LocalDB.sdf""";
SqlConnection conn = new SqlConnection(ConnectionString);
conn.Open();
SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM Student", conn);
DataTable dt = new DataTable();
da.Fill(dt);
conn.Close();
List<DataRow> lis = dt.AsEnumerable().ToList();
DataGridView.ItemsSource = lis;
But when I build it, Visual Studio finds conn.open();
error. A message says that
SqlException was unhandled by user
Please help...
Also, can anyone suggest a tutorial of how can I create a simple database application in C#? Please help.
If you're using a .sdf
file, you're using Microsoft SQL Server Compact Edition (SQL Server CE).
When using SQL Server CE, you must use SqlCeConnection
and SqlCeCommand
classes - not SqlConnection
and SqlCommand
(those are for the "full", server-based versions of SQL Server)
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