Using (var conn = new SqlConnection(connection)) String connection = "Data Source=Excel-PC Initial Catalog=Northwind.MDF Trusted_Connection=True " SqlConnection connection = new SqlConnection("Data Source=Excel-PC Initial Catalog=Northwind.MDF Trusted_Connection=True ") ĭataTable dt = (DataTable)dataGridView1.DataSource OleDbDataAdapter da = new OleDbDataAdapter("SELECT * FROM ", conn) įinally.DGV to SQL Server: private void button8_Click(object sender, EventArgs e) OleDbConnection conn = new OleDbConnection(jet) String strConn = string.Format("Provider=.12.0 Data Source= Extended Properties=Excel 8.0", path) Here is a C# script that hits a SQL Server DB on my machine.Įxcel to DGV: private void button1_Click(object sender, EventArgs e) Server=myServerAddress Database=myDataBase Trusted_Connection=True Try it with the easiest possible scenario (no security). I'm new to all this, so sorry if I am missing something obvious. I can view my database, its table, and its data in the SQL Server Object Explorer inside Visual Studio - regardless of whether I'm running it as Administrator or not. I'm running Visual Studio as Administrator (this got past a prior issue that wouldn't even let me browse to the database without prompting an error message that I didn't have permission to open the database file). Operating system error 5: "5(Access is denied.)".Īn attempt to attach an auto-named database for file C:\Program Files\Microsoft SQL Server\MSSQL13.SQLEXPRESS\MSSQL\DATA\MyDatabase.mdf failed.Ī database with the same name exists, or specified file cannot be opened, or it is located on UNC share. Unable to open the physical file "C:\Program Files\Microsoft SQL Server\MSSQL13.SQLEXPRESS\MSSQL\DATA\MyDatabase.mdf". The issue now is that when I go through the Entity Data Model Wizard (existing database) and go to establish a New Connection, select "Microsoft SQL Server Database File (SqlClient)" and browse to my database - the Test Connection generates the error: I've searched MSDN and this site for days but haven't found a way to solve this. I would like to connect it as a data source within Entity Framework in my solution (which is in c#). I keep running into issues just trying to make a connection from my c# program in Visual Studio 2017 Express to a small local database with one table I created in Sql Server Express.
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