was using c# to develop some application and wanted to connect my application(windows) with SQL database.
using sql 2005 express and visual c# express;
but it kept on throughing the following exception while i try to run my app.
so help me out
"An attempt to attach an auto-named database for file C:\Program Files Microsoft SQL Server MSSQL.1MSSQL Data mann.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share."

Could you send code you are using?

here u are !

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        SqlConnection SqlConn;
        SqlDataAdapter dat;
        DataSet set;



        private void Form1_Load(object sender, EventArgs e)
        {

            }

        private void button1_Click(object sender, EventArgs e)
        {
            string constring = "Data Source=.\\SQLEXPRESS;AttachDbFilename=C:\\Program Files Microsoft SQL Server MSSQL.1 MSSQL Data adila.mdf ;Integrated Security=True;Connect Timeout=30;User Instance=True";
            string updatrec = "INSERT INTO one(name,fathers) VALUES   (@name, @fathers)";
            SqlConn = new SqlConnection();
            SqlConn.ConnectionString = constring;

            SqlCommand sqlCmd = new SqlCommand(updatrec, SqlConn);

            sqlCmd.Parameters.AddWithValue("@name", textBox1.Text);
            sqlCmd.Parameters.AddWithValue("fathers", textBox2.Text);



            try
            {
                SqlConn.Open();
                sqlCmd.ExecuteNonQuery();
            }
            catch (System.Exception Exec)
            {
                MessageBox.Show(Exec.Message);
            }

            SqlConn.Close();

        } 
        }
    }

Edited 3 Years Ago by mike_2000_17: Fixed formatting

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