How to get list of all database from sql server in a combobox using c#.net

Question

I am entering the source name userid and password through the textbox and want the database list should be listed on the combo box so that all the four options sourcename, u

Answer 1

Simply using GetSchema method:

using (SqlConnection connection = GetConnection())
{
    connection.Open();
    DataTable dtDatabases = connection.GetSchema("databases");

    //Get database name using dtDatabases["database_name"]
}

Answer 2

you can use on of the following queries:

• EXEC sp_databases
• SELECT * FROM sys.databases

Serge

Answer 3

First add following assemblies:

• Microsoft.SqlServer.ConnectionInfo.dll
• Microsoft.SqlServer.Management.Sdk.Sfc.dll
• Microsoft.SqlServer.Smo.dll

from

C:\Program Files\Microsoft SQL Server\100\SDK\Assemblies\

and then use below code:

var server = new Microsoft.SqlServer.Management.Smo.Server("Server name");

foreach (Database db in server.Databases) {
    cboDBs.Items.Add(db.Name);
}

Answer 4

   How to get list of all database from sql server in a combobox using c# asp.net windows application  
     try
        {
            string Conn = "server=.;User Id=sa;" + "pwd=passs;";
            SqlConnection con = new SqlConnection(Conn);
            con.Open();

            SqlCommand cmd = new SqlCommand();
         //   da = new SqlDataAdapter("SELECT * FROM sys.database", con);
            cmd = new SqlCommand("SELECT name FROM sys.databases", con);
           // comboBox1.Items.Add(cmd);
            SqlDataReader dr;
            dr = cmd.ExecuteReader();
            if (dr.HasRows)
            {
                while (dr.Read())
                {
                    //comboBox2.Items.Add(dr[0]);
                    comboBox1.Items.Add(dr[0]);
                }
            }

           // .Items.Add(da);
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }

Answer 5

sys.databases

SELECT name
FROM sys.databases;

Edit:

I recommend using IDataReader, returning a List and caching the results. You can simply bind your drop down to the results and retrieve the same list from cache when needed.

public List<string> GetDatabaseList()
{
    List<string> list = new List<string>();

    // Open connection to the database
    string conString = "server=xeon;uid=sa;pwd=manager; database=northwind";

    using (SqlConnection con = new SqlConnection(conString))
    {
        con.Open();

        // Set up a command with the given query and associate
        // this with the current connection.
        using (SqlCommand cmd = new SqlCommand("SELECT name from sys.databases", con))
        {
            using (IDataReader dr = cmd.ExecuteReader())
            {
                while (dr.Read())
                {
                    list.Add(dr[0].ToString());
                }
            }
        }
    }
    return list;

}

Answer 6

    using (var connection = new System.Data.SqlClient.SqlConnection("ConnectionString"))
    {
        connection.Open();
        var command = new System.Data.SqlClient.SqlCommand();
        command.Connection = connection;
        command.CommandType = CommandType.Text;
        command.CommandText = "SELECT name FROM master.sys.databases";

        var adapter = new System.Data.SqlClient.SqlDataAdapter(command);
        var dataset = new DataSet();
        adapter.Fill(dataset);
        DataTable dtDatabases = dataset.Tables[0];
    }