how can I delete database?

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I want to delete a database soon after creating it...
I used drop database query. but when I am deleting it I am getting a msg that database is currently is in use, you can't delete it. can anyone help me with this?

Posted 7-Mar-14 16:39pm

Ahmed Tamseer

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Snehasish_Nandy · Answer 1 · 2014-03-07T17:13:00

Solution 1

You can't delete like this when your application using it.you have to change your database.

try

SQL

USE master;
    GO

running this before you are running the drop query.
Hope it will help..

Posted 7-Mar-14 17:13pm

Snehasish_Nandy

gmhanna · Answer 2 · 2014-03-07T17:21:00

You need to drop everything inside of the database before you can drop the database. Make sure you drop your tables and indexes, then you can drop your database.

C#

using (SqlConnection connection = new SqlConnection(connectionString))
{
    if (DbTableExists(connectionString, TableName))
    {
        strCheckTable = "DROP TABLE " + TableName;
        command = new SqlCommand(strCheckTable, connection);
        command.CommandType = CommandType.Text;
        connection.Open();
        command.ExecuteNonQuery();
    }
}

if (DBExist(connectionString, databaseName))
{
    strCheckTable = "DROP DATABASE " + databaseName;
    command = new SqlCommand(strCheckTable, connection);
    command.CommandType = CommandType.Text;
    connection.Open();
    command.ExecuteReader();
    connection.Close
}

private static bool DBExist(string connectionString, string databaseName)
{
    int i32;
    using (SqlConnection connection = new SqlConnection(connectionString))
    {
        string strCheckTable =
           "SELECT COUNT(name) FROM master.sys.databases WHERE name = '" + databaseName + "'";

         SqlCommand command = new SqlCommand(strCheckTable, connection);
         command.CommandType = CommandType.Text;
         connection.Open();
         i32 = Convert.ToInt32(command.ExecuteScalar());
         return (i32 == 1);
    }
}

private static bool DbTableExists(string strConnection, string strTableNameAndSchema)
{
     using (SqlConnection connection = new SqlConnection(strConnection))
     {
         string strCheckTable =
            String.Format(
                      "IF OBJECT_ID('{0}', 'U') IS NOT NULL SELECT 'true' ELSE SELECT 'false'",
                      strTableNameAndSchema);

         SqlCommand command = new SqlCommand(strCheckTable, connection);
         command.CommandType = CommandType.Text;
         connection.Open();

         return Convert.ToBoolean(command.ExecuteScalar());
      }
}