Backing up Database in MySQL using C#

Question

I created a Winforms in order to backup my Database. Then When I run my program it gives an Win32Exception was unhandled. \"The system cannot find the file specified\" Altho

Answer 1

I believe you have to mention the user, pwd, db name and the target path..

string path = @"C:\Program Files\MySQL\MySQL Server 5.5\bin\mysqldump.exe -u " + txtBoxDBUsername.Text + @" -p " + txtBoxDBName.Text + @" > " + txtBoxDBName.Text + @".sql"; 

backup: # mysqldump -u root -p[root_password] [database_name] > dumpfilename.sql

restore:# mysql -u root -p[root_password] [database_name] < dumpfilename.sql

http://www.thegeekstuff.com/2008/09/backup-and-restore-mysql-database-using-mysqldump/

Answer 2

You may try this one.

    public void BackUpData(string file)
    {
        using (MySqlConnection con = new MySqlConnection { ConnectionString = config })
        {
            using (MySqlCommand cmd = new MySqlCommand { Connection = con })
            {
                using (MySqlBackup mb = new MySqlBackup { Command = cmd })
                {


                    try
                    {
                        con.Open();

                        try
                        {
                            mb.ExportToFile(file);
                        }
                        catch(MySqlException ex)
                        {
                            msgErr(ex.Message + " sql query error.");
                            return;
                        }
                    }
                    catch(MySqlException ex)
                    {
                        msgErr(ex.Message + " connection error.");
                        return;
                    }



                }

            }

        }

    }

Answer 3

You can use MySqlBackup.NET as alternative to MySqlDump
Documentation:
http://www.codeproject.com/Articles/256466/MySqlBackup-NET-MySQL-Backup-Solution-for-Csharp-V
https://github.com/MySqlBackupNET/MySqlBackup.Net

Sample codes:

Backup a MySQL database

using MySql.Data.MySqlClient; 

then the code,

private void Backup()
{
    string constring = "server=localhost;user=root;pwd=qwerty;database=test;";
    string file = "C:\\backup.sql";
    using (MySqlConnection conn = new MySqlConnection(constring))
    {
        using (MySqlCommand cmd = new MySqlCommand())
        {
            using (MySqlBackup mb = new MySqlBackup(cmd))
            {
                cmd.Connection = conn;
                conn.Open();
                mb.ExportToFile(file);
                conn.Close();
            }
        }
    }
}

Restore a MySQL database

private void Restore()
{
    string constring = "server=localhost;user=root;pwd=qwerty;database=test;";
    string file = "C:\\backup.sql";
    using (MySqlConnection conn = new MySqlConnection(constring))
    {
        using (MySqlCommand cmd = new MySqlCommand())
        {
            using (MySqlBackup mb = new MySqlBackup(cmd))
            {
                cmd.Connection = conn;
                conn.Open();
                mb.ImportFromFile(file);
                conn.Close();
            }
        }
    }
}

Update:
I am one of the author of this library.

Answer 4

I have try that code but problem is occure in before run. exeption is -An unhandled exception of type 'System.IO.FileLoadException' occurred in System.Windows.Forms.dll

Additional information: Could not load file or assembly 'MySql.Data, Version=6.5.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Answer 5

• Don't putt the whole call inside "path = ", you should use "Arguments" to specify arguments, as name says. If library checks for presence of the called file (your whole path) it shouldn't find it!
• Are you sure that path is correct? You should find MySQL Server path using registry, not hard-coding the path, or if it can be not easy for you you can pass it as an argument from command line or specify from your form (settings page).
• You may have missed credentials: -u should be used for username (even if I use --user) and -p should be for password (even if I use --password). Why do you pass "txtBoxDBName.Text" as password?!
• Maybe your destination path is invalid: it contains spaces, if you use spaces you should use quotes.
• What does txtBoxDBName.Text (?password?) contains? Spaces too? If yes it doesn't work.
• Last presence of + @"" is completely useless, it doesn't insert any quotes.

A correct version of your code with quotes corrected is: path = @"""D:\MySQL\MySQL Server 5.5\bin\mysqldump.exe"" -u " + txtBoxDBUsername.Text + @" -p " + txtBoxDBName.Text + @" > ""D:\C#\Client\Salesmate - EMC\SalesMate\Backup\" + maskeTxtBoxDBFile.Text + @"""";

For more readability: path = $@"""D:\MySQL\MySQL Server 5.5\bin\mysqldump.exe"" -u {txtBoxDBUsername.Text} -p {txtBoxDBName.Text} > ""D:\C#\Client\Salesmate - EMC\SalesMate\Backup{maskeTxtBoxDBFile.Text}""";

Answer 6

ProcessStartInfo psi = new ProcessStartInfo();
psi.FileName = @"C:\\xampp\mysql\bin\mysql.exe";
psi.RedirectStandardInput = true;
psi.RedirectStandardOutput = false;
psi.CreateNoWindow = true;
psi.Arguments = string.Format(@"-u{0} -p{1} -h{2} {3}<{4}", "root", "password", "localhost", "your_dbname", "your_.sql_file");
psi.UseShellExecute = false;
Process process = Process.Start(psi);
process.StandardInput.WriteLine(input);
process.StandardInput.Close();
process.WaitForExit();
process.Close();

This one worked for me you can try it out as long as you've your backed up .sql file