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" Although the file is already existed and resulted to that exception.

Here is my code regarding my problem

using System.Diagnostics;

private void btnProceed_Click(object sender, EventArgs e)
{
            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 + @"";
            Process p = new Process();
            p.StartInfo.FileName = path;
            p.Start();
}

mjb · Accepted Answer · 2019-04-30 06:38:49Z

41

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.

edited Apr 30, 2019 at 6:38

answered Sep 7, 2012 at 4:21

mjb

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11 Comments

Andrew Barber Over a year ago

Thanks for posting your answer! Please be sure to read the FAQ on Self-Promotion carefully. Also note that it is required that you post a disclaimer every time you link to your own site/product.

Andrew Barber Over a year ago

By disclaimer, I mean about the fact that you are posting about your own product/website; what you added at the bottom in the 'Update'.

Oghenero E. Over a year ago

how can it be made to backup at regular intervals, say once everyday

A X Over a year ago

Can you make a version of this library that doesn't use the Oracle GPL client? As a result your library is also GPL!

mjb Over a year ago

@Abr I will try to have a look on this

|

hagensoft · Accepted Answer · 2012-09-07 04:23:38Z

0

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/

answered Sep 7, 2012 at 4:23

hagensoft

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Comments

tedebus · Accepted Answer · 2018-06-07 08:28:48Z

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}""";

piertoni · Accepted Answer · 2021-03-30 06:08:03Z

0

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}", "root", "password", "localhost", "your_dbname");
psi.UseShellExecute = false;
Process process = Process.Start(psi);
process.StandardInput.Write(File.ReadAllText(inputFilePath));
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

edited Mar 30, 2021 at 6:08

piertoni

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answered Jun 8, 2018 at 8:02

Mwenda Sam

1

1 Comment

sohail naseer Over a year ago

What is in output when take back up

Hille · Accepted Answer · 2023-05-08 10:44:46Z

0

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();
    }
    catch(MySqlException ex)
    {
        msgErr(ex.Message + " connection error.");
        return;
    }

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

edited May 8, 2023 at 10:44

Hille

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answered Jun 23, 2017 at 6:25

Ramgy Borja

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