MySqlConnection Class

MySQL Connector/Net

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C# Visual Basic
Visual C++

MySQL Connector/Net

MySqlConnection Class

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Represents an open connection to a MySQL Server database. This class cannot be inherited.

Namespace: MySql.Data.MySqlClient
Assembly: MySql.Data (in MySql.Data.dll) Version: 6.2.2.0

Syntax

C#
public sealed class MySqlConnection : DbConnection, ICloneable

Visual Basic (Declaration)
Public NotInheritable Class MySqlConnection _ Inherits DbConnection _ Implements ICloneable

Visual C++
public ref class MySqlConnection sealed : public DbConnection, ICloneable

Remarks

A MySqlConnection object represents a session to a MySQL Server data source. When you create an instance of MySqlConnection, all properties are set to their initial values. For a list of these values, see the MySqlConnection constructor.

If the MySqlConnection goes out of scope, it is not closed. Therefore, you must explicitly close the connection by calling Close()()() or Dispose(Boolean).

Examples

The following example creates a MySqlCommand and a MySqlConnection. The MySqlConnection is opened and set as the Connection for the MySqlCommand. The example then calls ExecuteNonQuery()()(), and closes the connection. To accomplish this, the ExecuteNonQuery is passed a connection string and a query string that is a SQL INSERT statement.

CopyVB.NET

<c>
          Public Sub InsertRow(myConnectionString As String)
          ' If the connection string is null, use a default.
          If myConnectionString = "" Then
          myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass"
          End If
          Dim myConnection As New MySqlConnection(myConnectionString)
          Dim myInsertQuery As String = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)"
          Dim myCommand As New MySqlCommand(myInsertQuery)
          myCommand.Connection = myConnection
          myConnection.Open()
          myCommand.ExecuteNonQuery()
          myCommand.Connection.Close()
          End Sub
        </c>

CopyC#

<c>
          public void InsertRow(string myConnectionString)
          {
          // If the connection string is null, use a default.
          if(myConnectionString == "")
          {
          myConnectionString = "Database=Test;Data Source=localhost;User Id=username;Password=pass";
          }
          MySqlConnection myConnection = new MySqlConnection(myConnectionString);
          string myInsertQuery = "INSERT INTO Orders (id, customerId, amount) Values(1001, 23, 30.66)";
          MySqlCommand myCommand = new MySqlCommand(myInsertQuery);
          myCommand.Connection = myConnection;
          myConnection.Open();
          myCommand.ExecuteNonQuery();
          myCommand.Connection.Close();
          }
        </c>

Inheritance Hierarchy

System..::.Object
  System..::.MarshalByRefObject
    System.ComponentModel..::.Component
      System.Data.Common..::.DbConnection
        MySql.Data.MySqlClient..::.MySqlConnection