MySqlDataAdapter Class

MySQL Connector/Net

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C# Visual Basic
Visual C++

MySQL Connector/Net

MySqlDataAdapter Class

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Represents a set of data commands and a database connection that are used to fill a dataset and update a MySQL 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 MySqlDataAdapter : DbDataAdapter, IDbDataAdapter, IDataAdapter, ICloneable

Visual Basic (Declaration)
Public NotInheritable Class MySqlDataAdapter _ Inherits DbDataAdapter _ Implements IDbDataAdapter, IDataAdapter, ICloneable

Visual C++
public ref class MySqlDataAdapter sealed : public DbDataAdapter, IDbDataAdapter, IDataAdapter, ICloneable

Remarks

The MySQLDataAdapter, serves as a bridge between a DataSet and MySQL for retrieving and saving data. The MySQLDataAdapter provides this bridge by mapping Fill(DataSet), which changes the data in the DataSet to match the data in the data source, and Update(DataSet), which changes the data in the data source to match the data in the DataSet, using the appropriate SQL statements against the data source.

When the MySQLDataAdapter fills a DataSet, it will create the necessary tables and columns for the returned data if they do not already exist. However, primary key information will not be included in the implicitly created schema unless the MissingSchemaAction property is set to AddWithKey. You may also have the MySQLDataAdapter create the schema of the DataSet, including primary key information, before filling it with data using FillSchema(DataTable, SchemaType).

MySQLDataAdapter is used in conjunction with MySqlConnection and MySqlCommand to increase performance when connecting to a MySQL database.

The MySQLDataAdapter also includes the SelectCommand, InsertCommand, DeleteCommand, UpdateCommand, and TableMappings properties to facilitate the loading and updating of data.

When an instance of MySQLDataAdapter is created, the read/write properties are set to initial values. For a list of these values, see the MySQLDataAdapter constructor.

Note: Please be aware that the DataColumn class allows only Int16, Int32, and Int64 to have the AutoIncrement property set. If you plan to use autoincremement columns with MySQL, you should consider using signed integer columns.

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

Public Function SelectRows(dataSet As DataSet, connection As String, query As String) As DataSet
Dim conn As New MySqlConnection(connection)
Dim adapter As New MySqlDataAdapter()
adapter.SelectCommand = new MySqlCommand(query, conn)
adapter.Fill(dataset)
Return dataset
End Function

CopyC#

public DataSet SelectRows(DataSet dataset,string connection,string query)
{
MySqlConnection conn = new MySqlConnection(connection);
MySqlDataAdapter adapter = new MySqlDataAdapter();
adapter.SelectCommand = new MySqlCommand(query, conn);
adapter.Fill(dataset);
return dataset;
}

Inheritance Hierarchy

System..::.Object
  System..::.MarshalByRefObject
    System.ComponentModel..::.Component
      System.Data.Common..::.DataAdapter
        System.Data.Common..::.DbDataAdapter
          MySql.Data.MySqlClient..::.MySqlDataAdapter