MySqlDataAdapter Constructor (String, MySqlConnection)

MySQL Connector/Net

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C# Visual Basic
Visual C++

MySQL Connector/Net

MySqlDataAdapter Constructor (String, MySqlConnection)

MySqlDataAdapter Class Example See Also Send Feedback

Initializes a new instance of the MySqlDataAdapter class with a SelectCommand and a MySqlConnection object.

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

Syntax

C#
public MySqlDataAdapter( string selectCommandText, MySqlConnection connection )

Visual Basic (Declaration)
Public Sub New ( _ selectCommandText As String, _ connection As MySqlConnection _ )

Visual C++
public: MySqlDataAdapter( String^ selectCommandText, MySqlConnection^ connection )

Parameters

selectCommandText: Type: System..::.String
A String that is a SQL SELECT statement or stored procedure to be used by the SelectCommand property of the MySqlDataAdapter.

connection: Type: MySql.Data.MySqlClient..::.MySqlConnection
A MySqlConnection that represents the connection.

Remarks

This implementation of the MySqlDataAdapter opens and closes a MySqlConnection if it is not already open. This can be useful in a an application that must call the Fill(DataSet) method for two or more MySqlDataAdapter objects. If the MySqlConnection is already open, you must explicitly call Close()()() or Dispose(Boolean) to close it.

When an instance of MySqlDataAdapter is created, the following read/write properties are set to the following initial values.

Properties	Initial Value
MissingMappingAction	MissingMappingAction.Passthrough
MissingSchemaAction	MissingSchemaAction.Add

You can change the value of any of these properties through a separate call to the property.

Examples

The following example creates a MySqlDataAdapter and sets some of its properties.

CopyVB.NET

Public Sub CreateSqlDataAdapter()
Dim conn As MySqlConnection = New MySqlConnection("Data Source=localhost;" & _
"database=test")
Dim da As MySqlDataAdapter = New MySqlDataAdapter("SELECT id, name FROM mytable", conn)
da.MissingSchemaAction = MissingSchemaAction.AddWithKey

da.InsertCommand = New MySqlCommand("INSERT INTO mytable (id, name) " & _
"VALUES (@id, @name)", conn)
da.UpdateCommand = New MySqlCommand("UPDATE mytable SET id=@id, name=@name " & _
"WHERE id=@oldId", conn)
da.DeleteCommand = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn)

da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")

da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id")
da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name")
da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original

da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original
End Sub

CopyC#

public static void CreateSqlDataAdapter()
{
MySqlConnection conn = new MySqlConnection("Data Source=localhost;database=test");
MySqlDataAdapter da = new MySqlDataAdapter("SELECT id, name FROM mytable", conn);
da.MissingSchemaAction = MissingSchemaAction.AddWithKey;

da.InsertCommand = new MySqlCommand("INSERT INTO mytable (id, name) " +
"VALUES (@id, @name)", conn);
da.UpdateCommand = new MySqlCommand("UPDATE mytable SET id=@id, name=@name " +
"WHERE id=@oldId", conn);
da.DeleteCommand = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn);

da.InsertCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
da.InsertCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");

da.UpdateCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id");
da.UpdateCommand.Parameters.Add("@name", MySqlDbType.VarChar, 40, "name");
da.UpdateCommand.Parameters.Add("@oldId", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;

da.DeleteCommand.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id").SourceVersion = DataRowVersion.Original;
}