MySQL Connector/Net |
MySqlDataAdapter..::..DeleteCommand Property |
MySqlDataAdapter Class Example See Also Send Feedback |
Gets or sets a SQL statement or stored procedure used to delete records from the data set.
Namespace: MySql.Data.MySqlClient
Assembly: MySql.Data (in MySql.Data.dll) Version: 6.8.4.0
Syntax
C# |
---|
public MySqlCommand DeleteCommand { get; set; } |
Visual Basic |
---|
Public Property DeleteCommand As MySqlCommand Get Set |
Visual C++ |
---|
public: property MySqlCommand^ DeleteCommand { MySqlCommand^ get (); void set (MySqlCommand^ value); } |
Field Value
A MySqlCommand used during Update(DataSet) to delete records in the database that correspond to deleted rows in the DataSet.Remarks
During Update(DataSet), if this property is not set and primary key information is present in the DataSet, the DeleteCommand can be generated automatically if you set the SelectCommand property and use the MySqlCommandBuilder. Then, any additional commands that you do not set are generated by the MySqlCommandBuilder. This generation logic requires key column information to be present in the DataSet.
When DeleteCommand is assigned to a previously created MySqlCommand, the MySqlCommand is not cloned. The DeleteCommand maintains a reference to the previously created MySqlCommand object.
Examples
The following example creates a MySqlDataAdapter and sets the
SelectCommand and DeleteCommand properties. It assumes you have already
created a MySqlConnection object.
Visual Basic | Copy |
---|---|
Public Shared Function CreateCustomerAdapter(conn As MySqlConnection) As MySqlDataAdapter Dim da As MySqlDataAdapter = New MySqlDataAdapter() Dim cmd As MySqlCommand Dim parm As MySqlParameter ' Create the SelectCommand. cmd = New MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn) cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15) cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15) da.SelectCommand = cmd ' Create the DeleteCommand. cmd = New MySqlCommand("DELETE FROM mytable WHERE id=@id", conn) parm = cmd.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id") parm.SourceVersion = DataRowVersion.Original da.DeleteCommand = cmd Return da End Function |
C# | Copy |
---|---|
public static MySqlDataAdapter CreateCustomerAdapter(MySqlConnection conn) { MySqlDataAdapter da = new MySqlDataAdapter(); MySqlCommand cmd; MySqlParameter parm; // Create the SelectCommand. cmd = new MySqlCommand("SELECT * FROM mytable WHERE id=@id AND name=@name", conn); cmd.Parameters.Add("@id", MySqlDbType.VarChar, 15); cmd.Parameters.Add("@name", MySqlDbType.VarChar, 15); da.SelectCommand = cmd; // Create the DeleteCommand. cmd = new MySqlCommand("DELETE FROM mytable WHERE id=@id", conn); parm = cmd.Parameters.Add("@id", MySqlDbType.VarChar, 5, "id"); parm.SourceVersion = DataRowVersion.Original; da.DeleteCommand = cmd; return da; } |