IDbCommand.ExecuteNonQuery Method
Definition
Important
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Executes an SQL statement against the Connection object of a .NET data provider, and returns the number of rows affected.
public:
int ExecuteNonQuery();public int ExecuteNonQuery ();abstract member ExecuteNonQuery : unit -> intPublic Function ExecuteNonQuery () As IntegerReturns
The number of rows affected.
Exceptions
Examples
The following example creates an instance of the derived class, OleDbCommand, and then executes it. To accomplish this, the method is passed a string that is a SQL SELECT statement and a string to use to connect to the data source.
static private void CreateOleDbCommand(
string queryString, string connectionString)
{
using (OleDbConnection connection = new
OleDbConnection(connectionString))
{
connection.Open();
OleDbCommand command = new
OleDbCommand(queryString, connection);
command.ExecuteNonQuery();
}
}
Private Sub CreateOleDbCommand( _
ByVal queryString As String, ByVal connectionString As String)
Using connection As New OleDbConnection(connectionString)
connection.Open()
Dim command As New OleDbCommand(queryString, connection)
command.ExecuteNonQuery()
End Using
End Sub
Remarks
You can use the ExecuteNonQuery to perform catalog operations (for example, querying the structure of a database or creating database objects such as tables), or to change the data in a database without using a DataSet by executing UPDATE, INSERT, or DELETE statements.
Although the ExecuteNonQuery does not return any rows, any output parameters or return values mapped to parameters are populated with data.
For UPDATE, INSERT, and DELETE statements, the return value is the number of rows affected by the command. For all other types of statements, the return value is -1.
