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IDbCommand.ExecuteNonQuery Method

Executes an SQL statement against the Connection object of a .NET Framework data provider, and returns the number of rows affected.

Namespace: System.Data
Assembly: System.Data (in system.data.dll)

int ExecuteNonQuery ()
int ExecuteNonQuery ()
function ExecuteNonQuery () : int
Not applicable.

Return Value

The number of rows affected.
Exception typeCondition

InvalidOperationException

The connection does not exist.

-or-

The connection is not open.

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.

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();
    }
}

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0
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