SqlCeCommandBuilder.GetUpdateCommand Method

Gets the automatically generated SqlCeCommand object required to perform updates on the database when an application calls Update on the SqlCeDataAdapter.

Namespace:  System.Data.SqlServerCe
Assembly:  System.Data.SqlServerCe (in System.Data.SqlServerCe.dll)

public SqlCeCommand GetUpdateCommand()

Return Value

Type: System.Data.SqlServerCe.SqlCeCommand
The automatically generated SqlCeCommand object required to perform updates.

An application can use the GetUpdateCommand method for informational or troubleshooting purposes because it returns the SqlCeCommand object to be executed.

You can also use GetUpdateCommand as the basis of a modified command. For example, you might call GetUpdateCommand, modify one of its properties, and then explicitly set that on the SqlCeDataAdapter.

After the SQL statement is first generated, the application must explicitly call RefreshSchema() if the application changes the SQL statement in any way. Otherwise, the GetUpdateCommand still uses information from the previous statement, and that information might not be correct. The SQL statements are first generated when the application calls either Update or GetUpdateCommand.

The following example shows calling the GetUpdateCommand method of the SqlCeCommandBuilder.

try
{
    SqlCeConnection conn = new SqlCeConnection("Data Source = MyDatabase.sdf");
    conn.Open();

    SqlCeCommand cmd = conn.CreateCommand();
    cmd.CommandText = "SELECT * FROM employees";

    SqlCeDataAdapter adp = new SqlCeDataAdapter(cmd);

    SqlCeCommandBuilder cb = new SqlCeCommandBuilder();
    cb.DataAdapter = adp;

    MessageBox.Show(cb.GetUpdateCommand().CommandText);
    MessageBox.Show(cb.GetInsertCommand().CommandText);
    MessageBox.Show(cb.GetDeleteCommand().CommandText);

    DataSet ds = new DataSet("test");
    adp.Fill(ds);

    // Modify the contents of the DataSet
    //
    ds.Tables[0].Rows[0]["First Name"] = "Joe";

    adp.Update(ds);

}
catch (Exception e1)
{
    Console.WriteLine(e1.ToString());
}


Show: