c# - Oledb 和视觉 foxpro

Question

如何在 c#（使用 oledb）中为 visual fox pro(.dbf) 创建表时为字段设置索引。我想为一个表创建多个索引，其中一些索引是（field1+field2）之类的表达式。

Answer 1

这是一个例子：

using(var connection = new OleDbConnection(@"provider=vfpoledb;data source=c:\")) {
    using(var command = connection.CreateCommand()) {
        connection.Open();
        command.CommandText = "CREATE TABLE Table1(Column1 v(10), Column2 v(10))";
        command.ExecuteNonQuery();
        command.CommandText = "EXECSCRIPT([USE Table1 IN SELECT(0) EXCLUSIVE])";        
        command.ExecuteNonQuery();
        command.CommandText = "EXECSCRIPT([INDEX ON Column1 TAG Tag1])";
        command.ExecuteNonQuery();
        command.CommandText = "EXECSCRIPT([INDEX ON Column1 + Column2 TAG Tag2])";
        command.ExecuteNonQuery();          
        connection.Close();
    }
}