我想问下在C#winform中下面的那段代码用于什么时候,什么意思
if (File.Exists(dbPath))//
{
string sq = @"Data Source=" + dbPath;
m = new SQLiteConnection(sq);
m.Open();
string sql = "select * from sqlite_master where type='table' and name ='因素'";
SQLiteCommand command = new SQLiteCommand(sql, m);//
if (command.ExecuteScalar() == null)//
{
m.Close();
NewTable1(dbPath, "因素");
AddcailiaoPara1(dbPath, "因素");
}
else
{
m.Close();
AddcailiaoPara1(dbPath, "因素");
}