未能找到命名空间,我已添加引用求解怎么改
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace WindowsFormsApplication5
{
class Dao
{
SqlConnection sc;
public SqlConnection connect()
{
string str = @"Data Source = .;Initial Catalog = yangtest;Integrated Security = True";
SqlConnection sc = new SqlConnection(str);
sc.Open();
return sc;
}
public SqlCmmand command(string sql)
{
SqlCommand cmd = new SqlCommand(sql, connect());
return cmd;
}
public int Execute(string sql)
{
return command(sql).ExecutNonQuery();
}
public SqlDataReader read(string sql)
{
return command(sql).ExecuteReader();
}
public void DaoClose()
{
sc.Close();
}
}
}