本人小白,不知道哪位大佬解答一下
1.代码如下:
class Utils
{
public static void Updatedata(string sql)
{
SqlConnection con = new SqlConnection("Data Source=.; Initial Catalog=IDE;User=sa;password=R161230");
con.ConnectionString = ConfigurationManager.ConnectionStrings["Initial Catalog"].ToString();
con.Open();
SqlCommand com = new SqlCommand();
com.Connection = con;
com.CommandType = CommandType.Text;
com.CommandText = sql;
SqlDataReader dr = com.ExecuteReader();//执行SQL语句
dr.Close();
con.Close();
}
问题出现在这里:
con.ConnectionString = ConfigurationManager.ConnectionStrings["Initial Catalog"].ToString();
最终这句话返回的数值为null
我虽然知道了问题的点,但是怎么修改呢???