Question

请教调用SqlHelper类添加修改数据

Answer 1

SQLHelper：
public static string constr = "data source=.;initial catalog=School;User ID=sa;Password=111111";
public static int ExecuteNoQuery(string sql,params SqlParameter[] parameters)
{
using (SqlConnection conn = new SqlConnection(connStr))
{
conn.Open();
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = sql;