闭眼能写的SqlHelper类
class SqlHelper
{
public static readonly string connstr = ConfigurationManager.ConnectionStrings["dbconnstr"].ConnectionString;
public static int ExecuteNonQuery(string cmdText, params SqlParameter[] parameters)
{
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = cmdText;
cmd.Parameters.AddRange(parameters);
return cmd.ExecuteNonQuery();
}
}
}
{
public static readonly string connstr = ConfigurationManager.ConnectionStrings["dbconnstr"].ConnectionString;
public static int ExecuteNonQuery(string cmdText, params SqlParameter[] parameters)
{
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = cmdText;
cmd.Parameters.AddRange(parameters);
return cmd.ExecuteNonQuery();
}
}
}
public static object ExecuteScalar(string cmdText, params SqlParameter[] parameters)
{
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = cmdText;
cmd.Parameters.AddRange(parameters);
return cmd.ExecuteScalar();
}
}
}
public static DataTable ExecuteDataTable(string cmdText, params SqlParameter[] parameters)
{
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = cmdText;
cmd.Parameters.AddRange(parameters);
using (SqlDataAdapter adapter = new SqlDataAdapter(cmd))
{
DataTable dt = new DataTable();
adapter.Fill(dt);
return dt;
}
}
}
}
public static SqlDataReader ExecuteDataReader(string cmdText, params SqlParameter[] parameters)
{
SqlConnection conn = new SqlConnection(connstr);
conn.Open();
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = cmdText;
cmd.Parameters.AddRange(parameters);
return cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
}
public static int ExecuteStoredProcedure(string procName,params SqlParameter[] parameters)
{
SqlConnection conn = new SqlConnection(connstr);
conn.Open();
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = procName;
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddRange(parameters);
return cmd.ExecuteNonQuery();
}
}
}