c# - ExecuteNonQuery：连接属性尚未初始化。sql参数数组

Question

我需要帮助..请告诉我我在这段代码中做错了什么，我在将参数数组传递给命令时搞砸了。我的存储过程是正确的，连接字符串也是正确的..

  internal string addmember(string name, string dob, string city, string state, string mobile, string email, string pass)
    {
        List<SqlParameter> param = new List<SqlParameter>();
        param.Add(new SqlParameter("@Mname",Convert.ToString(name)));
        param.Add(new SqlParameter("@Mdob",Convert.ToString(dob)));
        param.Add(new SqlParameter("@MemailId",Convert.ToString(email)));
        param.Add(new SqlParameter("@Mpassword", Convert.ToString(email)));
        param.Add(new SqlParameter("@McontactNo", Convert.ToString(mobile)));
        param.Add(new SqlParameter("@Mcity", Convert.ToString(city)));
        param.Add(new SqlParameter("@Mstate", Convert.ToString(state)));

        string result = Convert.ToString(executescaler(con, CommandType.StoredProcedure, "add_members", param.ToArray()));
            return result;
    }

    private string executescaler(string con, CommandType commandTyp, string procedure, SqlParameter[] sqlParameter)
    {
        string res;
        using (SqlConnection connection = new SqlConnection(con))
        {

            connection.Open();
            SqlCommand cmd = new SqlCommand(procedure, connection);
            cmd.CommandType = commandTyp;
            cmd.CommandText = procedure;
            cmd.Parameters.AddRange(sqlParameter);
            res=  cmd.ExecuteNonQuery().ToString();
        }
        return res;
    }

通常我使用 sqlhelper，所以永远不需要经过深思熟虑.. 但现在我正因为这个而痛苦..我不知道如何将 sqlparameter 数组传递给命令

Answer 1

您没有告诉您SqlCommand它应该与您的SqlConnetion. 此外，SqlCommand实现IDisposable接口，因此您应该在using语句中使用它：

private string executescaler(string con, CommandType commandTyp, string procedure, SqlParameter[] sqlParameter)
{
    string res;
    using (var connection = new SqlConnection(con))
    {
        using(var cmd = new SqlCommand(procedure, con))
        {
            cmd.CommandType = commandTyp;
            cmd.Parameters.AddRange(sqlParameter);
            connection.Open();
            res = cmd.ExecuteNonQuery().ToString();
        }
    }
    return res;
}