Question

我有一个在ASP.NET和C＃中开发的页面。在此特定页面上，登录用户可以查看他们的经理是谁以及经理联系人详细信息等。正在从数据库中检索详细信息。我使用以下代码

protected string ManagerData()
{
    string UsrName = User.Identity.Name;
    string mName;
    string mNum;
    using (SqlConnection connection = new SqlConnection(Common.ConnectionString))
    {
        using (SqlCommand cmd = new SqlCommand("select ManagerName,ManagerNumber from Managers where UserName=@UserName"))
        {
            SqlParameter para = new SqlParameter("UserName", UsrName);
            cmd.Parameters.Add(para);
            cmd.Connection = connection;
            connection.Open();
            using (SqlDataReader reader = cmd.ExecuteReader())
            {
                reader.Read();
                mName = reader.GetString(0);
                mNum = reader.GetString(1);
            }
        }
    }
    return //How would i return both of the string
}

返回值。要显示它们，我使用以下代码

<h5>Your Manager is:<%:ManagerData() %> </h5>

但如果我这样做

<h5>Your Managers Number is:<%:ManagerData() %> </h5>

在两种情况下都返回Manager的名称。所以我的问题是我应该编写一个单独的方法来获取管理器编号，还是有办法从上面的方法中返回两个字符串？

提前感谢您的所有帮助和支持

Answer 1

将参数传递给 ManagerData 功能，无论您需要名称还是数字。

protected string ManagerData(String sValue)
{
    string UsrName = User.Identity.Name;
    string mName;
    string mNum;
    using (SqlConnection connection = new SqlConnection(Common.ConnectionString))
    {
        using (SqlCommand cmd = new SqlCommand("select ManagerName,ManagerNumber from Managers where UserName=@UserName"))
        {
            SqlParameter para = new SqlParameter("UserName", UsrName);
            cmd.Parameters.Add(para);
            cmd.Connection = connection;
            connection.Open();
            using (SqlDataReader reader = cmd.ExecuteReader())
            {
                reader.Read();
                mName = reader.GetString(0);
                mNum = reader.GetString(1);
            }
        }
    }

    if(sValue = "name")
     return mName;
    else
     return mNum    
}

<h5>Your Manager is:<%:ManagerData("name") %> </h5>

<h5>Your Managers Number is:<%:ManagerData("number") %> </h5>

Answer 2

返回多个值

您可以使用＆＃34; out＆＃34;获取多个值的参数。例如。

   Public string mName;
   Public string mNum;
        protected void ManagerData(out string mName,out string mNum)
    {
        string UsrName = User.Identity.Name;
        string mName;
        string mNum;
        using (SqlConnection connection = new SqlConnection(Common.ConnectionString))
        {
            using (SqlCommand cmd = new SqlCommand("select ManagerName,ManagerNumber from Managers where UserName=@UserName"))
            {
                SqlParameter para = new SqlParameter("UserName", UsrName);
                cmd.Parameters.Add(para);
                cmd.Connection = connection;
                connection.Open();
                using (SqlDataReader reader = cmd.ExecuteReader())
                {
                    reader.Read();
                    mName = reader.GetString(0);
                    mNum = reader.GetString(1);
                }
            }
        }

    }

在源页面

  <h5>Your Manager is:<%= mName %></h5>
     <h5>Your Manager is:<%= mNum %></h5>

执行此函数后，您可以拥有mName和mNum的值。

如何从DB为ASP.NET页面分配多个值

2 个答案:

返回多个值