ASP.NET中存储过程的简单使用

1.存储过程的创建

--创建一个存储过程来获取一个邮件的发件人,收件人和日期
create proc proc_ShowDetails
(@id varchar(256),@sender nvarchar(256) output,@receiver nvarchar(256) output,@date datetime output)
as

begin transaction tran_Detail

select @sender=m_senderEmail,@date=m_date from tab_mail where m_ID=@id

select @receiver=r_receiverEmail from tab_receiver where rm_ID=@id

commit transaction tran_Detail

2.方法
/// <summary>
/// 获得邮件的发件人，收件人，主题，好友名字的方法
/// </summary>
/// <param name="id">邮件的id</param>
protected void getDetails(string id)
{
using (SqlConnection conn = new SqlConnection("server=.;database=GMail;uid=sa;pwd=111"))
{
using (SqlCommand cmd = new SqlCommand("proc_xyzShowDetails", conn))
{
conn.Open();
cmd.CommandType = CommandType.StoredProcedure;

cmd.Parameters.Add("@id", SqlDbType.VarChar, 256);
cmd.Parameters.Add("@sender", SqlDbType.NVarChar, 256);
cmd.Parameters.Add("@receiver", SqlDbType.NVarChar, 256);
cmd.Parameters.Add("@date", SqlDbType.DateTime);
cmd.Parameters.Add("@friendName", SqlDbType.NVarChar, 30);

cmd.Parameters["@id"].Value = id;
cmd.Parameters["@sender"].Direction = ParameterDirection.Output;
cmd.Parameters["@receiver"].Direction = ParameterDirection.Output;
cmd.Parameters["@date"].Direction = ParameterDirection.Output;
cmd.Parameters["@friendName"].Direction = ParameterDirection.Output;

cmd.ExecuteNonQuery();

string friend = cmd.Parameters["@friendName"].Value.ToString();
string friendName;
if (friend == null || friend == string.Empty)
{
friendName = cmd.Parameters["@sender"].Value.ToString();
}
else
{
friendName = " < " + friend + " > .Value.ToString]" + cmd.Parameters["@sender"].Value.ToString();
}

this.lb_sender.Text = friendName;
this.lb_receiver.Text = cmd.Parameters["@receiver"].Value.ToString();
this.lb_date.Text = cmd.Parameters["@date"].Value.ToString();

}
}

}