asp.net调用带有输入和输出参数的存储过程

存储过程检测用户名是否重户

create proc checklogin
@username nchar(20),
@pwd nchar(20),
@hasrow int output
as
select @hasrow=count(*) from users where and
GO

存储过程写入数据

create proc adduser
@username nchar(20),
@pwd nchar(20)
as
begin
insert into users (username,pwd)values(@username,@pwd)
end
GO

aspx页面

CS页面

using System;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
      
        string connstr = "Data Source=.;Database=test;UID=sa;PWD=sa;";
        SqlConnection conn = new SqlConnection(connstr);
        SqlCommand command = new SqlCommand("checkuser",conn);
        command.CommandType = CommandType.StoredProcedure;

        SqlParameter parameter = new SqlParameter("@username", SqlDbType.NChar, 20);
        parameter.Value = this.TextBox1.Text;
        command.Parameters.Add(parameter);

        SqlParameter parameter1 = new SqlParameter("@result",SqlDbType.Int,4);
        parameter1.Direction = ParameterDirection.Output;
        command.Parameters.Add(parameter1);

        conn.Open();
        command.ExecuteNonQuery();
        conn.Close();
        int result =Convert.ToInt32( parameter1.Value);

       
        if (result == 1)
        {
            Response.Write("此用户已经存在");
        }
        else
        {
            //Response.Write("可以注册");
            SqlCommand command1 = new SqlCommand("adduser", conn);
            command1.CommandType = CommandType.StoredProcedure;
            SqlParameter para_username = new SqlParameter("@username", SqlDbType.NChar);
            para_username.Value = this.TextBox1.Text;
            command1.Parameters.Add(para_username);

            SqlParameter para_pwd = new SqlParameter("@pwd", SqlDbType.NChar);
            para_pwd.Value = this.TextBox2.Text;
            command1.Parameters.Add(para_pwd);
            conn.Open();
            command1.ExecuteNonQuery();
            conn.Close();
            Response.Write("添加成功!");
        }

    }
}