[SQL]存储过程

C#调用存储过程并使用output和returnvalue值---总结1.   MSSQL 存储过程有 input,output,returnvalue 等类型参数。

              其中input和output参数必须声明，returnvalue不需要在SQL语句声明

        2.  Asp.net  页面中调用 存储过程，指定commadType=stroedProucedure;

             指定参数  

           例子;  SqlParameter parm=new SqlParameter();
                    parm.ParameterName="@name";
                    parm.SqlDbType=SqlDbType.VarChar;
                    parm.Direction=ParameterDirection.Input;         //output,returnvalue等
                    parm.Value=nameValue;



          获取存储过程返回的数据集和 output，returnvalue值

                        DataSet ds=new DataSet();
                        da.Fill(ds);
                        Identity = cmd.Parameters["@Identity"].Value.ToString();
                        RowCount = cmd.Parameters["@ROWCOUNT"].Value.ToString(); 

                        return ds;

       

1.创建  带input 参数的 简单存储过程

创建存储过程  CREATE PROCEDURE--//存储过程
USE mydata
Go
CREATE PROCEDURE  [wowo]
AS
SELECT * FROM [wowomiao]
go 

修改存储过程，执行存储过程ALTER PROCEDURE [wowo]  @name varchar(100)      --声明变量
AS
DECLARE @sql varchar(200)
SET @sql='select * from [wowomiao]'  --区分大小写sql SQL
if @name!=''                                 --if begin .. end
begin
SET @sql=@sql+'WHERE name like ''%'+@name+'%'''   --变量拼接++，'单引号，特殊字符用单引号

END
exec(@sql)          --exec(@sql) 
print @sql
go

exec [wowo] @name='2'                         --执行存储过程

 

2.创建 input，output,returnvalue   参数的 简单存储过程

ALTER PROCEDURE [wowo]  @name varchar(100) ,@Identity int OUTPUT        
AS
DECLARE @sql varchar(200)
SET @sql='select * from [wo]'  --区分大小写sql SQL
if @name!=''
begin
SET @sql=@sql+'WHERE name like ''%'+@name+'%'''   --变量拼接++，'单引号，特殊字符用单引号

END
exec(@sql)          --exec(@sql) 
print @sql
SET @Identity =SCOPE_IDENTITY()
print @Identity
print @@ROWCOUNT
RETURN @@ROWCOUNT

go

exec [wowo] @name='',@identity=0

(Gridview数据绑定)protected void Page_Load(object sender, EventArgs e)
        {
            if (Request.Cookies["name"] == null || Request.Cookies["name"].Value == "")
            {
                Response.Redirect("Login.aspx?returnUrl="+Request.Url);


            }

            else
            {
                //if (!IsPostBack)
                //{
                    //DataSet ds = sql.getdataset("select * from wowotuan_miaosha");
                string Identity=null;   
                string rowcount=null;
                DataSet ds = sql.DataSetProcedure("wowo", "2",ref Identity,ref rowcount);
                lbTest.Text = "Identity="+Identity+"<br/>rowcount="+rowcount;

                    GridView1.DataSource = ds.Tables[0].DefaultView;
                    GridView1.DataBind();
                //}
            } 

using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.ComponentModel;
using System.Data.SqlClient;
using System.Data;
namespace _55tuan
{
    public class sql
    {
        private static string connection = "server=(local);Database =mydata;Integrated Security=true;";

        public static DataSet getdataset(string commd)
        {
            using (SqlConnection con = new SqlConnection(connection))
            {
                con.Open();
                
                SqlCommand cmd = new SqlCommand(commd, con);
                SqlDataAdapter da = new SqlDataAdapter(cmd);
                DataSet ds = new DataSet();
                da.Fill(ds);
                return ds;
               
            }
        }



        /// <summary>
        /// C# 类方法获取存储过程返回的数据和返回值
        /// </summary>
        /// <param name="ProucedureName">存储过程名称</param>
        /// <param name="nameValue">参数name</param>
        /// <param name="Identity">output参数identity</param>
        /// <param name="RowCount">returnvalue参数rowcount</param>
        /// <returns></returns>
        public static DataSet DataSetProcedure(string ProucedureName, string nameValue, ref string Identity,ref string RowCount)
        {
            using (SqlConnection con=new SqlConnection(connection))
            {
                using(SqlCommand cmd=new SqlCommand())
                {
                    cmd.CommandType=CommandType.StoredProcedure;
                    cmd.CommandText=ProucedureName;
                    cmd.Connection=con;
                    SqlParameter parm=new SqlParameter();
                    parm.ParameterName="@name";
                    parm.SqlDbType=SqlDbType.VarChar;
                    parm.Direction=ParameterDirection.Input;
                    parm.Value=nameValue;

                    

                  

                   //声明output参数 Identity
                   SqlParameter parm1=new SqlParameter();
                   parm1.ParameterName = "@Identity";
                   parm1.Direction = ParameterDirection.Output;
                   parm1.SqlDbType = SqlDbType.VarChar;
                   parm1.Value = "";

                   //声明returnvalue参数 ROWCOUNT                                        SqlParameter parm2 = new SqlParameter();
                   parm2.ParameterName = "@ROWCOUNT";
                   parm2.Direction = ParameterDirection.ReturnValue;
                   parm2.SqlDbType = SqlDbType.VarChar;
                   parm2.Value = "";


                   cmd.Parameters.Add(parm);
                   cmd.Parameters.Add(parm1);
                   cmd.Parameters.Add(parm2);
                    con.Open();

                    using(SqlDataAdapter da=new SqlDataAdapter(cmd))
                    {
                        //Identity =cmd.Parameters["@Identity"].Value.ToString();
                        //RowCount = cmd.Parameters["@ROWCOUNT"].Value.ToString();
                        DataSet ds=new DataSet();
                        da.Fill(ds);
                        Identity = cmd.Parameters["@Identity"].Value.ToString();  //获取output参数
                        RowCount = cmd.Parameters["@ROWCOUNT"].Value.ToString();  //获取returnvalue参数 

                        return ds;

                    }


                }

            }

        }
        

        public static int ExecuteNonQuery(string commd)
        {
            using (SqlConnection con = new SqlConnection(connection))
            {
                con.Open();

                SqlCommand cmd = new SqlCommand(commd, con);
                 return  cmd.ExecuteNonQuery();
               

            }
        }

        



    }
}