C#调用存储过程带输出参数或返回值

CREATE PROCEDURE [dbo].[GetNameById]
 @studentid varchar(8),
 @studentname nvarchar(50) OUTPUT
AS
BEGIN
 SELECT @studentname=studentname FROM student
    WHERE studentid=@studentid
 if @@Error<>0
  RETURN -1
 else
  RETURN 0
END

using (SqlConnection conn = new SqlConnection(connStr))
{
	try
	{
	    SqlCommand cmd = new SqlCommand("GetNameById", conn);
	    cmd.CommandType = CommandType.StoredProcedure;
	    cmd.Parameters.AddWithValue("@studentid", "09888888");　　//给输入参数赋值
	    SqlParameter parOutput =cmd.Parameters.Add("@studentname", SqlDbType.NVarChar, 50);　　//定义输出参数
	    parOutput.Direction = ParameterDirection.Output;　　//参数类型为Output
	    SqlParameter parReturn = new SqlParameter("@return", SqlDbType.Int);
	    parReturn.Direction = ParameterDirection.ReturnValue; 　　//参数类型为ReturnValue
	    cmd.Parameters.Add(parReturn);
	    conn.Open();
	    cmd.ExecuteNonQuery();
	    MessageBox.Show(parOutput.Value.ToString());   //显示输出参数的值
	    MessageBox.Show(parReturn.Value.ToString());　　//显示返回值
	}
	catch (System.Exception ex)
	{
	    MessageBox.Show(ex.Message);
	}
}

Create PROCEDURE AddOrderTran
	@country nvarchar(100),
	@adds nvarchar(100),
	@ynames nvarchar(100),
	@pids nvarchar(100),
	@cellp nvarchar(100),
	@cphone nvarchar(100),
	@amounts nvarchar(100),
	@cartnumber nvarchar(100)
as
    Declare @id int
	BEGIN TRANSACTION
		insert into Orders(Order_Country,Order_Adress,Order_UserName,Order_PostID,Cells,Order_Phone,Total_pay,CartNumber,IsPay)
			values (@country,@adds,@ynames,@pids,@cellp,@cphone,@amounts,@cartnumber,'0')
		Select @id=@@identity
		insert into Orders_Item (OrderNumber,ProductsID,Products_Color,Products_Price,Order_Qty,Item_Total)
			select  @id,Carts_Item.ProductsID,Carts_Item.Products_Color,Carts_Item.Products_Price,Carts_Item.Item_Qty,Carts_Item.Total_Pay
			from Carts_Item where Carts_Item.CartNumber=@cartnumber
		delete Carts_Item where CartNumber=@cartnumber
		IF @@error <> 0  --发生错误
		BEGIN
		    ROLLBACK TRANSACTION
		    RETURN 0
		END
		ELSE
		BEGIN
		    COMMIT TRANSACTION
		    RETURN @id    --执行成功
	END

        #region 执行存储过程

        SqlParameter[] param = new SqlParameter[]
          {
              new SqlParameter("@country",country),
              new SqlParameter("@adds",adds),
              new SqlParameter("@ynames",ynames),
              new SqlParameter("@pids", pids),
              new SqlParameter("@cellp",cellp),
              new SqlParameter("@cphone", cphone),
              new SqlParameter("@amounts",amounts),
              new SqlParameter("@cartnumber",cartnumber),
              new SqlParameter("@return",SqlDbType.Int)
          };
        param[8].Direction = ParameterDirection.ReturnValue;
        MSCL.SqlHelper.RunProcedure("AddOrderTran", param);
        object obj = param[8].Value; //接受返回值

        //string connStr = System.Configuration.ConfigurationManager.AppSettings["ConStr"].ToString();
        //using (SqlConnection conn = new SqlConnection(connStr))
        //{
        //    conn.Open();
        //    SqlCommand cmd = new SqlCommand("AddOrderTran", conn);
        //    cmd.CommandType = CommandType.StoredProcedure;

        //    SqlParameter para1 = new SqlParameter("@country", country);
        //    para1.Direction = ParameterDirection.Input;  //参数方向 为输入参数
        //    cmd.Parameters.Add(para1);

        //    SqlParameter para2 = new SqlParameter("@adds", adds);
        //    para2.Direction = ParameterDirection.Input;
        //    cmd.Parameters.Add(para2);

        //    SqlParameter para3 = new SqlParameter("@ynames", ynames);
        //    para3.Direction = ParameterDirection.Input;
        //    cmd.Parameters.Add(para3);

        //    SqlParameter para4 = new SqlParameter("@pids", pids);
        //    para4.Direction = ParameterDirection.Input;
        //    cmd.Parameters.Add(para4);

        //    SqlParameter para5 = new SqlParameter("@cellp", cellp);
        //    para5.Direction = ParameterDirection.Input;
        //    cmd.Parameters.Add(para5);

        //    SqlParameter para6 = new SqlParameter("@cphone", cphone);
        //    para6.Direction = ParameterDirection.Input;
        //    cmd.Parameters.Add(para6);

        //    SqlParameter para7 = new SqlParameter("@amounts", amounts);
        //    para7.Direction = ParameterDirection.Input;
        //    cmd.Parameters.Add(para7);

        //    SqlParameter para8 = new SqlParameter("@cartnumber", cartnumber);
        //    para8.Direction = ParameterDirection.Input;
        //    cmd.Parameters.Add(para8);

        //    SqlParameter paraReturn = new SqlParameter("@return", SqlDbType.Int);
        //    paraReturn.Direction = ParameterDirection.ReturnValue;  //参数方向 为返回参数
        //    cmd.Parameters.Add(paraReturn);

        //    cmd.ExecuteNonQuery();

        //    object obj = paraReturn;
        //    if (obj.ToString() == "0")
        //    {
        //        //存储过程执行失败
        //    }
        //    else
        //    {
        //        //成功
        //    }
        //}
        //#endregion

本文的数据库用的是sql server自带数据Northwind 

1.只返回单一记录集的存储过程

SqlConnection sqlconn = new SqlConnection(conn);
SqlCommand cmd = new SqlCommand();
// 设置sql连接
cmd.Connection = sqlconn;
// 如果执行语句
cmd.CommandText = "Categoriestest1";
// 指定执行语句为存储过程
cmd.CommandType = CommandType.StoredProcedure;

SqlDataAdapter dp = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
// 填充dataset
dp.Fill(ds);
// 以下是显示效果
GridView1.DataSource = ds;
GridView1.DataBind();

存储过程Categoriestest1
CREATE PROCEDURE Categoriestest1
 AS
 select *
 from  Categories
 GO

2. 没有输入输出的存储过程
SqlConnection sqlconn = new SqlConnection(conn);
SqlCommand cmd = new SqlCommand();

cmd.Connection = sqlconn;
cmd.CommandText = "Categoriestest2";
cmd.CommandType = CommandType.StoredProcedure;
sqlconn.Open();
// 执行并显示影响行数
Label1.Text = cmd.ExecuteNonQuery().ToString();
sqlconn.Close();

存储过程Categoriestest2

CREATE PROCEDURE Categoriestest2  AS
 insert into dbo.Categories
 (CategoryName,[Description],[Picture])
 values ('test1','test1',null)
 GO

3. 有返回值的存储过程
SqlConnection sqlconn = new SqlConnection(conn);
         SqlCommand cmd = new SqlCommand();
         cmd.Connection = sqlconn;
         cmd.CommandText = "Categoriestest3";
         cmd.CommandType = CommandType.StoredProcedure;
         // 创建参数
        IDataParameter[] parameters = {
                 new SqlParameter("rval", SqlDbType.Int,4)
             };
         // 将参数类型设置为 返回值类型
        parameters[0].Direction = ParameterDirection.ReturnValue;
         // 添加参数
        cmd.Parameters.Add(parameters[0]);

         sqlconn.Open();
         // 执行存储过程并返回影响的行数
        Label1.Text = cmd.ExecuteNonQuery().ToString();
         sqlconn.Close();
         // 显示影响的行数和返回值
        Label1.Text += "-" + parameters[0].Value.ToString() ;

存储过程Categoriestest3

CREATE PROCEDURE Categoriestest3
 AS
 insert into dbo.Categories
 (CategoryName,[Description],[Picture])
 values ('test1','test1',null)
return @@rowcount
 GO

4. 有输入参数和输出参数的存储过程

 SqlConnection sqlconn = new SqlConnection(conn);
         SqlCommand cmd = new SqlCommand();
         cmd.Connection = sqlconn;
         cmd.CommandText = "Categoriestest4";
         cmd.CommandType = CommandType.StoredProcedure;
         // 创建参数
        IDataParameter[] parameters = {
                 new SqlParameter("@Id", SqlDbType.Int,4) ,
                 new SqlParameter("@CategoryName", SqlDbType.NVarChar,15) ,
             };
         // 设置参数类型
        parameters[0].Direction = ParameterDirection.Output;  // 设置为输出参数
        parameters[1].Value = "testCategoryName";
         // 添加参数
        cmd.Parameters.Add(parameters[0]);
         cmd.Parameters.Add(parameters[1]);

         sqlconn.Open();
         // 执行存储过程并返回影响的行数
        Label1.Text = cmd.ExecuteNonQuery().ToString();
         sqlconn.Close();
         // 显示影响的行数和输出参数
        Label1.Text += "-" + parameters[0].Value.ToString() ;

存储过程Categoriestest4      

CREATE PROCEDURE Categoriestest4
 @id int output,
 @CategoryName nvarchar(15)
 AS
 insert into dbo.Categories
 (CategoryName,[Description],[Picture])
 values (@CategoryName,'test1',null)
set  @id = @@IDENTITY
 GO

5. 同时具有返回值、输入参数、输出参数的存储过程

 SqlConnection sqlconn = new SqlConnection(conn);
         SqlCommand cmd = new SqlCommand();
         cmd.Connection = sqlconn;
         cmd.CommandText = "Categoriestest5";
         cmd.CommandType = CommandType.StoredProcedure;
         // 创建参数
        IDataParameter[] parameters = {
                 new SqlParameter("@Id", SqlDbType.Int,4) ,
                 new SqlParameter("@CategoryName", SqlDbType.NVarChar,15) ,
                 new SqlParameter("rval", SqlDbType.Int,4)
             };
         // 设置参数类型
        parameters[0].Direction = ParameterDirection.Output;       // 设置为输出参数
        parameters[1].Value = "testCategoryName";                  // 给输入参数赋值
        parameters[2].Direction = ParameterDirection.ReturnValue;  // 设置为返回值
        // 添加参数
        cmd.Parameters.Add(parameters[0]);
         cmd.Parameters.Add(parameters[1]);
         cmd.Parameters.Add(parameters[2]);

         sqlconn.Open();
         // 执行存储过程并返回影响的行数
        Label1.Text = cmd.ExecuteNonQuery().ToString();
         sqlconn.Close();
         // 显示影响的行数，输出参数和返回值
        Label1.Text += "-" + parameters[0].Value.ToString() + "-" + parameters[2].Value.ToString();

 存储过程Categoriestest5

CREATE PROCEDURE Categoriestest5
 @id int output,
 @CategoryName nvarchar(15)
 AS
 insert into dbo.Categories
 (CategoryName,[Description],[Picture])
 values (@CategoryName,'test1',null)
set  @id = @@IDENTITY
return @@rowcount
 GO

 6. 同时返回参数和记录集的存储过程
	SqlConnection sqlconn = new SqlConnection(conn);
	SqlCommand cmd = new SqlCommand();
	cmd.Connection = sqlconn;
	cmd.CommandText = "Categoriestest6";
	cmd.CommandType = CommandType.StoredProcedure;
         // 创建参数
        IDataParameter[] parameters = {
                 new SqlParameter("@Id", SqlDbType.Int,4) ,
                 new SqlParameter("@CategoryName", SqlDbType.NVarChar,15) ,
                 new SqlParameter("rval", SqlDbType.Int,4)                   // 返回值
            };
         // 设置参数类型
	parameters[0].Direction = ParameterDirection.Output;        // 设置为输出参数
	parameters[1].Value = "testCategoryName";                   // 给输入参数赋值
	parameters[2].Direction = ParameterDirection.ReturnValue;   // 设置为返回值
	// 添加参数
	cmd.Parameters.Add(parameters[0]);
	cmd.Parameters.Add(parameters[1]);
	cmd.Parameters.Add(parameters[2]);

	SqlDataAdapter dp = new SqlDataAdapter(cmd);
	DataSet ds = new DataSet();
	// 填充dataset
	dp.Fill(ds);
	// 显示结果集
	GridView1.DataSource = ds.Tables[0];
	GridView1.DataBind();

	Label1.Text = "";
	// 显示输出参数和返回值
	Label1.Text +=  parameters[0].Value.ToString() + "-" + parameters[2].Value.ToString();

存储过程Categoriestest6

CREATE PROCEDURE Categoriestest6
 @id int output,
 @CategoryName nvarchar(15)
 AS
 insert into dbo.Categories
 (CategoryName,[Description],[Picture])
 values (@CategoryName,'test1',null)
set  @id = @@IDENTITY
 select * from Categories
return @@rowcount
 GO

7. 返回多个记录集的存储过程

SqlConnection sqlconn = new SqlConnection(conn);
SqlCommand cmd = new SqlCommand();

cmd.Connection = sqlconn;
cmd.CommandText = "Categoriestest7";
cmd.CommandType = CommandType.StoredProcedure;

SqlDataAdapter dp = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
// 填充dataset
dp.Fill(ds);
// 显示结果集1
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();
// 显示结果集2
GridView2.DataSource = ds.Tables[1];
GridView2.DataBind();

存储过程Categoriestest7

CREATE PROCEDURE Categoriestest7
 AS
 select * from Categories
 select * from Categories
 GO