C#调用存储过程详解(带返回值、参数输入输出等)

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

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

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datasetdp.Fill(ds);// 以下是显示效果GridView1.DataSource = ds;GridView1.DataBind();

CREATE PROCEDURE Categoriestest1 AS select * from Categories GO

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();

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

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() ;

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

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() ;

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

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();

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

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datasetdp.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();

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 Categoriesreturn @@rowcount GO

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datasetdp.Fill(ds);// 显示结果集1GridView1.DataSource = ds.Tables[0];GridView1.DataBind();// 显示结果集2GridView2.DataSource = ds.Tables[1];GridView2.DataBind();

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