C#調用預存程序詳解(帶傳回值、參數輸入輸出等)_C#教程

本文執行個體講述了C#調用預存程序的方法。分享給大家供大家參考，具體如下：

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");　　//給輸入參數賦值    SqlParameter parOutput =cmd.Parameters.Add("@studentname", SqlDbType.NVarChar, 50);　　//定義輸出參數    parOutput.Direction = ParameterDirection.Output;　　//參數類型為Output    SqlParameter parReturn = new SqlParameter("@return", SqlDbType.Int);    parReturn.Direction = ParameterDirection.ReturnValue; 　　//參數類型為ReturnValue    cmd.Parameters.Add(parReturn);    conn.Open();    cmd.ExecuteNonQuery();    MessageBox.Show(parOutput.Value.ToString());  //顯示輸出參數的值    MessageBox.Show(parReturn.Value.ToString());　　//顯示傳回值  }  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 --發生錯誤    BEGIN      ROLLBACK TRANSACTION      RETURN 0    END    ELSE    BEGIN      COMMIT TRANSACTION      RETURN @id  --執行成功  END

#region 執行預存程序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; //接受傳回值//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; //參數方向 為輸入參數//  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; //參數方向 為返回參數//  cmd.Parameters.Add(paraReturn);//  cmd.ExecuteNonQuery();//  object obj = paraReturn;//  if (obj.ToString() == "0")//  {//    //預存程序執行失敗//  }//  else//  {//    //成功//  }//}//#endregion

本文的資料庫用的是sql server內建資料Northwind

1.只返回單一記錄集的預存程序

SqlConnection sqlconn = new SqlConnection(conn);SqlCommand cmd = new SqlCommand();// 設定sql串連cmd.Connection = sqlconn;// 如果執行語句cmd.CommandText = "Categoriestest1";// 指定執行語句為預存程序cmd.CommandType = CommandType.StoredProcedure;SqlDataAdapter dp = new SqlDataAdapter(cmd);DataSet ds = new DataSet();// 填充datasetdp.Fill(ds);// 以下是顯示效果GridView1.DataSource = ds;GridView1.DataBind();

預存程序Categoriestest1

CREATE PROCEDURE Categoriestest1 AS select * from Categories GO

2. 沒有輸入輸出的預存程序

SqlConnection sqlconn = new SqlConnection(conn);SqlCommand cmd = new SqlCommand();cmd.Connection = sqlconn;cmd.CommandText = "Categoriestest2";cmd.CommandType = CommandType.StoredProcedure;sqlconn.Open();// 執行並顯示影響行數Label1.Text = cmd.ExecuteNonQuery().ToString();sqlconn.Close();

預存程序Categoriestest2

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

3. 有傳回值的預存程序

SqlConnection sqlconn = new SqlConnection(conn);SqlCommand cmd = new SqlCommand();cmd.Connection = sqlconn;cmd.CommandText = "Categoriestest3";cmd.CommandType = CommandType.StoredProcedure;// 建立參數IDataParameter[] parameters = {     new SqlParameter("rval", SqlDbType.Int,4)   };// 將參數類型設定為 傳回值類型parameters[0].Direction = ParameterDirection.ReturnValue;// 添加參數cmd.Parameters.Add(parameters[0]);sqlconn.Open();// 執行預存程序並返回影響的行數Label1.Text = cmd.ExecuteNonQuery().ToString();sqlconn.Close();// 顯示影響的行數和傳回值Label1.Text += "-" + parameters[0].Value.ToString() ;

預存程序Categoriestest3

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

4. 有輸入參數和輸出參數的預存程序

SqlConnection sqlconn = new SqlConnection(conn);SqlCommand cmd = new SqlCommand();cmd.Connection = sqlconn;cmd.CommandText = "Categoriestest4";cmd.CommandType = CommandType.StoredProcedure;// 建立參數IDataParameter[] parameters = {     new SqlParameter("@Id", SqlDbType.Int,4) ,     new SqlParameter("@CategoryName", SqlDbType.NVarChar,15) ,   };// 設定參數類型parameters[0].Direction = ParameterDirection.Output; // 設定為輸出參數parameters[1].Value = "testCategoryName";// 添加參數cmd.Parameters.Add(parameters[0]);cmd.Parameters.Add(parameters[1]);sqlconn.Open();// 執行預存程序並返回影響的行數Label1.Text = cmd.ExecuteNonQuery().ToString();sqlconn.Close();// 顯示影響的行數和輸出參數Label1.Text += "-" + parameters[0].Value.ToString() ;

預存程序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. 同時具有傳回值、輸入參數、輸出參數的預存程序

SqlConnection sqlconn = new SqlConnection(conn);SqlCommand cmd = new SqlCommand();cmd.Connection = sqlconn;cmd.CommandText = "Categoriestest5";cmd.CommandType = CommandType.StoredProcedure;// 建立參數IDataParameter[] parameters = {     new SqlParameter("@Id", SqlDbType.Int,4) ,     new SqlParameter("@CategoryName", SqlDbType.NVarChar,15) ,     new SqlParameter("rval", SqlDbType.Int,4)   };// 設定參數類型parameters[0].Direction = ParameterDirection.Output;    // 設定為輸出參數parameters[1].Value = "testCategoryName";         // 給輸入參數賦值parameters[2].Direction = ParameterDirection.ReturnValue; // 設定為傳回值// 添加參數cmd.Parameters.Add(parameters[0]);cmd.Parameters.Add(parameters[1]);cmd.Parameters.Add(parameters[2]);sqlconn.Open();// 執行預存程序並返回影響的行數Label1.Text = cmd.ExecuteNonQuery().ToString();sqlconn.Close();// 顯示影響的行數，輸出參數和傳回值Label1.Text += "-" + parameters[0].Value.ToString() + "-" + parameters[2].Value.ToString();

預存程序Categoriestest5

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

6. 同時返回參數和記錄集的預存程序

SqlConnection sqlconn = new SqlConnection(conn);SqlCommand cmd = new SqlCommand();cmd.Connection = sqlconn;cmd.CommandText = "Categoriestest6";cmd.CommandType = CommandType.StoredProcedure;// 建立參數IDataParameter[] parameters = {     new SqlParameter("@Id", SqlDbType.Int,4) ,     new SqlParameter("@CategoryName", SqlDbType.NVarChar,15) ,     new SqlParameter("rval", SqlDbType.Int,4)          // 傳回值  };// 設定參數類型parameters[0].Direction = ParameterDirection.Output;    // 設定為輸出參數parameters[1].Value = "testCategoryName";          // 給輸入參數賦值parameters[2].Direction = ParameterDirection.ReturnValue;  // 設定為傳回值// 添加參數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);// 顯示結果集GridView1.DataSource = ds.Tables[0];GridView1.DataBind();Label1.Text = "";// 顯示輸出參數和傳回值Label1.Text += parameters[0].Value.ToString() + "-" + parameters[2].Value.ToString();

預存程序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 Categoriesreturn @@rowcount GO

7. 返回多個記錄集的預存程序

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);// 顯示結果集1GridView1.DataSource = ds.Tables[0];GridView1.DataBind();// 顯示結果集2GridView2.DataSource = ds.Tables[1];GridView2.DataBind();

預存程序Categoriestest7

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

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