存儲過程(Stored Procedure)即用來存儲數據表操作的一個過程,是把對數據表操作的方法存儲到一起的一個對象,是存儲在數據庫中。
優點:1.降低網絡傳輸數據量:通過存儲過程的名稱和參數傳遞即可調用執行,不用傳輸sql。
2.執行效率高:sqlserver會事先將存儲過程編譯成可執行的二進制代碼,運行存儲過程時,無需再次編譯。
3.封裝性:也可叫模塊式編程,將實現某種功能的多條sql封裝到一個對象中,可多次重復調用,可移植性強。
4.安全:可針對不同的權限的用戶使用不同的存儲過程。
下面講C#如何調用寫好的存儲過程,下面是對數據操作封裝幾個函數
1 //執行對表的增刪改操作的sql語句 2 public static int ExecuteCommand(string text) 3 { 4 using (SqlConnection conn = new SqlConnection(connectionString)) 5 { 6 conn.Open(); 7 using (SqlCommand cmd = new SqlCommand(text, conn)) 8 { 9 int i = cmd.ExecuteNonQuery(); 10 return i; 11 } 12 } 13 } 14 15 public static int ExecStoredProcedure(string procName, params SqlParameter[] parameters) 16 { 17 int rtn = 0; 18 using (SqlConnection conn = new SqlConnection(connectionString)) 19 { 20 conn.Open(); 21 using (SqlCommand cmd = conn.CreateCommand()) 22 { 23 SqlTransaction st = conn.BeginTransaction(); 24 cmd.Transaction = st; 25 try 26 { 27 cmd.CommandText = procName; 28 cmd.CommandType = CommandType.StoredProcedure; 29 cmd.Parameters.AddRange(parameters); 30 rtn= cmd.ExecuteNonQuery(); 31 st.Commit(); 32 return rtn; 33 } 34 catch(SqlException sqlex) 35 { 36 st.Rollback(); 37 throw sqlex; 38 } 39 } 40 } 41 } 42 public static int ExecuteStoredProcedure(string procName, 43 params SqlParameter[] parameters) 44 { 45 using (SqlConnection conn = new SqlConnection(connectionString)) 46 { 47 conn.Open(); 48 using (SqlCommand cmd = conn.CreateCommand()) 49 { 50 cmd.CommandText = procName; 51 cmd.CommandType = CommandType.StoredProcedure; 52 cmd.Parameters.AddRange(parameters); 53 return cmd.ExecuteNonQuery(); 54 } 55 } 56 57 }
推薦用第三種方式,用到了事務處理,若只要有一條不通過全部回滾,避免臟數據的產生。也可以在存儲過程中使用事務,后續會繼續更新...
1 protected void Button1_Click(object sender, EventArgs e) 2 { 3 string mainName = "圓夢組"; 4 string detailName="劉能|趙本山|沈燕|歐陽鋒"; 5 string detailAge="23|32|18|19"; 6 int rtn=DBHelper.ExecuteCommand(string.Format("exec dbo.Proc_TestBatchMainDetailIns '{0}','{1}','{2}'", mainName, detailName,detailAge)); 7 } 8 protected void Button2_Click(object sender, EventArgs e) 9 { 10 string mainName = "起航組2"; 11 string detailName="段毅2|喬峰2|楊過2|李莫愁2"; 12 string detailAge="18|28|jj|35"; 13 SqlParameter[] sps = new SqlParameter[] { 14 new SqlParameter("@mainName",mainName), 15 new SqlParameter("@detailNameStr",detailName), 16 new SqlParameter("@detailAgeStr",detailAge) 17 }; 18 try 19 { 20 int rtn = DBHelper.ExecuteStoredProcedure("dbo.Proc_TestBatchMainDetailIns", sps); 21 } 22 catch (Exception ex) 23 { 24 Response.Write(ex.Message); 25 } 26 27 } 28 protected void Button3_Click(object sender, EventArgs e) 29 { 30 string mainName = "起航組2"; 31 string detailName = "段毅2|喬峰2|楊過2|李莫愁2"; 32 string detailAge = "18|28|jj|35"; 33 SqlParameter[] sps = new SqlParameter[] { 34 new SqlParameter("@mainName",mainName), 35 new SqlParameter("@detailNameStr",detailName), 36 new SqlParameter("@detailAgeStr",detailAge) 37 }; 38 try 39 { 40 int rtn = DBHelper.ExecStoredProcedure("dbo.Proc_TestBatchMainDetailIns", sps); 41 } 42 catch (Exception ex) 43 { 44 Response.Write(ex.Message); 45 } 46 }
protected void Button1_Click(object sender, EventArgs e) 2 { 3 string mainName = "圓夢組"; 4 string detailName="劉能|趙本山|沈燕|歐陽鋒"; 5 string detailAge="23|32|18|19"; 6 int rtn=DBHelper.ExecuteCommand(string.Format("exec dbo.Proc_TestBatchMainDetailIns '{0}','{1}','{2}'", mainName, detailName,detailAge)); 7 } 8 protected void Button2_Click(object sender, EventArgs e) 9 { 10 string mainName = "起航組2"; 11 string detailName="段毅2|喬峰2|楊過2|李莫愁2"; 12 string detailAge="18|28|jj|35"; 13 SqlParameter[] sps = new SqlParameter[] { 14 new SqlParameter("@mainName",mainName), 15 new SqlParameter("@detailNameStr",detailName), 16 new SqlParameter("@detailAgeStr",detailAge) 17 }; 18 try 19 { 20 int rtn = DBHelper.ExecuteStoredProcedure("dbo.Proc_TestBatchMainDetailIns", sps); 21 } 22 catch (Exception ex) 23 { 24 Response.Write(ex.Message); 25 } 26 27 } 28 protected void Button3_Click(object sender, EventArgs e) 29 { 30 string mainName = "起航組2"; 31 string detailName = "段毅2|喬峰2|楊過2|李莫愁2"; 32 string detailAge = "18|28|jj|35"; 33 SqlParameter[] sps = new SqlParameter[] { 34 new SqlParameter("@mainName",mainName), 35 new SqlParameter("@detailNameStr",detailName), 36 new SqlParameter("@detailAgeStr",detailAge) 37 }; 38 try 39 { 40 int rtn = DBHelper.ExecStoredProcedure("dbo.Proc_TestBatchMainDetailIns", sps); 41 } 42 catch (Exception ex) 43 { 44 Response.Write(ex.Message); 45 } 46 }