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C#中的SQLCommand命令與DbTransaction事務(wù)處理_C#教程_腳本之家

SqlCommand cmd = new SqlCommand("Insert int **", conn); cmd.Transaction = trans;//為命令指定一個(gè)事務(wù) cmd.ExecuteNonQuery(); //可以有多個(gè)SqlCommand一并執(zhí)行,一起提交或回滾 trans.Commit(); } catch { trans.Rollback(); } Transaction事務(wù)隔離

www.dbjr.com.cn/article/2477...htm 2025-5-30

SqlCommandBuilder如何實(shí)現(xiàn)批量更新_實(shí)用技巧_腳本之家

SqlDataAdapter myAdapter =newSqlDataAdapter(); SqlCommand myCommand =newSqlCommand("select * from "+strTblName),(SqlConnection)this.conn); myAdapter.SelectCommand = myCommand; SqlCommandBuilder myCommandBuilder =newSqlCommandBuilder(myAdapter); myAdapter.Update(ds,strTblName); return0; } catch(Busines...

www.dbjr.com.cn/article/739...htm 2025-6-2

解析如何正確使用SqlConnection的實(shí)現(xiàn)方法_C#教程_腳本之家

SqlCommand command = new SqlCommand("select * from customers", conn); command.ExecuteNonQuery(); command.Dispose(); Thread.Sleep(5000); //模擬耗時(shí)的查詢 conn.Close(); Console.WriteLine("Thread:{0} 執(zhí)行完畢,{1}", Thread.CurrentThread.Name, DateTime.Now); } 代碼很簡(jiǎn)單,模擬兩個(gè)線程同時(shí)執(zhí)行Ex...

www.dbjr.com.cn/article/367...htm 2025-5-30

sqlserver 存儲(chǔ)過程分頁(yè)代碼_MsSql_腳本之家

SqlCommand comm = new SqlCommand("P_viewPage_A", conn); //建立SqlCommand對(duì)象 comm.CommandType = CommandType.StoredProcedure; //設(shè)置SqlCommand對(duì)象執(zhí)行類型為存儲(chǔ)過程 comm.Parameters.Add("@TableName", SqlDbType.VarChar ,200); //向Parameters參數(shù)列表添加參數(shù) comm.Parameters.Add("@FieldList", SqlDbTy...

www.dbjr.com.cn/article/23842_a...htm 2025-5-21

.net下調(diào)用sqlserver存儲(chǔ)過程的小例子_實(shí)用技巧_腳本之家

首先,在sqlserver中創(chuàng)建存儲(chǔ)過程,在調(diào)用時(shí)分為有參數(shù)和沒有參數(shù)兩種情況,先就簡(jiǎn)單的沒有參數(shù)的情況簡(jiǎn)要的介紹: 假設(shè)存儲(chǔ)過程如下: 代碼如下: create proc selectall as select * from studentinf 則此sp的調(diào)用如下: sqlcommand selectcmd = new sqlcommand(“selectall”, conn); ...

www.dbjr.com.cn/article/377...htm 2025-5-30

C#訪問SqlServer設(shè)置鏈接超時(shí)的方法_C#教程_腳本之家

本文實(shí)例講述了C#訪問SqlServer設(shè)置鏈接超時(shí)的方法。分享給大家供大家參考。具體實(shí)現(xiàn)方法如下: 下面這段代碼設(shè)置超時(shí)時(shí)間為60秒,默認(rèn)為30秒 1 2 3 4 5 6 using(connection) { SqlCommand sqlcommand = connection.CreateCommand(); sqlcommand.CommandTimeout = 60; ...

www.dbjr.com.cn/article/685...htm 2025-5-26

解析為何要關(guān)閉數(shù)據(jù)庫(kù)連接,可不可以不關(guān)閉的問題詳解_C 語言_腳本之家

SqlCommand cmd = new SqlCommand( string.Format("Insert into Nums values('{0}') ", id), conn); cmd.ExecuteNonQuery(); } 運(yùn)行: 可以看到ExecuteNonQuery方法拋出了異常,原因是連接處于關(guān)閉狀態(tài)。可是我們的連接一直都是open著的啊,并沒有調(diào)用close,dispose之類的方法啊。

www.dbjr.com.cn/article/367...htm 2025-5-28

c# 數(shù)據(jù)庫(kù)的 sql 參數(shù)封裝類的編寫_C#教程_腳本之家

SqlCommand cmd = null; public DbAccess() { // // TODO: 在此處添加構(gòu)造函數(shù)邏輯 // conn = new SqlConnection(); //conn.ConnectionString = "initial catalog=pubs;data source=.;user id=sa;password="; //conn.ConnectionString = Convert.ToString(System.Configuration.ConfigurationSettings.AppSettings[...

www.dbjr.com.cn/article/130...htm 2025-5-23

c#實(shí)現(xiàn)sqlserver事務(wù)處理示例_C#教程_腳本之家

代碼如下: private static void ExecuteSqlTransaction(string connectionString) { using (SqlConnection connection = new SqlConnection(connectionString)) { connection.Open(); SqlCommand command = connection.CreateCommand(); SqlTransaction transaction;

www.dbjr.com.cn/article/455...htm 2025-5-23

c#調(diào)用存儲(chǔ)過程實(shí)現(xiàn)登錄界面詳解_C#教程_腳本之家

using (SqlCommand cmd = new SqlCommand("Pro_Login", con)) { //把文本框的值作為參數(shù)傳給存儲(chǔ)過程 cmd.Parameters.Add("@UserName", SqlDbType.VarChar, 10).Value = textBox1.Text.Trim(); cmd.Parameters.Add("@PassWord", SqlDbType.VarChar, 10).Value = textBox2.Text.Trim(); ...

www.dbjr.com.cn/article/348...htm 2025-5-27