String connectionString = ConfigurationManager.ConnectionStrings["DB_Constr"].ToString();SqlConnection conn = null;SqlTransaction trans = null;try { conn = new SqlConnection(connectionString); if (conn.State != ConnectionState.Open) conn.Open(); //開啟事務，可以指定事無級別。默認為提交才可以查詢 trans = conn.BeginTransaction(); //save(conn, trans); DbUtils.commit(trans);} catch (Exception ex) { DbUtils.rollback(trans); ClientScript.RegisterStartupScript(this.GetType(), "錯誤提示", "<script>alert('" + StringUtil.toJsStr(ex.Message) + "');</script>");} finally { DbUtils.closeQuietly(conn, trans);}String connectionString = ConfigurationManager.ConnectionStrings["DB_Constr"].ToString();SqlConnection conn = null;try { conn = new SqlConnection(connectionString); if (conn.State != ConnectionState.Open) conn.Open();} catch (Exception ex) { ScriptManager.RegisterStartupScript(this, this.GetType(), "mess", "<script>alert('"+StringUtil.toJsStr(ex.Message)+"')</script>", false);} finally { DbUtils.closeQuietly(conn);}

using System;using System.Collections.Generic;using System.Text;namespace Tools{ public sealed class StringUtil {  public static bool isEmpty(String str) {   if (str == null) return true;   if (str.Length == 0) return true;   if (str == String.Empty) return true;   return false;  }  public static bool isNotEmpty(String str) {   return !isEmpty(str);  }  public static String toJsStr(String str) {   str = str.Replace("'", "http://'");   str = str.Replace("/r", "");   str = str.Replace("/n", "http://n");   return str;  }  public static void Main() {   Console.Write(isNotEmpty(null));   Console.Read();  } }}

using System;using System.Collections.Generic;using System.Text;using System.Data.SqlClient;using System.Data;namespace Tools{ public class DbUtils {  public static SqlConnection getConnection(string connectstr) {   SqlConnection conn = new SqlConnection(connectstr);   if (conn.State != ConnectionState.Open) {    conn.Open();   }   return conn;  }  public static void closeQuietly(SqlConnection conn) {   try {    close(conn);   } catch { }  }  public static void closeQuietly(SqlTransaction trans) {   try {    close(trans);   } catch { }  }  public static void close(SqlConnection conn) {   if (conn != null) {    conn.Close();    conn.Dispose();   }  }  public static void close(SqlTransaction trans) {   if (trans != null) {    trans.Dispose();   }  }  public static void closeQuietly(SqlConnection conn, SqlTransaction trans) {   closeQuietly(trans);   closeQuietly(conn);  }  public static void commit(SqlTransaction trans) {   try {    if(trans!=null) trans.Commit();   } catch{ }  }  public static void rollback(SqlTransaction trans) {   try {    if (trans != null) trans.Rollback();   } catch { }  } }}