DbHelperSQL 增加事务处理方法（2种）

方法一： 
1 public static bool ExecuteSqlByTrans(List<SqlAndPrams> list)
         {
             bool success = true;
             Open();
             SqlCommand cmd = new SqlCommand();
             SqlTransaction trans = Connection.BeginTransaction();
             cmd.Connection = Connection;
             cmd.Transaction = trans;
             try
             {
                 foreach (SqlAndPrams item in list)
                 {
                     if (item.cmdParms == null)
                     {
                         cmd.CommandText = item.sql;
                         cmd.ExecuteNonQuery();
                     }
                     else
                     {
                         cmd.CommandText = item.sql;
                         cmd.CommandType = CommandType.Text;//cmdType;
                         cmd.Parameters.Clear();
                         foreach (SqlParameter parameter in item.cmdParms)
                         {
                             if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) && (parameter.Value == null))
                             {
                                 parameter.Value = DBNull.Value;
                             }
                             cmd.Parameters.Add(parameter);
                         }
                         cmd.ExecuteNonQuery();
                     }

                 }
                 trans.Commit();
             }
             catch (Exception e)
             {
                 success = false;
                 trans.Rollback();
             }
             finally
             {
                 Close();
             }
             return success;
         }

方法一对应的实体类：

 public class SqlAndPrams
     {
         public string sql { get; set; }

         public SqlParameter[] cmdParms { get; set; }
     }

DAL层代码：

 /// <summary>
         /// 增加一条数据
         /// </summary>
         public SqlAndPrams AddAccount(Entity.Account_T model)
         {
             SqlAndPrams result = new SqlAndPrams();
             StringBuilder strSql = new StringBuilder();
             strSql.Append("insert into Account_T(");
             strSql.Append("AccountNo,Type,Count,LoginName,Remark,CreateTime)");
             strSql.Append(" values (");
             strSql.Append("@AccountNo,@Type,@Count,@LoginName,@Remark,@CreateTime)");
             strSql.Append(";select @@IDENTITY");
             SqlParameter[] parameters = {
                     new SqlParameter("@AccountNo", SqlDbType.NVarChar,),
                     new SqlParameter("@Type", SqlDbType.NVarChar,),
                     new SqlParameter("@Count", SqlDbType.Int,),
                     new SqlParameter("@LoginName", SqlDbType.NVarChar,),
                     new SqlParameter("@Remark", SqlDbType.NVarChar,),
                     new SqlParameter("@CreateTime", SqlDbType.DateTime)};
             parameters[].Value = model.AccountNo;
             parameters[].Value = model.Type;
             parameters[].Value = model.Count;
             parameters[].Value = model.LoginName;
             parameters[].Value = model.Remark;
             parameters[].Value = model.CreateTime;

             result.sql = strSql.ToString();
             result.cmdParms = parameters;
             return result;
         }

调用层：

 List<SqlAndPrams> updateList = new List<SqlAndPrams>();
 Entity.Account_T model_account = new Entity.Account_T();
 model_account.CreateTime = DateTime.Now;
 model_account.LoginName = userName;
 model_account.Type = "消费";
 model_account.Count = -num;                        updateList.Add(dal_tran.AddAccount(model_account)); //添加进事务
 DbHelperSQL.ExecuteSqlByTrans(updateList)   //调用执行

方法二：暂时没有用，没有调用例子

 public static bool ExecuteSQL2(string[] SqlStrings)
         {
             bool success = true;
             Open();
             SqlCommand cmd = new SqlCommand();
             SqlTransaction trans = Connection.BeginTransaction();
             cmd.Connection = Connection;
             cmd.Transaction = trans;
             try
             {
                 foreach (string str in SqlStrings)
                 {
                     cmd.CommandText = str;
                     cmd.ExecuteNonQuery();
                 }
                 trans.Commit();
             }
             catch
             {
                 success = false;
                 trans.Rollback();
             }
             finally
             {
                 Close();
             }
             return success;
         }