一、查詢

1 ）簡單查詢 ?

一種方式（分解構(gòu)造式） ?

SubSonic. Query query =? TPjWorkday .CreateQuery();

???????? query.SelectList =? TPjWorkday . Columns .Year+? ", " ?+? TPjWorkday . Columns .Yearmonth +? "," ?+? TPjWorkday . Columns .Workdays;

???????? query.AddWhere( TPjWorkday . Columns .Year,yearNum);

???????? query.OrderBy = SubSonic. OrderBy .Asc( TPjWorkday . Columns .Yearmonth);

???????? DataTable dt = query.ExecuteDataSet().Tables[0];

???????? return dt;

另外一種方式（ LINQ 式）

SqlQuery? query=? new Select ( TPjWorkday . Columns .Year,? TPjWorkday . Columns .Yearmonth,? TPjWorkday . Columns .Workdays).From( TPjWorkday .Schema

? ).Where( TPjWorkday . Columns .Year).IsEqualTo(yearNum).OrderAsc( TPjWorkday . Columns .Yearmonth);

?? DataTable dt = query.ExecuteDataSet().Tables[0];

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2 ） LIKE 查詢

queryBuilder.AddWhere( TBaseAddressbook . Columns .Name,? Comparison .Like, "%" + this .tbName.Text+ "%" );

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3 ）查詢單值

SqlQuery ?query =? new Select ( TBaseDepartment . Columns .Deptname).From( TBaseDepartment .Schema

??????????????? ? ).Where( TBaseDepartment . Columns .Deptid).IsEqualTo(deptid);

return ?query.ExecuteScalar().ToString();

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4 ）多表連接查詢（連接查詢的表的數(shù)量超過 3 個(gè)最好使用視圖）

根據(jù)單位 ID 獲取用戶

SqlQuery ?query= new Select ( TBaseUser .UseridColumn, TBaseUser .UsernameColumn,? TBaseUser .PersonnameColumn,? TBaseUser .PhonecodeColumn,? TBaseUser .EmailColumn)

???????? .From( TBaseUser .Schema).InnerJoin( TLstUserindepartment .UseridColumn,? TBaseUser .UseridColumn)

???????? .Where( TBaseUser .EnabledColumn).IsEqualTo(1)

???????? .And( TLstUserindepartment .DeptidColumn).IsEqualTo(deptid)

???????? .OrderAsc( TBaseUser . Columns .Userid);

????????? DataTable dt = query.ExecuteDataSet().Tables[0];

注意 InnerJoin （ f2,f1 ）的用法。也就是說當(dāng)兩個(gè)表連接時(shí)， From 語句里面的表要放在后面。

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5 ）分頁查詢

（方式一， Query ）

//Query 方式分頁 , 序號(hào)列使用 rowindex, ???? oracle 數(shù)據(jù)庫

Query ?query1 =? new Query ( TBaseUser .Schema);

???????? query1.SelectList =? TBaseUser . Columns .Userid+? "," ?+? TBaseUser . Columns .Personname +? "," +? TBaseUser . Columns .Phonecode+ "," +? TBaseUser . Columns .Email +? "," +? TBaseUser . Columns .Userindex;

???????? query1.AddWhere( TBaseUser . Columns .Issignedin, Comparison .Equals, 1); // 登錄狀態(tài)

???????? query1.AND( TBaseUser . Columns .Enabled, Comparison .Equals, 1); // 啟用

???????? query1.OrderBy =? OrderBy .Asc( TBaseUser . Columns .Userindex);

???????? int ?sum= query1.GetRecordCount(); // 用于計(jì)算總頁數(shù)

query1.PageSize = 12; // 分頁大小

???????? query1.PageIndex = pagenum -1; // 當(dāng)前頁

???????? DataTable ViewData = query1.ExecuteDataSet().Tables[0];

???????? if (sum%12==0)

???????????? this .lbPageCount.Text= (sum / 12).ToString();

???????? else

???????????? this .lbPageCount.Text= (sum / 12+1).ToString();

???????? this .lbPageNum.Text= pagenum.ToString();

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（方式二、 SqlQuery ）

//SqlQuery 方式分頁，序號(hào)列使用 row_number ??? oracle 數(shù)據(jù)庫

SqlQuery ?query =? new Select ().From( VWfSupervisor .Schema).Where( VWfSupervisor . Columns .Userid).IsEqualTo(CreateUserInfo().userid).OrderAsc( VWfSupervisor . Columns .Userid);

int ?sum = query.GetRecordCount(); // 未分頁前，總記錄數(shù)

query.Paged(pagenum - 1, 12);

DataTable ?ViewData = query.ExecuteDataSet().Tables[0];

if (sum%12==0)

?????? this .lbPageCount.Text= (sum / 12).ToString();

? else

??????? this .lbPageCount.Text= (sum / 12+1).ToString();

? this .lbPageNum.Text= pagenum.ToString();

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二、插入，更新和刪除

插入和更新操作都是通過實(shí)體的 Save() 方法來實(shí)現(xiàn)的，判斷更新與插入操作主要體現(xiàn)在實(shí)體的 IsNew 屬性，如果 IsNew==true ，則執(zhí)行的是插入操作，反之執(zhí)行的是更新操作。

當(dāng)實(shí)例化一個(gè)實(shí)體時(shí)，如 TPjWorkday ?newworkday =? new TPjWorkday () ，此時(shí)的 newworkday.IsNew=true;

當(dāng)實(shí)例化傳入?yún)?shù)時(shí)，

TPjAttendancetime ?attendanceTime =? new TPjAttendancetime ( Convert .ToInt32(dt.Rows[0][ "flowid" ])); 此時(shí)的 newworkday.IsNew=false 。

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1. 插入

TPjWorkday ?newworkday =? new TPjWorkday ();

newworkday.Year =? Convert .ToInt32(lbYear.Text);

newworkday.Yearmonth=? Convert .ToInt32( this .lbYear.Text)* 100 + (i + 1);

newworkday.Workdays = workStr;

newworkday.Save();

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new Insert ( TLstUserinrole .Schema, false ).Value( TLstUserinrole .UseridColumn,2).Value( TLstUserinrole .RoleidColumn, 2)

???????????? .Value( TLstUserinrole .CreatebyColumn,3).Value( TLstUserinrole .CreatetimeColumn,? DateTime .Now).Execute();

其中 false 表示不是全部字段。默認(rèn)為 true

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2. 更新

單字段逐漸更新方式，傳入主鍵字段值

TPjAttendancetime ?attendanceTime =? new TPjAttendancetime ( Convert .ToInt32(dt.Rows[0][ "flowid" ]));

attendanceTime.Begintime =? Convert .ToDateTime(tbBeginTime.Value);

attendanceTime.Endtime =? Convert .ToDateTime(tbEndTime.Value);

attendanceTime.AM1 =? Convert .ToDateTime(dlAm1.SelectedValue).ToShortTimeString();

attendanceTime.AM2 =? Convert .ToDateTime(dlAm2.SelectedValue).ToShortTimeString();

attendanceTime.PM1 =? Convert .ToDateTime(dlPm1.SelectedValue).ToShortTimeString();

attendanceTime.PM2 =? Convert .ToDateTime(dlPm2.SelectedValue).ToShortTimeString();

attendanceTime.Modifyby =? Convert .ToInt32(Request.QueryString[ "userid" ]);

attendanceTime.Modifytime = System. DateTime .Now;

attendanceTime.Save();

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new Update ( TPjInnernews .Schema).Set( TPjInnernews .NewstitleColumn).EqualTo( "123" ).Where( TPjInnernews .NewsidColumn).IsEqualTo(3);

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復(fù)合主鍵更新方式，（ userid ， ascxid ）

new Update ( TLstUserhomepage .Schema).Set( TLstUserhomepage . Columns .Modifytime).EqualTo(System. DateTime .Now).Set( TLstUserhomepage . Columns .Modifyby).EqualTo(3).Where( TLstUserhomepage .UseridColumn)

???????????? .IsEqualTo(409).And( TLstUserhomepage .AscxidColumn).IsEqualTo(11).Execute();

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// 修改記錄 ,? 先取得對象，然后再更新

???????????? TBaseStatistic type= new Select ().From( TBaseStatistic .Schema).Where( TBaseStatistic . Columns .Typeid).IsEqualTo( int .Parse(GetEQString( "Typeid" )))

???????????????? .And( TBaseStatistic . Columns .Statid).IsEqualTo( int .Parse( this .Label3.Text)).ExecuteScalar();

???????????? type.Statname =? this .TextBox1.Text.Trim();

???????????? type.Stattabname =? this .Label1.Text;

???????????? type.Statcolname =? this .Label12.Text;

???????????? type.Statcolid =? this .Label7.Text;

???????????? type.Datecolname=? this .Label14.Text;

???????????? type.Wherepart=? this .Label8.Text;

type.Save();

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UPDATE table set column=column+ 1

int ?records =? new Update ( Product .Schema)

???????????????? .SetExpression( "UnitPrice" ).EqualTo( "UnitPrice * 3" )

???????????????? .Where( "productid" ).IsEqualTo(1)

???????????????? .Execute();

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3. 刪除

Query ?q =? TPjWorkday .CreateQuery();

q.WHERE( TPjWorkday . Columns .Year,? Convert .ToInt32(lbYear.Text));

q.QueryType =? QueryType .Delete;

q.Execute();

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TPjWorkday .Delete( TPjWorkday . Columns .Yearmonth,? "200901" );

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三、事務(wù)處理

using ?( SharedDbConnectionScope sp =? new SharedDbConnectionScope ())

{

?? using ?( TransactionScope scope =? new TransactionScope ())

?? {

????????? // 數(shù)據(jù)庫操作

????????? // ? 不能使用平臺(tái)的自增操作，否則會(huì)報(bào)錯(cuò)：

{" 無法加載 ?DLL “ oramts.dll ” :? 找不到指定的模塊。 ?( 異常來自 HRESULT:0x8007007E) 。 "}

//CACA.BusinessLogic.Util.CounterUtil.increment("EntityInnernews")

????????? scope.Complete();

}

}

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List < SqlQuery >list =? new List < SqlQuery >();

list.Add( new Delete ().From( TBaseAddressbook .Schema).Where( TBaseAddressbook . Columns .Serialno).IsEqualTo(lbl.Text));

list.Add( new Delete ().From( TBaseAddressbookusual .Schema).Where( TBaseAddressbookusual . Columns .Serialno).IsEqualTo(lbl.Text));

SqlQuery .ExecuteTransaction(list);

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List < Insert >list=new? List < Insert >();

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存儲(chǔ)過程：

//StoredProcedure spd = newStoredProcedure("GetDataTable");

???????? //spd.Command.AddParameter("@userid",userid);

???????? //spd.Command.AddOutputParameter("@dataresult");

??????? //spd.Execute();

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四、 SubSonic 直接執(zhí)行 SQL 語句 ( 后門，當(dāng)遇到無法解決的問題時(shí)，直接寫 SQL 語句 )

SubSonic 直接執(zhí)行 SQL 語句可以使用以下方式：

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// 執(zhí)行 sql 語句，返回 datatable

QueryCommand qc = newQueryCommand(strSql.ToString(), null);

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???????????????? dt =DataService.GetDataSet(qc).Tables[0];

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public void Inline_Simple()

{

????? QueryCommandcmd = new InlineQuery().GetCommand("SELECT productID from products");

????? Assert.IsTrue(cmd.CommandSql==?

??????????????? "SELECT productID fromproducts");

}

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public void Inline_WithCommands()

{

????? QueryCommandcmd = new InlineQuery()

?????????????? .GetCommand(@"SELECTproductID from products?

?????????????????? WHEREproductid=@productid", 1);

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????? Assert.IsTrue(cmd.Parameters[0].ParameterName== "@productid");

????? Assert.IsTrue((int)cmd.Parameters[0].ParameterValue== 1);

}

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public void Inline_AsCollection()

{

????? ProductCollectionproducts =

????????? newInlineQuery()

?????????????? .ExecuteAsCollection<ProductCollection>(

????????????????????????? @"SELECTproductID from products?

?????????????????????????? WHEREproductid=@productid", 1);

}

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五、常用方法的返回值

Execute(), 返回受影響的記錄條數(shù)

//ExecuteScalar() ，返回一個(gè) object ，（ System.Decimal 類型的值）

ExecuteSingle< T >() ，返回 T 類型的對象，例如可以用這個(gè)方法獲得滿足要求的實(shí)體對象。

TDicItem ?item=? new Select ().From( TDicItem .Schema).Where( TDicItem . Columns .Dicitemid).IsEqualTo(2)

???????????? .And( TDicItem . Columns .Dictypeid).IsEqualTo(1030).ExecuteSingle< TDicItem >();

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ExecuteDataSet(), 返回一個(gè)記錄集 DataSet

ExecuteTypedList<T>(); 返回 List<T>, 對象的列表，例如

List< Product >products = new? Select ().From< Product >()

.Where( Product .ProductIDColumn).IsEqualTo(4)

.Paged(1, 30)

.ExecuteTypedList< Product >();

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