前面有TX留言問分頁的sql是怎麼樣的,看完這篇你也就知道了。
組件可以輸出執行的sql,方便查看sql生成的語句是否有問題。
通過註冊事件來輸出sql
DbSession.Default.RegisterSqlLogger(database_OnLog);
private string sql;
void database_OnLog(string logMsg)
{
//保存執行的DbCommand (sql語句和參數)
sql += "
" + logMsg;
}
DbSession.Default.UnregisterSqlLogger(database_OnLog);來註銷註冊的事件。
這裏是例子是asp.net
DbSession.Default.From()
.InnerJoin(Suppliers._.SupplierID == Products._.SupplierID)
.Page(10, 2)
.Select(Products._.ProductID, Products._.ProductName)
.ToDataTable();
執行上面的語句輸出的sql語句如下:
SELECT * FROM
( SELECT TOP 10 * FROM
( SELECT TOP 20 [Products].[ProductID],[Products].[ProductName]
FROM [Products]
INNER JOIN [Suppliers]
ON ([Suppliers].[SupplierID] = [Products].[SupplierID])
ORDER BY [Products].[ProductID] ASC) AS tempIntable
ORDER BY [ProductID] DESC) AS tempOuttable
ORDER BY [ProductID] ASC
DbSession.Default.From().Where(Products._.CategoryID == 2).ToFirst();
Text:
SELECT TOP 1 * FROM [Products] WHERE [Products].[CategoryID] = @ae2b9c6a112545e5b56fa6dc70f32ac1
Parameters:
@ae2b9c6a112545e5b56fa6dc70f32ac1[Int32] = 2