WEB325 Building Data-Driven Web Sites in ASP.NET 2.0 Rob Howard [email protected] Telligent...

WEB325WEB325Building Data-Driven Web Sites in Building Data-Driven Web Sites in ASP.NET 2.0ASP.NET 2.0

Rob HowardRob [email protected]@telligent.comTelligent CorporationTelligent Corporation

Contact and SlidesContact and Slides

Rob HowardRob [email protected]@telligent.com

www.telligent.comwww.telligent.com

TelligentTelligent.NET Software Development Company.NET Software Development Company

Builds Community Server (communityserver.org)Builds Community Server (communityserver.org)

Download Slides & DemosDownload Slides & Demoswww.rob-howard.netwww.rob-howard.net

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Review: ASP.NET 1.XReview: ASP.NET 1.X

ASP.NET 1.XASP.NET 1.XIntroduced data controlsIntroduced data controls

Introduced data binding conceptsIntroduced data binding concepts

Working with data in ASP.NET 1.XWorking with data in ASP.NET 1.XEasy and simpleEasy and simple

Too much code still required thoughToo much code still required though

ASP.NET 2.0ASP.NET 2.0Specifically addresses common scenariosSpecifically addresses common scenarios

Makes working with data even easierMakes working with data even easier

AgendaAgenda

Safer connection string storageSafer connection string storage

Data binding gets easierData binding gets easier

Declarative data bindingDeclarative data binding

Working with the new data controlsWorking with the new data controls

Caching dataCaching data

Connection String StorageConnection String Storage

Persistence and declarative referencingPersistence and declarative referencingStored in *.configStored in *.configAvoid hard-coding within pages/codeAvoid hard-coding within pages/codeCan be optionally encryptedCan be optionally encrypted

Built-in design time supportBuilt-in design time supportPromote use for best practicesPromote use for best practicesEnable optional encrypting of values in configEnable optional encrypting of values in config

Admin SupportAdmin SupportMMC Admin Tool SupportMMC Admin Tool SupportConfiguration API SupportConfiguration API Support

Config Connection StringsConfig Connection Strings

<connectionStrings><connectionStrings>

<add name="pubs“ ProviderName=“…”<add name="pubs“ ProviderName=“…”

connectionString=“…” />connectionString=“…” />

</connectionStrings></connectionStrings>

<asp:SqlDataSource Id=“MySource” <asp:SqlDataSource Id=“MySource” ConnectionString=“<%$ connectionStrings:pubs %>” ConnectionString=“<%$ connectionStrings:pubs %>” SelectCommand=“select au_id from authors” SelectCommand=“select au_id from authors” runat=“server”/> runat=“server”/>

Web.config:

Page.aspx:

Dim connstr As String = Dim connstr As String = ConfigurationSettings.ConnectionStrings(“pubs”) ConfigurationSettings.ConnectionStrings(“pubs”)

Code.vb:

Connection StringsConnection Strings

Data Binding Gets EasierData Binding Gets Easier

Expressions are cleanerExpressions are cleaner

Support hierarchical (XML) data Support hierarchical (XML) data bindingbinding



<%# DataBinder.Eval (Container.DataItem, "Price") %><%# DataBinder.Eval (Container.DataItem, "Price") %>



<%# Eval ("Price") %><%# Eval ("Price") %>



<%# XPath ("Price") %><%# XPath ("Price") %>

Declarative Data BindingDeclarative Data Binding

Controls bound at appropriate timeControls bound at appropriate time

Wire-up done through propertiesWire-up done through properties

Page lifecycle knowledge not requiredPage lifecycle knowledge not required

NameName DescriptionDescription

SqlDataSource Connects data-binding controls to SQL databases

AccessDataSource Connects data-binding controls to Access databases

XmlDataSource Connects data-binding controls to XML data

ObjectDataSource Connects data-binding controls to data components

SiteMapDataSource Connects site navigation controls to site map data

SqlDataSourceSqlDataSource

Data binding to SQL DatabaseData binding to SQL DatabaseMicrosoft SQL Server, Oracle, DB2, etc.Microsoft SQL Server, Oracle, DB2, etc.

Two-way data binding supportedTwo-way data binding supportedSelectCommandSelectCommand

InsertCommand, UpdateCommand, and InsertCommand, UpdateCommand, and DeleteCommandDeleteCommand

Optional caching of query resultsOptional caching of query results

Parameterized operationParameterized operation

Using SqlDataSourceUsing SqlDataSource

<asp:SqlDataSource <asp:SqlDataSource

ID="Titles" ID="Titles" ConnectionString="<%$ connectionStrings:pubs %>" ConnectionString="<%$ connectionStrings:pubs %>" RunAt="server“ RunAt="server“ SelectCommand="select title_id, title, price SelectCommand="select title_id, title, price from titles" from titles" />/>

<asp:DataGrid <asp:DataGrid

DataSourceID="Titles" DataSourceID="Titles"

RunAt="server" />RunAt="server" />

SqlDataSource PropertiesSqlDataSource Properties


ConnectionString Connection string used to connect to data source

SelectCommand Command used to perform queries

InsertCommand Command used to perform inserts

UpdateCommand Command used to perform updates

DeleteCommand Command used to perform deletes

DataSourceMode Specifies whether DataSet or DataReader is used(default = DataSet)

ProviderName Specifies provider (default = SQL Server .NET provider)

SQL Data BindingSQL Data Binding

SqlDataSource and CachingSqlDataSource and Caching

Support declarative cachingSupport declarative caching


EnableCaching Specifies whether caching is enabled (default = false)

CacheDuration Length of time in seconds results should be cached

CacheExpirationPolicy Specifies whether cache duration is sliding or absolute

CacheKeyDependency Creates dependency on specified cache key

SqlCacheDependency Creates dependency on specified database entity


ID="Countries" ID="Countries"

RunAt="server"RunAt="server"

SelectCommand="select ..."SelectCommand="select ..."

EnableCaching="true" CacheDuration="60" />EnableCaching="true" CacheDuration="60" />

<asp:DropDownList <asp:DropDownList

ID="MyDropDownList" ID="MyDropDownList"

DataSourceID="Countries“DataSourceID="Countries“

DataTextField="country" DataTextField="country"

AutoPostBack="true" AutoPostBack="true"


Caching Query ResultsCaching Query Results

Parameterized CommandsParameterized Commands

Parameter properties Parameter properties Parameterized database commandsParameterized database commands

Example: Example: Get value for WHERE clause in SelectCommand Get value for WHERE clause in SelectCommand from query string parameter or item selected in from query string parameter or item selected in drop-down listdrop-down list

Example: Example: Get value for WHERE clause in DeleteCommand Get value for WHERE clause in DeleteCommand from GridViewfrom GridView

Parameters PropertiesParameters Properties


SelectParameters Specifies parameters for SelectCommand

InsertParameters

UpdateParameters

DeleteParameters

FilterParameters Specifies parameters for FilterExpression

Specifies parameters for InsertCommand

Specifies parameters for UpdateCommand

Specifies parameters for DeleteCommand

Parameter TypesParameter Types


ControlParameter Binds a replaceable parameter to a control property

CookieParameter Binds a replaceable parameter to a cookie value

FormParameter Binds a replaceable parameter to a form field

ProfileParameter Binds a replaceable parameter to a profile property

QueryStringParameter Binds a replaceable parameter to a query string parameter

Parameter Binds a replaceable parameter to a data field

SessionParameter Binds a replaceable parameter to a session variable

Using ControlParameterUsing ControlParameter


ID="Countries" RunAt="server"ID="Countries" RunAt="server"

SelectCommand="select distinct ..." />SelectCommand="select distinct ..." />


ID="Customers" RunAt="server"ID="Customers" RunAt="server"

SelectCommand="select * from customers where country=@Country">SelectCommand="select * from customers where country=@Country">

<SelectParameters><SelectParameters>

<asp:ControlParameter Name="Country" <asp:ControlParameter Name="Country"

ControlID="MyDropDownList"ControlID="MyDropDownList"

PropertyName="SelectedValue" />PropertyName="SelectedValue" />

</SelectParameters></SelectParameters>

</asp:SqlDataSource></asp:SqlDataSource>

<asp:DropDownList <asp:DropDownList

ID="MyDropDownList" DataSourceID="Countries"ID="MyDropDownList" DataSourceID="Countries"

DataTextField="country" AutoPostBack="true" RunAt="server" />DataTextField="country" AutoPostBack="true" RunAt="server" />

<asp:DataGrid DataSourceID="Customers" RunAt="server" /><asp:DataGrid DataSourceID="Customers" RunAt="server" />

Calling Stored ProceduresCalling Stored Procedures

<asp:SqlDataSource ID="Countries" RunAt="server"<asp:SqlDataSource ID="Countries" RunAt="server" ConnectionString="server=localhost;database=northwind;..."ConnectionString="server=localhost;database=northwind;..." SelectCommand="SelectCommand="proc_GetCountriesproc_GetCountries" />" /><asp:SqlDataSource ID="Customers" RunAt="server"<asp:SqlDataSource ID="Customers" RunAt="server" ConnectionString="server=localhost;database=northwind;..."ConnectionString="server=localhost;database=northwind;..." SelectCommand="SelectCommand="proc_GetCustomersproc_GetCustomers">"> <SelectParameters><SelectParameters> <asp:ControlParameter Name="Country" ControlID="MyDropDownList"<asp:ControlParameter Name="Country" ControlID="MyDropDownList" PropertyName="SelectedValue" />PropertyName="SelectedValue" /> </SelectParameters></SelectParameters></asp:SqlDataSource></asp:SqlDataSource><asp:DropDownList ID="MyDropDownList" DataSourceID="Countries"<asp:DropDownList ID="MyDropDownList" DataSourceID="Countries" DataTextField="country" AutoPostBack="true" RunAt="server" />DataTextField="country" AutoPostBack="true" RunAt="server" /><asp:DataGrid DataSourceID="Customers" RunAt="server" /><asp:DataGrid DataSourceID="Customers" RunAt="server" />

CREATE PROCEDURE proc_GetCustomersCREATE PROCEDURE proc_GetCustomers@Country nvarchar (32) AS@Country nvarchar (32) AS SELECT * FROM CustomersSELECT * FROM Customers WHERE Country = @CountryWHERE Country = @CountryGOGO

CREATE PROCEDURE proc_GetCustomersCREATE PROCEDURE proc_GetCustomers@Country nvarchar (32) AS@Country nvarchar (32) AS SELECT * FROM CustomersSELECT * FROM Customers WHERE Country = @CountryWHERE Country = @CountryGOGO

CREATE PROCEDURE proc_GetCountries ASCREATE PROCEDURE proc_GetCountries AS SELECT DISTINCT CountrySELECT DISTINCT Country FROM CustomersFROM Customers ORDER BY CountryORDER BY CountryGOGO

CREATE PROCEDURE proc_GetCountries ASCREATE PROCEDURE proc_GetCountries AS SELECT DISTINCT CountrySELECT DISTINCT Country FROM CustomersFROM Customers ORDER BY CountryORDER BY CountryGOGO

SqlDataSourceSqlDataSource

Data Source CapabilitiesData Source Capabilities

Common data operations get easierCommon data operations get easierSorting and pagingSorting and pagingSelecting, updating, inserting, deletingSelecting, updating, inserting, deleting

Page developer Page developer Sets properties to enable operationsSets properties to enable operationsEx., UpdateCommandEx., UpdateCommand

““Smart” data-bound controlsSmart” data-bound controlsUse these capabilities directlyUse these capabilities directlyEx., <asp:GridView>, <asp:DetailsView>Ex., <asp:GridView>, <asp:DetailsView>

Sorting, Paging, UpdatingSorting, Paging, Updating

Data Source PagingData Source Paging

Previous demo does paging in UI layerPrevious demo does paging in UI layerSqlDataSource returns all data rowsSqlDataSource returns all data rows

Performs paging by rendering subset of rowsPerforms paging by rendering subset of rows

Paging supported on data source interfacePaging supported on data source interfaceSelect (int startRowIndex, int maxRows)Select (int startRowIndex, int maxRows)

Requires user-defined procedure or custom code Requires user-defined procedure or custom code

Data-bound controlsData-bound controlsDon’t need to page in the UI layerDon’t need to page in the UI layer

Useful (and required) for large amounts of dataUseful (and required) for large amounts of data

Updates, Inserts, DeletesUpdates, Inserts, Deletes

GridView GridView Extracts values from input controlsExtracts values from input controlsKeys from viewstate (DataKeyNames)Keys from viewstate (DataKeyNames)

Dictionaries passed to data source operationDictionaries passed to data source operationUpdate: Keys, Values, OldValuesUpdate: Keys, Values, OldValuesDelete: Keys, OldValuesDelete: Keys, OldValues

Data source applies parameters to commandData source applies parameters to commandRelies on naming convention for parametersRelies on naming convention for parametersKeys, OldValues formatted with “original_” prefixKeys, OldValues formatted with “original_” prefixOldValuesParameterFormatString defines prefixOldValuesParameterFormatString defines prefix

ProgrammabilityProgrammability

Data source events Data source events Enable custom processingEnable custom processing

Use event to:Use event to:Manipulate command and parametersManipulate command and parameters

Cancel operationsCancel operations

Handle errorsHandle errors

Retrieve return values and output paramsRetrieve return values and output params

Rows affectedRows affected

Data-bound controls expose similar eventsData-bound controls expose similar events

Data Source EventsData Source Events

Sub MySource_Selecting(ByVal sender As Object, Sub MySource_Selecting(ByVal sender As Object, ByVal e As SqlDataSourceCommandEventArgs) ByVal e As SqlDataSourceCommandEventArgs)

Dim cmd As System.Data.SqlClient.SqlCommand = e.CommandDim cmd As System.Data.SqlClient.SqlCommand = e.Command

cmd.Parameters(“UserId”).Value = User.Identity.Namecmd.Parameters(“UserId”).Value = User.Identity.Name

End SubEnd Sub

<asp:SqlDataSource ID=“MySource” …<asp:SqlDataSource ID=“MySource” … OnSelecting=“MySource_Selecting” OnSelecting=“MySource_Selecting” SelectCommand=“sp_GetUserPreferences” SelectCommand=“sp_GetUserPreferences” runat=“server”/> runat=“server”/>

Page.aspx.vb

Page.aspx

ObjectDataSourceObjectDataSource

Most applications encapsulate data logicMost applications encapsulate data logicBest practice and simplifies maintenanceBest practice and simplifies maintenance

Embedding SQL code is not recommendedEmbedding SQL code is not recommended

ObjectDataSource ObjectDataSource Bind to custom business objectsBind to custom business objects

Visual Studio data componentsVisual Studio data components

Parallels SqlDataSource in object modelParallels SqlDataSource in object model

<asp:ObjectDataSource ID=“MySource” <asp:ObjectDataSource ID=“MySource” TypeName=“CustomersDB” TypeName=“CustomersDB” SelectMethod=“GetCustomersByRegion” SelectMethod=“GetCustomersByRegion” UpdateMethod=“UpdateCustomer” UpdateMethod=“UpdateCustomer” runat=“server”/> runat=“server”/>

Web Page

DataSourceID DataSourceID = = ObjectDataSource1ObjectDataSource1

ObjectDataSourceObjectDataSourceObjectDataSourceObjectDataSource

Northwind Northwind DatabaseDatabase

OrdersComponentOrdersComponent

OrderItemsComponentOrderItemsComponent

CompaniesComponentCompaniesComponent

<asp:ObjectDataSource<asp:ObjectDataSourceIDID = ObjectDataSource1 = ObjectDataSource1TypeName = TypeName = OrdersComponentOrdersComponentSelectMethodSelectMethod = GetOrders = GetOrdersUpdateMethodUpdateMethod = UpdateOrder = UpdateOrderDeleteMethodDeleteMethod = DeleteOrder = DeleteOrder

Returns IEnumerable of Returns IEnumerable of OrdersOrders

• Order.OrderIDOrder.OrderID• Order.OrderNameOrder.OrderName• Order.OrderDateOrder.OrderDate


Select method can return Select method can return any Object any Object

IEnumerable listIEnumerable list

Collection or arrayCollection or array

GetProducts() -> ProductCollectionGetProducts() -> ProductCollection

GetProductsDataSet() -> DataSetGetProductsDataSet() -> DataSet

GetProduct (int productId) -> ProductGetProduct (int productId) -> Product


Update, Insert, Delete methodsUpdate, Insert, Delete methodsTake individual fields or data item objectTake individual fields or data item object

For automatic updates/inserts/deletesFor automatic updates/inserts/deletesProperty or parameter names must match Property or parameter names must match selected fields for GridView/DetailsViewselected fields for GridView/DetailsView

UpdateProduct (int id, String name, double price)UpdateProduct (int id, String name, double price)

UpdateProduct (Product p) // p.Name, p.Price, etc.UpdateProduct (Product p) // p.Name, p.Price, etc.

DeleteProduct (int id)DeleteProduct (int id)

Key PropertiesKey Properties


TypeName Type name of data component

SelectMethod Method called on data component to perform queries

InsertMethod

UpdateMethod

DeleteMethod

EnableCaching Specifies whether caching is enabled (default = false)

Method called on data component to perform inserts

Method called on data component to perform updates

Method called on data component to perform deletes

Key Properties (cont’d)Key Properties (cont’d)


InsertParameters Specifies parameters for InsertMethod

UpdateParameters Specifies parameters for UpdateMethod

DeleteParameters Specifies parameters for DeleteMethod

SelectParameters Specifies parameters for SelectMethod

CacheDuration Length of time in seconds data should be cached

SqlCacheDependency Creates dependency on specified database entity

Initialization and Clean-UpInitialization and Clean-Up

Data operation methods Data operation methods Can identify static methodsCan identify static methodsCan identify instance methodsCan identify instance methods

If instance methods are used:If instance methods are used:New class instance on each callNew class instance on each callMust have public default constructorMust have public default constructor

ObjectCreated and ObjectDisposing ObjectCreated and ObjectDisposing Events to initialize or clean-upEvents to initialize or clean-up

Using ObjectDataSourceUsing ObjectDataSource

What about DataSets?What about DataSets?

Works for both Web and client applicationsWorks for both Web and client applications

Created from Created from DB schemaDB schemaDynamic SQL Dynamic SQL Stored ProceduresStored Procedures

Exposes methods to “Fill” and “Fetch”Exposes methods to “Fill” and “Fetch”Auto-generated Insert/Update/DeleteAuto-generated Insert/Update/Delete

““A middle tier data access layer for Web and client”A middle tier data access layer for Web and client”

What about DataSets?What about DataSets?

Supports partial classes for custom logicSupports partial classes for custom logic

Built in support for common tasksBuilt in support for common tasksSelect, Update, Insert, DeleteSelect, Update, Insert, DeleteBatch updates, Conflict resolution*Batch updates, Conflict resolution*

Works with Web services and remotingWorks with Web services and remotingDataTable can be standalone DataTable can be standalone (XmlSerializable, ReadXml) (XmlSerializable, ReadXml) Exposes “GetBy” for stateless callsExposes “GetBy” for stateless callsCan be used with custom base classesCan be used with custom base classes

GridView ControlGridView Control

Enhanced DataGrid controlEnhanced DataGrid controlRenders sets of records as HTML tablesRenders sets of records as HTML tables

Built-in sorting, paging, selecting, Built-in sorting, paging, selecting, updating, and deleting supportupdating, and deleting supportSupports rich assortment of field types, Supports rich assortment of field types, including CheckBoxFieldsincluding CheckBoxFields

Declared in <Columns> elementDeclared in <Columns> element

Highly customizable UIHighly customizable UI

GridView ExampleGridView Example


ID="Employees" ID="Employees"

RunAt="server"RunAt="server"

SelectCommand="select lastname, .../>SelectCommand="select lastname, .../>

<asp:GridView <asp:GridView

DataSourceID="Employees" DataSourceID="Employees"

Width="100%" Width="100%"


Rendered GridViewRendered GridView

GridView Field TypesGridView Field Types

Name Description

BoundField Renders columns of text from fields in data source

ButtonField Renders columns of buttons (push button, image, or link)

CheckBoxField Renders Booleans as check boxes

HyperLinkField Renders columns of hyperlinks

TemplateField Renders columns using HTML templates

CommandField Renders controls for selecting and editing GridView data

ImageField Renders columns of images from URL text

Specifying Field TypesSpecifying Field Types

<asp:SqlDataSource ID="Employees" RunAt="server"<asp:SqlDataSource ID="Employees" RunAt="server"

ConnectionString="server=localhost;database=northwind;..."ConnectionString="server=localhost;database=northwind;..."

SelectCommand="select photo, lastname, firstname, title from SelectCommand="select photo, lastname, firstname, title from employees" />employees" />

<asp:GridView DataSourceID="Employees" Width="100%" <asp:GridView DataSourceID="Employees" Width="100%" RunAt="server"RunAt="server"

AutoGenerateColumns="false" >AutoGenerateColumns="false" >

<Columns><Columns>

<asp:TemplateField HeaderText="Name"><asp:TemplateField HeaderText="Name">

<ItemTemplate><ItemTemplate>

<%# Eval ("firstname") + " " + Eval ("lastname") %><%# Eval ("firstname") + " " + Eval ("lastname") %>

</ItemTemplate></ItemTemplate>

</asp:TemplateField></asp:TemplateField>

<asp:BoundField HeaderText="Title" DataField="title" /><asp:BoundField HeaderText="Title" DataField="title" />

</Columns></Columns>

</asp:GridView></asp:GridView>

Rendered OutputRendered Output

DetailsView ControlDetailsView Control

Renders individual recordsRenders individual recordsPair with GridView for master-detail viewsPair with GridView for master-detail viewsOr use without GridView to display Or use without GridView to display individual recordsindividual records

Built-in paging, inserting, updating, Built-in paging, inserting, updating, deletingdeletingUses same field types as GridViewUses same field types as GridView

Declared in <Fields> elementDeclared in <Fields> element

Highly customizable UIHighly customizable UI

DetailsView ExampleDetailsView Example

<asp:SqlDataSource ID="Employees" RunAt="server"<asp:SqlDataSource ID="Employees" RunAt="server"


SelectCommand="select employeeid, photo, ... from employees" />SelectCommand="select employeeid, photo, ... from employees" />

<asp:DetailsView DataSourceID="Employees" RunAt="server"<asp:DetailsView DataSourceID="Employees" RunAt="server"

AllowPaging="true" AutoGenerateRows="false"AllowPaging="true" AutoGenerateRows="false"

PagerSettings-Mode="NextPreviousFirstLast">PagerSettings-Mode="NextPreviousFirstLast">

<Fields><Fields>

<asp:BoundField HeaderText="Employee ID" DataField="employeeid" /><asp:BoundField HeaderText="Employee ID" DataField="employeeid" />

<asp:BoundField HeaderText="Date Hired" DataField="hiredate" /><asp:BoundField HeaderText="Date Hired" DataField="hiredate" />

<asp:TemplateField HeaderText="Name"><asp:TemplateField HeaderText="Name">

<ItemTemplate><ItemTemplate>

<%# Eval ("firstname") + " " + Eval ("lastname") %><%# Eval ("firstname") + " " + Eval ("lastname") %>

</ItemTemplate></ItemTemplate>

</asp:TemplateField></asp:TemplateField>

<asp:BoundField HeaderText="Title" DataField="title" /><asp:BoundField HeaderText="Title" DataField="title" />

</Fields></Fields>

</asp:DetailsView></asp:DetailsView>

Rendered OutputRendered Output

Master-DetailMaster-Detail

SQL Cache Invalidation SQL Cache Invalidation

New cache dependency typeNew cache dependency typeEmbodied in SqlCacheDependency classEmbodied in SqlCacheDependency class

Configured through Configured through <sqlCacheDependency> configuration <sqlCacheDependency> configuration sectionsection

Links cached items to database entitiesLinks cached items to database entitiesASP.NET application cacheASP.NET application cache

ASP.NET output cacheASP.NET output cache

Compatible with SQL Server 7, 2000, Compatible with SQL Server 7, 2000, 20052005

Using SqlCacheDependency with the Using SqlCacheDependency with the Application CacheApplication Cache

Cache.Insert ("Products", products,Cache.Insert ("Products", products,

new SqlCacheDependency ("Northwind", "Products");new SqlCacheDependency ("Northwind", "Products");

Database name

Table name

Using SqlCacheDependency with the Using SqlCacheDependency with the Output CacheOutput Cache

<%@ OutputCache Duration="60" VaryByParam="None"<%@ OutputCache Duration="60" VaryByParam="None"

SqlDependency="Northwind:Products" %>SqlDependency="Northwind:Products" %>

Database name

Table name

Using SqlCacheDependency with Using SqlCacheDependency with SqlDataSourceSqlDataSource

<asp:SqlDataSource ID="Countries" RunAt="server"<asp:SqlDataSource ID="Countries" RunAt="server"


SelectCommand="select distinct country from customers order by country"SelectCommand="select distinct country from customers order by country"

EnableCaching="true" CacheDuration="60000"EnableCaching="true" CacheDuration="60000"

SqlCacheDependency="Northwind:Customers" />

<asp:DropDownList ID="MyDropDownList" DataSourceID="Countries"<asp:DropDownList ID="MyDropDownList" DataSourceID="Countries"

DataTextField="country" AutoPostBack="true" RunAt="server" />DataTextField="country" AutoPostBack="true" RunAt="server" />

Database name

Table name

Cache ConfigurationCache Configuration

<cache><cache>Enable/disable application cacheEnable/disable application cache

Enable/disable item expiration and moreEnable/disable item expiration and more

<outputCache>, <outputCache>, <outputCacheSettings><outputCacheSettings>

Enable/disable output cachingEnable/disable output caching

Enable/disable disk-based persistenceEnable/disable disk-based persistence

Set maximum size per app and moreSet maximum size per app and more

<sqlCacheDependency><sqlCacheDependency>

SQL Cache InvalidationSQL Cache Invalidation

ReviewReview

Simplified data bindingSimplified data binding

Data source controlsData source controls

Data controlsData controlsGridView and DetailsView controlsGridView and DetailsView controls

Editing with GridView and DetailsViewEditing with GridView and DetailsView

CachingCachingSQL Cache Invalidation SQL Cache Invalidation

Cache configurationCache configuration

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WEB325 Building Data-Driven Web Sites in ASP.NET 2.0 Rob Howard [email protected] Telligent...

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