databinding in asp.net 2.0
DESCRIPTION
Adam Calderon – C# MVP Application Development Practice Lead InterKnowlogy. DataBinding in ASP.NET 2.0. Agenda. ADO.NET New Features Binding Model Changes. ADO.NET New Features. DbProviderFactories SqlConnection Web.config SqlCommand TransactionScope SqlDataAdaptor DataSet. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/1.jpg)
DataBinding in ASP.NET 2.0
Adam Calderon – C# MVPApplication Development Practice LeadInterKnowlogy
![Page 2: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/2.jpg)
Agenda
ADO.NET New Features Binding Model Changes
![Page 3: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/3.jpg)
ADO.NET New Features
DbProviderFactories SqlConnection Web.config SqlCommand TransactionScope SqlDataAdaptor DataSet
![Page 4: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/4.jpg)
ADO.NET New Features - DbProviderFactory CreateCommand CreateCommandBuilder CreateConnection CreateDataAdaptor CreateParameter
![Page 5: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/5.jpg)
ADO.NET New Features – DbProviderFactory Sample // Data Comes from Inputs on Form
string provider = ProviderNameBox.Text; string connString = ConnectionStringBox.Text; string commandText = CommandTextBox.Text;
// Get the provider DbProviderFactory fact = DbProviderFactories.GetFactory(provider);
// Create the connection DbConnection conn = fact.CreateConnection(); conn.ConnectionString = connString;
// Create the data adapter DbDataAdapter adapter = fact.CreateDataAdapter(); adapter.SelectCommand = conn.CreateCommand(); adapter.SelectCommand.CommandText = commandText;
// Run the query DataTable table = new DataTable(); adapter.Fill(table);
// Shows the results Results.DataSource = table; Results.DataBind();
![Page 6: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/6.jpg)
ADO.NET New Features – SqlConnection Asynchronous Operation Support Failover Partner MultipleActiveResultSets (MARS) Connection String Builders
![Page 7: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/7.jpg)
ADO.NET New Features – Web.config ConnectionStrings element
ConfigurationManager.ConnectionStrings[“MySql”].ConnectionString
Protecting Connection Strings Use aspnet_regiis.exe to encrypt
web.config <protectedData>
<protectedDataSections> <add name=“connectionStrings”
provider=“RSAProtectedConfigurationProvider” />
</protectedDataSections></protectedData>
![Page 8: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/8.jpg)
ADO.NET New Features – SqlCommand Async Methods
Requires Async attribute on connection string
Limited to non-query command Reader or XmlReader
Begin/End ExecuteNonQuery ExecuteReader ExecuteXmlReader
3 Patterns for Async Implementation
![Page 9: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/9.jpg)
ADO.NET New Features – SqlCommand Async Patterns (1)
// Start a non-blocking executionIAsyncResult iar = cmd.BeginExecuteReader();
// Do work while command running ….
// Block the execution until doneSqlDataReader reader =
cmd.EndExecuteReader(iar);
// Process data hereWorkWithData(reader);
![Page 10: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/10.jpg)
ADO.NET New Features – SqlCommand Async Patterns (2)
// Start a non-blocking executionIAsyncResult iar = cmd.BeginExecuteReader();
do {
// Do work while command running ….} while (!iar.IsComleted);
// Sync up and process dataSqlDataReader reader = cmd.EndExecuteReader(iar);
// Process data hereWorkWithData(reader);
![Page 11: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/11.jpg)
ADO.NET New Features – SqlCommand Async Patterns (3)
// Start a non-blocking executionIAsyncResult iar = cmd.BeginExecuteReader( new
AsyncCallback(WorkWithData),cmd);
// … later in your code
Public void WorkWithData(IAsyncResult ar){
// Retrieve the context of the callSqlCommand cmd = (SqlCommand) ar.AsyncState;
// Complete the async operationSqlDataReader reader = cmd.EndExecuteReader(ar);
}
![Page 12: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/12.jpg)
ADO.NET New Features – TransactionScope Supports Dispose Pattern Determines if local or distributed
transaction are needed Objects that support ITransaction can
participate
![Page 13: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/13.jpg)
ADO.NET New Features – TransactionScopeusing (TransactionScope ts = new System.Transactions.TransactionScope()) { bool success = true;
using (SqlConnection conn = new SqlConnection(ConnString)) { SqlCommand cmd = new SqlCommand(UpdateCmd, conn); cmd.Connection.Open(); try { cmd.ExecuteNonQuery(); } catch (SqlException ex) { // Error handling code goes here lblMessage.Text = ex.Message; success = false; } }
// Must call to complete; otherwise abort if(success)
ts.Complete(); }
![Page 14: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/14.jpg)
ADO.NET New Features - SqlDataAdaptor New Properties
AcceptChangesDuringUpdate FillLoadOption▪ OverwriteChanges (Current and Orginal)▪ PreserveChanges (Original Only)▪ Upsert (Current Version of row)
ReturnProviderSpecificTypes UpdateBatchSize
![Page 15: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/15.jpg)
ADO.NET New Features - DataSet New Properties
RemotingFormat▪ Binary or Xml
SchemaSerializationMode (IncludeShema/ExcludeSchema)
New Methods CreateDataReader – Creates a reader off
a Data Table
![Page 16: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/16.jpg)
ADO.NET New Features – DataSet CreateDataReader
DataSet data = new DataSet();SqlDataAdapter adapter = new SqlDataAdapter(
"SELECT * FROM employees;SELECT * FROM customers",
ConfigurationManager.ConnectionStrings["LocalNWind"].ConnectionString);
adapter.Fill(data);
// Access the whole data set record by recordDataTableReader reader = data.CreateDataReader();
do{
while (reader.Read())Response.Write(String.Format("{0} <br>",
reader[1]));
Response.Write("<hr>");} while (reader.NextResult());
reader.Close();
![Page 17: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/17.jpg)
ADO.NET New Features
![Page 18: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/18.jpg)
Binding Model Changes
New Data Source Properties Binding Expressions Data Source Controls
![Page 19: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/19.jpg)
Binding Model Changes – New Data Source Properties DataSourceID AppendDataBoundItems
![Page 20: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/20.jpg)
Binding Model Changes – Binding Expressions (1) DataBinder.Eval
Can be used anywhere Eval (shortcut for DataBinder.Eval)
Can be used in the context of a data bound control
<%# Eval(“lastName”)%>
![Page 21: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/21.jpg)
Binding Model Changes – Binding Expressions (2) XPathBinder.Eval
Used with Xml data anywhere Xpath (shortcut for XPathBinder.Eval)
Can be used in the context of a data bound control <%# Xpath(“Orders/Order/Customer/LastName”)
%> XPathBinder.Select
Returns a nodeset that can be assigned to bound controls Data Source
DataSource=‘<%# XPathSelect(“orders/order/summary”)%>
![Page 22: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/22.jpg)
Binding Model Changes – Binding Expressions (3) Bind Method
<asp:TextBox …. Text=‘<%# Bind(“notes”)%>
Two-Way Binding Dynamic Expressions
Evaluated when page compiles <%$ AppSettings:AppVersionNumber %> <%$ Resources:Resource, helloString%> <%$ ConnectionString:localNWind%>
![Page 23: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/23.jpg)
Binding Model Changes – Data Source Controls Tabular Data Source Controls
AccessDataSource ObjectDataSource SqlDataSource
Hierarchical Data Source Controls SiteMapDataSource XmlDataSource
DataSourceView
![Page 24: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/24.jpg)
Binding Model Changes – Data Source Controls – SqlDataSource (1)
Properties for all of the actions (Delete,Insert,Update,Select) Command Parameters CommandType
FilterExpression / FilterParameters (only works with DataSet set for the DataSourceMode)
![Page 25: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/25.jpg)
Binding Model Changes – Data Source Controls – SqlDataSource (2)
DataSourceMode Determines how data is returned
(DataSet or DataReader) CancelSelectOnNull
Canceled data retrieval if parameter is null
![Page 26: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/26.jpg)
Binding Model Changes – Data Source Controls – SqlDataSource (3)
Command contain own set of parameters
Declarative Parameters ControlParameter CookieParameter FormParameter ProfileParameter QueryStringParameter SessionParameter
![Page 27: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/27.jpg)
Binding Model Changes – Data Source Controls – SqlDataSource (4)
Caching Behavior CacheDuration (seconds) CacheExpirationPolicy (absolute,sliding) CacheKeyDependency (expiring the key) SqlCacheDependency (table dependent)
Created with each distinct SelectCommand, ConnectionString and SelectParameters
![Page 28: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/28.jpg)
Binding Model Changes
![Page 29: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/29.jpg)
Session Summary
Async Features of ADO.NET can help in some situations
ConnectionString builders New TransactionScope simplifies
transactions Binding Expressions simplify page
development New DataSource objects simplify
binding to Sql Server and Objects
![Page 30: DataBinding in ASP.NET 2.0](https://reader035.vdocument.in/reader035/viewer/2022062315/56815e53550346895dcccd1d/html5/thumbnails/30.jpg)
Adam Calderon More info on InterKnowlogy:
www.InterKnowlogy.com Contact Information
E-mail: [email protected]: 760-930-0075 x274Blog: http://blogs.InterKnowlogy.com/AdamCalderon
About Adam Calderon Microsoft MVP – C# Microsoft UI Server Frameworks Advisory Council Developer / Author / Speaker / Teacher