CREATING A STRONGLY TYPED DATASET

[ Team LiB ] Recipe 2.3 Creating a Strongly Typed DataSet Problem You want to create a strongly typed object wrapper around a DataSet. Solution Use one of the three techniques shown in the discussion to create a strongl[r]

[ Team LiB ] Recipe 2.18 Controlling the Names Used in a Strongly Typed DataSet Problem You want to assign your own names to the classes and properties for strongly typed DataSet classes. Solution Use annotations in the XML schema to control the name[r]

Modifying Data Using a Strongly Typed DataSet In Chapter 10, you saw how to create and use a strongly typed DataSet class named MyDataSet. You can use objects of this class to represent the Customers table and rows from that table. In this sect[r]

[ Team LiB ] Recipe 2.19 Replacing Null Values in a Strongly Typed DataSet Problem When a column in a database has a null value, you want the value in the DataSet to be a string indicating that no value is available. Solution Use annota[r]

Reading a Column Value Using Strongly Typed DataSet Classes A strongly typed DataSet object allows you read a column value using a property with the same name as the column. For example, to read the CustomerID of a column,[r]

// Create the Web Service object. NorthwindServiceCS nws = new NorthwindServiceCS( ); // Update the changes to the order and order detail // informatation. bool retVal = nws.UpdateOrders(dsChanges); } Cursor.Current = Cursors.Default; } Discussion An XML web service is software that is accessi[r]

// Create the parent and child column arrays. parentCols = new DataColumn[parentColsAL.Count]; parentColsAL.CopyTo(parentCols); childCols = new DataColumn[childColsAL.Count]; childColsAL.CopyTo(childCols); // Create the relation name based on the constraint name. relationName = prevConstraint[r]

MemoryStream ms = new MemoryStream( ); ds.WriteXml(ms, XmlWriteMode.DiffGram); // Write the memory stream to a file. FileStream fs = new FileStream(XMLDIFFGRAMFILENAME, FileMode.Create, FileAccess.Write); ms.WriteTo(fs); fs.Close( ); // Display the XML DiffGram. byte[] result = ms.T[r]

Viewer. The good news is that the Viewer actually has its own object model whereby you can set some of the properties at design time or runtime. The Viewer even has an event model that you can program. You can see the object model for the Windows Form CrystalReportViewer in Figure 10.12. Figure 10.1[r]

Updating a Database Using a DataSet In the exercises so far in this chapter, you have seen how to fetch data from a database. Now it's time to show you how to update data. First, however, we need to consider some potential problems and how using a DataSet ca[r]

better choice overVARCHAR, NVARCHAR,orVARBINARY columns.488www.getcoolebook.comNielsen c18.tex V4 - 07/21/2009 1:01pm Page 489Manipulating XML Data 18■ If the structure of the XML documents is defined, using typed XML columns will be a betterchoice. Typed XML columns provide bett[r]

SP0410_InsertParentChild Adds a new ParentChild record. SP0410_UpdateChild Updates the Child record matching the specified ChildId. SP0410_UpdateParent Updates the Parent record matching the specified ParentId.The sample code contains five event handlers and four methods: Form.Load This event[r]

{ // Create the Web Service object. NorthwindServiceCS nws = new NorthwindServiceCS( ); // Update the changes to the order and order detail // informatation. bool retVal = nws.UpdateOrders(dsChanges); } Cursor.Current = Cursors.Default; } Discussion An XML web service is software that is acce[r]

SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(); mySqlDataAdapter.SelectCommand = mySqlCommand; DataSet myDataSet = new DataSet(); mySqlConnection.Open(); mySqlDataAdapter.Fill(myDataSet, "Customers"); mySqlConnection.Close(); return myDataSet; } Note You'll need to cha[r]

?>This program tells Smarty where it can find the Smarty.class.php file, and where yourSmarty templates are located. Because we will be using both .php and .tpl template filesin this chapter, I have included everything you need in each file.Example 12-1 looks up the document root and sets the[r]

xsd.exe /d /l:VB operatorlist.xsd /n:operatorlistDS Ở đây ta dùng chương trình dụng cụ xsd.exe để phát sinh từ Schema operatorlist.xsd một dataset trong ngôn ngữ (language) lập trình VB với namespace tên operatorlistDS.Nếu bạn không thấy xsd.exe thì tìm nó trong folder \Program Files\Microsof[r]

Returning Strongly Typed Column Values Up to this point, you've retrieved column values from a DataReader only as generic objects of the System.Object class (such objects are often referred to as being of the C# object type). Note All classes in C# are derived from the System.O[r]

search criteria. You can use the index to get a single DataRowView from the DataView. The Row property of this DataRowView object is used to return the underlying DataRow object. The typed DataSet classes—including the DataTable, DataColumn, and DataRow objects—inherit from the[r]

Creating a DataSet Object Using Visual Studio .NET In this section, you'll learn how to create a DataSet using Visual Studio .NET. Note You'll find a completed VS .NET example project for this section in the DataSet directory. You can open this proje[r]

non-serializable objects early, gives you a sense of the performance and memory usages ofasp-net_state.exe, and allows you to choose from any of the session options at deployment time.❑ Use a basePageclass or helper object with strongly typed properties to simplify your c[r]