vb.net qr code dll s Note There are so many ways to process XML documents (even in ADO.NET and with SQLXML, a support in VB.NET

Print Data Matrix ECC200 in VB.NET s Note There are so many ways to process XML documents (even in ADO.NET and with SQLXML, a support

s Note There are so many ways to process XML documents (even in ADO.NET and with SQLXML, a support
ECC200 Maker In Visual Basic .NET
Using Barcode drawer for .NET Control to generate, create Data Matrix ECC200 image in .NET framework applications.
www.OnBarcode.com
Reading Data Matrix ECC200 In VB.NET
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
package for SQL Server 2000), that only time will tell if incorporating such features into a SQL Server data type was worth the effort. Because XML is such an important technology, being able to process XML documents purely in T-SQL does offer many possibilities. However, right now it s unclear how much more about the xml data type you ll ever need to know. At any rate, this chapter will give you what you need to know to start experimenting with it.
Barcode Generator In VB.NET
Using Barcode generation for .NET Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
Linear Barcode Generator In Visual Basic .NET
Using Barcode maker for .NET Control to generate, create Linear Barcode image in VS .NET applications.
www.OnBarcode.com
In the following examples, you ll use the two XML documents you were trying to produce in Using FOR XML. The first thing you ll do is create a table in which to store them.
Print European Article Number 13 In VB.NET
Using Barcode creation for VS .NET Control to generate, create European Article Number 13 image in .NET applications.
www.OnBarcode.com
Barcode Generation In Visual Basic .NET
Using Barcode printer for VS .NET Control to generate, create Barcode image in .NET applications.
www.OnBarcode.com
Try It Out: Creating a Table to Store XML
Data Matrix Maker In Visual Basic .NET
Using Barcode printer for .NET framework Control to generate, create ECC200 image in Visual Studio .NET applications.
www.OnBarcode.com
Encoding UPC Case Code In VB.NET
Using Barcode creation for .NET framework Control to generate, create ITF-14 image in VS .NET applications.
www.OnBarcode.com
To create a table to hold XML documents, in SSMSE, run the T-SQL in Listing 17-8.
Data Matrix 2d Barcode Recognizer In .NET Framework
Using Barcode reader for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Data Matrix ECC200 Maker In .NET
Using Barcode maker for ASP.NET Control to generate, create ECC200 image in ASP.NET applications.
www.OnBarcode.com
Listing 17-8. Creating the xmltest Table
Scanning Code 3/9 In .NET Framework
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
GS1 128 Generation In VS .NET
Using Barcode creator for Reporting Service Control to generate, create EAN / UCC - 14 image in Reporting Service applications.
www.OnBarcode.com
use northwind go create table xmltest ( xid int not null primary key, xdoc xml not null )
Code 128 Code Set C Decoder In VB.NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
PDF 417 Scanner In Visual Basic .NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
CHAPTER 17 s USING XML
Generate UCC - 12 In Visual Studio .NET
Using Barcode maker for Reporting Service Control to generate, create Universal Product Code version A image in Reporting Service applications.
www.OnBarcode.com
Read UCC-128 In C#
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
How It Works
Painting EAN / UCC - 13 In None
Using Barcode creation for Software Control to generate, create EAN / UCC - 13 image in Software applications.
www.OnBarcode.com
Barcode Printer In Visual Studio .NET
Using Barcode creation for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
Just as you expected. Though we ve said the xml data type is different from other SQL Server data types, columns of xml type are defined just like any other columns. (But they can t be used in primary keys.) Now, you ll insert your XML documents into xmltest, and query it to see that they were stored.
Reading DataMatrix In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Encoding PDF417 In Visual Studio .NET
Using Barcode creation for ASP.NET Control to generate, create PDF 417 image in ASP.NET applications.
www.OnBarcode.com
Try It Out: Storing and Retrieving XML Documents
To insert your XML documents: 1. Replace the code in the SQL edit window with that in Listing 17-9.
Listing 17-9. Inserting XML Documents into xmltest
insert into xmltest values( 1, ' <states> <state> <abbr>CA</abbr> <name>California</name> <city>Berkeley</city> <city>Los Angeles</city> <city>Wilmington</city> </state> <state> <abbr>DE</abbr> <name>Delaware</name> <city>Newark</city> <city>Wilmington</city> </state> </states> ' ) ; insert into xmltest values( 2,
CHAPTER 17 s USING XML
' <states> <state abbr="CA" name="California"> <city name="Berkeley"/> <city name="Los Angeles"/> <city name="Wilmington"/> </state> <state abbr="DE" name="Delaware"> <city name="Newark"/> <city name="Wilmington"/> </state> </states> ' )
2. Run the two INSERT statements, then display the table with select * from xmltest. You see the two rows displayed. Click the xdoc column in the first row and you should see the XML in Figure 17-7.
Figure 17-7. Viewing an XML column
How It Works
The same way all INSERTs work. You simply provided the primary keys as integers and the XML documents as strings. The query worked just as expected too. Now that you have some XML documents in a database, let s see how OPENXML handles them.
CHAPTER 17 s USING XML
Try It Out: Using OPENXML with XML Columns
To use OPENXML with the second XML document in xmltest: 1. Run the code in Listing 17-10. You should see the results in Figure 17-8.
Listing 17-10. Using OPENXML with xmltest
declare @xdoc xml select @xdoc = xdoc from xmltest where xid = 2 exec xml2tbl @xdoc
Figure 17-8. Using an XML column with OPENXML
2. Now change the xid value to 1 in the WHERE clause and rerun the code. You should see the results in Figure 17-9. Hmmm. What happened You get five rows, as expected, but all the values are NULL.
CHAPTER 17 s USING XML
Figure 17-9. Viewing an XML column
How It Works
Unlike in Listing 17-6, where you hard-coded the XML document, this time you retrieved it from the database with a query. Because you expected a single value in the result set, you simply assigned it to the local variable in the select list, so you could later pass it to xml2tbl.
select @xdoc = xdoc from xmltest where xid = 2 OPENXML worked fine for the attribute-centric second XML document, but it returned only nulls for the element-centric first one. This makes sense, because the schema you defined in the WITH clause in xml2tbl isn t appropriate for the first XML document: with ( sabbr char(2) '../@abbr', sname varchar(20) '../@name', cname varchar(20) '@name' )
Let s see how to make OPENXML correctly handle the element-centric XML document.
CHAPTER 17 s USING XML
Try It Out: Using an Element-centric Schema with OPENXML
To use OPENXML with the first XML document in xmltest: 1. Create a stored procedure, xml2tbl1, with the T-SQL in Listing 17-11. You should see the results in Figure 17-8.
Listing 17-11. Creating the xml2tbl1 Stored Procedure
use northwind go create procedure xml2tbl1 @xdoc xml as declare @xdocp int exec sp_xml_preparedocument @xdocp output, @xdoc select sabbr, sname, cname from openxml( @xdocp, '/states/state/city', 2 ) with ( sabbr char(2) '../abbr', sname varchar(20) '../name', cname varchar(20) '.' )
2. Now change the query that returned NULLs to call xml2tbl1. You should see the results in Figure 17-10.
Copyright © OnBarcode.com . All rights reserved.