Tài liệu Formatting Column Values When Outputting Data as XML pptx

... Recipe 8.9 Formatting Column Values When Outputting Data as XML Problem You need to save some of the columns in a DataTable as attributes instead of elements when you write out the data as XML. ... the XML. xmlTextBox.Text = ds.GetXml( ); } Discussion The ColumnMapping property of the DataColumn specifies how the value of a column will be written when th...

Ngày tải lên: 26/01/2014, 10:20

... areas:  Data accessibility. The requirement for data to follow a user, even when the users work at different computers on the network.  Data availability. The requirement to ensure that data ... User Data  How, frequency, by whom?  Current Data Recovery Procedures  How is data protected and where is it stored?  Current Data Security Procedures  Security and privacy...

Ngày tải lên: 10/12/2013, 15:15

... interoperability easier. For example, Microsoft Office XP uses XML as a format for storing initialization data. As a universal format for data, XML is an ideal format for importing and exporting data between ... Introduction XML in initialization files XML as import and export format XML in the presentation la yer XML as a pervasive system file format 10 Module...

Ngày tải lên: 10/12/2013, 16:15

... ] Recipe 10.3 Retrieving Column Default Values from SQL Server Problem The DataColumn object exposes a Default property. While the FillSchema( ) method of the DataAdapter returns schema ... sp_helpconstraint to get constraint information for the columns in the Orders table in the Northwind sample database. Column default values are identified and retrieved from the result set....

Ngày tải lên: 24/12/2013, 05:15

Ngày tải lên: 10/12/2013, 03:15

... desirable when the message is inaccurate, overstated, or unqualified. In recognition of this, the occasional researcher who has used the assertive sentence title has been taken to task. The authors ... of asthma on linear growth in children Asthma and linear growth in children Final height attainment of asthmatic children Titles that pose a question: Does asthma reduce linear growth? Are as...

Ngày tải lên: 10/12/2013, 12:15

... in data sources, such as relational databases. However, a lot of information exists as messages in electronic mail systems or as files in operating systems tables—rather than as tables in databases. ... (API) to OLE DB data. OLE DB builds on the success of ODBC by providing an open standard for accessing all types of data. Whereas ODBC was created to access relational databas...

Ngày tải lên: 11/12/2013, 14:15

... Summarizing Data 35 1. What is the significance of the null values in the productid and orderid columns? The null values in a row indicate that the value in the total_quantity column for ... columns to improve query performance. For example, if you aggregate frequently on the quantity column, indexing on the quantity column improves aggregate operations. The data type...

Ngày tải lên: 11/12/2013, 14:15

... Recipe 2.14 Passing Null Values to Parameters Problem You need to pass a null value to a parameter. Solution Use the System.DbNull.Value static value. The sample code, as shown in Example ... that input parameter was null. Example 2-18. Stored procedure: SP0214_NullParameter CREATE PROCEDURE SP0214_NullParameter @ValueIn int AS if @ValueIn is null select 1 as IsParamet...

Ngày tải lên: 14/12/2013, 18:16

... 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 ... xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com :xml- msdata" xmlns:codegen="urn:schemas-microsoft-com :xml- msprop" att...

Ngày tải lên: 14/12/2013, 18:16