Lesson 2 Working with data in a connected environment

. data providers?How to retrieving data using a DataReader?What is DataReader?Slide 3ConnectionConnectionDataReaderDataReaderDatabaseDatabaseWindowsFormWindowsFormCommandCommand Connected. timeOnly one DataReader use at a timeTie to connection => cannot used other DataReaderExplicitly close DataReader after usedDataReader cannot be used for data bindingUsing with stored. null value in a rela5onal database is used when the value in a column is unknown or missing If you try to retrieve a null value through a DataReader and assign it to a value type, it causes an...

. System .Data ArchitectureCommand ObjectConnection ObjectProgramProviderDataSetDataReaderDataAdapterDatabaseAction SQLMaintain data Maintain data Get data Get data 23 VB.Net 20 05 - Chapter. 4VB.Net 20 05 - Chapter 67Main Difference:DataSet-DataReaderDataSet Data structure to store schema and data in a disconnected fashionUseful for editing data offline and later update to data. dr("City").toStringLoopdr.CloseDatareader and MS Access3VB.Net 20 05 - Chapter 65System .Data ArchitectureDataReaderDatabaseProgramDataProviderDataSetDataAdapterVB.Net 20 05 - Chapter 66Details:...

. Gettype(integer)AllowDBNullAutoIncrementDefaultValueUniqueReadOnlyDataSetDataTableDataRowDataColumnDataTableDataRowDataColumn Lesson 3: Creating DataAdapter Objects What Is a DataAdapterBetween Dataset/Datatable and. and DatabaseConnect to Command and ConnectionFill and Update Dataset/DataTableDisconect to Dataset/DataTable Lesson 2: Creating DataTable Objects.Create a DataTable.Add a DataTable. Disconnected Environment Objectives in chapterCreate a DataSet graphically.Create a DataSet programmatically.Add a DataTable to a DataSet.Add a relationship between tables within a DataSet.Navigate...

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. 5-FU with radiation treatment for advanced esophageal carcinomas. Anticancer Res. 20 03; 23 : 3493-8. 15. Yamada H, Maki H, Takeda Y, et al. Evaluation of combined nedaplatin and docetaxel therapy. human head and neck cancer in vivo. Anticancer Res. 20 06; 26 : 989-94. 16. Yamashita H, Nakagawa K, Tago M, et al. Radiation therapy combined with cis-diammine-glycolatoplatinum (nedaplatin). squamous cell carcinoma. J Gastroenterol. 20 06; 41: 425 - 32. 10. Sakaeda T, Yamamori M, Kuwahara A, et al. Pharmacokinetics and pharmacogenomics in esophageal cancer chemoradio-therapy. Adv Drug...

. Example 3-5. File: ADOCookbookCS0305.aspx.cs // Namespaces, variables, and constants using System; using System.Threading; using System.Globalization; using System .Data; using System .Data. SqlClient;. user's culture. [ Team LiB ] [ Team LiB ] Recipe 3.5 Localizing Client-Side Data in a Web Forms Application Problem You need to format dates and currency values according to. client rather than the server. Solution Use client culture and encoding to return data to the client formatted according to the client's localization settings rather than the server's...

. Team LiB ] Recipe 4.7 Updating a Data Source with Data from a Different Data Source Problem You want to update a data source using changes made to another data source for data replication. Creates a new DataSet containing only the records that have changed in the original data source. This DataSet is then used to apply the changes to a second data source using its DataAdapter;. not information about the provider that was used to retrieve the data or the original source of the data. The DataSet tracks changes made to data by maintaining multiple versions of each row allowing...

. ); dataGrid.DataKeyField = "Id"; dataGrid.DataBind( ); } private DataTable CreateDataSource( ) { DataTable dt = new DataTable(TABLENAME); // Create the DataAdapter and. Session["DataSource"] = dt; return dt; } private DataTable UpdateDataSource(DataTable dt) { // Create a DataAdapter for the update. SqlDataAdapter da = new SqlDataAdapter("SELECT. edit, change, and insert data into the DataGrid control and how to update the data source with the changes made. By default, the DataGrid displays tabular data in read-only mode. With in- place...

. W3C XML Path Language (XPath) is a navigation language used to select nodes from an XML Document. It is defined by W3 as a standard navigation language. The specification can be found at http://www.w3.org/TR/xpath.. Form.Load Sets up the sample by creating a DataSet containing the Orders table and Order Details table from Northwind and a nested relation between the two tables. Go Button.Click Executes an. "Using XPath Queries." In .NET, the DataSet is synchronized with the XmlDataDocument. As a result, in some cases XML services can be used to access the XmlDataDocument to perform certain functionality...

. raw time values into readable values that < Day Day Up > Working with Dates in Flash It's useful in Flash to be able to access date information—to display the date, make. calendar_dc instance, the date information is updated accordingly. Clicking the showToday_btn instance moves the calendar_dc instance to today's date and updates the displayed date information. any means other than the user's interacting with the calendar_dc instance. When this occurs, a Date object representative of today's date is placed into calendarDate. The information...