filling a dataset using an xml template query

Ngày tải lên: 21/01/2014, 11:20

Ngày tải lên: 21/01/2014, 11:20

... "< /xml& gt;"; xmlDoc.LoadXml(adoXml); // Create a namespace manager for the XML document. XmlNamespaceManager nm = new XmlNamespaceManager(xmlDoc.NameTable); // Add ADO prefixes. ... convert a DataSet to an ADO Recordset so that you can use it in a legacy application. Solution You must persist the DataSet to XML, transform it to ADO Recordset schema, and load it into an ADO ... Create a table of the schema for the DataReader. DataTable schemaTable = dr.GetSchemaTable( ); // Create an XML document. XmlDocument xmlDoc = new XmlDocument( ); // Add ADO namespace...

Ngày tải lên: 14/12/2013, 18:16

... Create and fill the DataSet counting elapsed ticks. DataSet ds = CreateDataSet( ); [ Team LiB ] Recipe 9.9 Improving Performance While Filling a DataSet Problem Given a DataSet containing ... Cursors.Default; } private DataSet CreateDataSet( ) { DataSet ds = new DataSet( ); // Create the Orders table. DataTable dtOrders = new DataTable(ORDERS_TABLE); DataColumnCollection ... contained DataTable objects are used, if specified. A DataAdapter is used to fill a specified DataSet with data from the Orders and Order Details tables in the Northwind database. Ten iterations...

Ngày tải lên: 14/12/2013, 18:16

... start a new thread to fill the DataSet. Thread thread = new Thread(new ThreadStart(AsyncFillDataSet)); thread.Start( ); } else { // DataSet already being filled. Display a message. ... methods, such as a DataGrid, cannot be called on any thread other than the one that created the form or control because they are based on a single- threaded apartment (STA) model. Method calls from ... DataTable(ORDERS_TABLE); da.FillSchema(orderTable, SchemaType.Source); da.Fill(orderTable); ds.Tables.Add(orderTable); // Fill the OrderDetails table and add it to the DataSet. da...

Ngày tải lên: 21/01/2014, 11:20

Ngày tải lên: 21/01/2014, 11:20

... "ORDER BY CustomerID"; SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(); mySqlDataAdapter.SelectCommand = mySqlCommand; DataSet myDataSet = new DataSet( ); mySqlConnection.Open(); ... changes are then applied to your DataSet. This is similar to calling the Merge() method of a DataSet in that changes from one DataSet are merged with another. Fragment Reads an XML file that ... Chapter 16 , " ;Using SQL Server's XML Support." Using the WriteXml() Method Let's say you have a DataSet object named myDataSet. Assume that myDataSet has a DataTable that...

Ngày tải lên: 24/12/2013, 01:17

... </xs:schema> - <diffgr:diffgram xmlns:msdata="urn:schemas-microsoft-com :xml- msdata" xmlns:diffgr="urn:schemas-microsoft-com :xml- diffgram-v1"> - <NewDataSet xmlns=""> ... If the username and password check out, then the GetUserInfo method is called, passing the username once again. The first table from the returned dataset is assigned to the DataSource property ... xmlns:msdata="urn:schemas-microsoft-com :xml- msdata"> - <xs:element name="NewDataSet" msdata:IsDataSet="true"> - <xs:complexType> - <xs:choice maxOccurs="unbounded">...

Ngày tải lên: 24/12/2013, 06:17

... Team LiB ] Recipe 8.8 Creating an XML File That Shows Changes Made to a DataSet Problem When you use the GetXML( ) method of the DataSet, you may see only the current values in the DataSet. ... sample code contains two event handlers and a single method: Form.Load Sets up the sample by loading the Categories table from Northwind into a DataSet and displays the DiffGram for the DataSet ... // Namespaces, variables, and constants using System; using System.Configuration; using System.Text; using System.IO; using System .Xml; using System .Xml. Schema; using System.Data; values....

Ngày tải lên: 21/01/2014, 11:20

Ngày tải lên: 26/01/2014, 10:20

... (QA Training), Andy Longshaw (Content Masters) Content Lead: Janet Robinson Graphic Artist: Scott Serna (Creative Assets) Media Management: David Mahlmann Media Production: Dean Connolly (Art ... the trademarks of their respective owners. Program Manager: Steve Merrill Instructional Designers: Sangeeta Nair (NIIT), Vijayalakshmi Narayanaswamy (NIIT) Subject Matter Experts: Andy ... this lab, you will create an XSL style sheet to transform XML data into an HTML table in the LitWare Books Web application. Starter and solution files There are starter and solution files associated...

Ngày tải lên: 09/12/2013, 17:15

... interop. While the data can be loaded into a DataSet in this way, there is no way to reconcile the changes made to the data in the DataSet with the data source underlying the ADO object. This ... DataTable dt = new DataTable("Orders"); (new OleDbDataAdapter( )).Fill(dt, rs); conn.Close( ); // Bind the default view of the dt to the grid. dataGrid.DataSource = dt.DefaultView; ... the overloads of the OLE DB .NET DataAdapter.Fill( ) method accepts an ADO Recordset or Record object. The COM component that returns an ADO Recordset or Record object is consumed using COM...

Ngày tải lên: 14/12/2013, 18:16

... second, and a period of one second. Update Button.Click Uses a DataAdapter to update changes made to the first DataTable back to the data source. CheckRefreshDataSet( ) This method is called ... and a timer. The sample code contains two event handlers and one method: Form.Load Sets up the sample by creating a DataTable containing the Categories table from the Northwind database. ... Team LiB ] Recipe 9.14 Refreshing a DataSet Automatically Using Extended Properties Problem You need to automatically refresh a DataSet periodically. Solution Use extended properties and...

Ngày tải lên: 14/12/2013, 18:16

... your XmlDataDocument, then that customer is also added as a DataRow to your associated DataSet. Similarly, if you add a new customer as a DataRow to your DataSet, then that customer is also added ... BY CustomerID"; SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(); mySqlDataAdapter.SelectCommand = mySqlCommand; // step 1: create a DataSet object and fill it with the top 2 ... the ANATR DataRow using GetRowFromElement(). This method accepts an XmlElement as a parameter and returns the associated DataRow. 10. Removes the ANATR node using RemoveAll(). 11. Display the...

Ngày tải lên: 14/12/2013, 22:15

... NodeChanging XmlNodeChangedEventHandler Fires before a value in a node is changed. NodeChanged XmlNodeChangedEventHandler Fires after a value in a node is changed. NodeInserting XmlNodeChangedEventHandler ... BY CustomerID"; SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(); mySqlDataAdapter.SelectCommand = mySqlCommand; // step 1: create a DataSet object and fill it with the top 2 ... CreateNavigator() XpathNavigator Creates an XpathNavigator object that you can use to navigate the XML document. CreateNode() XmlNode Overloaded. Creates an XmlNode object. CreateTextNode() XmlText...

Ngày tải lên: 14/12/2013, 22:15

... time. Instead, a better approach is to connect to the database, fetch the data into a DataSet object, and then disconnect again. The user can browse the data in the DataSet and make any changes ... in applications. You can modify the data in the DataSet, and later reopen the connection and send the changes back to the database. You can manually open a connection to a database by creating ... it again. The DataSet in this case is referred to as a disconnected DataSet as it doesn't maintain an active connection to the database. Disconnected DataSet objects act as a data cache...

Ngày tải lên: 15/12/2013, 00:15

... You can push these changes to the database using the following example: mySqlDataAdapter.Update(myDataSet); All your changes to myDataSet are pushed to the database as part of the transaction ... Each of the Command objects in mySqlDataAdapter will now use mySqlTransaction. Let's say you added, modified, and removed some rows from a DataTable contained in a DataSet named myDataSet. ... in mySqlTransaction. You can commit those changes using the Commit() method of mySqlTransaction: mySqlTransaction.Commit(); You could also roll back those changes using the Rollback() method...

Ngày tải lên: 24/12/2013, 01:17

... Team LiB ] Recipe 8.2 Saving and Loading a DataSet from XML Problem You need to save a DataSet as an XML file and create a DataSet from an XML file. Solution Use the XmlTextWriter and XmlTextReader ... tables. The XML schema and data for the DataSet is written both to a file and to a text box on the form. Read Button.Click Creates a DataSet and reads in schema and data from a file containing ... 8.1 and the MSDN Library. The WriteXml( ) and ReadXml( ) methods of the DataSet are used to write and read the XML for the DataSet. The WriteXml( ) method takes an optional argument that specifies...

Ngày tải lên: 24/12/2013, 05:15

... form, and add code to your form to fill it using the Fill() method of a DataAdapter object. • Click the Generate Dataset link at the bottom of the Properties window of your DataAdapter. You can ... You'll use the second step, so go ahead and click the Generate Dataset link. The Generate Dataset dialog box is then displayed, as shown in Figure 10.14 . Figure 10.14: The Generate Dataset ... Creating a DataSet Object Using Visual Studio .NET In this section, you'll learn how to create a DataSet using Visual Studio .NET. N ote You'll find a completed VS .NET example...

Ngày tải lên: 21/01/2014, 07:20

Ngày tải lên: 26/01/2014, 10:20