Tài liệu Using the Shape Language to Retrieve Hierarchical Data doc

... 3.14 Using the Shape Language to Retrieve Hierarchical Data Problem You want to use the Shape language with ADO.NET to retrieve hierarchical data from a SQL Server. Solution Execute the SHAPE ... shown in the following example using the OLE DB provider. The sample code defines a SHAPE query to retrieve the TOP 5 Orders from Northwind...

Ngày tải lên: 24/12/2013, 05:15

... Using the Get* Methods to Read Column Values Before I show you the other Get* methods that read column values, you need to know the standard C# types and the values they support. You need to ... 2 16 - 1 (65,535). Note The standard C# types are defined in the System namespace. Table 9.4 shows the SQL Server types, the compatible standard C# types, and the Data...

Ngày tải lên: 24/12/2013, 01:17

... script is similar to the ActionScript we added in the preceding step. However, here the if statement reacts to the Up and Down Arrow keys rather than the Right and Left Arrow keys. The first part ... whether the Tab key is currently pressed down. It returns a result of either true or false. The parameter of the isDown() method can reference either a specific key in...

Ngày tải lên: 21/01/2014, 13:20

... for the XmlDocument class. The DataSet property (type DataSet) is the property added to the XmlDataDocument class. It gets the DataSet object, which stored the relational representation of the ... data. You associate a DataSet with your XmlDataDocument by passing the DataSet to the XmlDataDocument constructor. Table 16.8 shows the additional XmlDataDocument methods...

Ngày tải lên: 14/12/2013, 22:15

... Using an XmlDocument Object to Store an XML Document You use an object of the XmlDocument class to represent an XML document in a C# program. An XmlDocument object stores the nodes of the ... XML document. You can then use the output string from GetXml() as the input to the LoadXml() method of myXmlDocument; this loads myXmlDocument with the XML document containing...

Ngày tải lên: 14/12/2013, 22:15

... Choosing the data connection 7. Click the Next button to continue. 8. You now log in to the database by specifying the password for the database user. You used the sa user when creating the database ... shows the completed form up and running. Notice that the top part of the form shows the details for the row from the Customers table where the CustomerID...

Ngày tải lên: 24/12/2013, 01:17

... editCustomerID is bound to the CustomerID column of the Customers table. This means that when you run the form and load data from the database, the CustomerID column value will be displayed in the ... All The Cancel All button allows you to undo any changes you've made to the current row. o Add The Add button allows you to add a new row. o Delete The...

Ngày tải lên: 24/12/2013, 01:17

... information message produced by the database. You use the InfoMessage event to monitor these messages. To get the message, you read the contents of the Errors collection from the SqlInfoMessageEventArgs ... you can see, the time to open the first connection is relatively long compared with the subsequent ones. This is because the first connection makes the actu...

Ngày tải lên: 14/12/2013, 13:15

... Unspecified. Within the transaction, a DataTable is filled with the Orders table from the Northwind database. The default view of the table is bound to the data grid on the form. Cancel Button.Click ... committed, by another transaction. The first transaction makes more changes to the data or rolls back the changes already made resulting in the second tran...

Ngày tải lên: 14/12/2013, 18:16

... Using the Connection Object As with ADO.NET, you will be using the Connection object to set up a connection to the database of your choice. As you get started looking at the different ... Listing A.3 provides two other examples of using the connection object, also found in basConnectionExamples.vb. The first is code to open a connection to a Jet database by usi...

Ngày tải lên: 14/12/2013, 20:16