Tài liệu Replacing Null Values in a Strongly Typed DataSet ppt

... 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 no value is available. Solution Use annotations in the ... the null Description values are replaced with the string "- no description available -". The annotations are marked in bold in Example 2-25 . Example 2-25....

Ngày tải lên: 14/12/2013, 18:16

... name Annotatio n DataTable TableNameDataTable typedPlural DataTable methods NewTableNameRowAddTableNameRowDeleteTableNa meRow typedName DataRowCollect ion TableName typedPlural DataRow TableNameRow ... typed DataSet and the default names and available annotations for each. Table 2-18. Default values and available annotations for elements of strongly typed DataSet objects...

Ngày tải lên: 24/12/2013, 05:15

... Using a Strongly Typed DataSet In Chapter 10 , you saw how to create and use a strongly typed DataSet class named MyDataSet. You can use objects of this class to represent the Customers table ... table and rows from that table. In this section, you'll see how to modify data using a strongly typed object of the MyDataSet class. Note One of the features of...

Ngày tải lên: 24/12/2013, 01:17

... same code over and over again. I came across the same problem when trying to create PEAR package files—the PPEEAARR__PPaacckkaaggeeFFiilleeMMaannaaggeerr class makes creating PEAR ppaacckkaaggee ... look at adding a maintainer. This is where we get into really wrapping the PPaacckkaaggeeFFiilleeMMaannaaggeerr class into our GTK application. A maintainer is someone who contributes to a...

Ngày tải lên: 17/01/2014, 18:20

... offered a graphical interface that was suitable for Windows applications, VB .NET and Visual Studio .NET aim at providing a graphical interface that is suitable for developing web applications and ... language and a graphical interface design program developed in part by Alan Cooper. Since then, it has become by far the most popular programming language in the world, with an ins...

Ngày tải lên: 09/12/2013, 17:15

... look at adding a maintainer. This is where we get into really wrapping the PPaacckkaaggeeFFiilleeMMaannaaggeerr class into our GTK application. A maintainer is someone who contributes to a PEAR package. ... ddoocc directory that contains rather detailed infor- mation about the package. Thankfully, the package can be used in a straightforward manner. Again, it’s just a matter of...

Ngày tải lên: 11/12/2013, 02:15

... safe and productive manner. • Online courseware and delivery offer many benefits to businesses such as: – Current and accurate training materials. – Availability of training to a wide audience. – ... resources are often called online learning experiences, or e-learning. • Online courses can contain voice, data, and video, and are available to the students at any time from any place. Học...

Ngày tải lên: 12/12/2013, 14:15

... SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(); mySqlDataAdapter.SelectCommand = mySqlCommand; DataSet myDataSet = new DataSet( ); mySqlConnection.Open(); mySqlDataAdapter.Fill(myDataSet, ... Because BSBEV occurs at index 1, the Find() method returns 1. Note DataRowView objects in a DataView start at index 0. Therefore, BSBEV occurs at index 1. Finding DataRowView...

Ngày tải lên: 14/12/2013, 13:15

... version of each row is retrieved by default when accessing rows in a DataTable or in a DataView. The solution demonstrates an approach for getting Deleted rows from both a DataTable and a DataView. ... DataTable, use an overload of the Select( ) method of the DataTable to return an array of deleted DataRow objects. The overload accepts an argument having a DataViewRowState e...

Ngày tải lên: 14/12/2013, 18:16

... missing or nonexistent data, typically in a database, while null and Nothing indicate that an object or variable has not yet been initialized. Passing a null parameter value into a stored procedure ... shown in Example 2-18 , uses a single stored procedure: SP0214_NullParameter Accepts a single parameter and a returns one-row result set containing a single value ind...

Ngày tải lên: 14/12/2013, 18:16