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INSERT NEW DATA INTO A DATABASE in .NET Insert PDF417 in .NET INSERT NEW DATA INTO A DATABASE




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5.1 INSERT NEW DATA INTO A DATABASE using barcode implement for .net framework control to generate, create barcode pdf417 image in .net framework applications. Java Projects There are many differ barcode pdf417 for .NET ent ways to insert new data into a database in Visual Studio.NET.

Regularly, however, three methods are widely utilized: 1. Using TableAdapter s DBDirect methods, speci cally the TableAdapter. Insert() method 2.

Using TableAdapter s Update() method to insert new records that have already been added to the DataTable in the DataSet 3. Using the Command object combined with the ExecuteNonQuery() method When using method 1, one can directly access the database and execute commands such as TableAdapter.Insert(), TableAdapter.

Update(), and TableAdapter.. 5.1 Insert New Data into a Database Delete() to manipulat Visual Studio .NET PDF 417 e data in the database without requiring DataSet or DataTable objects to reconcile changes in order to send updates to a database. As we mentioned at the beginning of this chapter, inserting data into a table in the DataSet is different from inserting data into a table in the database.

If you are using the DataSet to store data in your applications, you need to use the TableAdapter. Update() method since the Update() method can trigger and send all changes (updates, insertions, and deletions) to the database. A good habit is to try to use the TableAdapter.

Insert() method when your application uses objects to store data (for example, you are using TextBox to store your data) or when you want ner control over creating new records in the database. In addition to inserting data into the database, method 2 can be used for other data operations such as updating and deleting data from the database. You can build associated command objects and assign them to the appropriate TableAdapter properties such as UpdateCommand and DeleteCommand.

The point is that when these properties are executed, data manipulations occur only in the data table in the DataSet, not in the database. In order to make those data modi cations occur in the real database, TableAdapter s Update() method is needed to send to the database. The terminal execution of inserting, updating, and deleting data of both methods 1 and 2 is performed by method 3.

In other words, both methods 1 and 2 need method 3 to complete the data manipulations, which means that both methods need to execute the Command object, or more precisely, the ExecuteNonQuery() method of the Command object, to nish these data operations on the database. Because methods 1 and 2 are relatively simple, in this part we will concentrate on inserting data into the database using TableAdapter methods. First, we will discuss how to insert new records directly into the database using the TableAdapter.

Insert() method, and then we will see how to insert new records into the DataSet and then into a database using the TableAdapter.Update() method. Method 3 will be discussed in Part II since it contains more completed coding related to runtime objects.

. 5.1.1 Insert New Records into a Database Using the TableAdapter.Insert Method When you use this Tab .net framework pdf417 leAdapter DBDirect method to perform data manipulations on a database, the main query must provide enough information for the DBDirect methods to be created correctly. The so-called main query is the default or original query method, such as Fill() or GetData(), when you rst open any TableAdapter by using the TableAdapter Con guration Wizard.

Enough information means that the data table must contain complete de nitions. For example, if a TableAdapter is con gured to query data from a table that does not have a primary key column de ned, it does not generate DBDirect methods. Table 5.

1 lists three TableAdapter DBDirect methods. It can be found from Table 5.1 that the TableAdapter.

Update() method has two functionalities: one is to directly make all changes in the database based on the parameters contained in the Update() method, and another is to update all changes made in the DataSet to the database based on the associated properties.
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