What is DataAdapter and its property?
The DataAdapter serves as a bridge between a DataSet and a data source for retrieving and saving data. The DataAdapter provides this bridge by mapping Fill, which changes the data in the DataSet to match the data in the data source, and Update, which changes the data in the data source to match the data in the DataSet.
What is DataAdapter Where is it used?
A DataAdapter is used to retrieve data from a data source and populate tables within a DataSet. The DataAdapter also resolves changes made to the DataSet back to the data source. The DataAdapter uses the Connection object of the .
Which method of a DataAdapter is used to populate a DataSet?
Fill method
The Fill method of the DataAdapter is used to populate a DataSet with the results of the SelectCommand of the DataAdapter . Fill takes as its arguments a DataSet to be populated, and a DataTable object, or the name of the DataTable to be filled with the rows returned from the SelectCommand .
What is the difference between DataAdapter & DataReader?
DataAdapter is an intermediate layer/ middleware which acts a bridge between the DataSet and a Database whereas DataReader provides forward-only, read-only access to data using a server-side cursor (simply put it is ued to read the data).
What are the types of DataAdapter?
The DataAdapter works as a bridge between a DataSet and a data source to retrieve data. DataAdapter is a class that represents a set of SQL commands and a database connection. It can be used to fill the DataSet and update the data source.
Which is better DataReader or DataAdapter?
Using the DataReader can increase application performance both by retrieving data as soon as it is available, and (by default) storing only one row at a time in memory, reducing system overhead. A DataAdapter is used to retrieve data from a data source and populate tables within a DataSet.
Which one is the DataAdapter object?
DataAdapter is a part of the ADO.NET Data Provider. DataAdapter provides the communication between the Dataset and the Datasource. We can use the DataAdapter in combination with the DataSet Object. That is these two objects combine to enable both data access and data manipulation capabilities.
What are the three basic methods of DataAdapter?
Explain the basic methods of Dataadapter. Fill : adds or updates the rows to dataset from the datasource. FillSchema : adds a datatable with the same schema as in the datasource. Update : it calls insert, update, delete sql commands for transferring all the changes from the dataset to the datasource.
Which is faster DataReader or DataAdapter?
A SqlDataAdapter is typically used to fill a DataSet or DataTable and so you will have access to the data after your connection has been closed (disconnected access). The SqlDataReader is a fast forward-only and connected cursor which tends to be generally quicker than filling a DataSet/DataTable.
Which is the DataAdapter object?
Which is faster SQlDataAdapter and SqlDataReader?
What are the methods of the DataAdapter class?
TheDataSetCommand.UpdateCommand.CommandText = “UPDATE Orders SET ZipCode = ‘34956’ WHERE OrderNum = 14”; The DataAdapter class provides many useful methods. For instance, the FILL method of the DataAdapter fills data from a data adapter to the DataSet object, and the Update method stores data from a DataSet object to the data source.
What are data adapter properties and methods in ADO.NET?
This article has been excerpted from book “A Programmer’s Guide to ADO.NET in C#”. As you start working data adapters, you need take a Quick looks at data adapter properties and methods. The DataAdapter has properties of type Command, which represent the ways it can query, insert, delete, and update the database.
What does the DataAdapter do in VB.NET?
The DataAdapter serves as a bridge between a DataSet and a data source for retrieving and saving data. The DataAdapter provides this bridge by mapping Fill, which changes the data in the DataSet to match the data in the data source, and Update, which changes the data in the data source to match the data in the DataSet.
How does the DataAdapter bridge the data source?
The DataAdapter provides this bridge by mapping Fill, which changes the data in the DataSet to match the data in the data source, and Update, which changes the data in the data source to match the data in the DataSet.
