What is DataAdapter explain important it with example?
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….Methods.
| Method | Description |
|---|---|
| Fill(DataSet) | It is used to add rows in the DataSet to match those in the data source. |
What is DataAdapter explain?
Adapters are used to exchange data between a data source and a dataset. In many applications, this means reading data from a database into a dataset, and then writing changed data from the dataset back to the database. However, a data adapter can move data between any source and a dataset.
What is the use of CommandBuilder?
A CommandBuilder object reduces the burden of creating SQL statements for you. In other words, the CommandBuilder helps you to generate update, delete., and insert commands on a single database table for a data adapter. Similar to other objects, each data provider has a command builder class.
What are DataAdapter objects?
DataAdapter is a part of the ADO.NET Data Provider. 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. The DataAdapter can perform Select , Insert , Update and Delete SQL operations in the Data Source.
What is difference between DataAdapter and 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?
Data adapter properties
- Select command retrieves rows from Data Source.
- Insert command writes inserted rows from data set into Data Source.
- Update command writes modified rows from data set into Data Source.
- Delete command deletes rows from Data Source.
What is CommandBuilder in Ado net?
The C# CommandBuilder in ADO.NET helps developers generate update, delete., and insert commands on a single database table for a data adapter. Each data provider has a command builder class.
What is the difference between command and CommandBuilder object?
sqlcommand object executes commands(like select,insert,update statements). sqlcommand object executes commands(like select,insert,update statements).
Why do I need to execute selectcommand in dbcommandbuilder?
The DbCommandBuilder must execute the SelectCommand in order to return the metadata necessary to construct the INSERT, UPDATE, and DELETE SQL commands. As a result, an extra trip to the data source is necessary, and this can hinder performance.
How to create a dim adapter for dbdataadapter?
Dim adapter As DbDataAdapter = _ factory.CreateDataAdapter () adapter.SelectCommand = command ‘ Create the DbCommandBuilder.
How to create a dbdataadapter based on a provider name?
You can then use a DbCommandBuilder to create commands to insert, update, and delete data from a DataSet to a data source. This example demonstrates how to create a strongly typed DbDataAdapter based on a provider name and connection string. The code uses the CreateConnection method of the DbProviderFactory to create a DbConnection.
How to use SQL command builder and SQL data apdater?
SqlCommandBuilder automatically generates INSERT, UPDATE and DELETE sql statements based on the SELECT statement for a single table. For the Transact-SQL statements to be generated using SqlCommandBuilder, there are 2 steps Step 1. Set the “SelectCommand” property of the SqlDataAdapter object Step 2.