string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\path\\to\\your\\database.accdb";string query = "SELECT * FROM Customers";OleDbConnection connection = new OleDbConnection(connectionString);OleDbDataAdapter adapter = new OleDbDataAdapter(query, connection);DataSet dataSet = new DataSet();adapter.Fill(dataSet, "Customers");ReportDataSource reportDataSource = new ReportDataSource("Customers", dataSet.Tables[0]);reportViewer1.LocalReport.DataSources.Clear();reportViewer1.LocalReport.DataSources.Add(reportDataSource);reportViewer1.RefreshReport();
string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\path\\to\\your\\database.accdb";
string query = "SELECT * FROM Customers";
OleDbConnection connection = new OleDbConnection(connectionString);
OleDbDataAdapter adapter = new OleDbDataAdapter(query, connection);
DataSet dataSet = new DataSet();
adapter.Fill(dataSet, "Customers");
ReportDataSource reportDataSource = new ReportDataSource("Customers", dataSet.Tables[0]);
reportViewer1.LocalReport.DataSources.Clear();
reportViewer1.LocalReport.DataSources.Add(reportDataSource);
reportViewer1.RefreshReport();
What is the purpose of the above code?A) To retrieve data from a Microsoft Access database and display it in a report viewer.B) To retrieve data from a MySQL database and display it in a report viewer.C) To retrieve data from a SQL Server database and display it in a report viewer.D) To retrieve data from a PostgreSQL database and display it in a report viewer.
A) To retrieve data from a Microsoft Access database and display it in a report viewer.
The code is creating a connection to a Microsoft Access database using an OleDbConnection object and a connection string. It is then using an OleDbDataAdapter to execute a SELECT query on the Customers table in the database and fill a DataSet object with the results. It is creating a ReportDataSource object using the DataSet and setting it as the data source for a report viewer control. This will display the data from the Customers table in the report viewer.