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ADO.NET SqlDataReader Class
This class is used to read data from SQL Server database. It reads data in forward-only stream of rows from a SQL Server database. it is sealed class so that cannot be inherited. It inherits DbDataReader class and implements IDisposable interface.
SqlDataReader Signature
SqlDataReader Properties
| Property | Description |
|---|---|
| Connection | It is used to get the SqlConnection associated with the SqlDataReader. |
| Depth | It is used to get a value that indicates the depth of nesting for the current row. |
| FieldCount | It is used to get the number of columns in the current row. |
| HasRows | It is used to get a value that indicates whether the SqlDataReader contains one or more rows. |
| IsClosed | It is used to retrieve a boolean value that indicates whether the specified SqlDataReader instance has been closed. |
| Item[String] | It is used to get the value of the specified column in its native format given the column name. |
| Item[Int32] | It is used to get the value of the specified column in its native format given the column ordinal. |
| RecordsAffected | It is used to get the number of rows changed, inserted or deleted by execution of the Transact-SQL statement. |
| VisibleFieldCount | It is used to get the number of fields in the SqlDataReader that are not hidden. |
Methods
| Method | Description |
|---|---|
| Close() | It is used to closes the SqlDataReader object. |
| GetBoolean(Int32) | It is used to get the value of the specified column as a Boolean. |
| GetByte(Int32) | It is used to get the value of the specified column as a byte. |
| GetChar(Int32) | It is used to get the value of the specified column as a single character. |
| GetDateTime(Int32) | It is used to get the value of the specified column as a DateTime object. |
| GetDecimal(Int32) | It is used to get the value of the specified column as a Decimal object. |
| GetDouble(Int32) | It is used to get the value of the specified column as a double-precision floating point number. |
| GetFloat(Int32) | It is used to get the value of the specified column as a single-precision floating point number. |
| GetName(Int32) | It is used to get the name of the specified column. |
| GetSchemaTable() | It is used to get a DataTable that describes the column metadata of the SqlDataReader. |
| GetValue(Int32) | It is used to get the value of the specified column in its native format. |
| GetValues(Object[]) | It is used to populate an array of objects with the column values of the current row. |
| NextResult() | It is used to get the next result, when reading the results of SQL statements. |
| Read() | It is used to read record from the SQL Server database. |
To create a SqlDataReader instance, we must call the ExecuteReader method of the SqlCommand object.
Example
In the following program, we are using SqlDataReader to get data from the SQL Server. A C# code is given below.
// Program.cs
Output:
Execute this program by combination of Ctrl+F5 and it will produce the following output.
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