| CqlReader Class |
Reads a forward-only stream of rows from Cassandra.
Inheritance HierarchySystemObject
SystemMarshalByRefObject
System.Data.CommonDbDataReader
Cassandra.DataCqlReader
SystemMarshalByRefObject
System.Data.CommonDbDataReader
Cassandra.DataCqlReader
Namespace: Cassandra.Data
Assembly: Cassandra (in Cassandra.dll) Version: 3.2.0
SyntaxC#
public class CqlReader : DbDataReader
The CqlReader type exposes the following members.
Methods| Name | Description | |
|---|---|---|
 | Close | (Overrides DbDataReaderClose.) |
| CreateObjRef | Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject.) |
| Dispose | Releases all resources used by the current instance of the DbDataReader class. (Inherited from DbDataReader.) |
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| GetBoolean | Gets the value of the specified column as a Boolean. (Overrides DbDataReaderGetBoolean(Int32).) |
| GetByte | Gets the value of the specified column as a byte. (Overrides DbDataReaderGetByte(Int32).) |
| GetBytes | Reads a stream of bytes from the specified column, starting at location indicated by dataOffset, into the buffer, starting at the location indicated by bufferOffset. (Overrides DbDataReaderGetBytes(Int32, Int64, Byte, Int32, Int32).) |
| GetChar | Gets the value of the specified column as a single character. (Overrides DbDataReaderGetChar(Int32).) |
| GetChars | Reads a stream of characters from the specified column, starting at location indicated by dataOffset, into the buffer, starting at the location indicated by bufferOffset. (Overrides DbDataReaderGetChars(Int32, Int64, Char, Int32, Int32).) |
| GetData | Returns a DbDataReader object for the requested column ordinal. (Inherited from DbDataReader.) |
| GetDataTypeName | Gets name of the data type of the specified column. (Overrides DbDataReaderGetDataTypeName(Int32).) |
| GetDateTime | Gets the value of the specified column as a DateTime object. (Overrides DbDataReaderGetDateTime(Int32).) |
| GetDecimal | Gets the value of the specified column as a Decimal object. (Overrides DbDataReaderGetDecimal(Int32).) |
| GetDouble | Gets the value of the specified column as a double-precision floating point number. (Overrides DbDataReaderGetDouble(Int32).) |
| GetEnumerator | (Overrides DbDataReaderGetEnumerator.) |
| GetFieldType | Gets the data type of the specified column. (Overrides DbDataReaderGetFieldType(Int32).) |
| GetFieldValueT | Synchronously gets the value of the specified column as a type. (Inherited from DbDataReader.) |
| GetFieldValueAsyncT(Int32) | Asynchronously gets the value of the specified column as a type. (Inherited from DbDataReader.) |
| GetFieldValueAsyncT(Int32, CancellationToken) | Asynchronously gets the value of the specified column as a type. (Inherited from DbDataReader.) |
| GetFloat | Gets the value of the specified column as a single-precision floating point number. (Overrides DbDataReaderGetFloat(Int32).) |
| GetGuid | Gets the value of the specified column as a globally-unique identifier (GUID). (Overrides DbDataReaderGetGuid(Int32).) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetInt16 | Gets the value of the specified column as a 16-bit signed integer. (Overrides DbDataReaderGetInt16(Int32).) |
| GetInt32 | Gets the value of the specified column as a 32-bit signed integer. (Overrides DbDataReaderGetInt32(Int32).) |
| GetInt64 | Gets the value of the specified column as a 64-bit signed integer. (Overrides DbDataReaderGetInt64(Int32).) |
| GetLifetimeService | Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject.) |
| GetName | Gets the name of the column, given the zero-based column ordinal. (Overrides DbDataReaderGetName(Int32).) |
| GetOrdinal | Gets the column ordinal given the name of the column. (Overrides DbDataReaderGetOrdinal(String).) |
| GetProviderSpecificFieldType | Returns the provider-specific field type of the specified column. (Inherited from DbDataReader.) |
| GetProviderSpecificValue | Gets the value of the specified column as an instance of Object. (Inherited from DbDataReader.) |
| GetProviderSpecificValues | Gets all provider-specific attribute columns in the collection for the current row. (Inherited from DbDataReader.) |
| GetSchemaTable | (Overrides DbDataReaderGetSchemaTable.) |
| GetStream | Retrieves data as a Stream. (Inherited from DbDataReader.) |
| GetString | (Overrides DbDataReaderGetString(Int32).) |
| GetTextReader | Retrieves data as a TextReader. (Inherited from DbDataReader.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| GetValue | Gets the value of the specified column as an instance of Object. (Overrides DbDataReaderGetValue(Int32).) |
| GetValues | Populates an array of objects with the column values of the current row. (Overrides DbDataReaderGetValues(Object).) |
| InitializeLifetimeService | Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject.) |
| IsDBNull | Gets a value that indicates whether the column contains nonexistent or missing values. (Overrides DbDataReaderIsDBNull(Int32).) |
| IsDBNullAsync(Int32) | An asynchronous version of IsDBNull(Int32), which gets a value that indicates whether the column contains non-existent or missing values. (Inherited from DbDataReader.) |
| IsDBNullAsync(Int32, CancellationToken) | An asynchronous version of IsDBNull(Int32), which gets a value that indicates whether the column contains non-existent or missing values. Optionally, sends a notification that operations should be cancelled. (Inherited from DbDataReader.) |
| NextResult | Advances the reader to the next result when reading the results of a batch of statements. (Overrides DbDataReaderNextResult.) |
| NextResultAsync | An asynchronous version of NextResult, which advances the reader to the next result when reading the results of a batch of statements.Invokes NextResultAsync(CancellationToken) with CancellationToken.None. (Inherited from DbDataReader.) |
| NextResultAsync(CancellationToken) | This is the asynchronous version of NextResult. Providers should override with an appropriate implementation. The cancellationToken may optionally be ignored.The default implementation invokes the synchronous NextResult method and returns a completed task, blocking the calling thread. The default implementation will return a cancelled task if passed an already cancelled cancellationToken. Exceptions thrown by NextResult will be communicated via the returned Task Exception property.Other methods and properties of the DbDataReader object should not be invoked while the returned Task is not yet completed. (Inherited from DbDataReader.) |
| Read | Advances the reader to the next record in a result set. (Overrides DbDataReaderRead.) |
| ReadAsync | An asynchronous version of Read, which advances the reader to the next record in a result set. This method invokes ReadAsync(CancellationToken) with CancellationToken.None. (Inherited from DbDataReader.) |
| ReadAsync(CancellationToken) | This is the asynchronous version of Read. Providers should override with an appropriate implementation. The cancellationToken may optionally be ignored.The default implementation invokes the synchronous Read method and returns a completed task, blocking the calling thread. The default implementation will return a cancelled task if passed an already cancelled cancellationToken. Exceptions thrown by Read will be communicated via the returned Task Exception property.Do not invoke other methods and properties of the DbDataReader object until the returned Task is complete. (Inherited from DbDataReader.) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
Properties| Name | Description | |
|---|---|---|
 | Depth | (Overrides DbDataReaderDepth.) |
| FieldCount | Gets the number of columns in the current row. (Overrides DbDataReaderFieldCount.) |
| HasRows | (Overrides DbDataReaderHasRows.) |
| IsClosed | (Overrides DbDataReaderIsClosed.) |
| ItemInt32 | (Overrides DbDataReaderItemInt32.) |
| ItemString | (Overrides DbDataReaderItemString.) |
| RecordsAffected | (Overrides DbDataReaderRecordsAffected.) |
| VisibleFieldCount | Gets the number of fields in the DbDataReader that are not hidden. (Inherited from DbDataReader.) |
See Also