DataTableReader::IsDBNull Method
Gets a value that indicates whether the column contains non-existent or missing values.
Assembly: System.Data (in System.Data.dll)
Parameters
- ordinal
- Type: System::Int32
The zero-based column ordinal
Return Value
Type: System::Booleantrue if the specified column value is equivalent to DBNull; otherwise, false.
Implements
IDataRecord::IsDBNull(Int32)| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException | The index passed was outside the range of 0 to FieldCount - 1. |
| DeletedRowInaccessibleException | An attempt was made to retrieve data from a deleted row. |
| InvalidOperationException | An attempt was made to read or access a column in a closed DataTableReader . |
The following example displays the contents of the column numbered 2 within the passed-in DataTableReader. If the value the column within a particular row is null, the code displays the text <NULL>. If the data within the column of the correct type, the example displays an error message for each row.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.