DbDataReader.IsDBNull(Int32) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
When overridden in a derived class, gets a value that indicates whether the column contains nonexistent or missing values.
public:
abstract bool IsDBNull(int ordinal);
public abstract bool IsDBNull (int ordinal);
abstract member IsDBNull : int -> bool
Public MustOverride Function IsDBNull (ordinal As Integer) As Boolean
Parameters
- ordinal
- Int32
The zero-based column ordinal.
Returns
true
if the specified column is equivalent to DBNull; otherwise, false
.
Implements
Exceptions
The column index is out of range.
Remarks
Call this method to check for null column values before calling the typed Get_*_ methods (for example, GetByte, GetChar, and so on) to avoid throwing an exception.
Applies to
See also
Atsauksmes
https://aka.ms/ContentUserFeedback.
Drīzumā: 2024. gada laikā mēs pakāpeniski pārtrauksim izmantot “GitHub problēmas” kā atsauksmju par saturu mehānismu un aizstāsim to ar jaunu atsauksmju sistēmu. Papildinformāciju skatiet:Iesniegt un skatīt atsauksmes par