DbDataReader.IsDBNull(Int32) Method
Definition
Important
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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 -> boolPublic MustOverride Function IsDBNull (ordinal As Integer) As BooleanParameters
- 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
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