DbDataReader.IsDBNull(Int32) Method
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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);C#
public abstract bool IsDBNull(int ordinal);abstract member IsDBNull : int -> boolPublic MustOverride Function IsDBNull (ordinal As Integer) As Boolean- ordinal
- Int32
The zero-based column ordinal.
true if the specified column is equivalent to DBNull; otherwise, false.
The column index is out of range.
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.
| Product | Versions |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
| UWP | 10.0 |
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