DbDataReader.IsDBNull(Int32) Method

Reference

Definition

Namespace:: System.Data.Common

Assembly:: System.Data.Common.dll

Assembly:: System.Data.dll

Assembly:: netstandard.dll

Source:: DbDataReader.cs

Source:: DbDataReader.cs

Source:: DbDataReader.cs

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 -> bool

Public MustOverride Function IsDBNull (ordinal As Integer) As Boolean

Parameters

ordinal: Int32

The zero-based column ordinal.

Returns

Boolean

true if the specified column is equivalent to DBNull; otherwise, false.

Implements

IsDBNull(Int32)

Exceptions

IndexOutOfRangeException

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

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