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DbDataReader.IsDBNull Method

Gets a value that indicates whether the column contains nonexistent or missing values.

Namespace:  System.Data.Common
Assembly:  System.Data (in System.Data.dll)

public abstract bool IsDBNull(
	int ordinal
)

Parameters

ordinal
Type: System.Int32

The zero-based column ordinal.

Return Value

Type: System.Boolean
true if the specified column is equivalent to DBNull; otherwise false.

Implements

IDataRecord.IsDBNull(Int32)

Call this method to check for null column values before calling the typed get methods (for example, GetByte, GetChar, and so on) to avoid raising an error.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0
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