IsDBNull Method

DbDataReader.IsDBNull Method (Int32)


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


Type: System.Int32

The zero-based column ordinal.

Return Value

Type: System.Boolean

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

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.

Universal Windows Platform
Available since 10
.NET Framework
Available since 2.0
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