DbDataRecord.IsDBNull(Int32) Method

Reference

Definition

Namespace:: System.Data.Common

Assemblies:: netstandard.dll, System.Data.Common.dll

Assembly:: System.Data.Common.dll

Assembly:: System.Data.dll

Assembly:: netstandard.dll

Source:: DbDataRecord.cs

Source:: DbDataRecord.cs

Source:: DbDataRecord.cs

Important

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Used to indicate nonexistent values.

public:
 abstract bool IsDBNull(int i);

public:
 virtual bool IsDBNull(int i);

public abstract bool IsDBNull(int i);

public bool IsDBNull(int i);

abstract member IsDBNull : int -> bool

abstract member IsDBNull : int -> bool
override this.IsDBNull : int -> bool

Public MustOverride Function IsDBNull (i As Integer) As Boolean

Public Function IsDBNull (i As Integer) As Boolean

Parameters

i: Int32

The column ordinal.

Returns

Boolean

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

Implements

IsDBNull(Int32)

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 raising an error.

Applies to

Продукт	Версії
.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	1.1, 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

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