DataReaderExtensions.IsDBNull(DbDataReader, String) Method

Reference

Definition

Namespace:: System.Data

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

Assembly:: System.Data.Common.dll

Assembly:: netstandard.dll

Source:: DataReaderExtensions.cs

Source:: DataReaderExtensions.cs

Source:: DataReaderExtensions.cs

Important

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

public:
[System::Runtime::CompilerServices::Extension]
 static bool IsDBNull(System::Data::Common::DbDataReader ^ reader, System::String ^ name);

public static bool IsDBNull(this System.Data.Common.DbDataReader reader, string name);

static member IsDBNull : System.Data.Common.DbDataReader * string -> bool

<Extension()>
Public Function IsDBNull (reader As DbDataReader, name As String) As Boolean

Parameters

reader: DbDataReader

The data reader to get the column value from.

name: String

The name of the column.

Returns

Boolean

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

Exceptions

IndexOutOfRangeException

The name specified is not a valid column name.

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

Product	Versions
.NET	Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Standard	2.1

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