DataReaderExtensions.IsDBNull(DbDataReader, String) Method

Reference

Definition

Namespace:: System.Data

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

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