DataReaderExtensions.IsDBNull(DbDataReader, String) Method
Definition
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 BooleanParameters
- reader
- DbDataReader
The data reader to get the column value from.
- name
- String
The name of the column.
Returns
true if the specified column is equivalent to DBNull; otherwise, false.
Exceptions
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
See also
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