DataReaderExtensions.IsDBNull(DbDataReader, String) Method
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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
- reader
- DbDataReader
The data reader to get the column value from.
- name
- String
The name of the column.
true
if the specified column is equivalent to DBNull; otherwise, false
.
The name specified is not a valid column name.
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.
Product | Versions |
---|---|
.NET | Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Standard | 2.1 |
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