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DataTableReader::GetGuid Method (Int32)

.NET Framework (current version)

Other Versions

Gets the value of the specified column as a globally-unique identifier (GUID).

Namespace: System.Data
Assembly: System.Data (in System.Data.dll)

Syntax

C++

public:
virtual Guid GetGuid(
	int ordinal
) override

Parameters

ordinal: Type: System::Int32
The zero-based column ordinal.

Return Value

Type: System::Guid

The value of the specified column.

Implements

IDataRecord::GetGuid(Int32)

Exceptions

Exception	Condition
ArgumentOutOfRangeException	The index passed was outside the range of 0 to FieldCount - 1.
DeletedRowInaccessibleException	An attempt was made to retrieve data from a deleted row.
InvalidOperationException	An attempt was made to read or access a column in a closed DataTableReader.
InvalidCastException	The specified column does not contain a GUID.

Remarks

No conversions are performed; therefore the data retrieved must already be a Guid or coercible to a Guid.

Call IsDBNull to see if there are null values before calling this method.

The following example displays the contents of the column numbered 2 within the passed-in DataTableReader. If the value the column within a particular row is null, the code displays the text <NULL>. If the data within the column is not of the correct type, the example displays an error message for each row.

C++

No code example is currently available or this language may not be supported.

Version Information

.NET Framework
Available since 2.0

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