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DataColumn Constructor (String, Type, String)

Initializes a new instance of the DataColumn class using the specified name, data type, and expression.

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

public:
DataColumn(
	String^ columnName, 
	Type^ dataType, 
	String^ expr
)

Parameters

columnName
Type: System::String
A string that represents the name of the column to be created. If set to nullptr or an empty string (""), a default name will be specified when added to the columns collection.
dataType
Type: System::Type
A supported DataType.
expr
Type: System::String
The expression used to create this column. For more information, see the Expression property.

ExceptionCondition
ArgumentNullException

No dataType was specified.

The following example creates a computed column.

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

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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