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)

new : 
        columnName:string *
        dataType:Type *
        expr:string -> DataColumn

Parameters

columnName
Type: System.String

A string that represents the name of the column to be created. If set to null 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.

Exception Condition
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
Available since 1.1
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