DataColumn Constructor ( String, Type )

Inititalizes a new instance of the DataColumn class using the specified column name and data type.

[ VB ]
Overloads Public Sub New ( _
   ByVal columnName As String, _
   ByVal dataType As Type _
)

[ C# ]
public DataColumn (
   string columnName,
   Type dataType
);

[ C++ ]
public: DataColumn (
   String* columnName,
   Type* dataType
);

[ JScript ]
public function DataColumn (
   columnName : String,
   dataType : Type
);

columnName: A string that represents the name of the column to be created. If set to a null reference or an empty string ( "" ), a default name will be given when added to the columns collection.
dataType: A supported DataType.

Exception Type	Condition
ArgumentNullException	Occurs when no dataType is specified.

The following example initializes a new DataColumn with a specified ColumnName and DataType.

private void AddDataColumn ( ) {
   System.Type dtype = new System.Type.GetType ( "System.Int32" );
   DataColumn myColumn = new DataColumn ( "id", dtype );
   // set various properties.

   myColumn.Unique = true;
   myColumn.AutoIncrement = true;
   myColumn.AutoIncrementSeed = 1;
   myColumn.AutoIncrementStep = 1;
   myColumn.ReadOnly = true;

   // add to Columns collection.
   myTable.Columns.Add ( myColumn );
}

Private Sub AddDataColumn ( )
   Dim dtype As New System.Type.GetType ( "System.Int32" )
   Dim myColumn As New DataColumn ( "id", dtype )
   ' set various properties.
   With myColumn
      .Unique = True
      .AutoIncrement = True
      .AutoIncrementSeed = 1
      .AutoIncrementStep = 1
      .ReadOnly = True
    End With
   ' add to Columns collection.
   myTable.Columns.Add ( myColumn )
End Sub

DataColumn Members DataColumn Constructor Overload List DefaultValue ColumnName Caption DataTable DataType

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DataColumn Constructor ( String, Type )

Parameters

Exceptions

Example

See Also