本文整理匯總了VB.NET中System.Data.DataColumn.DataColumn構造函數的典型用法代碼示例。如果您正苦於以下問題:VB.NET DataColumn構造函數的具體用法?VB.NET DataColumn怎麽用?VB.NET DataColumn使用的例子?那麽, 這裏精選的構造函數代碼示例或許可以為您提供幫助。您也可以進一步了解該構造函數所在類System.Data.DataColumn
的用法示例。
在下文中一共展示了DataColumn構造函數的5個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: AddDataColumn
Private Sub AddDataColumn(ByVal table As DataTable)
Dim column As New DataColumn()
' Set various properties.
With column
.ColumnName = "id"
.DataType = System.Type.GetType("System.Int32")
.AutoIncrement = True
.AutoIncrementSeed = 1
.AutoIncrementStep = 1
.ReadOnly = True
End With
' Add to Columns collection.
table.Columns.Add(column)
End Sub
示例2: AddDataColumn
Private Sub AddDataColumn(ByVal table As DataTable)
Dim column As DataColumn
column = New DataColumn("id")
' Set various properties.
With column
.DataType = System.Type.GetType("System.Int32")
.AutoIncrement = True
.AutoIncrementSeed = 1
.AutoIncrementStep = 1
.ReadOnly = True
End With
' Add to Columns collection.
table.Columns.Add(column)
End Sub
示例3: AddDataColumn
Private Sub AddDataColumn(ByVal table As DataTable)
Dim typeInt32 As System.Type = _
System.Type.GetType("System.Int32")
Dim column As DataColumn = _
New DataColumn("id", typeInt32)
' Set various properties.
With column
.AutoIncrement = True
.AutoIncrementSeed = 1
.AutoIncrementStep = 1
.ReadOnly = True
End With
' Add to Columns collection.
table.Columns.Add(column)
End Sub
示例4: AddDataColumn
Private Sub AddDataColumn(ByVal table As DataTable)
Dim column As DataColumn
Dim decimalType As System.Type
decimalType = System.Type.GetType("System.Decimal")
column = New DataColumn("Tax", decimalType, "UnitPrice * .0862")
' Set various properties.
With column
.AutoIncrement = False
.ReadOnly = True
End With
' Add to Columns collection.
table.Columns.Add(column)
End Sub
示例5: CreateComputedColumn
Private Sub CreateComputedColumn(ByVal table As DataTable)
Dim column As DataColumn
Dim decimalType As System.Type = _
System.Type.GetType("System.Decimal")
' The expression multiplies the "Price" column value by the
' "Quantity" to create the "Total" column.
Dim expression As String = "Price * Quantity"
' Create the column, setting the type to Attribute.
column = New DataColumn("Total", decimalType, _
expression, MappingType.Attribute)
' Set various properties.
column.AutoIncrement = False
column.ReadOnly = True
' Add the column to a DataTable object's DataColumnCollection.
DataSet1.Tables("OrderDetails").Columns.Add(column)
End Sub