本文整理汇总了VB.NET中System.Windows.Forms.BindingSource.MoveFirst方法的典型用法代码示例。如果您正苦于以下问题:VB.NET BindingSource.MoveFirst方法的具体用法?VB.NET BindingSource.MoveFirst怎么用?VB.NET BindingSource.MoveFirst使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Windows.Forms.BindingSource 的用法示例。
在下文中一共展示了BindingSource.MoveFirst方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于我们的系统推荐出更棒的VB.NET代码示例。
示例1: Form1_Load
Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) _
Handles Me.Load
' Set the data source to the Brush type and populate
' BindingSource1 with some brushes.
BindingSource1.DataSource = GetType(System.Drawing.Brush)
BindingSource1.Add(New TextureBrush(New Bitmap(GetType(Button), _
"Button.bmp")))
BindingSource1.Add(New HatchBrush(HatchStyle.Cross, Color.Red))
BindingSource1.Add(New SolidBrush(Color.Blue))
End Sub
Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) _
Handles button1.Click
' If you are not at the end of the list, move to the next item
' in the BindingSource.
If BindingSource1.Position + 1 < BindingSource1.Count Then
BindingSource1.MoveNext()
' Otherwise, move back to the first item.
Else
BindingSource1.MoveFirst()
End If
' Force the form to repaint.
Me.Invalidate()
End Sub
Sub Form1_Paint(ByVal sender As Object, ByVal e As PaintEventArgs)
' Get the current item in the BindingSource.
Dim item As Brush = CType(BindingSource1.Current, Brush)
' If the current type is a TextureBrush, fill an ellipse.
If item.GetType().Equals(GetType(TextureBrush)) Then
e.Graphics.FillEllipse(item, _
e.ClipRectangle)
' If the current type is a HatchBrush, fill a triangle.
ElseIf item.GetType().Equals(GetType(HatchBrush)) Then
e.Graphics.FillPolygon(item, New Point() _
{New Point(0, 0), New Point(0, 200), New Point(200, 0)})
' Otherwise, fill a rectangle.
Else
e.Graphics.FillRectangle(item, e.ClipRectangle)
End If
End Sub
开发者ID:VB.NET开发者,项目名称:System.Windows.Forms,代码行数:55,代码来源:BindingSource.MoveFirst
注:本文中的System.Windows.Forms.BindingSource.MoveFirst方法示例整理自Github/MSDocs等源码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。 |
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