想实现在Calendar控件中按日期以Treeview形式动态显示某些内容
Protected Sub calendar1_DayRender(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DayRenderEventArgs) Handles Calendar1.DayRender
........
Dim MyTreeView = New TreeView
Dim mynode = New TreeNode
mynode.Text = "aaaaa"
mynode.Value = "aaaaa"
MyTreeView.Nodes.Add(mynode)
e.Cell.Controls.Add(MyTreeView)
........
End Sub但在e.Cell.Controls.Add(MyTreeView)会出错: Object reference not set to an instance of an object.
请问如何可以实现? 谢谢!
Protected Sub calendar1_DayRender(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DayRenderEventArgs) Handles Calendar1.DayRender
........
Dim MyTreeView = New TreeView
Dim mynode = New TreeNode
mynode.Text = "aaaaa"
mynode.Value = "aaaaa"
MyTreeView.Nodes.Add(mynode)
e.Cell.Controls.Add(MyTreeView)
........
End Sub但在e.Cell.Controls.Add(MyTreeView)会出错: Object reference not set to an instance of an object.
请问如何可以实现? 谢谢!
解决方案 »
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