【发布时间】：2014-07-08 22:08:39
【问题描述】：
我在 VB.NET/ASP.NET 应用程序中有一个 TreeView。
当页面加载时，TreeView 正在以编程方式填充。但是，当我尝试扩展一个节点时，它正在扩展错误的节点。
示例：我有一个有 5 个孩子的节点。节点一和二有子节点，当我尝试展开节点二时，它会展开节点一，当我尝试展开节点一时，它也会展开节点一。
我已经尝试重新组织TreeView的结构并尝试将节点一一添加，但仍然没有成功。
编辑： 以下是我的 TreeView 中的相关代码：
For Each V2MaterialRow In DS.Tables("AllinOne").Rows
connection.Open()
command = New SqlCommand("Select FormName from ISO where PageTitle='Material Details'", connection)
Dim FormName As String = command.ExecuteScalar()
connection.Close()
V2MaterialNode = New TreeNode
V2MaterialNode.ToolTip = "V2 Material Details"
V2MaterialNode.Text = FormName & " " & V2MaterialRow("Version")
V2MaterialNode.Value = V2MaterialRow("Qno")
V2MaterialNode.ShowCheckBox = True
V2MaterialNode.NavigateUrl = "V2MaterialDetails.aspx?text=" + V2MaterialRow("Qno")
V2MaterialNode.Target = "_blank"
node.ChildNodes.Add(V2MaterialNode)
connection.Open()
command = New SqlCommand("Select * from Specallinone where qno='" + V2MaterialRow("Qno") + "'", connection)
datareader = command.ExecuteReader()
If datareader.HasRows = False Then
datareader.Close()
For Each PurchaseOrderRow In DS.Tables("PurchaseOrder").Rows
PurchaseOrderNode = New TreeNode
PurchaseOrderNode.ToolTip = "Purchase Order"
PurchaseOrderNode.Text = "Purchase Order - " + PurchaseOrderRow("supplier") + " " + PurchaseOrderRow("Ordernumber")
PurchaseOrderNode.Value = PurchaseOrderRow("Qno")
PurchaseOrderNode.NavigateUrl = "PurchaseOrder.aspx?qno=" + PurchaseOrderRow("Qno") + "&Jobno=" + PurchaseOrderRow("JobNumber") + "&Orderno=" + PurchaseOrderRow("Ordernumber") + "&text=" + Replace(PurchaseOrderRow("supplier"), "&", "$") + ""
PurchaseOrderNode.Target = "_blank"
V2MaterialNode.ChildNodes.Add(PurchaseOrderNode)
Next
Else
datareader.Close()
End If
connection.Close()
For Each LabelRow As DataRow In DS.Tables("AllinOne").Rows
Dim Labelnode = New TreeNode
Labelnode.ToolTip = "PO Labels"
Labelnode.Text = "PO Labels"
Labelnode.Value = LabelRow("Qno")
'Labelnode.ShowCheckBox = True
Labelnode.NavigateUrl = "GeneratePOLabels.aspx?text=" + LabelRow("Qno")
Labelnode.Target = "_blank"
Try
connection.Open()
command = New SqlCommand("Select * from purchaseorder where qno='" + LabelRow("Qno") + "' and Jobnumber<>''", connection)
datareader = command.ExecuteReader()
If datareader.HasRows = False Then
datareader.Close()
Exit For
Else
datareader.Close()
V2MaterialNode.ChildNodes.Add(Labelnode)
End If
Catch ex As Exception
Messagebox.Show("Error in Dispalying the Labels...")
Finally
connection.Close()
End Try
Next
Next
For Each MPORow In DS.Tables("ManualPO").Rows
Dim Supplier As String
connection.Open()
command = New SqlCommand("Select Distinct Supplier from ManualPurchaseOrder where ManualDetailsId='" + MPORow("ManualDetailsId").ToString + "' ", connection)
datareader = command.ExecuteReader()
While datareader.Read()
Supplier = Supplier + datareader.Item("Supplier") + ","
End While
datareader.Close()
connection.Close()
MPONode = New TreeNode
MPONode.Value = MPORow("ManualDetailsId")
MPONode.Text = "Manual PO " & MPORow("ManualDetailsId") & " Supplier:" & Supplier.ToString
Supplier = ""
node.ChildNodes.Add(MPONode)
Dim ManualPODetailsDa As New SqlDataAdapter("Select distinct supplier,Jobnumber,ordernumber,Qno from PurchaseOrder where Ordernumber in (Select Distinct OrderNumber From ManualPurchaseOrder where ManualDetailsId = '" + MPORow("ManualDetailsId") + "') ", connection)
Dim ManualPODetailsDs As New DataSet
ManualPODetailsDa.Fill(ManualPODetailsDs)
For Each ManualPODetailsDR As DataRow In ManualPODetailsDs.Tables(0).Rows
MPODNode = New TreeNode
MPODNode.Value = ManualPODetailsDR("OrderNumber")
MPODNode.Text = "Purchase Order - " + ManualPODetailsDR("supplier") + " " + ManualPODetailsDR("Ordernumber")
MPODNode.NavigateUrl = "PurchaseOrder.aspx?qno=" + ManualPODetailsDR("Qno") + "&Jobno=" + ManualPODetailsDR("JobNumber") + "&Orderno=" + ManualPODetailsDR("Ordernumber") + "&text=" + Replace(ManualPODetailsDR("supplier"), "&", "$") + ""
MPODNode.Target = "_blank"
MPONode.ChildNodes.Add(MPODNode)
Next
Next
For Each Takeoffrow In DS.Tables("AllinOne").Rows
connection.Open()
command = New SqlCommand("Select FormName from ISO where PageTitle='Take-Off-Sheets'", connection)
Dim FormName As String = command.ExecuteScalar()
TakeOffNode = New TreeNode
TakeOffNode.ToolTip = "Take Off Sheets"
TakeOffNode.Text = FormName & " " & Takeoffrow("Version")
TakeOffNode.Value = Takeoffrow("Qno")
TakeOffNode.ShowCheckBox = True
TakeOffNode.NavigateUrl = "TakeOffSheet.aspx?text=" + Takeoffrow("Qno")
TakeOffNode.Target = "_blank"
node.ChildNodes.Add(TakeOffNode)
command = New SqlCommand("Select count(*) from ManualTakeOffSheet where srecid in (Select Distinct Srecid from Specdetails where Quoteno='" + Takeoffrow("Qno") + "')", connection)
Dim MTS As Integer = 0
MTS = command.ExecuteScalar()
connection.Close()
If MTS > 0 Then
Dim ManualTakeoffnode As New TreeNode
ManualTakeoffnode.ToolTip = "Manual Take Off Sheets"
ManualTakeoffnode.Text = "Manual Take Off Sheets" & " " & Takeoffrow("Version")
ManualTakeoffnode.Value = Takeoffrow("Qno")
ManualTakeoffnode.NavigateUrl = "ManualTakeOffSheet.aspx?text=" + Takeoffrow("Qno")
ManualTakeoffnode.Target = "_blank"
TakeOffNode.ChildNodes.Add(ManualTakeoffnode)
End If
Next
【问题讨论】：
-
这可能与
node.value有关——我认为它必须是独一无二的。您的某些节点值是否相同？ -
否......所有子节点都有不同的值......一个有“材料详细信息”，一个有“起飞表”
-
嗯，也许您可以发布您的树视图代码/任何相关代码？
-
编辑了我的问题以显示相关代码。
-
那么当您说“尝试扩展节点 2”时，与您的代码相关的是哪个节点？