System.StackOverflowException当DataBind（）代码被触发

我有两个下拉列表一个工作，一个不是完全相同的代码。System.StackOverflowException当DataBind（）代码被触发

正确工作的第一个在TRY中有一个ddlist.databind（），当被触发时不会导致无限循环返回到每次数据绑定（）代码被触发时的代码开始。再次，这是我想要的方式工作。在dropdownlist3每次数据绑定（）情况将重新启动代码在小组

Dropdownlist1（正常工作）代码的开头后面

Protected Sub DropDownlist1_DataBinding1(sender As Object, e As EventArgs) 

    Dim O1IDText As String = DirectCast(FindControlRecursive(Me.Page, "HFO1ID"), HiddenField).Value 
    Dim ddList As DropDownList = CType(sender, DropDownList) 

    RemoveHandler ddList.DataBinding, AddressOf DropDownlist1_DataBinding1 
    Dim li As New ListItem("REMOVE/NO Official Scheduled", "", True) 
    Dim li3 As New ListItem("▲▲▲▲ Current Selected Official ▲▲▲▲", "", True) 
    Dim li4 As New ListItem("▼▼▼▼ All Available Officials ▼▼▼▼", "", True) 


    Dim i As Integer = 0 

    Try 
     ddList.DataBind() 

    Catch ex As ArgumentOutOfRangeException

Dropdownlist3（不能正常工作）后面的代码：

Protected Sub DropDownlist3_DataBinding3(sender As Object, e As EventArgs) 

    Dim O2IDText As String = DirectCast(FindControlRecursive(Me.Page, "HFO2ID"), HiddenField).Value 
    Dim ddList As DropDownList = CType(sender, DropDownList) 

    RemoveHandler ddList.DataBinding, AddressOf DropDownlist1_DataBinding1 
    Dim li As New ListItem("REMOVE/NO Official Scheduled", "", True) 
    Dim li3 As New ListItem("▲▲▲▲ Current Selected Official ▲▲▲▲", "", True) 
    Dim li4 As New ListItem("▼▼▼▼ All Available Officials ▼▼▼▼", "", True) 

    Dim i As Integer = 0 

    Try 
      ddList.DataBind() 

     Catch ex As ArgumentOutOfRangeException

我不明白为什么一个做无限循环，另一个没有。

这里是每一个下拉列表中的ASP代码：

Dropdownlist1：

<asp:DropDownList ID="DropDownList1" runat="server" AutoPostback="True" OnDataBinding="DropDownlist1_DataBinding1" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" AppendDataBoundItems="True" DataSourceID="SqlDataSource2" DataTextField="FullName" DataValueField="FullName" Height="24px" Width="193px" SelectedValue='<%# Bind("Official1") %>' >

DropDownlist3：

<asp:DropDownList ID="DropDownList3" runat="server" AutoPostback="True" OnDataBinding="DropDownlist3_DataBinding3" OnSelectedIndexChanged="DropDownList2_SelectedIndexChanged" AppendDataBoundItems="True" DataSourceID="SqlDataSource2" DataTextField="FullName" DataValueField="FullName" Height="25px" SelectedValue='<%# Bind("Official2") %>' Width="203px">

来源

2016-04-28 DannyBoy

我想通了，我自己的问题

我从来没有改变结尾：

RemoveHandler ddList.DataBinding, AddressOf DropDownlist1_DataBinding1

我需要这一行更改为：

RemoveHandler ddList.DataBinding, AddressOf DropDownlist3_DataBinding3

来源

2016-04-28 21:51:53 DannyBoy

System.StackOverflowException当DataBind（）代码被触发

回答

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