老师，以下代码，在服务端，有时会报错，这种情况的偶尔发生，但一但报错了，服务器就不运行了，没找到问题点在那里？

Dim wb As New weui

\'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dim pkey As Integer = e.GetValues("key")
If e.PostValues.count = 0 Then
    wb.AddForm("","editpwd1","editpwd.htm")
    With wb.AddInputGroup("editpwd1","ipg1","更改密码")
        If pkey > 0 Then
            Dim fr As DataRow = DataTables("人员表").SQLFind("序号 = " & pkey)
            If fr IsNot Nothing Then
                .AddInput("name","姓名","text").Value = fr("姓名")
            Else
                .AddInput("name","姓名","text")
            End If
        Else
            .AddInput("name","姓名","text")
        End If
        .AddInput("opwd","旧 密 码","password").Placeholder = "第一次设置密码时为空"
        .AddInput("Npwd1","新 密 码","password")
        .AddInput("Npwd2","重复密码","password")
    End With
    With wb.AddButtonGroup("editpwd1","btg1",True)
        .Add("btn1", "确认", "submit")
        .Add("btn1", "返回","","logon.htm").Kind = 1
    End With
Else
    Dim fr As DataRow = Functions.Execute("fir",e.PostValues("name") )
    If fr Is Nothing Then
        With wb.AddMsgPage("","msgpage","提示", "您不是本公司的员工或您输入的用户名错误!")
            .icon = "Warn" \'改变图标
            .AddButton("btn1","返回").Attribute = ""
        End With
    Else
        If fr.IsNull("pwd") = False Then
            If e.PostValues("opwd") <> fr("pwd") Then
                With wb.AddMsgPage("","msgpage","密码错误", "您输入的旧密码错误!")
                    .icon = "Warn" \'改变图标
                    .AddButton("btn1","返回").Attribute = ""
                End With
            End If
        End If
        If e.PostValues("npwd1") = e.PostValues("npwd2") Then
            fr("pwd") = e.PostValues("npwd2")
            fr.Save
            With wb.AddMsgPage("","msgpage","修改提示", "密码修改完成!")
                .AddButton("btn1","返回","logon.htm")
            End With
        Else
            With wb.AddMsgPage("","msgpage","输入错误", "您二次输入的密码不一致!")
                .icon = "Warn" \'改变图标
                .AddButton("btn1","返回").Attribute = ""
            End With
        End If
    End If
End If
\'wb.AddPageFooter("","pf1","").AddLink("返回登录","logon.htm")
e.WriteString(wb.Build) \'生成网页

.NET Framework 版本：4.0.30319.18063
Foxtable 版本：2019.11.3.1
错误所在事件：自定义函数editpwd
详细错误信息：
调用的目标发生了异常。
已添加了具有相同键的项。

老师，试过，在点击确认后，网页未刷新完成，再点击确认就会有这样的错误！

Dim wb As New weui
wb.AddPageTitle("","pageheader","2020","上格兰格春节联欢晚会")
Select Case e.Path   
    Case "wefox"
        Functions.Execute("wefox",e)
    Case  "getBrands.htm"
        Dim pps As String = DataTables("人员表").SQLGetComboListString("部门","公司=\'" & e.PostValues("公司") & "\'")
        e.WriteString(pps)
    Case "logon.htm",""
        Dim path As String = e.Path
        If path = Nothing Then path = "logon.htm"
        Functions.Execute(path.replace(".htm",""),e)
    Case Else
        Functions.Execute(e.path.replace(".htm",""),e)       
    End  Select

\'~~~~~~~~以下为函数

Dim e As RequestEventArgs = args(0)
Dim wb As New weui
wb.AddPageTitle("","pageheader","2020","上格兰格春节联欢晚会")
\'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dim pkey As Integer = e.GetValues("key")
If e.PostValues.count = 0 Then
    wb.AddForm("","editpwd1","editpwd.htm")
    With wb.AddInputGroup("editpwd1","ipg1","更改密码")
        If pkey > 0 Then
            Dim fr As DataRow = DataTables("人员表").SQLFind("序号 = " & pkey)
            If fr IsNot Nothing Then
                .AddInput("name","姓名","text").Value = fr("姓名")
            Else
                .AddInput("name","姓名","text")
            End If
        Else
            .AddInput("name","姓名","text")
        End If
        .AddInput("opwd","旧 密 码","password").Placeholder = "第一次设置密码时为空"
        .AddInput("Npwd1","新 密 码","password")
        .AddInput("Npwd2","重复密码","password")
    End With
    With wb.AddButtonGroup("editpwd1","btg1",True)
        .Add("btn1", "确认", "submit")
        .Add("btn1", "返回","","logon.htm").Kind = 1
    End With
Else
    Dim fr As DataRow = Functions.Execute("fir",e.PostValues("name") )
    If fr Is Nothing Then
        With wb.AddMsgPage("","msgpage","提示", "您不是本公司的员工或您输入的用户名错误!")
            .icon = "Warn" \'改变图标
            .AddButton("btn1","返回").Attribute = ""
        End With
    Else
        If fr.IsNull("pwd") = False Then
            If e.PostValues("opwd") <> fr("pwd") Then
                With wb.AddMsgPage("","msgpage","密码错误", "您输入的旧密码错误!")
                    .icon = "Warn" \'改变图标
                    .AddButton("btn1","返回").Attribute = ""
                End With
            End If
        End If
        If e.PostValues("npwd1") = e.PostValues("npwd2") Then
            fr("pwd") = e.PostValues("npwd2")
            fr.Save
            With wb.AddMsgPage("","msgpage","修改提示", "密码修改完成!")
                .AddButton("btn1","返回","logon.htm")
            End With
        Else
            With wb.AddMsgPage("","msgpage","输入错误", "您二次输入的密码不一致!")
                .icon = "Warn" \'改变图标
                .AddButton("btn1","返回").Attribute = ""
            End With
        End If
    End If
End If
\'wb.AddPageFooter("","pf1","").AddLink("返回登录","logon.htm")
e.WriteString(wb.Build) \'生成网页

老师，问题依旧，应该不是这个问题，还原到错误原因，但不知怎么处理。

在点击确认后，网页未刷新完成，再点击确认就会有这样的错误！