老师我网页逻辑如下：

先生成列表，生成下面页面：

此主题相关图片如下：11.jpg

点击出场登记，生成下面页面：

此主题相关图片如下：22.jpg

然后修改出场日期，点击保存不了，哪儿问题呢，代码如下：

Dim e As object = args(0)
\'Dim e As RequestEventArgs = args(0)
Dim wb As New weui
Dim dr As DataRow = DataTables("实名制管理").SQLFind("项目名称 = \'" & _Userxmmc & "\' and 姓名 = \'" & e.getvalues("name") & "\'")
If dr IsNot Nothing Then
    If e.PostValues.Count = 0 Then
        wb.AddForm("","form1","ReNamejccx_name.htm")
        With wb.AddInputGroup("form1","工人信息","工人信息")
            With .AddInput("姓名","姓  名","Text")
                .Value = dr("姓名")
                .Readonly= True
            End With
            With .AddInput("身份证号码","身份证号","number")
                .Value = dr("身份证号码")
                .Readonly= True
            End With
            With .AddInput("家庭地址","家庭地址","Text")
                .Value = dr("家庭地址")
                .Readonly= True
            End With
            With .AddInput("进场日期","进场日期","date")
                .Value = dr("进场日期")
                .Readonly= True
            End With
            .AddInput("退场日期","退场日期","date")
            .AddInput("退场登记人","退场登记人","Text")
            .AddInput("退场登记日期","退场登记日期","date")
        End With
        With wb.AddButtonGroup("form1","btg2", True)
            .Add("btn1", "重新查询", "", "ReNamejccx.htm")
            .Add("btn2", "保  存", "submit")
        End With
        e.WriteString(wb.Build)
    Else
        Dim nms() As String = {"退场日期","退场登记人","退场登记日期"} \'不能为空的列名数组
        For Each nm As String In nms
            If e.PostValues.ContainsKey(nm) = False Then \'生成错误提示页
                With wb.AddMsgPage("","msgpage","保存失败", nm & "列不能为空!")
                    .icon = "Warn" \'改变图标
                    .AddButton("btn1","返回").Attribute = ""
                End With
                e.WriteString(wb.Build)
                Return Nothing \'必须返回
            End If
        Next
        nms = New String() {"退场日期","退场登记人","退场登记日期"}  \'重新定义了nms数组,增加了两列.
        Dim ds As DataRow = DataTables("实名制管理").SQLFind("项目名称 = \'" & _Userxmmc & "\' and 姓名 = \'" & e.getvalues("name") & "\'")
        For Each nm As String In nms
            If e.PostValues.ContainsKey(nm) Then
                ds(nm) = e.PostValues(nm)
            End If
        Next
        ds.save()
        \'保存并生成增加成功提示页面
        With wb.AddMsgPage("","msgpage","保存成功", "你是否继续修改其他人员退场信息") \'生成成功提示页
            .AddButton("btn2","返回首页","default.htm")
            .AddButton("btn1","继续修改","ReNamejccx.htm")
        End With
        e.WriteString(wb.Build)
    End If
End If

这段代码是ReNamejccx_name.htm页面的，生成页面的时候弹出的都是正确的值，保存的时候弹出name=  ,msgbox(dr IsNot Nothing)为False，后面代码都没执行了

如果不要这一句：If dr IsNot Nothing Then，后面代码都执行了，但是最后报错：

老师，生成ReNamejccx.htm页面时，出场日期为空时，显示的是00:00:00，怎么让它不显示00:00:00

            txt = txt & "<p>进场日期:" & dr("进场日期") & "&ensp; &ensp; &ensp;退场日期:" & dr("退场日期") & "</p>"