主题：[求助] 压缩图片上传

老师，请教两个问题“”

1、下面的码执行时提示 上传失败 但文件夹和表里都有文件了，不过没有压缩。不知问题出在哪里？谢谢！

2、上传成功后在该页面刷新又会增加一行，如何避免？谢谢！

Dim wb As New weui
Select Case e.Path
    Case "addnew.htm"
        If e.PostValues.Count = 0 Then
            wb.AddForm("","form1","addnew.htm")
            With wb.AddInputGroup("form1","ipg1","增加员工")
                .AddInput("姓名","姓名","Text") '前一个"姓名"是ID,后一个"姓名"是标题
                .AddInput("年龄","年龄","number")
                .AddSelect("学历","学历","大专|本科|硕士|博士")
            With .AddUploader("zp","照片",True)
                .AllowDelete = True '允许删除
                .Incremental = True '允许重复选择文件或连续拍照
                .ScaleWidth = 400 '自动压缩图片宽度为400个像素,高度等比例压缩
            End With
        End With
        With wb.AddButtonGroup("form1","btg1",True)
            .Add("btn1", "确定", "button").Attribute= ""'调用js函数上传      函数黏贴不上，就是帮助里面的。
        End With
        wb.AddToast("","tst1", "正在上传",1)
        wb.AddToast("","tst2", "上传成功",0)
        wb.AddToast("","tst3", "上传失败",0).Icon= "warn"
        wb.AppendHTML("<script src='./lib/scystp.js'></script>") '引入脚本文件

            e.WriteString(wb.Build)
        Else
            Dim nms() As String = {"姓名","年龄","学历"}
            Dim dr As DataRow = DataTables("员工").AddNew()
            For Each nm As String In nms
                dr(nm) = e.PostValues(nm)
            Next
            For Each key As String In e.Files.Keys
                If key = "zp" Then
                    For Each fln As String In e.Files(key)
                        e.SaveFile(key, fln, "D:\web\Image\" & fln)
                    Next
                    dr.Lines("照片") = e.Files(key)
                End If
            Next
            '保存并生成增加成功提示页面
            dr.save()
            With wb.AddMsgPage("","msgpage","增加成功", "好好学习,天天向上") '生成成功提示页
                .AddButton("btn1","继续增加","addnew.htm")
            End With
            e.WriteString(wb.Build)
        End If
End Select

色老师好！我是按照帮助中做的，测试例子没问题，那个问题我再慢慢去解决。

我想请教 如何判断没有选择照片？如何调用手机的相机？如何在上传照片时只能上传当时拍摄的照片而不能在手机中选择照片？谢谢！