-- 作者：pcxjxjhkw
-- 发布时间：2014/10/6 15:04:00
-- [求助]进度条问题
下面这段代码中，进度条不能正常显示，麻烦老师们审查一下，是什么地方出错了，谢谢
With Tables("信访办理_附件表")
If .ShowCheckBox = False Then \'单个下载
If .Current IsNot Nothing Then
Dim wj As String = .Current("路径及文件名")
Dim Ifo As new FileInfo(wj)
If FileSys.FileExists(wj) = True \'检查文件是否存在
Dim dlg As New SaveFileDialog \'定义一个新的SaveFileDialog
dlg.FileName = Ifo.Name
dlg.Title = "文件下载..."
dlg.OverwritePrompt =True
\'dlg.InitialDirectory = SpecialFolder.MyDocuments
If dlg.FileName = wj Then
dlg.InitialDirectory = SpecialFolder.MyDocuments \'最初显示的目录为我的文档
End If
If dlg.ShowDialog = DialogResult.Ok Then \'如果用户单击了确定按钮
If dlg.FileName <> wj Then \'不能保存于当前目录
FileSys.CopyFile(wj,dlg.FileName,True)
.Current("下载次数") = .Current("下载次数") + 1
.Current("最近下载人") = _UserName
.Current("最近下载时间") = Date.Now
Dim lst As new List(of String)
lst = .Current.DataRow.Lines("下载情况")
If .Current("下载情况") = Nothing Then
lst.Add("序号 下载时间 下载人 计算机名")
lst.Add(.Current("下载次数") & " " & Date.Now & " " & _UserName & " " & SysInfo.ComputerName)
Else
lst.Add(.Current("下载次数") & " " & Date.Now & " " & _UserName & " " & SysInfo.ComputerName)
End If
.Current.DataRow.Lines("下载情况") = lst
.save()
If MessageBox.Show("文件下载成功,是否打开?","温馨提示",MessageBoxButtons.YesNo,MessageBoxIcon.Warning)=DialogResult.Yes Then
Dim Proc As New Process \'打开文件
Proc.File = dlg.FileName
Proc.Start()
End If
End If
End If
Else
MessageBox.Show("下载失败!该文件已不存在,可能已被删除!","温馨提示",MessageBoxButtons.OK,MessageBoxIcon.Error)
End If
End If
Else \'批量下载
If .GetCheckedRows.count = 0 Then
MessageBox.Show("错误!未选择要下载的附件,请勾选!.","温馨提示",MessageBoxButtons.OK,MessageBoxIcon.Warning)
Return
Else
Dim dlg As New FolderBrowserDialog \'定义一个新选择目录对话框
dlg.Description = "请选择批量下载文件的路径..." \'对话框说明信息
dlg.ShowNewFolderButton = True \'显示新建文件夹按钮
If dlg.ShowDialog = DialogResult.Ok Then \'如果用户单击了确定按钮
Dim s As Integer = 0 \'记录成功下载文件的个数
\'显示进度条
Forms("进度").Show \'打开进度窗口
Dim pb As WinForm.ProgressBar = Forms("进度").Controls("进度条")
Dim xx As WinForm.Label = Forms("进度").Controls("信息")
Dim xx1 As WinForm.Label = Forms("进度").Controls("信息1")
Dim jd As WinForm.Label = Forms("进度").Controls("进度")
xx1.Text = "下载附件,请稍等..."
xx.text = "正在下载:"
pb.Minimum = 0
pb.Maximum = .GetCheckedRows.count
pb.Value = 0
jd.text = "0%"
\'======================
For I As Integer = 1 To .GetCheckedRows.count
Dim r As Row = .GetCheckedRows(i-1)
Dim wj As String = r("路径及文件名")
Dim Ifo As new FileInfo(wj) \'文件信息
xx.text = "正在下载: " & Ifo.Name
If FileSys.FileExists(wj) = True \'检查文件是否存在,只有该文件存在才下载复制
FileSys.CopyFile(wj,dlg.SelectedPath & "\\" & Ifo.Name ,True) \'复制文件
s = s + 1
\'更新下载信息
r("下载次数") = r("下载次数") + 1
r("最近下载人") = _UserName
r("最近下载时间") = Date.Now
Dim lst As new List(of String)
lst = r.DataRow.Lines("下载情况")
If r("下载情况") = Nothing Then
lst.Add("序号 下载时间 下载人 计算机名")
lst.Add( r("下载次数") & " " & Date.Now & " " & _UserName & " " & SysInfo.ComputerName)
Else
lst.Add( r("下载次数") & " " & Date.Now & " " & _UserName & " " & SysInfo.ComputerName)
End If
r.DataRow.Lines("下载情况") = lst
End If
pb.Value = i
jd.text = Round2(pb.Value/pb.Maximum*100,1) & "%"
Next
.save()
Forms("进度").Close \'关闭进度窗口
If MessageBox.Show("成功下载 " & s & " 个文件.现在是否打开目录,请确认?","温馨提示",MessageBoxButtons.YesNo,MessageBoxIcon.Question) = DialogResult.Yes Then
Dim Proc As New Process \'打开目录
Proc.File = dlg.SelectedPath
Proc.Start()
End If
End If
End If
End If
End With
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