IIS中的WIA扫描问题 [英] WIA Scanning issue in IIS

问题描述

大家好，



我在IIS 7.5中部署我的Web应用程序后无法使用WIA进行扫描

我试过这个Windows 7和Server 2012.



甚至ScanImage功能也没有调用。当注释ShowAcquireImage行然后应用程序调用ScanImage函数，否则它会在浏览器中显示等待响应的消息。



任何帮助都非常感谢。



以下是我的扫描功能。

Hi Guys,

I am not able to scan using WIA after deploying my web application in IIS 7.5
I tried this in Windows 7 and Server 2012.

Even "ScanImage" function is not calling . When comment the line "ShowAcquireImage" then application calling ScanImage function otherwise it displays message as waiting for response in browser.

Any help is highly appreciated.

Below is my function for scanning.

<securitypermission(securityaction.demand,> _
    Public Function ScanImage(ByVal outputFormat As ImageFormat, ByVal fileName As String) As System.Drawing.Image
        If outputFormat Is Nothing Then
            Throw New ArgumentNullException("outputFormat")
        End If
        MessageBox.Show("1")
        Dim filePerm As New FileIOPermission(FileIOPermissionAccess.AllAccess, fileName)
        filePerm.Demand()
        MessageBox.Show("2")
        Dim imageObject As ImageFile = Nothing

        Try
            If WiaManager Is Nothing Then
                WiaManager = New CommonDialogClass()
            End If
            MessageBox.Show("3")
imageObject = WiaManager.ShowAcquireImage(WiaDeviceType.ScannerDeviceType, WiaImageIntent.ColorIntent, WiaImageBias.MinimizeSize, outputFormat.Guid.ToString("B"), True, False, False) 

''I am getting issue on above line

            MessageBox.Show("4")
            'imageObject.SaveFile(fileName)
            'Byte[] imageBytes = (byte[])imageObject.FileData.get_BinaryData();
            Dim imageBytes As Byte() = imageObject.FileData.BinaryData()
            ' <– Converts the ImageFile to a byte array
            Dim ms As New MemoryStream(imageBytes)

            'System.Drawing.Image image = System.Drawing.Image.FromStream(ms);

            Dim bmp As New Bitmap(System.Drawing.Image.FromStream(ms))

            Dim fileName1 As String = "D:\VBTest111.jpg"

            bmp.Save(fileName1, ImageFormat.Jpeg)
            Return System.Drawing.Image.FromFile(fileName1)

        Catch ex As COMException
            Dim message As String = "Error scanning image"
            Throw New WiaOperationException(message, ex)
        Finally
            If imageObject IsNot Nothing Then
                Marshal.ReleaseComObject(imageObject)
            End If
        End Try
    End Function

已添加预标签。 />
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推荐答案

首先

1.请检查扫描仪有WIA司机

2.你在机器上运行的应用程序已经安装了WIA驱动程序。

First
1.please check that the scanner has WIA drivers
2.The application you are running on the machine has installed WIA drivers.

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