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我正在用C#开发应用程序以使用WIA 2.0库。目前我可以使用大部分功能,例如ADF(自动文档进纸器),滤镜等等。WIA 2.0双面打印属性
现在,我需要使用我的扫描仪(fujitsu)的双面打印器。
我试图将WIA_DPS_DOCUMENT_HANDLING_SELECT扫描仪属性设置为DUPLEX值。请参见下面的代码:
try
{
bool hasMorePages = false;
//determine if there are any more pages waiting
Property documentHandlingSelect = null;
Property documentHandlingStatus = null;
foreach (Property prop in WiaDev.Properties)
{
if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_SELECT)
documentHandlingSelect = prop;
if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_STATUS)
documentHandlingStatus = prop;
}
object obj = new object();
obj = (WIA_DPS_DOCUMENT_HANDLING_SELECT.DUPLEX);
documentHandlingSelect.set_Value(ref obj);
if (documentHandlingSelect != null) //may not exist on flatbed scanner but required for feeder
{
//check for document feeder
if ((Convert.ToUInt32(documentHandlingSelect.get_Value()) & WIA_DPS_DOCUMENT_HANDLING_SELECT.FEEDER) != 0)
{
hasMorePages = ((Convert.ToUInt32(documentHandlingStatus.get_Value()) & WIA_DPS_DOCUMENT_HANDLING_STATUS.FEED_READY) != 0);
if (hasMorePages)
{
// set the property to use FEEDER and DUPLEX (this result in the value of 5 in the property)
object obj = new object();
obj = (WIA_DPS_DOCUMENT_HANDLING_SELECT.FEEDER | WIA_DPS_DOCUMENT_HANDLING_SELECT.DUPLEX);
documentHandlingSelect.set_Value(ref obj);
}
}
}
return hasMorePages;
此代码编译好了,但我没能得到两个图像,当我执行这条线。它仅检索前:
imgFile = (ImageFile)wiaCommonDialog.ShowTransfer(item, format.Guid.ToString("B")/* wiaFormatJPEG*/, false);
我读到许多主题,该文档还,有可能让孩子的物体形成扫描仪上的项目,但只有一个在此集合中的项目。
请有人帮助我!
感谢