I'm using WIA to acquire images from a scanner with C#. I can scan the papers, but I can't set up the page size correctly, it always defaults to A4 and I need to use Letter or Legal sometimes.
I tried with the WIA_DPS_PAGE_SIZE property, but when I try to set a value, I always get an error, that the value is out of the interval (tried a lot of possible values).
I wan't to be able to use WIA_DPS_PAGE_SIZE = WIA_PAGE_AUTO (for automatic page size), but I can't find anything on the web related to this.
Does anyone know a solution? thanks!
I know this is probably too late to actually help you with that, but it may become handy for future reference. To change scanned items properties use such code:
WIA.CommonDialog wiaDlg;
WIA.Device wiaDevice;
WIA.DeviceManager wiaManager = new DeviceManager();
wiaDlg = new WIA.CommonDialog();
wiaDevice = wiaDlg.ShowSelectDevice(WiaDeviceType.ScannerDeviceType, false, false);
foreach (WIA.Item item in wiaDevice.Items)
{
StringBuilder propsbuilder = new StringBuilder();
foreach (WIA.Property itemProperty in item.Properties)
{
IProperty tempProperty;
Object tempNewProperty;
if (itemProperty.Name.Equals("Horizontal Resolution"))
{
tempNewProperty = 75;
((IProperty)itemProperty).set_Value(ref tempNewProperty);
}
else if (itemProperty.Name.Equals("Vertical Resolution"))
{
tempNewProperty = 75;
((IProperty)itemProperty).set_Value(ref tempNewProperty);
}
else if (itemProperty.Name.Equals("Horizontal Extent"))
{
tempNewProperty = 619;
((IProperty)itemProperty).set_Value(ref tempNewProperty);
}
else if (itemProperty.Name.Equals("Vertical Extent"))
{
tempNewProperty = 876;
((IProperty)itemProperty).set_Value(ref tempNewProperty);
}
}
image = (ImageFile)item.Transfer(WIA.FormatID.wiaFormatPNG);
}
This means that scanned document will be size A4 with dimensions 619 x 876.