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WiaSession Class Methods
Summary
For a list of all members of this type, see WiaSession members
Public Methods
| Name | Description | |
|---|---|---|
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Acquire | Acquires one or more images from a WIA source. |
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AcquireImageFromVideo | Extracts a still image from the video stream, and saves the image as a JPEG file. |
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AcquireSimple | Acquires one or more images from a WIA source. |
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AcquireToFile | Acquires one or more images from a WIA source directly to file(s). |
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EndVideoPreview | Shuts down the streaming video. |
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EnumCapabilities | Enumerates all of the available WIA driver capabilities and properties and determines the available values for each one. |
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EnumChildItems | Enumerates all available child items for the root item specified in the parentItem parameter. |
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EnumDevices | Enumerates all available system WIA devices connected to the user's machine. |
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EnumFormats | Enumerates all of the available WIA driver transfer formats. |
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FreeItem | Frees the items enumerated by the EnumChildItems method. |
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GetCategoryGuid | Retrieves the relevant System.Guid structure for the WIA 2.0 item's category. |
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GetFormatGuid | Retrieves the relevant System.Guid structure for the passed file format ID. |
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GetProperties | Gets the properties for the specified item. |
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GetPropertyBuffer | Retrieves the Stream buffer for any WiaVariableTypes.UI1 or WiaVariableTypes.Vector property. |
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GetPropertyGuid | Retrieves the Guid structure for any WiaVariableTypes.Clsid property. |
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GetPropertyIdString | Gets the equivalent string for the passed property ID. |
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GetPropertyLong | Retrieves the Long value for a WIA property of any of the following types: WiaVariableTypes.I1, WiaVariableTypes.UI1, WiaVariableTypes.I2, WiaVariableTypes.UI2, WiaVariableTypes.I4, WiaVariableTypes.UI4, WiaVariableTypes.Int, WiaVariableTypes.UInt, WiaVariableTypes.R4, or WiaVariableTypes.R8. |
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GetPropertyString | Retrieves a string buffer for any WiaVariableTypes.Bstr property. |
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GetPropertySystemTime | Retrieves a System.DateTime structure for any WiaVariableTypes.UI2 or WiaVariableTypes.Vector property. |
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GetRootItem | Gets the equivalent string for the passed property ID. |
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GetSelectedDevice | Gets a string that contains the ID for currently selected device. |
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IsAvailable | Determines which version of the WIA source is installed. |
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IsVideoPreviewAvailable | Determines whether there is an available video preview. |
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ResizeVideoPreview | Resizes the video playback to the largest supported resolution that fits inside the parent window. |
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SelectDevice | Selects the WIA device represented by the passed device ID. |
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SelectDeviceDlg | Displays a dialog box that enables the user to select a WIA hardware device for image acquisition. |
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SetProperties | Sets the values of the properties to the values specified in the WiaProperties structure into the WIA device's item passed through the item parameter. |
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SetPropertyBuffer | Fills the Stream buffer for any WiaVariableTypes.UI1 or WiaVariableTypes.Vector property. |
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SetPropertyGuid | Sets WiaVariableTypes.Clsid property values. |
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SetPropertyLong | Sets the Long value for the WiaVariableTypes.I1, WiaVariableTypes.UI1, WiaVariableTypes.I2, WiaVariableTypes.UI2, WiaVariableTypes.I4, WiaVariableTypes.UI4, WiaVariableTypes.Int, WiaVariableTypes.UInt, WiaVariableTypes.R4, and WiaVariableTypes.R8 properties. |
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SetPropertyString | Sets a string value for any WIA property of type WiaVariableTypes.Bstr that is not Read only. |
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SetPropertySystemTime | Sets the date and time of the specified item in the form of a System.DateTime structure for WiaVariableTypes.UI2 or WiaVariableTypes.Vector properties. |
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Shutdown | Ends a WIA session. |
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Startup | Initializes the WIA session. |
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StartVideoPreview | Starts the video preview inside the window handle specified through the owner parameter. |
Protected Methods
| Name | Description | |
|---|---|---|
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Dispose | This member supports the Leadtools infrastructure and is not intended to be used directly from your code. |
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Finalize | This member overrides the System.Object.Finalize method. |
See Also
