HasAnyDocumentPageText Method

public bool HasAnyDocumentPageText()

'Declaration
 

Public Function HasAnyDocumentPageText() As Boolean

'Usage
 

Dim instance As DocumentViewerText
Dim value As Boolean
 
value = instance.HasAnyDocumentPageText()

public:
bool HasAnyDocumentPageText(); 

Return Value

DocumentViewerText contains many operations that require the text of the page(s) being parsed. This is done by calling the DocumentPage.GetText method of the page.

DocumentPage.GetText parses the text from the page using SVG or OCR and that could be a slow operation. Hence, when it is called by DocumentViewerText, the resulting DocumentPageText object is stored internally and re-used when it is needed.

When the user sets a new Document in DocumentViewer using SetDocument, the saved DocumentPageText objects are discarded but the viewer will not start parsing the text for any pages till it is needed.

When all the text for all pages have been obtained, whether through the use of AutoGetText, GetDocumentPageText or GetAllDocumentPageText, then HasAnyDocumentPageText will return true and indicates that all text operations will be instant.

Target Platforms

Reference

DocumentViewerText Class
DocumentViewerText Members