zxing qr code encoder example c# Part 6: Excel and the Outside World: Collaborating Made Easy in C#.NET

Encoder QR Code in C#.NET Part 6: Excel and the Outside World: Collaborating Made Easy

Part 6: Excel and the Outside World: Collaborating Made Easy
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You can use the same theory in Excel using the Workbook object as your top-level reference. You can do this by using the Excel.Sheet class name to create the workbook or by using the Excel.Chart class name to create a workbook that contains a worksheet with an embedded Chart object and a worksheet that contains a default data set for the chart. To create a Workbook object, you use the CreateObject function because the Excel.Sheet and Excel.Chart class names don t support the New keyword. The following example automates Excel, starting with a Workbook object that contains a single worksheet: 456
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Excel and Other Office Applications
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Dim wbkSheet As Excel.Workbook
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Set wbkSheet = CreateObject("Excel.Sheet )
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To automate Excel starting with the Workbook object that contains a worksheet with a chart and another worksheet, use the following code.
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Dim wbkChart As Excel.Workbook
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Set wbkChart = CreateObject("Excel.Chart )
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When automating Excel starting from a Workbook object or automating Word starting from a Document object, an implicit reference is created to the Application object. If you need to access properties and methods of the Application object, use the appropriate Application property of the Document or Workbook objects. Using the Document or Workbook objects as top-level objects reduces the amount of code you have to write. In most cases your code will be easier to follow and more consistent than when you reference the Application object. Table 21-1 lists all the top-level Office objects that can be referenced and their class names.
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Table 21-1.
Top-Level Office Objects and Their Associated Class Names
Class Name
Access.Application Excel.Application Excel.Sheet Excel.Chart FrontPage.Application Outlook.Application PowerPoint.Application Word.Application Word.Document
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Top-Level Office Object
Access Application object Excel Application object Excel Workbook object FrontPage Application object Outlook Application object PowerPoint Application object Word Application object Word Document object
Opening a Document in Word
If you want to open a file created using a different Office application than you are currently using, use the GetObject function to directly open the file. However, it s just as easy to open an instance of the application and open the file from the application. The following code copies a range in Excel to the clipboard. It then starts a new instance of Word, opens an existing Word document and pastes the range at the end of the document. Because the code uses early binding, be sure to set up the reference to the Word Object Library first. Note In the example that follows, be sure to replace the worksheet name and the filename to reference a file located on your computer. If you are referencing files that don t exist, an error will occur when you test this procedure.
Part 6: Excel and the Outside World: Collaborating Made Easy
Microsoft Office Excel 2003 Programming Inside Out
Sub CopyFromExcelToWord() Dim wdApp As Word.Application ThisWorkbook.Sheets("Table ).Range("A1:B6 ).Copy Set wdApp = New Word.Application With wdApp.Application .Documents.Open Filename:="C:\test.doc" With .Selection .EndKey unit:=wdStory .TypeParagraph .Paste End With .ActiveDocument.Save .Quit End With Set wdApp = Nothing End Sub
Debugging with Hidden Application Objects When a procedure includes applications that aren t visible, you might run into memory issues when debugging your code. When a procedure opens a hidden copy of an application and the code is stopped before the Quit method has been executed, an instance of the application will continue to run in the background until it has been forced to close. Each time the procedure is run and stopped before the Quit method is executed, an additional copy of the application will be in memory. This can cause serious memory errors with your system, so be sure to force the hidden application to close by using the Task Manager.
Part 6: Excel and the Outside World: Collaborating Made Easy
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The New keyword creates a new instance of Word, even if it is already open. The Open method of the Documents collection is used to open an existing file. The code then selects the end of the document, enters a new empty paragraph, and pastes the range. The document is then saved, and the new instance of Word is closed. Now that you can open an existing Word document and place Excel data into Word, consider the following scenario. The Garden Supply Company has the promotional schedule outlined in a document named Spring Promotion.doc. You need to enter the same information into Excel. The following procedure will open the Word document and will place a copy of the file contents into a new Excel workbook:
Sub Dim Dim Dim Dim Dim Dim CopyWordToExcel()
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