FieldDde Class

Implements the DDE field.

Inheritance Hierarchy

SystemObject
Aspose.Words.FieldsField
Aspose.Words.FieldsFieldDde

Namespace: Aspose.Words.Fields
Assembly: Aspose.Words (in Aspose.Words.dll) Version: 20.3

Syntax

C++

public class FieldDde : Field

Public Class FieldDde
	Inherits Field

public ref class FieldDde : public Field

type FieldDde =  
    class
        inherit Field
    end

The FieldDde type exposes the following members.

Constructors

	Name	Description
	FieldDde	Initializes a new instance of the FieldDde class

Properties

	Name	Description
	AutoUpdate	Gets or sets whether to update this field automatically.
	DisplayResult	Gets the text that represents the displayed field result. (Inherited from Field.)
	End	Gets the node that represents the field end. (Inherited from Field.)
	Format	Gets a FieldFormat object that provides typed access to field's formatting. (Inherited from Field.)
	InsertAsBitmap	Gets or sets whether to insert the linked object as a bitmap.
	InsertAsHtml	Gets or sets whether to insert the linked object as HTML format text.
	InsertAsPicture	Gets or sets whether to insert the linked object as a picture.
	InsertAsRtf	Gets or sets whether to insert the linked object in rich-text format (RTF).
	InsertAsText	Gets or sets whether to insert the linked object in text-only format.
	InsertAsUnicode	Gets or sets whether to insert the linked object as Unicode text.
	IsDirty	Gets or sets whether the current result of the field is no longer correct (stale) due to other modifications made to the document. (Inherited from Field.)
	IsLinked	Gets or sets whether to reduce the file size by not storing graphics data with the document.
	IsLocked	Gets or sets whether the field is locked (should not recalculate its result). (Inherited from Field.)
	LocaleId	Gets or sets the LCID of the field. (Inherited from Field.)
	ProgId	Gets or sets the application type of the link information.
	Result	Gets or sets text that is between the field separator and field end. (Inherited from Field.)
	Separator	Gets the node that represents the field separator. Can be null. (Inherited from Field.)
	SourceFullName	Gets or sets the name and location of the source file.
	SourceItem	Gets or sets the portion of the source file that's being linked.
	Start	Gets the node that represents the start of the field. (Inherited from Field.)
	Type	Gets the Microsoft Word field type. (Inherited from Field.)

Methods

	Name	Description
	Equals	(Inherited from Object.)
	GetFieldCode	Returns text between field start and field separator (or field end if there is no separator). Both field code and field result of child fields are included. (Inherited from Field.)
	GetFieldCode(Boolean)	Returns text between field start and field separator (or field end if there is no separator). (Inherited from Field.)
	GetHashCode	(Inherited from Object.)
	GetType	(Inherited from Object.)
	Remove	Removes the field from the document. Returns a node right after the field. If the field's end is the last child of its parent node, returns its parent paragraph. If the field is already removed, returns null. (Inherited from Field.)
	ToString	(Inherited from Object.)
	Unlink	Performs the field unlink. (Inherited from Field.)
	Update	Performs the field update. Throws if the field is being updated already. (Inherited from Field.)
	Update(Boolean)	Performs a field update. Throws if the field is being updated already. (Inherited from Field.)

Remarks

For information copied from another application, this field links that information to its original source file using DDE.

Examples

Shows how to insert linked objects as LINK, DDE and DDEAUTO fields and present them within the document in different ways.

public void FieldLinkedObjectsAsText(InsertLinkedObjectAs insertLinkedObjectAs)
{
    Document doc = new Document();
    DocumentBuilder builder = new DocumentBuilder(doc);

    // Insert fields containing text from another document and present them as text (see InsertLinkedObjectAs enum)
    builder.Writeln("FieldLink:\n");
    InsertFieldLink(builder, insertLinkedObjectAs, "Word.Document.8", MyDir + "Document.docx", null, true);

    builder.Writeln("FieldDde:\n");
    InsertFieldDde(builder, insertLinkedObjectAs, "Excel.Sheet", MyDir + "Spreadsheet.xlsx",
        "Sheet1!R1C1", true, true);

    builder.Writeln("FieldDdeAuto:\n");
    InsertFieldDdeAuto(builder, insertLinkedObjectAs, "Excel.Sheet", MyDir + "Spreadsheet.xlsx",
        "Sheet1!R1C1", true);

    doc.UpdateFields();
    doc.Save(ArtifactsDir + "Field.LINK.DDE.DDEAUTO.docx");
}

public void FieldLinkedObjectsAsImage(InsertLinkedObjectAs insertLinkedObjectAs)
{
    Document doc = new Document();
    DocumentBuilder builder = new DocumentBuilder(doc);

    // Insert one cell from a spreadsheet as an image (see InsertLinkedObjectAs enum)
    builder.Writeln("FieldLink:\n");
    InsertFieldLink(builder, insertLinkedObjectAs, "Excel.Sheet", MyDir + "MySpreadsheet.xlsx",
        "Sheet1!R2C2", true);

    builder.Writeln("FieldDde:\n");
    InsertFieldDde(builder, insertLinkedObjectAs, "Excel.Sheet", MyDir + "Spreadsheet.xlsx",
        "Sheet1!R1C1", true, true);

    builder.Writeln("FieldDdeAuto:\n");
    InsertFieldDdeAuto(builder, insertLinkedObjectAs, "Excel.Sheet", MyDir + "Spreadsheet.xlsx",
        "Sheet1!R1C1", true);

    doc.UpdateFields();
    doc.Save(ArtifactsDir + "Field.LINK.DDE.DDEAUTO.AsImage.docx");
}

/// <summary>
/// Use a document builder to insert a LINK field and set its properties according to parameters.
/// </summary>
private static void InsertFieldLink(DocumentBuilder builder, InsertLinkedObjectAs insertLinkedObjectAs,
    string progId, string sourceFullName, string sourceItem, bool shouldAutoUpdate)
{
    FieldLink field = (FieldLink)builder.InsertField(FieldType.FieldLink, true);

    switch (insertLinkedObjectAs)
    {
        case InsertLinkedObjectAs.Text:
            field.InsertAsText = true;
            break;
        case InsertLinkedObjectAs.Unicode:
            field.InsertAsUnicode = true;
            break;
        case InsertLinkedObjectAs.Html:
            field.InsertAsHtml = true;
            break;
        case InsertLinkedObjectAs.Rtf:
            field.InsertAsRtf = true;
            break;
        case InsertLinkedObjectAs.Picture:
            field.InsertAsPicture = true;
            break;
        case InsertLinkedObjectAs.Bitmap:
            field.InsertAsBitmap = true;
            break;
    }

    field.AutoUpdate = shouldAutoUpdate;
    field.ProgId = progId;
    field.SourceFullName = sourceFullName;
    field.SourceItem = sourceItem;

    builder.Writeln("\n");
}

/// <summary>
/// Use a document builder to insert a DDE field and set its properties according to parameters.
/// </summary>
private static void InsertFieldDde(DocumentBuilder builder, InsertLinkedObjectAs insertLinkedObjectAs, string progId,
    string sourceFullName, string sourceItem, bool isLinked, bool shouldAutoUpdate)
{
    FieldDde field = (FieldDde)builder.InsertField(FieldType.FieldDDE, true);

    switch (insertLinkedObjectAs)
    {
        case InsertLinkedObjectAs.Text:
            field.InsertAsText = true;
            break;
        case InsertLinkedObjectAs.Unicode:
            field.InsertAsUnicode = true;
            break;
        case InsertLinkedObjectAs.Html:
            field.InsertAsHtml = true;
            break;
        case InsertLinkedObjectAs.Rtf:
            field.InsertAsRtf = true;
            break;
        case InsertLinkedObjectAs.Picture:
            field.InsertAsPicture = true;
            break;
        case InsertLinkedObjectAs.Bitmap:
            field.InsertAsBitmap = true;
            break;
    }

    field.AutoUpdate = shouldAutoUpdate;
    field.ProgId = progId;
    field.SourceFullName = sourceFullName;
    field.SourceItem = sourceItem;
    field.IsLinked = isLinked;

    builder.Writeln("\n");
}

/// <summary>
/// Use a document builder to insert a DDEAUTO field and set its properties according to parameters.
/// </summary>
private static void InsertFieldDdeAuto(DocumentBuilder builder, InsertLinkedObjectAs insertLinkedObjectAs,
    string progId, string sourceFullName, string sourceItem, bool isLinked)
{
    FieldDdeAuto field = (FieldDdeAuto)builder.InsertField(FieldType.FieldDDEAuto, true);

    switch (insertLinkedObjectAs)
    {
        case InsertLinkedObjectAs.Text:
            field.InsertAsText = true;
            break;
        case InsertLinkedObjectAs.Unicode:
            field.InsertAsUnicode = true;
            break;
        case InsertLinkedObjectAs.Html:
            field.InsertAsHtml = true;
            break;
        case InsertLinkedObjectAs.Rtf:
            field.InsertAsRtf = true;
            break;
        case InsertLinkedObjectAs.Picture:
            field.InsertAsPicture = true;
            break;
        case InsertLinkedObjectAs.Bitmap:
            field.InsertAsBitmap = true;
            break;
    }

    field.ProgId = progId;
    field.SourceFullName = sourceFullName;
    field.SourceItem = sourceItem;
    field.IsLinked = isLinked;
}

public enum InsertLinkedObjectAs
{
    // LinkedObjectAsText
    Text,
    Unicode,
    Html,
    Rtf,
    // LinkedObjectAsImage
    Picture,
    Bitmap
}

Reference

Aspose.Words.Fields Namespace