FieldSkipIf

FieldSkipIf class

Implements the SKIPIF field.

public class FieldSkipIf : Field

Constructors

Name Description
FieldSkipIf() The default constructor.

Properties

Name Description
ComparisonOperator { get; set; } Gets or sets the comparison operator.
DisplayResult { get; } Gets the text that represents the displayed field result.
End { get; } Gets the node that represents the field end.
Format { get; } Gets a FieldFormat object that provides typed access to field’s formatting.
IsDirty { get; set; } Gets or sets whether the current result of the field is no longer correct (stale) due to other modifications made to the document.
IsLocked { get; set; } Gets or sets whether the field is locked (should not recalculate its result).
LeftExpression { get; set; } Gets or sets the left part of the comparison expression.
LocaleId { get; set; } Gets or sets the LCID of the field.
Result { get; set; } Gets or sets text that is between the field separator and field end.
RightExpression { get; set; } Gets or sets the right part of the comparison expression.
Separator { get; } Gets the node that represents the field separator. Can be null.
Start { get; } Gets the node that represents the start of the field.
virtual Type { get; } Gets the Microsoft Word field type.

Methods

Name Description
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.
GetFieldCode(bool) Returns text between field start and field separator (or field end if there is no separator).
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.
Unlink() Performs the field unlink.
Update() Performs the field update. Throws if the field is being updated already.
Update(bool) Performs a field update. Throws if the field is being updated already.

Remarks

Compares the values designated by the expressions LeftExpression and RightExpression in comparison using the operator designated by ComparisonOperator. If the comparison is true, SKIPIF cancels the current merge document, moves to the next data record in the data source, and starts a new merge document. If the comparison is false, the current merge document is continued.

Examples

Shows how to skip pages in a mail merge using the SKIPIF field.

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

// Insert a SKIPIF field. If the current row of a mail merge operation fulfills the condition
// which the expressions of this field state, then the mail merge operation aborts the current row,
// discards the current merge document, and then immediately moves to the next row to begin the next merge document.
FieldSkipIf fieldSkipIf = (FieldSkipIf) builder.InsertField(FieldType.FieldSkipIf, true);

// Move the builder to the SKIPIF field's separator so we can place a MERGEFIELD inside the SKIPIF field.
builder.MoveTo(fieldSkipIf.Separator);
FieldMergeField fieldMergeField = (FieldMergeField)builder.InsertField(FieldType.FieldMergeField, true);
fieldMergeField.FieldName = "Department";

// The MERGEFIELD refers to the "Department" column in our data table. If a row from that table
// has a value of "HR" in its "Department" column, then this row will fulfill the condition.
fieldSkipIf.LeftExpression = "=";
fieldSkipIf.RightExpression = "HR";

// Add content to our document, create the data source, and execute the mail merge.
builder.MoveToDocumentEnd();
builder.Write("Dear ");
fieldMergeField = (FieldMergeField)builder.InsertField(FieldType.FieldMergeField, true);
fieldMergeField.FieldName = "Name";
builder.Writeln(", ");

// This table has three rows, and one of them fulfills the condition of our SKIPIF field. 
// The mail merge will produce two pages.
DataTable table = new DataTable("Employees");
table.Columns.Add("Name");
table.Columns.Add("Department");
table.Rows.Add("John Doe", "Sales");
table.Rows.Add("Jane Doe", "Accounting");
table.Rows.Add("John Cardholder", "HR");

doc.MailMerge.Execute(table);
doc.Save(ArtifactsDir + "Field.SKIPIF.docx");

Shows how to use MERGEREC and MERGESEQ fields to the number and count mail merge records in a mail merge’s output documents.

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

builder.Write("Dear ");
FieldMergeField fieldMergeField = (FieldMergeField)builder.InsertField(FieldType.FieldMergeField, true);
fieldMergeField.FieldName = "Name";
builder.Writeln(",");

// A MERGEREC field will print the row number of the data being merged in every merge output document.
builder.Write("\nRow number of record in data source: ");
FieldMergeRec fieldMergeRec = (FieldMergeRec)builder.InsertField(FieldType.FieldMergeRec, true);

Assert.AreEqual(" MERGEREC ", fieldMergeRec.GetFieldCode());

// A MERGESEQ field will count the number of successful merges and print the current value on each respective page.
// If a mail merge skips no rows and invokes no SKIP/SKIPIF/NEXT/NEXTIF fields, then all merges are successful.
// The MERGESEQ and MERGEREC fields will display the same results of their mail merge was successful.
builder.Write("\nSuccessful merge number: ");
FieldMergeSeq fieldMergeSeq = (FieldMergeSeq)builder.InsertField(FieldType.FieldMergeSeq, true);

Assert.AreEqual(" MERGESEQ ", fieldMergeSeq.GetFieldCode());

// Insert a SKIPIF field, which will skip a merge if the name is "John Doe".
FieldSkipIf fieldSkipIf = (FieldSkipIf)builder.InsertField(FieldType.FieldSkipIf, true);
builder.MoveTo(fieldSkipIf.Separator);
fieldMergeField = (FieldMergeField)builder.InsertField(FieldType.FieldMergeField, true);
fieldMergeField.FieldName = "Name";
fieldSkipIf.LeftExpression = "=";
fieldSkipIf.RightExpression = "John Doe";

// Create a data source with 3 rows, one of them having "John Doe" as a value for the "Name" column.
// Since a SKIPIF field will be triggered once by that value, the output of our mail merge will have 2 pages instead of 3.
// On page 1, the MERGESEQ and MERGEREC fields will both display "1".
// On page 2, the MERGEREC field will display "3" and the MERGESEQ field will display "2".
DataTable table = new DataTable("Employees");
table.Columns.Add("Name");
table.Rows.Add(new[] { "Jane Doe" });
table.Rows.Add(new[] { "John Doe" });
table.Rows.Add(new[] { "Joe Bloggs" });

doc.MailMerge.Execute(table);
doc.Save(ArtifactsDir + "Field.MERGEREC.MERGESEQ.docx");

See Also