FieldIf class
FieldIf class
Implements the IF field. To learn more, visit the Working with Fields documentation article.
Remarks
Compares the values designated by the expressions FieldIf.left_expression and FieldIf.right_expression in comparison using the operator designated by FieldIf.comparison_operator.
A field in the following format will be used as a mail merge source: { IF 0 = 0 “{PatientsNameFML}” "" \* MERGEFORMAT }
Constructors
| Name | Description |
|---|---|
| FieldIf() | The default constructor. |
Properties
| Name | Description |
|---|---|
| comparison_operator | Gets or sets the comparison operator. |
| display_result | Gets the text that represents the displayed field result. (Inherited from Field) |
| end | Gets the node that represents the field end. (Inherited from Field) |
| false_text | Gets or sets the text displayed if the comparison expression is False. |
| format | Gets a FieldFormat object that provides typed access to field’s formatting. (Inherited from Field) |
| is_dirty | 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) |
| is_locked | Gets or sets whether the field is locked (should not recalculate its result). (Inherited from Field) |
| left_expression | Gets or sets the left part of the comparison expression. |
| locale_id | Gets or sets the LCID of the field. (Inherited from Field) |
| result | Gets or sets text that is between the field separator and field end. (Inherited from Field) |
| right_expression | Gets or sets the right part of the comparison expression. |
| separator | Gets the node that represents the field separator. Can be None.(Inherited from Field) |
| start | Gets the node that represents the start of the field. (Inherited from Field) |
| true_text | Gets or sets the text displayed if the comparison expression is true. |
| type | Gets the Microsoft Word field type. (Inherited from Field) |
Methods
| Name | Description |
|---|---|
| evaluate_condition() | Evaluates the condition. |
| get_field_code() | 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) |
| get_field_code(include_child_field_codes) | Returns text between field start and field separator (or field end if there is no separator). (Inherited from Field) |
| 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 None.(Inherited from Field) |
| 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(ignore_merge_format) | Performs a field update. Throws if the field is being updated already. (Inherited from Field) |
Examples
Shows how to insert an IF field.
doc = aw.Document()
builder = aw.DocumentBuilder(doc)
builder.write("Statement 1: ")
field = builder.insert_field(aw.fields.FieldType.FIELD_IF, True).as_field_if()
field.left_expression = "0"
field.comparison_operator = "="
field.right_expression = "1"
# The IF field will display a string from either its "true_text" property,
# or its "false_text" property, depending on the truth of the statement that we have constructed.
field.true_text = "True"
field.false_text = "False"
field.update()
# In this case, "0 = 1" is incorrect, so the displayed result will be "False".
self.assertEqual(" IF 0 = 1 True False", field.get_field_code())
self.assertEqual(aw.fields.FieldIfComparisonResult.FALSE, field.evaluate_condition())
self.assertEqual("False", field.result)
builder.write("\nStatement 2: ")
field = builder.insert_field(aw.fields.FieldType.FIELD_IF, True).as_field_if()
field.left_expression = "5"
field.comparison_operator = "="
field.right_expression = "2 + 3"
field.true_text = "True"
field.false_text = "False"
field.update()
# This time the statement is correct, so the displayed result will be "True".
self.assertEqual(" IF 5 = \"2 + 3\" True False", field.get_field_code())
self.assertEqual(aw.fields.FieldIfComparisonResult.TRUE, field.evaluate_condition())
self.assertEqual("True", field.result)
doc.update_fields()
doc.save(ARTIFACTS_DIR + "Field.field_if.docx")
See Also
- module aspose.words.fields
- class Field