public void MailMergeAndConditionalField()
{
//ExStart:MailMergeAndConditionalField
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
// Insert a MERGEFIELD nested inside an IF field.
// Since the IF field statement is false, the result of the inner MERGEFIELD will not be displayed,
// and the MERGEFIELD will not receive any data during a mail merge.
FieldIf fieldIf = (FieldIf)builder.InsertField(" IF 1 = 2 ");
builder.MoveTo(fieldIf.Separator);
builder.InsertField(" MERGEFIELD FullName ");
// We can still count MERGEFIELDs inside false-statement IF fields if we set this flag to true.
doc.MailMerge.UnconditionalMergeFieldsAndRegions = true;
DataTable dataTable = new DataTable();
dataTable.Columns.Add("FullName");
dataTable.Rows.Add("James Bond");
doc.MailMerge.Execute(dataTable);
// The result will not be visible in the document because the IF field is false,
// but the inner MERGEFIELD did indeed receive data.
doc.Save(ArtifactsDir + "WorkingWithFields.MailMergeAndConditionalField.docx");
//ExEnd:MailMergeAndConditionalField
}
public static void Run()
{
// ExStart:EvaluateIFCondition
DocumentBuilder builder = new DocumentBuilder();
FieldIf field = (FieldIf)builder.InsertField("IF 1 = 1", null);
FieldIfComparisonResult actualResult = field.EvaluateCondition();
Console.WriteLine(actualResult);
// ExEnd:EvaluateIFCondition
Console.WriteLine("\nEvaluates the IF condition successfully.");
}
public void FieldIf()
{
//ExStart
//ExFor:FieldIf
//ExFor:FieldIf.ComparisonOperator
//ExFor:FieldIf.EvaluateCondition
//ExFor:FieldIf.FalseText
//ExFor:FieldIf.LeftExpression
//ExFor:FieldIf.RightExpression
//ExFor:FieldIf.TrueText
//ExFor:FieldIfComparisonResult
//ExSummary:Shows how to insert an if field.
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
builder.Write("Statement 1: ");
// Use document builder to insert an if field
FieldIf fieldIf = (FieldIf)builder.InsertField(FieldType.FieldIf, true);
// The if field will output either the TrueText or FalseText string into the document, depending on the truth of the statement
// In this case, "0 = 1" is incorrect, so the output will be "False"
fieldIf.LeftExpression = "0";
fieldIf.ComparisonOperator = "=";
fieldIf.RightExpression = "1";
fieldIf.TrueText = "True";
fieldIf.FalseText = "False";
Assert.AreEqual(" IF 0 = 1 True False", fieldIf.GetFieldCode());
Assert.AreEqual(FieldIfComparisonResult.False, fieldIf.EvaluateCondition());
// This time, the statement is correct, so the output will be "True"
builder.Write("\nStatement 2: ");
fieldIf = (FieldIf)builder.InsertField(FieldType.FieldIf, true);
fieldIf.LeftExpression = "5";
fieldIf.ComparisonOperator = "=";
fieldIf.RightExpression = "2 + 3";
fieldIf.TrueText = "True";
fieldIf.FalseText = "False";
Assert.AreEqual(" IF 5 = \"2 + 3\" True False", fieldIf.GetFieldCode());
Assert.AreEqual(FieldIfComparisonResult.True, fieldIf.EvaluateCondition());
doc.UpdateFields();
doc.Save(MyDir + @"\Artifacts\Field.If.docx");
}