4 Ways To Programmatically Add A Row To A Repeating Table In InfoPath

原文:http://www.bizsupportonline.net/infopath2007/4-way-programmatically-add-row-repeating-table.htm by S.Y.M. Wong-A-Ton Learn how to take advantage of the 4 overloads of the AppendChild method to programmatically add rows to repeating tables in InfoPath. InProgrammatically add a row to a repeating table using an XmlWriter objectI wrote about how you can use the XmlWriter object to add a row to a repeating table. While many of you have adopted this way of adding a row to a repeating table, there are several other ways available, which I'll touch upon. All methods to add a row to a repeating table make use of theAppendChildmethod of anXPathNavigatorobject. There are 4 overloads forAppendChild: One that accepts a stringOne that accepts anXPathNavigatorobjectOne that accepts anXmlReaderobjectOne that returns anXmlWriterobject You can use any one of the aforementioned methods forAppendChildto create a new row in a repeating table. All of the examples in this blog post use the XML schema for a repeating table as described inProgrammatically add a row to a repeating table using an XmlWriter object. Method 1 - Use a string to add a row to a repeating table in Infopath In the following sample code the XML for the row is constructed using aStringBuilderobject and then passed to theAppendChildmethod as a string to create the row. string my = NamespaceManager.LookupNamespace("my"); StringBuilder sb = new StringBuilder(); sb.Append(" "); sb.Append(" "); sb.Append("Cell 1"); sb.Append(" "); sb.Append(" "); sb.Append("Cell 2"); sb.Append(" "); sb.Append(" "); sb.Append("Cell 3"); sb.Append(" "); sb.Append(" "); MainDataSource.CreateNavigator().SelectSingleNode( "/my:myFields/my:group1", NamespaceManager).AppendChild(sb.ToString()); Method 2 - Use an XPathNavigator object to add a row to a repeating table in InfoPath In the following sample code anXmlDocumentis used to construct the XML for a row and then an XPathNavigator object is created from the document element of thisXmlDocumentand passed to theAppendChildmethod to create the row. XmlDocument doc = new XmlDocument(); XmlNode group = doc.CreateElement("group2", NamespaceManager.LookupNamespace("my")); XmlNode field = doc.CreateElement("field1", NamespaceManager.LookupNamespace("my")); XmlNode node = group.AppendChild(field); node.InnerText = "Cell 1"; field = doc.CreateElement("field2", NamespaceManager.LookupNamespace("my")); node = group.AppendChild(field); node.InnerText = "Cell 2"; field = doc.CreateElement("field3", NamespaceManager.LookupNamespace("my")); node = group.AppendChild(field); node.InnerText = "Cell 3"; doc.AppendChild(group); MainDataSource.CreateNavigator().SelectSingleNode( "/my:myFields/my:group1", NamespaceManager).AppendChild(doc.DocumentElement.CreateNavigator()); Method 3 - Use an XMLReader object to add a row to a repeating table in InfoPath In the following sample code aFileStreamobject is used to read an XML file that contains the XML structure for a row. It then creates anXmlReaderobject from theFileStreamand passes it to theAppendChildmethod to create the row. Contents of a file namedrow.xmlthat is located on the C-drive: Cell 1 Cell 2 Cell 3 Code to add a row to the repeating table: using (FileStream fs = new FileStream(@"C:\row.xml", FileMode.Open)) { using (XmlReader reader = XmlReader.Create(fs)) { MainDataSource.CreateNavigator().SelectSingleNode( "/my:myFields/my:group1", NamespaceManager).AppendChild(reader); reader.Close(); } fs.Close(); } Method 4 - Use an XmlWriter object to add a row to a repeating table in Infopath Seehttp://www.bizsupportonline.net/infopath2007/programmatically-add-row-repeating-table-xmlwriter.htm