public void TestCreateElementAndRow()
{
DataSet ds = new DataSet("set");
DataTable dt = new DataTable("tab1");
dt.Columns.Add("col1");
dt.Columns.Add("col2");
ds.Tables.Add(dt);
DataTable dt2 = new DataTable("child");
dt2.Columns.Add("ref");
dt2.Columns.Add("val");
ds.Tables.Add(dt2);
DataRelation rel = new DataRelation("rel",
dt.Columns [0], dt2.Columns [0]);
rel.Nested = true;
ds.Relations.Add(rel);
XmlDataDocument doc = new XmlDataDocument(ds);
doc.LoadXml("<set><tab1><col1>1</col1><col2/><child><ref>1</ref><val>aaa</val></child></tab1></set>");
AssertEquals(1, ds.Tables [0].Rows.Count);
AssertEquals(1, ds.Tables [1].Rows.Count);
// document element - no mapped row
XmlElement el = doc.DocumentElement;
AssertNull(doc.GetRowFromElement(el));
// tab1 element - has mapped row
el = el.FirstChild as XmlElement;
DataRow row = doc.GetRowFromElement(el);
AssertNotNull(row);
AssertEquals(DataRowState.Added, row.RowState);
// col1 - it is column. no mapped row
el = el.FirstChild as XmlElement;
row = doc.GetRowFromElement(el);
AssertNull(row);
// col2 - it is column. np mapped row
el = el.NextSibling as XmlElement;
row = doc.GetRowFromElement(el);
AssertNull(row);
// child - has mapped row
el = el.NextSibling as XmlElement;
row = doc.GetRowFromElement(el);
AssertNotNull(row);
AssertEquals(DataRowState.Added, row.RowState);
// created (detached) table 1 element (used later)
el = doc.CreateElement("tab1");
row = doc.GetRowFromElement(el);
AssertEquals(DataRowState.Detached, row.RowState);
AssertEquals(1, dt.Rows.Count); // not added yet
// adding a node before setting EnforceConstraints
// raises an error
try {
doc.DocumentElement.AppendChild(el);
Fail("Invalid Operation should occur; EnforceConstraints prevents addition.");
} catch (InvalidOperationException) {
}
// try again...
ds.EnforceConstraints = false;
AssertEquals(1, dt.Rows.Count); // not added yet
doc.DocumentElement.AppendChild(el);
AssertEquals(2, dt.Rows.Count); // added
row = doc.GetRowFromElement(el);
AssertEquals(DataRowState.Added, row.RowState); // changed
// Irrelevant element
XmlElement el2 = doc.CreateElement("hoge");
row = doc.GetRowFromElement(el2);
AssertNull(row);
// created table 2 element (used later)
el = doc.CreateElement("child");
row = doc.GetRowFromElement(el);
AssertEquals(DataRowState.Detached, row.RowState);
// Adding it to irrelevant element performs no row state change.
AssertEquals(1, dt2.Rows.Count); // not added yet
el2.AppendChild(el);
AssertEquals(1, dt2.Rows.Count); // still not added
row = doc.GetRowFromElement(el);
AssertEquals(DataRowState.Detached, row.RowState); // still detached here
}