|
private LoadDiffGram ( |
||
| ds | ||
| dataTextReader | ||
| return | void | |
private void ReadXmlDiffgram(XmlReader reader) { // fill correctly
int d = reader.Depth;
bool fEnforce = this.EnforceConstraints;
this.EnforceConstraints =false;
DataTable newDt;
bool isEmpty;
if (this.Rows.Count == 0) {
isEmpty = true;
newDt = this;
}
else {
isEmpty = false;
newDt = this.Clone();
newDt.EnforceConstraints = false;
}
newDt.Rows.nullInList = 0;
reader.MoveToContent();
if ((reader.LocalName != Keywords.DIFFGRAM) && (reader.NamespaceURI != Keywords.DFFNS))
return;
reader.Read();
if (reader.NodeType == XmlNodeType.Whitespace) {
MoveToElement(reader, reader.Depth - 1 /*iCurrentDepth*/); // skip over whitespaces.
}
newDt.fInLoadDiffgram = true;
if (reader.Depth > d) {
if ((reader.NamespaceURI != Keywords.DFFNS) && (reader.NamespaceURI != Keywords.MSDNS)) {
//we should be inside the dataset part
XmlDocument xdoc = new XmlDocument();
XmlElement node = xdoc.CreateElement(reader.Prefix, reader.LocalName, reader.NamespaceURI);
reader.Read();
if (reader.Depth-1 > d) {
XmlDataLoader xmlload = new XmlDataLoader(newDt, false, node, false);
xmlload.isDiffgram = true; // turn on the special processing
xmlload.LoadData(reader);
}
ReadEndElement(reader);
}
if (((reader.LocalName == Keywords.SQL_BEFORE) && (reader.NamespaceURI == Keywords.DFFNS)) ||
((reader.LocalName == Keywords.MSD_ERRORS) && (reader.NamespaceURI == Keywords.DFFNS)))
{
//this will consume the changes and the errors part
XMLDiffLoader diffLoader = new XMLDiffLoader();
diffLoader.LoadDiffGram(newDt, reader);
}
// get to the closing diff tag
while(reader.Depth > d) {
reader.Read();
}
// read the closing tag
ReadEndElement(reader);
}
if (newDt.Rows.nullInList > 0)
throw ExceptionBuilder.RowInsertMissing(newDt.TableName);
newDt.fInLoadDiffgram = false;
List<DataTable> tableList = new List<DataTable>();
tableList.Add(this);
CreateTableList(this, tableList);
// this is terrible, optimize it
for (int i = 0; i < tableList.Count ; i++) {
DataRelation[] relations = tableList[i].NestedParentRelations;
foreach(DataRelation rel in relations) {
if (rel != null && rel.ParentTable == tableList[i]) {
foreach (DataRow r in tableList[i].Rows) {
foreach (DataRelation rel2 in relations) {
r.CheckForLoops(rel2);
}
}
}
}
}
if (!isEmpty) {
this.Merge(newDt);
}
this.EnforceConstraints = fEnforce;
}
private void ReadXmlDiffgram(XmlReader reader) {
IntPtr hscp;
Bid.ScopeEnter(out hscp, "<ds.DataSet.ReadXmlDiffgram|INFO> %d#\n", ObjectID);
try {
int d = reader.Depth;
bool fEnforce = this.EnforceConstraints;
this.EnforceConstraints = false;
DataSet newDs;
bool isEmpty = this.IsEmpty();
if (isEmpty) {
newDs = this;
}
else {
newDs = this.Clone();
newDs.EnforceConstraints = false;
}
foreach (DataTable t in newDs.Tables) {
t.Rows.nullInList = 0;
}
reader.MoveToContent();
if ((reader.LocalName != Keywords.DIFFGRAM) && (reader.NamespaceURI != Keywords.DFFNS))
return;
reader.Read();
if (reader.NodeType == XmlNodeType.Whitespace)
MoveToElement(reader, reader.Depth - 1 /*iCurrentDepth*/); // skip over whitespaces.
newDs.fInLoadDiffgram = true;
if (reader.Depth > d) {
if ((reader.NamespaceURI != Keywords.DFFNS) && (reader.NamespaceURI != Keywords.MSDNS)) {
//we should be inside the dataset part
XmlDocument xdoc = new XmlDocument();
XmlElement node = xdoc.CreateElement(reader.Prefix, reader.LocalName, reader.NamespaceURI);
reader.Read();
if (reader.NodeType == XmlNodeType.Whitespace) {
MoveToElement(reader, reader.Depth - 1 /*iCurrentDepth*/); // skip over whitespaces.
}
if (reader.Depth - 1 > d) {
XmlDataLoader xmlload = new XmlDataLoader(newDs, false, node, false);
xmlload.isDiffgram = true; // turn on the special processing
xmlload.LoadData(reader);
}
ReadEndElement(reader);
if (reader.NodeType == XmlNodeType.Whitespace) {
MoveToElement(reader, reader.Depth - 1 /*iCurrentDepth*/); // skip over whitespaces.
}
}
Debug.Assert(reader.NodeType != XmlNodeType.Whitespace, "Should not be on Whitespace node");
if (((reader.LocalName == Keywords.SQL_BEFORE) && (reader.NamespaceURI == Keywords.DFFNS)) ||
((reader.LocalName == Keywords.MSD_ERRORS) && (reader.NamespaceURI == Keywords.DFFNS)))
{
//this will consume the changes and the errors part
XMLDiffLoader diffLoader = new XMLDiffLoader();
diffLoader.LoadDiffGram(newDs, reader);
}
// get to the closing diff tag
while (reader.Depth > d) {
reader.Read();
}
// read the closing tag
ReadEndElement(reader);
}
foreach (DataTable t in newDs.Tables) {
if (t.Rows.nullInList > 0)
throw ExceptionBuilder.RowInsertMissing(t.TableName);
}
newDs.fInLoadDiffgram = false;
//terrible performance!
foreach (DataTable t in newDs.Tables) {
DataRelation[] nestedParentRelations = t.NestedParentRelations;
foreach (DataRelation rel in nestedParentRelations) {
if (rel.ParentTable == t) {
foreach (DataRow r in t.Rows) {
foreach (DataRelation rel2 in nestedParentRelations) {
r.CheckForLoops(rel2);
}
}
}
}
}
if (!isEmpty) {
this.Merge(newDs);
if (this.dataSetName == "NewDataSet")
this.dataSetName = newDs.dataSetName;
newDs.EnforceConstraints = fEnforce;
}
this.EnforceConstraints = fEnforce;
}
finally {
Bid.ScopeLeave(ref hscp);
}
}