我正在读取XML data
和检索基于element
. 有一个名为的元素<UniqueColumns>
,它可以有一个名为 的子元素<string>
。我想读取这些值并将其添加到ObservableCollection<String>
. 如果没有值,那么什么都不做。有以下三种情况:
场景 - 1:超过 1 个子元素。
<IndexId>4</IndexId>
<UniqueColumns>
<string>Dir_nbr</string>
<string>Dir_name</string>
</UniqueColumns>
<SelectedTableForUniqColumn>TBDirectory</SelectedTableForUniqColumn>
场景 - 2:只有一个子元素。
<IndexId>4</IndexId>
<UniqueColumns>
<string>Dir_nbr</string>
</UniqueColumns>
<SelectedTableForUniqColumn>TBDirectory</SelectedTableForUniqColumn>
场景 - 3:没有子元素。
<IndexId>4</IndexId>
<UniqueColumns/>
<SelectedTableForUniqColumn>TBDirectory</SelectedTableForUniqColumn>
代码:
//This is a user defined data object and it has parameter which is type of `ObservableCollection<String>`.
ExternalDatabaseTableRequestDO req = new ExternalDatabaseTableRequestDO();
using (XmlTextReader reader = new XmlTextReader(new StringReader(xmlData)))
{
while (reader.Read())
{
int result;
long res;
string parameterValue;
ObservableCollection<String> parameterValueList = new ObservableCollection<String>();
switch (reader.Name.ToLower())
{
case "indexid":
parameterValue = reader.ReadString();
if (!String.IsNullOrWhiteSpace(parameterValue) && Int32.TryParse(parameterValue, out result))
req.IndexId = result;
break;
case "uniquecolumns":
//need loop logic here but not sure how to do that.
if (reader.NodeType == XmlNodeType.Element) // This will give me parent element which is <UniqueColumns>
{
//Stuck here. How to read child elements if exists.
}
break;
case "selectedtableforuniqcolumn":
parameterValue = reader.ReadString();
req.SelectedTableForUniqColumn = parameterValue;
break;
}
}
}
return req;