我有以下用于存储表格定义的xml。如何使用XDocument(C#3.5)遍历传递的tablename的每一列(每个表只出现一次)及其属性
Ex:如果用户通过CurrencySummary,我想读取每一列及其所有属性,如HeaderDescription,HeaderName等。
<?xml version="1.0" encoding="utf-8" ?>
<TableDef>
<CurrencySummary>
<Column Name="Currency" HeaderDescription="Currency" HeaderName="Currency" ColumnType="TableColumnType.Text" IsHidden = "false" Position="0" Width="100" />
<Column Name="ParamortizedValue" HeaderDescription="Par/amortized value" HeaderName="paramortizedvalue" ColumnType="TableColumnType.Number" IsHidden = "false" Position="1" Width="200" />
<Column Name="PercentBondTotal" HeaderDescription="% of bond total" HeaderName="percentbondtotal" ColumnType="TableColumnType.Number" IsHidden = "false" Position="2" Width="150" />
</CurrencySummary>
<CallSchedule>
<Column Name="Calldate" HeaderDescription="Call date" HeaderName="Calldate" ColumnType="TableColumnType.Text" IsHidden = "false" Position="0" Width="100" />
<Column Name="Issue" HeaderDescription="Issue" HeaderName="Issue" ColumnType="TableColumnType.Text" IsHidden = "false" Position="1" Width="100" />
<Column Name="ParamortizedValue" HeaderDescription="Par/amortized value" HeaderName="paramortizedvalue" ColumnType="TableColumnType.Number" IsHidden = "false" Position="2" Width="200" />
<Column Name="PercentBondTotal" HeaderDescription="% of bond total" HeaderName="percentbondtotal" ColumnType="TableColumnType.Number" IsHidden = "false" Position="3" Width="150" />
</CallSchedule>
</TableDef>
我试图通过以下方式实现:(编辑:根据Henk的建议)
var doc = XDocument.Load("TableDefinations.xml");
var cols = doc.Descendants("CurrencySummary").First();
foreach (var col in cols.Elements())
{
foreach (XAttribute at in col.Attributes())
{
//do something with the at.Name and at.Value
}
}
这是有效的方式还是有什么比这更好的?
答案 0 :(得分:5)
这取决于有多少<CurrencySummary>
,以及它们的位置是否重要。
var summ = doc.Descendants("CurrencySummary").First();
foreach (var col in summ.Elements())
...
答案 1 :(得分:5)
编辑 OP不在.Net 4上,所以不使用SelectMany
,如果Single()
没有.Net 4.0替换为First()
看起来你应该只有一个"CurrencySummary"
所以......
var doc = XDocument.Load("TableDefinations.xml");
foreach(XElement col in doc.Descendants("CurrencySummary").Single().Elements())
{
foreach(XAttribute at in col.Attributes())
{
at...
}
}
将迭代遍历TableDefninations.xml中任何位置的唯一CurrencySummary元素中所有元素的所有属性。