I am querying a database using C# and creating a DataTable
. From this DataTable
I am using LINQ to XML to create an XML file.
My problem is that for null columns in the data table, when I call SetAttributeValue on an element, it creates a blank attribute. SetAttributeValue(name, value)
doesn't add the attribute at all if value is null
. Is there a way to mimic this behavior for DBNull.Value
? I don't want to check every single row and column to see if the value equals DBNull.Value
.
Expected:
<Root>
<Element1 E1="Test"/>
</Root>
Actual:
<Root>
<Element1 E1="Test" E2=""/>
</Root>
Code for Element1:
DataTable testTable = new DataTable();
testTable.Columns.Add("E1");
testTable.Columns.Add("E2");
testTable.Rows.Add("Test", DBNull.Value);
XElement element = new XElement("Element1");
element.SetAttributeValue("E1", testTable.AsEnumerable().Select(item => item["E1"]));
element.SetAttributeValue("E2", testTable.AsEnumerable().Select(item => item["E2"]));
return element;
Write yourself an extension method:
public static class Extension
{
public static void SetAttributeValueEx(this XElement source, XName name, object value)
{
if (value == DBNull.Value) value = null;
source.SetAttributeValue(name, value);
}
}
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