String

未处理的“System.InvalidCastException”类型的异常出现在 mscorlib.dll 中。

其他信息: At least one element in the source array could not be cast down to the destination array type.

代码：

public ArrayList arr_column = new ArrayList();

StringBuilder column_attr = new StringBuilder();

foreach (XmlElement column in table.SelectNodes("c:Columns/o:Column/*[ name() = 'a:Name' or name() = 'a:Code' or name() = 'a:Comment']", namespaceManager))

{

column_attr.Append(column.InnerText);

}

arr_column.Add(column_attr.tostring()); //必须在导入到arraylist时把StringBuilder转换为String ;

arr_one.AddRange(arr);

arr_one.AddRange(arr_column);

String[] arr_str = arr_one.ToArray(typeof(string)) as string[];

return arr_str;