这样的复杂对象的WebService调用为什么出错，怎么改
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ToolboxItem(false)]
public class Service1 : System.Web.Services.WebService
{
[WebMethod]
public TableInfo Table()
{
ColumnInfo[] columns = new ColumnInfo[2];
columns[0].Caption = "c1";
columns[0].Name = "n1";
columns[1].Caption = "c2";
columns[1].Name = "n2";
TableInfo table = new TableInfo();
table.Columns = columns;
return table;
}
[WebMethod]
public int Add()
{
return 0;
}
}
[Serializable]
public class ColumnInfo
{
private string _name;
public string Name
{
get { return _name; }
set { _name = value; }
}
private string _caption;
public string Caption
{
get { return _caption; }
set { _caption = value; }
}
}
[Serializable]
public class TableInfo
{
private ColumnInfo[] _columns;
[XmlArrayItem("ColumnInfo", typeof(ColumnInfo))]
public ColumnInfo[] Columns
{
get { return _columns; }
set { _columns = value; }
}
}