public string ToFieldName(LambdaExpression field)
{
string dataFieldName = null;
if (field != null)
{
MemberExpression body = field.Body as MemberExpression;
UnaryExpression expression2 = field.Body as UnaryExpression;
if ((body == null) && (expression2 != null))
{
body = expression2.Operand as MemberExpression;
}
if (body != null)
{
Type[] genericArguments = field.Type.GetGenericArguments();
if ((body.Member.MemberType == MemberTypes.Property) && (body.Expression.NodeType == ExpressionType.Parameter))
{
PropertyInfo member = body.Member as PropertyInfo;
if (member != null)
{
dataFieldName = DbObjectTools.GetDataFieldName(genericArguments[0], member);
}
}
}
}
if (string.IsNullOrEmpty(dataFieldName))
{
throw new Exception("無法從 Lambda 表達式 {0} 找到其對應的字段名稱。");
}
return(dataFieldName);
}
