/// <summary>
/// 获取更新语句
/// </summary>
/// <param name="filter">将参数化映射到标签中类的主键或其他字段上</param>
/// <returns></returns>
public string UpdateString(MemberInfo[] members, Func <MemberInfo, string> filter = null)
{
var model = _model.CopyInstance();
model.FilterFunction = filter;
MemberInfo[] temp = new MemberInfo[members.Length - 1];
Array.Copy(members, 1, temp, 0, members.Length - 1);
model.LoadMembers(members[0]);
return(_update_template.UpdateWithCondition(model, temp));
}