/// <summary>
/// 修改变量
/// </summary>
/// <param name="name">变量名</param>
/// <param name="val">变量值</param>
/// <returns>修改成功返回true，失败返回false</returns>
public bool SetVal(string name, object val)
{
var obj = ValDt.AddOrUpdate(name, val, (key, value) => val);
return(obj != null);
}
