如何在ASP.NET中禁用/隐藏/ visibility = false按钮 [英] How to disable / hide / visibility = false button in ASP.NET

问题描述

点击后，24小时后隐藏或禁用按钮。

我点击按钮时已将信息保存在用户数据库中。但现在我想在24小时后隐藏该按钮。

检查我的代码。 Addhour上的红线错误。



我尝试过：

once clicked, hide or disable the button after 24 hour.
i have saved information in database of user when he clicked the button. but now i want to hide that button after 24 hours.
check my code. red line error on Addhour.

What I have tried:

SqlCommand cmd;
           SqlConnection conn = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\Imdad Hussain\documents\visual studio 2012\Projects\FlowerTestPhase\FlowerTestPhase\App_Data\Database1.mdf;Integrated Security=True");
           String emaill = "";
           String OrdrTime = "";
           String querry = "select * from OrderVarify where Uemail='" + Session["Email"].ToString() + "'";
           cmd = new SqlCommand(querry, conn);
           conn.Open();
           SqlDataReader dr = cmd.ExecuteReader();
           while (dr.Read())
           {
               emaill  = dr["Uemail"].ToString();
               OrdrTime = dr["OrderTime"].ToString();

           }
           if (emaill.Equals(Session["Email"].ToString()) && DateTime.Now >= OrdrTime.AddHours(24))
           { //

           }

推荐答案

你好，



我一眼就看到你试图将一个名为AddHours（）的方法调用到一个字符串类型变量。 字符串没有这样的方法;您的变量 OrdrTi​​me 必须是 DateTime 类型，因为所述类型具有AddHours（）方法。

Hi there,

At a glance I see that you are trying to invoke a method called AddHours() to a string type variable. Strings do not have such method; your variable OrdrTime has to be of type DateTime, for said type does have the AddHours() method.

//String OrdrTime = "";
DateTime aver = new DateTime();
....
OrdrTime = Convert.ToDateTime(dr["OrderTime"]);
//or, it depends on what data type you 'select *' is returning
OrdrTime = (DateTime)dr["OrderTime"];
...
if(.... OrdrTime.AddHours(24))
{
    yourButton.Visible = false;
}

希望这会有所帮助。

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