C# 在asp.net中从arraylist中移动元素

我有一个项目，我坚持这件事。我想在html表格中只显示三行页面上的报警。目前我有三个表格，但我想显示多个表4、表5、表6等

这是我的项目代码：

public ArrayList myArr = new ArrayList();

public static string alarma_valoare { get; set; }
public static string alarma_denumire_punct { get; set; }
public static string alarma_timp  { get; set; }
public static string alarma_mesaj { get; set; }


protected void Page_Load(object sender, EventArgs e)
{
    PresSelect();
    TempSelect();
    DebSelect();
    DataDisplay();
}

public void PresSelect()
{

    string query = "String table1";

    dt = GetData(query);

    if (dt.Rows.Count > 0)
    {
        for (int i = 0; i < dt.Rows.Count; i++)
        {
            alarm_value = dt.Rows[i]["value"].ToString();
            alarm_n = dt.Rows[i]["value1"].ToString();
            alarma_date = dt.Rows[i]["value2"].ToString();
            alarma_text = dt.Rows[i]["value3"].ToString();



           if (float.Parse(alarm_value) > 11)
            {

                myAr.Add(float.Parse(alarm_value));
                myAr.Add(alarm_n.ToString());
                myAr.Add(alarma_date.ToString());
                myAr.Add(alarma_text.ToString());



            }
            else if (float.Parse(alarm_value) < 11)
            {

                myAr.Add(float.Parse(alarm_value));
                myAr.Add(alarm_n.ToString());
                myAr.Add(alarma_date.ToString());
                myAr.Add(alarma_text.ToString());
            }
         }
    }
}

public void TempSelect()
{

    string query = "string  table2";

    dt = GetData(query);

    if (dt.Rows.Count > 0)
    {
        for (int j = 0; j < dt.Rows.Count; j++)
        {

            alarm_value = dt.Rows[j]["value"].ToString();             
            alarm_n = dt.Rows[j]["value1"].ToString();
            alarma_date = dt.Rows[j]["value2"].ToString();
            alarma_text = dt.Rows[j]["value3"].ToString();

             if (float.Parse(alarm_value) > 22)
            {

                myAr.Add(float.Parse(alarm_value));
                myAr.Add(alarm_n.ToString());
                myAr.Add(alarma_date.ToString());
                myAr.Add(alarma_text.ToString());
            }
            else if (float.Parse(alarm_value) < 22)
           {
                myAr.Add(float.Parse(alarm_value));
                myAr.Add(alarm_n.ToString());
                myAr.Add(alarma_date.ToString());
                myAr.Add(alarma_text.ToString());
            }
        }
    }

}

public void DebSelect()
{

    string query = "String table3";

    dt = GetData(query);

    if (dt.Rows.Count > 0)
    {
        for (int y = 0; y < dt.Rows.Count; y++)
        {


             alarm_n = dt.Rows[y]["value1"].ToString();
             alarma_date = dt.Rows[y]["value2"].ToString();
             alarma_text = dt.Rows[y]["value3"].ToString();

            if (float.Parse(alarm_value) >33)
            {

                    myAr.Add(float.Parse(alarm_value));
                    myAr.Add(alarm_n.ToString());
                    myAr.Add(alarma_date.ToString());
                    myAr.Add(alarma_text.ToString());
            }
            else if (float.Parse(alarm_value) < 33 )
            {

                myAr.Add(float.Parse(alarm_value));
                myAr.Add(alarm_n.ToString());
                myAr.Add(alarma_date.ToString());
                myAr.Add(alarma_text.ToString());
            }
        }
    }

}

public void DataDisplay()
{


    //in this function I want to display data in my html table

 }



private static DataTable GetData(string query)
{
    DataTable dt = new DataTable();
    string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
    {

        using (SqlCommand cmd = new SqlCommand(query))
        {
            cmd.CommandTimeout = 0;
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.CommandType = CommandType.Text;
                cmd.Connection = con;
                sda.SelectCommand = cmd;
                sda.Fill(dt);

            }
        }

        return dt;
    }
    SqlConnection.ClearAllPools();
}               

结束我想在html表格中显示如下内容：

[0]  value - from table1
[1]  value1 - from table1
[2]  value2 - from table1
[3]  value3 - from table1

[4]  value - from table2
[5]  value1 - from table2
[6]  value2 - from table2
[7]  value3 - from table2

[8]  value - from table3
[9]  value1 - from table3
[10] value2 - from table3
[11] value3 - from table3

Value/name                Date                           Message   
value/value1(T1)        value2(T1)                       value3(T1)
value/value1(T2)        value2(T2)                       value3(T2)
value/value1(T3)        value2(T3)                       value3(T3)

 [0]  value - from table3
 [1]  value - from table3
 [2]  value - from table3
 [3]  value - from table3

 [4]  value - from table1
 [5]  value - from table1
 [6]  value - from table1
 [7]  value - from table1

 [8]  value - from table2
 [9]  value - from table2
 [10] value - from table2
 [11] value - from table2

 Value/name                Date                           Message   
 value/value1(T3)        value2(T3)                       value3(T3)
 value/value1(T1)        value2(T1)                       value3(T1)
 value/value1(T2)        value2(T2)                       value3(T2)

  [11]  value - from table3
  [10]  value - from table3
  [9]  value - from table3
  [8]  value - from table3

  [7]  value - from table2
  [6]  value - from table2
  [5]  value - from table2
  [4]  value - from table2

  [3]  value - from table1
  [2]  value - from table1
  [1] value - from table1
  [0] value - from table1
//First element

  [11]  value - from table4
  [10]  value - from table4
  [9]  value - from table4
  [8]  value - from table4

  [7]  value - from table3
  [6]  value - from table3
  [5]  value - from table3
  [4]  value - from table3

  [3]  value - from table2
  [2]  value - from table2
  [1] value - from table2
  [0] value - from table2
    //First element

当数据库中出现table3 my array的新值时，我希望如下所示：

[0]  value - from table1
[1]  value1 - from table1
[2]  value2 - from table1
[3]  value3 - from table1

[4]  value - from table2
[5]  value1 - from table2
[6]  value2 - from table2
[7]  value3 - from table2

[8]  value - from table3
[9]  value1 - from table3
[10] value2 - from table3
[11] value3 - from table3

Value/name                Date                           Message   
value/value1(T1)        value2(T1)                       value3(T1)
value/value1(T2)        value2(T2)                       value3(T2)
value/value1(T3)        value2(T3)                       value3(T3)

 [0]  value - from table3
 [1]  value - from table3
 [2]  value - from table3
 [3]  value - from table3

 [4]  value - from table1
 [5]  value - from table1
 [6]  value - from table1
 [7]  value - from table1

 [8]  value - from table2
 [9]  value - from table2
 [10] value - from table2
 [11] value - from table2

 Value/name                Date                           Message   
 value/value1(T3)        value2(T3)                       value3(T3)
 value/value1(T1)        value2(T1)                       value3(T1)
 value/value1(T2)        value2(T2)                       value3(T2)

  [11]  value - from table3
  [10]  value - from table3
  [9]  value - from table3
  [8]  value - from table3

  [7]  value - from table2
  [6]  value - from table2
  [5]  value - from table2
  [4]  value - from table2

  [3]  value - from table1
  [2]  value - from table1
  [1] value - from table1
  [0] value - from table1
//First element

  [11]  value - from table4
  [10]  value - from table4
  [9]  value - from table4
  [8]  value - from table4

  [7]  value - from table3
  [6]  value - from table3
  [5]  value - from table3
  [4]  value - from table3

  [3]  value - from table2
  [2]  value - from table2
  [1] value - from table2
  [0] value - from table2
    //First element

和表2中的另一个值

  [0]  value - from table2
  [1]  value - from table2
  [2]  value - from table2
  [3]  value - from table2

  [4]  value - from table3
  [5]  value - from table3
  [6]  value - from table3
  [7]  value - from table3

  [8]  value - from table1
  [9]  value - from table1
  [10] value - from table1
  [11] value - from table1

  Value/name                Date                           Message   
 value/value1(T2)        value2(T2)                       value3(T2)
 value/value1(T3)        value2(T3)                       value3(T3)
 value/value1(T1)        value2(T1)                       value3(T1)

我想移动myarraylist中的元素并显示在html表中，这是我现在想从数据库中为三个表做的事情，但将来我会有多个表

---

对不起，我的英语不好，如果我不懂，我会尽量解释得更好。

我想你可以排队

让我解释一下。如果您有一个队列（您可以进行一些检查，以确保始终有12个元素），并且您开始对值进行排队，您将得到如下结果：

[0]  value - from table1
[1]  value1 - from table1
[2]  value2 - from table1
[3]  value3 - from table1

[4]  value - from table2
[5]  value1 - from table2
[6]  value2 - from table2
[7]  value3 - from table2

[8]  value - from table3
[9]  value1 - from table3
[10] value2 - from table3
[11] value3 - from table3

Value/name                Date                           Message   
value/value1(T1)        value2(T1)                       value3(T1)
value/value1(T2)        value2(T2)                       value3(T2)
value/value1(T3)        value2(T3)                       value3(T3)

 [0]  value - from table3
 [1]  value - from table3
 [2]  value - from table3
 [3]  value - from table3

 [4]  value - from table1
 [5]  value - from table1
 [6]  value - from table1
 [7]  value - from table1

 [8]  value - from table2
 [9]  value - from table2
 [10] value - from table2
 [11] value - from table2

 Value/name                Date                           Message   
 value/value1(T3)        value2(T3)                       value3(T3)
 value/value1(T1)        value2(T1)                       value3(T1)
 value/value1(T2)        value2(T2)                       value3(T2)

  [11]  value - from table3
  [10]  value - from table3
  [9]  value - from table3
  [8]  value - from table3

  [7]  value - from table2
  [6]  value - from table2
  [5]  value - from table2
  [4]  value - from table2

  [3]  value - from table1
  [2]  value - from table1
  [1] value - from table1
  [0] value - from table1
//First element

  [11]  value - from table4
  [10]  value - from table4
  [9]  value - from table4
  [8]  value - from table4

  [7]  value - from table3
  [6]  value - from table3
  [5]  value - from table3
  [4]  value - from table3

  [3]  value - from table2
  [2]  value - from table2
  [1] value - from table2
  [0] value - from table2
    //First element

然后，如果您得到一个新值：

使用Dequeue（）4次，您将得到以下结果：

  [7]  value - from table3
  [6]  value - from table3
  [5]  value - from table3
  [4]  value - from table3

  [3]  value - from table2
  [2]  value - from table2
  [1]  value - from table2
  [0]  value - from table2
//First element

然后对四个新值使用Enqueue（），您将得到如下结果：

[0]  value - from table1
[1]  value1 - from table1
[2]  value2 - from table1
[3]  value3 - from table1

[4]  value - from table2
[5]  value1 - from table2
[6]  value2 - from table2
[7]  value3 - from table2

[8]  value - from table3
[9]  value1 - from table3
[10] value2 - from table3
[11] value3 - from table3

Value/name                Date                           Message   
value/value1(T1)        value2(T1)                       value3(T1)
value/value1(T2)        value2(T2)                       value3(T2)
value/value1(T3)        value2(T3)                       value3(T3)

 [0]  value - from table3
 [1]  value - from table3
 [2]  value - from table3
 [3]  value - from table3

 [4]  value - from table1
 [5]  value - from table1
 [6]  value - from table1
 [7]  value - from table1

 [8]  value - from table2
 [9]  value - from table2
 [10] value - from table2
 [11] value - from table2

 Value/name                Date                           Message   
 value/value1(T3)        value2(T3)                       value3(T3)
 value/value1(T1)        value2(T1)                       value3(T1)
 value/value1(T2)        value2(T2)                       value3(T2)

  [11]  value - from table3
  [10]  value - from table3
  [9]  value - from table3
  [8]  value - from table3

  [7]  value - from table2
  [6]  value - from table2
  [5]  value - from table2
  [4]  value - from table2

  [3]  value - from table1
  [2]  value - from table1
  [1] value - from table1
  [0] value - from table1
//First element

  [11]  value - from table4
  [10]  value - from table4
  [9]  value - from table4
  [8]  value - from table4

  [7]  value - from table3
  [6]  value - from table3
  [5]  value - from table3
  [4]  value - from table3

  [3]  value - from table2
  [2]  value - from table2
  [1] value - from table2
  [0] value - from table2
    //First element

明白了吗？；） 我想这可能是解决你问题的办法

以下是想法：

Queue<string> queue = new Queue<string>();

            queue.Enqueue("prueba1");
            queue.Enqueue("prueba2");
            queue.Enqueue("prueba3");
            queue.Enqueue("prueba4");

            queue.Enqueue("prueba5");
            queue.Enqueue("prueba6");
            queue.Enqueue("prueba7");
            queue.Enqueue("prueba8");

            queue.Enqueue("prueba9");
            queue.Enqueue("prueba10");
            queue.Enqueue("prueba11");
            queue.Enqueue("prueba12");

            if (queue.Count == 12)
            {
                queue.Dequeue();
                queue.Dequeue();
                queue.Dequeue();
                queue.Dequeue();
                queue.Enqueue("prueba13");
                queue.Enqueue("prueba14");
                queue.Enqueue("prueba15");
                queue.Enqueue("prueba16");
            }

Queue Queue=new Queue（）；
排队。排队（“prueba1”）；
排队。排队（“prueba2”）；
排队。排队（“prueba3”）；
排队。排队（“prueba4”）；
排队。排队（“prueba5”）；
排队。排队（“prueba6”）；
排队。排队（“prueba7”）；
排队。排队（“prueba8”）；
排队。排队（“prueba9”）；
排队。排队（“prueba10”）；
排队。排队（“prueba11”）；
排队。排队（“prueba12”）；
如果（queue.Count==12）
{
queue.Dequeue（）；
queue.Dequeue（）；
queue.Dequeue（）；
queue.Dequeue（）；
排队。排队（“prueba13”）；
排队。排队（“prueba14”）；
排队。排队（“prueba15”）；
排队。排队（“prueba16”）；
}

我不会为此使用ArrayList。创建一个类来保存数据，并为其提供有意义的属性名称。然后，您可以更改GetData方法以提供这些类的集合，您可以在表示逻辑中使用这些类来填充HTML表

也许像下面这样

class AlarmData {

    public float AlarmValue { get; set; }
    public string AlarmN { get; set; }
    public string AlarmDate { get; set; } // Could even be of type DateTime
    public string AlarmText { get; set; }

}

在您的

DebSelect

、

TempSelect

和

按select

方法中，有大量重复的代码。可能会将其中的大部分移动到GetData方法中，而不是填充arraylist，创建

AlarmData

对象的集合并返回这些对象

然后，您的

DebSelect

、

TempSelect

和

PresSelect

方法只需对返回的数据执行条件逻辑即可

对于您的

DataDisplay

方法，我将研究构建ASP.NET表或div的方法，或者您选择的任何布局内容的方法。如果您真的想这样做，您可以查看自定义业务对象（

AlarmData

）的数据绑定，以进一步简化操作

---

这与您最初的示例有相当大的偏差，但我建议这可能是一个值得的示例。

如果您为我的问题发布一个示例（一个ideea），使用队列和出列来理解这个概念。我认为这很容易。创建队列。然后，在您实际向列表中“添加”元素的行中，检查您的队列是否包含12个元素，如果是，则先将4个元素出列，然后将新元素入列，如果没有足够的空间，则只将新元素入列。我在谷歌上搜索，对这个概念有所了解。现在的问题是我不知道如何在html表中显示这个东西。很抱歉我的新手问题，但我不是程序员，但我必须完成这个项目。对不起，我不知道如何帮助您使用web部件。我不是一个网络开发者。很抱歉，在这个问题上，我只能帮你。