Disable all controls after specified Time with ASP.Net Timer using C# and VB.Net

RichardS...

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User: RichardSa
Posted: on Aug 06, 2021 10:55 PM
Forum: ASP.Net Web Forms
Answer: 1
Views: 4827
Sample Code: Download

How to disabling all control after Time Elapse

I am trying to create an event with timer, when the time elapses the event will be disabled including all its controls.

For example: I want a situation where an Administrator creates an event (like classroom examination) and sets duration for that examination; then other users will register with username and password. When the events starts, the page which has the examination questions will be opened and users can take part in the event (examination).

Then when the time elapse the users can no longer take part because all controls related to that particular examination will be disabled (examination will be closed), and result will be displayed.

Please how can I implement this?

Here is my test code

protected void Page_Load(object sender, EventArgs e)
{
    DataTable dt = new DataTable();
    dt.Columns.Add("EndDate", typeof(DateTime));
    dt.Rows.Add("2021-08-07 00:30:34.943");
    DateTime startDate = DateTime.Now;
    DateTime endDate = Convert.ToDateTime(dt.Rows[0]["EndDate"].ToString());
    LabelTime.Text = CalculateTime(startDate, endDate);
}

public string CalculateTime(DateTime startDate, DateTime endDate)
{
    int days = 0; int hours = 0; int mins = 0; int secs = 0;
    string finalTime = string.Empty;
    if (endDate > startDate)
    {
        days = (endDate - startDate).Days;
        hours = (endDate - startDate).Hours;
        mins = (endDate - startDate).Minutes;
        secs = (endDate - startDate).Seconds;
        finalTime = string.Format("{0} days {1} hours {2} mins {3} secs", days, hours, mins, secs);
    }
    return finalTime;
}

HTML

<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<div class="wrapper">
    <asp:UpdatePanel runat="server">
        <ContentTemplate>
            <asp:Label ID="LabelTime" runat="server" Text=""/>
            <asp:Timer ID="Timer" runat="server" Interval="1000"></asp:Timer>
        </ContentTemplate>
    </asp:UpdatePanel>
</div>

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dharmend...

0 2

Reply
ANSWER
User: dharmendr
Replied: on Aug 07, 2021 01:49 AM
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Hi RichardSa,

Refer below code.

HTML

<asp:ScriptManager runat="server" />
<div class="wrapper">
    <asp:UpdatePanel runat="server">
        <ContentTemplate>
            <asp:Label ID="LabelTime" runat="server" Text="" />
            <asp:Timer ID="timer1" runat="server" OnTick="OnTick" Interval="1000"></asp:Timer>
            <asp:Panel runat="server">
                Name:           
                <asp:TextBox runat="server" ID="txtName" /><br />
                Age:           
                <asp:TextBox runat="server" ID="txtAge" />
            </asp:Panel>
        </ContentTemplate>
    </asp:UpdatePanel>
</div>

Code

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        DisableControls();
    }
}

protected void OnTick(object sender, EventArgs e)
{
    DisableControls();
}

private void DisableControls()
{
    DateTime startDate = DateTime.Now;
    DateTime endDate = Convert.ToDateTime("2021-08-07 00:30:34.943");
    LabelTime.Text = CalculateTime(startDate, endDate);
    // Set Event EndDateTime.
    if (startDate >= endDate)
    {
        txtName.Enabled = false;
        txtAge.Enabled = false;
        // Code to display the result.
    }
}

public string CalculateTime(DateTime startDate, DateTime endDate)
{
    int days = 0; int hours = 0; int mins = 0; int secs = 0;
    string finalTime = string.Empty;
    if (endDate > startDate)
    {
        days = (endDate - startDate).Days;
        hours = (endDate - startDate).Hours;
        mins = (endDate - startDate).Minutes;
        secs = (endDate - startDate).Seconds;
        finalTime = string.Format("{0} days {1} hours {2} mins {3} secs", days, hours, mins, secs);
    }
    return finalTime;
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not IsPostBack Then
        DisableControls()
    End If
End Sub

Protected Sub OnTick(ByVal sender As Object, ByVal e As EventArgs)
    DisableControls()
End Sub

Private Sub DisableControls()
    Dim startDate As DateTime = DateTime.Now
    Dim endDate As DateTime = Convert.ToDateTime("2021-08-07 00:30:34.943")
    LabelTime.Text = CalculateTime(startDate, endDate)
    ' Set Event EndDateTime.
    If startDate >= endDate Then
        txtName.Enabled = False
        txtAge.Enabled = False
        ' Code to display the result.
    End If
End Sub

Public Function CalculateTime(ByVal startDate As DateTime, ByVal endDate As DateTime) As String
    Dim days As Integer = 0
    Dim hours As Integer = 0
    Dim mins As Integer = 0
    Dim secs As Integer = 0
    Dim finalTime As String = String.Empty
    If endDate > startDate Then
        days = (endDate - startDate).Days
        hours = (endDate - startDate).Hours
        mins = (endDate - startDate).Minutes
        secs = (endDate - startDate).Seconds
        finalTime = String.Format("{0} days {1} hours {2} mins {3} secs", days, hours, mins, secs)
    End If

    Return finalTime
End Function

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Disable all controls after specified Time with ASP.Net Timer using C# and VB.Net

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