I have created a form in a modal popup with 5 checkboxes where autopostback is set to true. Whenever I click on one of the checkboxes, the modal popup automatically closes.
I have also used an update panel and included ScriptManager.RegisterStartupScript(this, this.GetType(), "Pop", "openModal();", true); in the code behind to reopen the modal popup. However, I do not want the popup to reopen.
How can I achieve this?
It is imperative to reopen the popup each time. When Autopostback occurs, the entire page is refreshed leading to the loss of jquery/javascript variables and modals. To prevent this from happening, utilizing Ajax for communication regarding checkbox selections and corresponding actions is necessary.
Embed your checkboxes within the <asp:UpdatePanel> element:
<asp:UpdatePanel runat="server" ID="updatePanel">
<ContentTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" Text="Checkbox 1" OnCheckedChanged="CheckBox1_CheckedChanged" AutoPostBack="true" />
<asp:CheckBox ID="CheckBox2" runat="server" Text="Checkbox 2" OnCheckedChanged="CheckBox1_CheckedChanged" AutoPostBack="true" />
</ContentTemplate>
</asp:UpdatePanel>
Back-end code:
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
lblResults.Text = String.Empty;
if (CheckBox1.Checked)
lblResults.Text = "Checkbox 1.";
if (CheckBox2.Checked)
lblResults.Text += "Checkbox 2.";
}
.ASPX file:
<head runat="server">
<title></title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.3/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" />
<script type="text/javascript">
$(function () {
$('#messageBox').modal('show');
});
</script>
</head>
<body>
<form id="form1" runat="server">
<div class="modal fade" id="messageBox" role="dialog">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal</h4>
</div>
<div class="modal-body">
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel runat="server" ID="updatePanel">
<ContentTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" Text="Checkbox 1" OnCheckedChanged="CheckBox1_CheckedChanged" AutoPostBack="true" />
<asp:CheckBox ID="CheckBox2" runat="server" Text="Checkbox 2" OnCheckedChanged="CheckBox1_CheckedChanged" AutoPostBack="true" />
<asp:Label runat="server" ID="lblResults" />
</ContentTemplate>
</asp:UpdatePanel>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
</form>
</body>
To ensure smooth page loading, insert the code snippet below before the page loads:
protected void Page_PreInit(object sender, EventArgs e) {
UpdatePanel updatePanel = Master.FindControl("your main Contetnt id") as UpdatePanel;
updatePanel.UpdateMode = UpdatePanelUpdateMode.Conditional;
updatePanel.ChildrenAsTriggers = false;
}
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