jeudi 11 octobre 2018

DropDownlist with Checkboxes ASP

It is a reccurent subject : create a dropdowlist with checkboxes..

I followed this tutorial : https://www.c-sharpcorner.com/blogs/multiselect-dropdownlist-with-checkboxes-in-asp-net-with-c-sharp-and-vb-net-using-jquery-plugin

But Still I have the common error : "Uncaught TypeError: $(...).multiSelect is not a function"

Here is the render HTML :

<head>
<title>Listing</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
<link href='/styles/stylesheet.css'
    type="text/css" rel="stylesheet">


<script language="JavaScript" src='/scripts/utilities.js'
    type="text/javascript"></script>

<script language="JavaScript" src='/scripts/sortList.js'
    type="text/javascript"></script>

<script language="javascript" src='/scripts/listingConfirmation.js' 
    type="text/javascript"></script>

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>  
<link href="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.0.3/css/bootstrap.min.css"  
    rel="stylesheet" type="text/css" />  
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.0.3/js/bootstrap.min.js"></script>  
<link href="http://cdn.rawgit.com/davidstutz/bootstrap-multiselect/master/dist/css/bootstrap-multiselect.css"  
    rel="stylesheet" type="text/css" />  
<script src="http://cdn.rawgit.com/davidstutz/bootstrap-multiselect/master/dist/js/bootstrap-multiselect.js"  
    type="text/javascript"></script>  


<script type="text/javascript">
    $(function () {
        $('[id*=lstFruits]').multiSelect({
            includeSelectAllOption: true
        });
        $("#Button1").click(function () {
            alert($(".multiselect-selected-text").html());
        });
    });
</script>

I tried with both "multiSelect" and "multiselect".

Here is the ListBox :

<td>

<asp:ListBox ID="lstFruits" runat="server" SelectionMode="Multiple">
    <asp:ListItem Text="Mango" Value="1" />
    <asp:ListItem Text="Apple" Value="2" />
    <asp:ListItem Text="Banana" Value="3" />
    <asp:ListItem Text="Guava" Value="4" />
    <asp:ListItem Text="Orange" Value="5" />
</asp:ListBox>


<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Submit" />

</td>

The code behind is also done and works :

protected void Submit(object sender, EventArgs e)
{
string message = string.Empty;
foreach (ListItem item in lstFruits.Items)
{
    if (item.Selected)
    {
        message += item.Text + " " + item.Value + "\\n";
    }
}
ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", "alert('" + message + "');", true);
}

The problem : My view still renders a ListBox and NOT a dropdownlist with Checkboxes, plus when I click on one Item it automatically refresh and shows the loading sign (minor problem)

What am I missing ? Why I can't see the dropdownlist as in the tutorial ?




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