Asp net searchable dropdownlist

ASP.NET is a widely used programming language for developing web applications. One common requirement in web development is to have a searchable dropdownlist, where can easily and select an option from a large list of items. In this article, we will explore how to a searchable dropdownlist in ASP.NET using examples.

To with, let's take a look at the basic structure of an ASP.NET page. Here is a ASP.NET code snippet:

    Searchable Dropdownlist


In the above code, we have a simple ASP.NET page with a dropdownlist control “ddlItems”. Now, let's move on to implementing the searchable .

To make the dropdownlist searchable, we can use a combination of and ASP.NET. We will use JavaScript to handle the search functionality and ASP.NET to populate the dropdownlist with data.

First, let's add some sample data to the dropdownlist. We can do this in the code-behind file (Default.aspx.cs) using the Page_Load event:

protected void Page_Load(object sender, EventArgs e)
    if (!IsPostBack)
        ddlItems.Items.Add(new ListItem("Item 1", "1"));
        ddlItems.Items.Add(new ListItem("Item 2", "2"));
        ddlItems.Items.Add(new ListItem("Item 3", "3"));
        ddlItems.Items.Add(new ListItem("Item 4", "4"));
        ddlItems.Items.Add(new ListItem("Item 5", "5"));

Now, let's add the JavaScript code to make the dropdownlist searchable. We can use the jQuery library for this purpose. Here is the JavaScript code:

In the above code, we have included the jQuery library and used the select2 plugin to enhance the dropdownlist with search functionality.

Now, if you run the ASP.NET page, you will see a dropdownlist with the provided sample data. You can start typing in the dropdownlist, and it will filter the options on the entered text.


In this article, we have explored how to implement a searchable dropdownlist in ASP.NET. We have used JavaScript and the select2 plugin to this functionality. By following the examples provided, you can easily implement a searchable dropdownlist in your ASP.NET web application.

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