Change the selected value of Asp.Net DropDownList with jQuery

In ASP.NET web development, the DropDownList control provides a convenient way to create dropdown lists with data binding capabilities. If you need to change the selected value of a DropDownList dynamically, jQuery can be employed to accomplish this task efficiently. In this guide, we'll walk you through the process of changing the selected value of an ASP.NET DropDownList using jQuery.

Steps to Change the Selected Value:

Follow these straightforward steps to change the selected value of an ASP.NET DropDownList using jQuery:

  1. ASP.NET DropDownList Setup:

    • Drag and drop a DropDownList control onto your ASP.NET web form or create it programmatically in the code-behind file.
    • Populate the DropDownList with items either statically or dynamically from a data source.
  2. jQuery Code:

    • Write jQuery code to target the DropDownList by its ID or CSS class.
    • Use the .val() function to set the desired value as the selected option.

Example Code:

Below is an example demonstrating how you can implement the aforementioned steps in your ASP.NET application:

    <asp:DropDownList ID="ddlOptions" runat="server">
    <asp:ListItem Text="Option 1" Value="option1"></asp:ListItem>
    <asp:ListItem Text="Option 2" Value="option2"></asp:ListItem>
    <asp:ListItem Text="Option 3" Value="option3"></asp:ListItem>
  // Change the selected value to "option2"
  $("#<%= ddlOptions.ClientID %>").val("option2");

By following the steps explained in this tutorial and utilizing jQuery, you can easily change the selected value of an ASP.NET DropDownList in your web applications. This functionality enhances the interactivity of your web forms and allows for dynamic manipulation of user-selected options.

Asp.Net Ajax Control Toolkit tutorials.

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