Issue with Ajaxfileupload not functioning properly when a dropdownlist is placed within an updatepanel in an ASP.NET environment

Upon loading the page, I can easily use ajaxfileupload to select files for upload. Everything works smoothly until I choose a value from the first dropdown list, causing the second dropdown list inside the updatepanel to populate during the partial postback. After this happens, the select button of the ajaxfileupload control no longer functions. Is this a known issue or is there a way to resolve it?

Answer №1

make sure to assign the ID of the dropdown within the PostBackTrigger property of the update panel.

update:

<UpdatePanel ID="upd1">
    <asp:DropDownList ID="ddl1" onselectedIndexChanged="ddl_changed" />
</UpdatePanel>

<UpdatePanel ID="upd2">
    <Ajax:FileUploader />
</UpdatePanel>

protected void ddl1_changed(object sender, EventArgs e)
{
    //your code

    upd2.Update();
}

Implementing this adjustment can provide assistance to you :)

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