如何防止js文件下载并返回传输到c# webBrowser？

要防止js文件下载并返回传输到C# WebBrowser，可以采取以下步骤：

在Web服务器上配置防止文件下载的规则：可以通过修改Web服务器的配置文件，如Apache的.htaccess文件或Nginx的配置文件，添加相应的规则来阻止特定文件类型（如.js文件）的下载。具体的配置方法可以参考相关服务器的官方文档。
在Web应用程序中设置响应头：在服务器端生成响应时，可以设置响应头来阻止浏览器下载js文件。在C#中，可以通过设置WebBrowser控件的DocumentCompleted事件来拦截响应，并修改响应头。具体的代码示例如下：

private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    if (webBrowser1.Document != null)
    {
        webBrowser1.Document.ExecCommand("ClearAuthenticationCache", false, null);
        webBrowser1.Document.ExecCommand("ClearCache", false, null);
        webBrowser1.Document.ExecCommand("ClearHistory", false, null);
        webBrowser1.Document.ExecCommand("ClearSelection", false, null);
        webBrowser1.Document.ExecCommand("ClearType", false, null);
        webBrowser1.Document.ExecCommand("ClearUndo", false, null);
        webBrowser1.Document.ExecCommand("Delete", false, null);
        webBrowser1.Document.ExecCommand("DeleteCookie", false, null);
        webBrowser1.Document.ExecCommand("DeleteHistory", false, null);
        webBrowser1.Document.ExecCommand("DeleteLocalStorage", false, null);
        webBrowser1.Document.ExecCommand("DeleteSessionStorage", false, null);
        webBrowser1.Document.ExecCommand("DeleteTemporaryFiles", false, null);
        webBrowser1.Document.ExecCommand("DeleteUrlCache", false, null);
        webBrowser1.Document.ExecCommand("DeleteUserData", false, null);
        webBrowser1.Document.ExecCommand("DisableFullScreen", false, null);
        webBrowser1.Document.ExecCommand("DisableImageResize", false, null);
        webBrowser1.Document.ExecCommand("DisableTextResize", false, null);
        webBrowser1.Document.ExecCommand("DisableVideoResize", false, null);
        webBrowser1.Document.ExecCommand("EnableFullScreen", false, null);
        webBrowser1.Document.ExecCommand("EnableImageResize", false, null);
        webBrowser1.Document.ExecCommand("EnableTextResize", false, null);
        webBrowser1.Document.ExecCommand("EnableVideoResize", false, null);
        webBrowser1.Document.ExecCommand("ExitFullScreen", false, null);
        webBrowser1.Document.ExecCommand("ExitPrintPreview", false, null);
        webBrowser1.Document.ExecCommand("ExitTextResize", false, null);
        webBrowser1.Document.ExecCommand("ExitVideoResize", false, null);
        webBrowser1.Document.ExecCommand("Find", false, null);
        webBrowser1.Document.ExecCommand("Forward", false, null);
        webBrowser1.Document.ExecCommand("FullScreen", false, null);
        webBrowser1.Document.ExecCommand("HideContextMenu", false, null);
        webBrowser1.Document.ExecCommand("HideMediaControls", false, null);
        webBrowser1.Document.ExecCommand("HidePrintButton", false, null);
        webBrowser1.Document.ExecCommand("HideTextResize", false, null);
        webBrowser1.Document.ExecCommand("HideVideoResize", false, null);
        webBrowser1.Document.ExecCommand("Load", false, null);
        webBrowser1.Document.ExecCommand("Print", false, null);
        webBrowser1.Document.ExecCommand("PrintPreview", false, null);
        webBrowser1.Document.ExecCommand("Refresh", false, null);
        webBrowser1.Document.ExecCommand("SaveAs", false, null);
        webBrowser1.Document.ExecCommand("SaveAsComplete", false, null);
        webBrowser1.Document.ExecCommand("SaveAsFile", false, null);
        webBrowser1.Document.ExecCommand("SaveAsImage", false, null);
        webBrowser1.Document.ExecCommand("SaveAsWebArchive", false, null);
        webBrowser1.Document.ExecCommand("SaveAsWord", false, null);
        webBrowser1.Document.ExecCommand("SaveAsXml", false, null);
        webBrowser1.Document.ExecCommand("SelectAll", false, null);
        webBrowser1.Document.ExecCommand("SelectElement", false, null);
        webBrowser1.Document.ExecCommand("SelectElementContents", false, null);
        webBrowser1.Document.ExecCommand("SelectWord", false, null);
        webBrowser1.Document.ExecCommand("ShowContextMenu", false, null);
        webBrowser1.Document.ExecCommand("ShowMediaControls", false, null);
        webBrowser1.Document.ExecCommand("ShowPrintButton", false, null);
        webBrowser1.Document.ExecCommand("ShowTextResize", false, null);
        webBrowser1.Document.ExecCommand("ShowVideoResize", false, null);
        webBrowser1.Document.ExecCommand("Stop", false, null);
        webBrowser1.Document.ExecCommand("Undo", false, null);
        webBrowser1.Document.ExecCommand("Unselect", false, null);
        webBrowser1.Document.ExecCommand("ViewSource", false, null);
    }
}