Importing a asp.net webPart in WebForm website from .Webpart file programmatically (Not a sharePoint Project)

We have created several user Controls (Ascx) that we render to a webpart zone. Similarly, we have a control containing WebPartManager which is implemented in all the .aspx pages.

I am working on a feature where it is required to Import generated .webpart file on any page using a file upload control.
I am Using devExpress fileUpload control and upon FileUploadComplete Event executing the below-mentioned code.
The code Runs without any error but also doesn’t display any web-part in the specified zone. Which is the problem.

 protected void WebPartUploadControl_FileUploadComplete(object sender, FileUploadCompleteEventArgs e)
        {
            string ErrorMessge = string.Empty;
            if (e.UploadedFile.IsValid)
            {
                var xmlReader = XmlReader.Create(e.UploadedFile.FileContent);
                xmlReader.Read();

                System.Web.UI.WebControls.WebParts.WebPart webPart = wpManager.ImportWebPart(xmlReader, out ErrorMessge);

                       wpManager.AddWebPart(webPart, wpManager.Zones["Zone5"], 1);
            }


        }

I might be missing some fundamental code. If anybody knows the answer kindly help. Thanks .

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

I finally figured out the issue. Just in case if someone in future come across a similar problem, this will help.

So, The problem here is the Devexpress File-Upload control is an ajax control, making partial postback thus not updating the CatalogZone of the page which is out of its scope.

The way to deal with it is :

1. Create a new .WebPart file and clone the content of the uploaded file.
2. Re-direct to the same page which fires Page_Load event
3. Execute the above code in the page_Load Event in order to import.

Below is the code to explain just that :

WebPartUploadControl_FileUploadComplete

        protected void WebPartUploadControl_FileUploadComplete(object sender, FileUploadCompleteEventArgs e)
        {

String WebPartFilePath = Server.MapPath("DirectoryWhereYouWantTosaveCloneFile");
            String WebPartFileName = "NameOfYourCloneFile.WebPart";
            
            string FileContent = string.Empty;

            Creating Directory to store data of uploaded file(.webPart).

            Session["ImportWebPartFilePath"] = $"{WebPartFilePath}/{WebPartFileName}";
            if (!Directory.Exists(WebPartFilePath))
            {
                Directory.CreateDirectory(WebPartFilePath);
            }

            Reading Uploaded file Data

            using (StreamReader sr = new StreamReader(e.UploadedFile.FileContent))
            {
                FileContent = sr.ReadToEnd();
            }

            //Copying File Data to the newly Created file 

            if (!File.Exists(Session["ImportWebPartFilePath"].ToString()))
            {
                File.AppendAllText(WebPartFilePath + "/" + WebPartFileName, FileContent);
            }

            e.CallbackData = "Page Settings Imported Successfully.";

            // Response.Redirect(Request.RawUrl) does not work in while ajax callback in 
               devexpress
            // Creating a callback to current page to trigger Page_Load event.

            DevExpress.Web.ASPxWebControl.RedirectOnCallback(this.Request.Path);
}

Page_Load

if (Session["ImportWebPartFilePath"] != null)
            {
                //Import Webpart Settings
                ImportWebPartsToCurrentPage(Session["ImportWebPartFilePath"].ToString());
                File.Delete(Session["ImportWebPartFilePath"].ToString());
                Session["ImportWebPartFilePath"] = null;

            }

ImportWebPartsToCurrentPage

 private void ImportWebPartsToCurrentPage(String FilePath)
        {
            string ErrorMessge = string.Empty;
            //Extracting All WebParts in the file
            XDocument WebPartXml = XDocument.Load(FilePath);

            //Spliting the each webpart.
            var WebPartDescriptions = WebPartXml.Root.Elements();
            try
            {
                foreach (var WebPartDescription in WebPartDescriptions)
                {
                    var xmlReader = XmlReader.Create(new StringReader(WebPartDescription.ToString()));
                    xmlReader.Read();
                    // Adding Webpart to page Catalog.
                    System.Web.UI.WebControls.WebParts.WebPart webPart = wpManager.ImportWebPart(xmlReader, out ErrorMessge);
                    //Adding webpart to the page.
                    if (!wpManager.WebParts.Contains(webPart))
                    {
                        wpManager.AddWebPart(webPart, wpManager.Zones["ZoneName"], 0);
                    }
                }
            }
            catch (Exception ex)
            {
                Response.Write(ex);

            }
        }

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0