You must add a link to the assembly 'WindowsBase, Version = 3.0.0.0

Question

I am currently writing a download system that takes XML from a document and displays it on a web page.

The problem I am facing is that whenever I add a part of the XML extraction to the website, the compiler will return an error as indicated in the title. I have already added WindowsBase, both from the manual and from the drop-down menu.

Currently my code looks like.

<script runat="server"> //This template is being built to allow the viewstates to be displayed and allow them to be hidden //or shown at the same time. The buttons are being added so we can test whether they will //be hidden on page use public string _TempFileLocation = ""; //Used to locate Word Document File Path protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { string viewStateDisplay1 = "ViewState1 is now being displayed"; string viewStateDisplay2 = "ViewState2 is now being displayed"; // var ViewShow = viewStateDisplay1; // var ViewShow2 = viewStateDisplay2; if (ViewState["PageState"] == null) { ViewState["PageState"] = viewStateDisplay1; } else { ViewState["PageState"] = viewStateDisplay2; //viewStateDisplay = false; } } } //button that shows the label string protected void btnClick_Click(object sender, EventArgs e) { lblString.Text = ViewState["PageState"].ToString(); lblString.Visible = true; } //button that hides the div, changing "lblstring" or adding more should be able to hide //or show whatever methods / objects we want private void Close(object sender, EventArgs e) { lblString.Visible = !lblString.Visible; lblString.Visible = false; } //This will be the default set for the page. It will start on true for viewstatedisplay //this will be done again, but with viewstatedisplay2 for the next method regarding //the two columns and displaying document and DB data. "viewStateDisplay2.Visible = true" //private void gotoviewStateDisplay1(object sender, EventArgs e) // { // ViewState("PageState") = 1; // viewStateDisplay1.Visible = true; // viewStateDisplay2.Visible = false; //} //private void gotoviewStateDisplay2(object sender, EventArgs e) // { // ViewState("PageState") = 2; // viewStateDisplay1.Visible = false; // viewStateDisplay2.Visible = true; //} //THE USER UPLOAD CONTROL. users use this to upload the document to the server //This has validation so they cannot upload wrong file types / too large files // public partial class UploadFileControl : System.Web.UI.UserControl // { //ViewState1 public void XMLextractor(string _filePath) { //XML extraction code // displayFilepath.Text = _filePath; // _TempFileLocation = _filePath; } //names the script manager which will be used when the user attempts to upload a form / gives an error if they incorrectly attempt to upload protected void UploadButton_Click(object sender, EventArgs e) { //if file is located if (FileUploadControl.HasFile) { try { //allow content type of document / docx if (FileUploadControl.PostedFile.ContentType == "application/vnd.openxmlformats-officedocument.wordprocessingml.document") { //if the file is is less than 51mb if (FileUploadControl.PostedFile.ContentLength < 10485760) // 10mb) { //name the filename, find the path of the name string filename = Path.GetFileName(FileUploadControl.FileName); //path of server upload (we just need to save it as a variable to be found on the next page, as it will be made / deleted FileUploadControl.SaveAs(Server.MapPath("~/") + filename); //update the label with file uploaded StatusLabel.Text = "Upload status: File uploaded!"; XMLextractor(Server.MapPath("~/") + filename); //move onto template wizard page WordprocessingDocument _TempDoc = WordprocessingDocument.Open(Server.MapPath("~/") + filename, true); //labelContentControls.Text = fileUpload_Displayx(GetContentControls(_TempDoc)); //will be used to grab the document string //return; } else //display the size the file needs to be less than StatusLabel.Text = "Upload status: The file has to be less than 10mb!"; } else //tell the user only docx files are accepted StatusLabel.Text = "Upload status: Only DOCX files are accepted!"; } catch (Exception ex) { //display the exception message, in which case it would be either size / type / if it present StatusLabel.Text = "Upload status: The file could not be uploaded. The following error occured: " + ex.Message; } } } // } //insert or link to XMLfromDocument file here. This will declare the variables //and take the required XML sections from the content controls of a document //needs to run as the file is uploaded, then return the control content titles // internal static class W //{ //} //display the TemplateWizard boxes and button here, hide viewstate and display viewstate2 //display content controls from doc on box1, field names from DB in box2 //just create a string here that represents the final state of data being taken from XMLfromDocument //public string fileUpload_Displayx (XElement _contentcontrol) //{ // string str= ""; // str= _contentcontrol.Name.ToString(); // return str; //} //public static displayDatabase(object sender, EventArgs e) // { //} //run the validate button on templatewizard, will mark up any problems or give green light //if red, allow users to replace fields in the left column, from ones in the atabase on the right //display upload button when validation is succesful. When Upload button runs, Take to new // / existing page of reports, allow users to download this </script> <!-- The following section will include all the html and forms etc !--> <!-- on implementation, create different divs for each section, and style appropriately. !--> <div> <!--Testing View state form!--> ViewState Data: <b><asp:Label ID="lblString" runat="server"/></b> <asp:Button ID="btnClick" runat="server" Text="Get ViewState Data" OnClick="btnClick_Click"/> <asp:Button ID="Closeform" runat="server" Text ="Hide PageState" OnClick="Close" /> <br /><br /><br /><br /><br /> <!-- User upload control !--> <asp:FileUpload id="FileUploadControl" runat="server" /> <asp:Button runat="server" id="UploadButton" text="Upload" onclick="UploadButton_Click" /> <asp:TextBox Text="" runat="server" ID="displayFilepath" /> <br /><br /> <asp:Label runat="server" id="StatusLabel" text="Upload status: " /> <br /> <br /> <br /> <br /> <!-- Viewdata2, the document and data from DB will be displayed !--> <!-- Document data !--> <div id="box1" class="box"> <div class="box-top"> Data Sources inside document </div> <div class="box-middle"> <asp:Label runat="server" id="labelContentControls" text="label of content in document" /> <p> Test </p> <p> Test </p> </div> <div class="box-bottom"> </div> </div> <!--Data from DB !--> <div id="box2" class="box"> <div class="box-top"> Data sources existing on the server </div> <div class="box-middle"> <asp:Label runat="server" id="labelDatabasefields" text="label of content in database" /> <p> Test </p> <p> Test </p> </div> <div class="box-bottom"> </div> </div> <input type="button" value="Create Template" id="view" class="form_button"/> </div> 

And the code that seems to cause problems is one of two things.

  internal static class W { public static XNamespace w = "http://schemas.openxmlformats.org/wordprocessingml/2006/main"; public static XName body = w + "body"; public static XName sdt = w + "sdt"; public static XName sdtPr = w + "sdtPr"; public static XName tag = w + "tag"; public static XName val = w + "val"; public static XName sdtContent = w + "sdtContent"; public static XName tbl = w + "tbl"; public static XName tr = w + "tr"; public static XName tc = w + "tc"; public static XName p = w + "p"; public static XName r = w + "r"; public static XName t = w + "t"; public static XName rPr = w + "rPr"; public static XName highlight = w + "highlight"; public static XName pPr = w + "pPr"; public static XName color = w + "color"; public static XName sz = w + "sz"; public static XName szCs = w + "szCs"; } public static class XMLfromDocument { //the program will first need to query the document for the controls that do exist, then return them //static void Main(); public static XDocument GetXDocument(this OpenXmlPart part) { XDocument xdoc = part.Annotation<XDocument>(); if (xdoc != null) return xdoc; using (Stream str = part.GetStream()) using (StreamReader streamReader = new StreamReader(str)) using (XmlReader xr = XmlReader.Create(streamReader)) xdoc = XDocument.Load(xr); part.AddAnnotation(xdoc); return xdoc; } //following method gets the structure of the content controls / XML in the document public static XElement GetContentControls( WordprocessingDocument document) { XElement contentControls = new XElement("ContentControls", document .MainDocumentPart .GetXDocument() .Root .Element(W.body) .Elements(W.sdt) .Select(tableContentControl => new XElement("Table", new XAttribute("Name", (string)tableContentControl .Element(W.sdtPr).Element(W.tag).Attribute( W.val)), tableContentControl .Descendants(W.sdt) .Select(fieldContentControl => new XElement("Field", new XAttribute("Name", (string)fieldContentControl .Element(W.sdtPr) .Element(W.tag) .Attribute(W.val) ) ) ) ) ) ); //display the content controls in a web form in this project using this, the control will have to be added to templatewizard return contentControls; //need to mark the source which will be a file in the same directory as this for test purposes. } //last function that should be done once the details are displayed is that the document must be deleted } } 

OR

 WordprocessingDocument _TempDoc = WordprocessingDocument.Open(Server.MapPath("~/") + filename, true); 

Answer 1

Check the properties of the referenced assembly (select the link and press F4) - try using "Copy local: true"