我目前正在编写一个从文档中获取 XML 并将其显示在网页上的上传系统。
我面临的问题是，每当我添加网站的 XML 提取部分时，编译器都会返回标题中提到的错误。
我的代码目前看起来像这样。
导致问题的部分是 publicstatic Xnamespace w 和以下所有相关的 XML 代码。干杯。
<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
//Response.Redirect("http://portal.acoura.com/admin/templatewizard.aspx", false);
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's 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
//{
//}
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 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;
}
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.
}
//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>
最佳答案
是的，这就是问题所在:
public static XDocument GetXDocument(this OpenXmlPart part)
这不是在顶级静态非泛型类中声明的，而扩展方法必须是。
我强烈建议您停止混合代码和 HTML - 将代码放在代码隐藏和其他类中。 GetXDocument 方法需要位于单独的类中，因为根据编译错误，它需要位于静态类中。
编辑:一个糟糕的选择是让它不是扩展方法:
public static XDocument GetXDocument(OpenXmlPart part)
然后你的电话看起来像这样:
document.MainDocumentPart
.GetXDocument()
将需要:
GetXDocument(document.MainDocumentPart)
关于c# - 必须在非通用静态类中定义扩展方法 - 从文档中提取 XML，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20680478/