我使用OpenXml读取Excel文件。所有工作正常但如果电子表格包含一个具有地址邮件的单元格,并且在其后面有空格和另一个单词,例如:
abc@abc.com abc
它会在电子表格的开头立即抛出异常:
var _doc = SpreadsheetDocument.Open(_filePath, false);
异常:
DocumentFormat.OpenXml.Packaging.OpenXmlPackageException
其他信息:
无效的超链接:格式错误的URI被嵌入为 文档中的超链接。
答案 0 :(得分:7)
OpenXml论坛上有一个与此问题相关的未解决问题:Malformed Hyperlink causes exception
在帖子中,他们谈到了遇到这个问题时遇到了这个问题:#mail;" mailto:" Word文档中的超链接。
他们建议在这里解决问题:Workaround for malformed hyperlink exception
解决方法本质上是一个小型控制台应用程序,它定位无效的URL并用硬编码值替换它;这是他们的样本中的代码片段,用于替换;您可以扩充此代码以尝试更正传递的brokenUri:
private static Uri FixUri(string brokenUri)
{
return new Uri("http://broken-link/");
}
我遇到的问题实际上是Excel文档(和你一样),而且它与格式错误的http网址有关;我惊喜地发现他们的代码在我的Excel文件中运行得很好。
以下是整个解决方法的源代码,以防其中一个链接在将来消失:
void Main(string[] args)
{
var fileName = @"C:\temp\corrupt.xlsx";
var newFileName = @"c:\temp\Fixed.xlsx";
var newFileInfo = new FileInfo(newFileName);
if (newFileInfo.Exists)
newFileInfo.Delete();
File.Copy(fileName, newFileName);
WordprocessingDocument wDoc;
try
{
using (wDoc = WordprocessingDocument.Open(newFileName, true))
{
ProcessDocument(wDoc);
}
}
catch (OpenXmlPackageException e)
{
e.Dump();
if (e.ToString().Contains("The specified package is not valid."))
{
using (FileStream fs = new FileStream(newFileName, FileMode.OpenOrCreate, FileAccess.ReadWrite))
{
UriFixer.FixInvalidUri(fs, brokenUri => FixUri(brokenUri));
}
}
}
}
private static Uri FixUri(string brokenUri)
{
brokenUri.Dump();
return new Uri("http://broken-link/");
}
private static void ProcessDocument(WordprocessingDocument wDoc)
{
var elementCount = wDoc.MainDocumentPart.Document.Descendants().Count();
Console.WriteLine(elementCount);
}
}
public static class UriFixer
{
public static void FixInvalidUri(Stream fs, Func<string, Uri> invalidUriHandler)
{
XNamespace relNs = "http://schemas.openxmlformats.org/package/2006/relationships";
using (ZipArchive za = new ZipArchive(fs, ZipArchiveMode.Update))
{
foreach (var entry in za.Entries.ToList())
{
if (!entry.Name.EndsWith(".rels"))
continue;
bool replaceEntry = false;
XDocument entryXDoc = null;
using (var entryStream = entry.Open())
{
try
{
entryXDoc = XDocument.Load(entryStream);
if (entryXDoc.Root != null && entryXDoc.Root.Name.Namespace == relNs)
{
var urisToCheck = entryXDoc
.Descendants(relNs + "Relationship")
.Where(r => r.Attribute("TargetMode") != null && (string)r.Attribute("TargetMode") == "External");
foreach (var rel in urisToCheck)
{
var target = (string)rel.Attribute("Target");
if (target != null)
{
try
{
Uri uri = new Uri(target);
}
catch (UriFormatException)
{
Uri newUri = invalidUriHandler(target);
rel.Attribute("Target").Value = newUri.ToString();
replaceEntry = true;
}
}
}
}
}
catch (XmlException)
{
continue;
}
}
if (replaceEntry)
{
var fullName = entry.FullName;
entry.Delete();
var newEntry = za.CreateEntry(fullName);
using (StreamWriter writer = new StreamWriter(newEntry.Open()))
using (XmlWriter xmlWriter = XmlWriter.Create(writer))
{
entryXDoc.WriteTo(xmlWriter);
}
}
}
}
}
答案 1 :(得分:1)
不幸的是,您必须以zip格式打开文件并替换损坏的超链接的解决方案对我没有帮助。
我只是想知道当您的目标框架为4.0时,即使仅安装的.Net Framework版本为4.7.2,它仍能正常工作的可能性。
我发现System.UriParser
中有一个私有静态字段,用于选择URI的RFC规范的版本。因此,可以将其设置为V2,因为它是为.net 4.0和更低版本的.Net Framework设置的。唯一的问题是private static readonly
。
也许有人想为整个应用程序全局设置它。但是我写了UriQuirksVersionPatcher
,它将更新此版本并将其还原到Dispose方法中。显然它不是线程安全的,但就我的目的而言是可以接受的。
using System;
using System.Diagnostics;
using System.Reflection;
namespace BarCap.RiskServices.RateSubmissions.Utility
{
#if (NET20 || NET35 || NET40)
public class UriQuirksVersionPatcher : IDisposable
{
public void Dispose()
{
}
}
#else
public class UriQuirksVersionPatcher : IDisposable
{
private const string _quirksVersionFieldName = "s_QuirksVersion"; //See Source\ndp\fx\src\net\System\_UriSyntax.cs in NexFX sources
private const string _uriQuirksVersionEnumName = "UriQuirksVersion";
/// <code>
/// private enum UriQuirksVersion
/// {
/// V1 = 1, // RFC 1738 - Not supported
/// V2 = 2, // RFC 2396
/// V3 = 3, // RFC 3986, 3987
/// }
/// </code>
private const string _oldQuirksVersion = "V2";
private static readonly Lazy<FieldInfo> _targetFieldInfo;
private static readonly Lazy<int?> _patchValue;
private readonly int _oldValue;
private readonly bool _isEnabled;
static UriQuirksVersionPatcher()
{
var targetType = typeof(UriParser);
_targetFieldInfo = new Lazy<FieldInfo>(() => targetType.GetField(_quirksVersionFieldName, BindingFlags.Static | BindingFlags.NonPublic));
_patchValue = new Lazy<int?>(() => GetUriQuirksVersion(targetType));
}
public UriQuirksVersionPatcher()
{
int? patchValue = _patchValue.Value;
_isEnabled = patchValue.HasValue;
if (!_isEnabled) //Disabled if it failed to get enum value
{
return;
}
int originalValue = QuirksVersion;
_isEnabled = originalValue != patchValue;
if (!_isEnabled) //Disabled if value is proper
{
return;
}
_oldValue = originalValue;
QuirksVersion = patchValue.Value;
}
private int QuirksVersion
{
get
{
return (int)_targetFieldInfo.Value.GetValue(null);
}
set
{
_targetFieldInfo.Value.SetValue(null, value);
}
}
private static int? GetUriQuirksVersion(Type targetType)
{
int? result = null;
try
{
result = (int)targetType.GetNestedType(_uriQuirksVersionEnumName, BindingFlags.Static | BindingFlags.NonPublic)
.GetField(_oldQuirksVersion, BindingFlags.Static | BindingFlags.Public)
.GetValue(null);
}
catch
{
#if DEBUG
Debug.WriteLine("ERROR: Failed to find UriQuirksVersion.V2 enum member.");
throw;
#endif
}
return result;
}
public void Dispose()
{
if (_isEnabled)
{
QuirksVersion = _oldValue;
}
}
}
#endif
}
用法:
using(new UriQuirksVersionPatcher())
{
using(var document = SpreadsheetDocument.Open(fullPath, false))
{
//.....
}
}
P.S。后来我发现有人已经实现了该探路者:https://github.com/google/google-api-dotnet-client/blob/master/Src/Support/Google.Apis.Core/Util/UriPatcher.cs
答案 2 :(得分:0)
我还没有使用OpenXml,但如果没有特别的理由使用它,那么我强烈推荐来自LinqToExcel的LinqToExcel。代码示例如下:
plot_labelwrap
答案 3 :(得分:0)