[c#]获取exchange中的图片

摘要

获取的邮件内容为html标签格式，也就是一个页面。如果里面含有img标签，你会发现img标签的src属性为cid:xxxxxxxxxxxx的一串字符串，并不是url，这时候就造成页面上图片显示不出来。

CidPattern = private static HashSet<int> BuildCidIndex(string html)
{
var index = new HashSet<int>();
var pos = html.IndexOf(CidPattern,0);
while (pos > 0)
{
var start = pos + CidPattern.Length;
index.Add(start);
pos = html.IndexOf(CidPattern,start);
}
return index;
}

方法

AdjustIndex(HashSet<> index, oldPos, oldIndex = List<> ( pos (pos <+private static bool ReplaceCid(HashSet<int> index,ref string html,string cid,string path)
{
var posToRemove = -1;
foreach (var pos in index)
{
if (pos + cid.Length < html.Length && html.Substring(pos,cid.Length) == cid)
{
var sb = new StringBuilder();
sb.Append(html.Substring(0,pos-CidPattern.Length));
sb.Append(path);
sb.Append(html.Substring(pos + cid.Length));
html = sb.ToString();

        posToRemove </span>=<span style="color: #000000;"&gt; pos;
        </span><span style="color: #0000ff;"&gt;break</span><span style="color: #000000;"&gt;;
    }
}

</span><span style="color: #0000ff;"&gt;if</span> (posToRemove < <span style="color: #800080;"&gt;0</span><span style="color: #000000;"&gt;)
    </span><span style="color: #0000ff;"&gt;return</span> <span style="color: #0000ff;"&gt;false</span><span style="color: #000000;"&gt;;

index.Remove(posToRemove);
AdjustIndex(index,posToRemove,path.Length </span>- (CidPattern.Length +<span style="color: #000000;"&gt; cid.Length));

</span><span style="color: #0000ff;"&gt;return</span> <span style="color: #0000ff;"&gt;true</span><span style="color: #000000;"&gt;;

}

获取的item中获取附件

FileAttachment[] attachments = index = (index.Count > && item.Attachments.Count > basePath =

attachments </span>= <span style="color: #0000ff;"&gt;new</span><span style="color: #000000;"&gt; FileAttachment[item.Attachments.Count];
</span><span style="color: #0000ff;"&gt;for</span> (<span style="color: #0000ff;"&gt;var</span> i = <span style="color: #800080;"&gt;0</span>; i < item.Attachments.Count; ++<span style="color: #000000;"&gt;i)
{
  </span><span style="color: #0000ff;"&gt;var</span> type =<span style="color: #000000;"&gt; item.Attachments[i].ContentType.ToLower();
  </span><span style="color: #0000ff;"&gt;if</span> (!type.StartsWith(<span style="color: #800000;"&gt;"</span><span style="color: #800000;"&gt;image/</span><span style="color: #800000;"&gt;"</span>)) <span style="color: #0000ff;"&gt;continue</span><span style="color: #000000;"&gt;;                    
  type </span>= type.Replace(<span style="color: #800000;"&gt;"</span><span style="color: #800000;"&gt;image/</span><span style="color: #800000;"&gt;"</span>,<span style="color: #800000;"&gt;""</span><span style="color: #000000;"&gt;);

  </span><span style="color: #0000ff;"&gt;var</span> attachment =<span style="color: #000000;"&gt; (FileAttachment)item.Attachments[i];
  </span><span style="color: #0000ff;"&gt;var</span> cid =<span style="color: #000000;"&gt; attachment.ContentId;
  </span><span style="color: #0000ff;"&gt;var</span> filename = cid + <span style="color: #800000;"&gt;"</span><span style="color: #800000;"&gt;.</span><span style="color: #800000;"&gt;"</span> +<span style="color: #000000;"&gt; type;
  </span><span style="color: #0000ff;"&gt;var</span> path =<span style="color: #000000;"&gt; Path.Combine(basePath,filename);
  </span><span style="color: #0000ff;"&gt;if</span>(ReplaceCid(index,<span style="color: #0000ff;"&gt;ref</span><span style="color: #000000;"&gt; sHTMLCOntent,cid,path))
  {
     </span><span style="color: #008000;"&gt;//</span><span style="color: #008000;"&gt; only load images when they have been found          </span>

attachment.Load(path);
attachments[i] = attachment;
}
}
}

原文链接：https://www.f2er.com/csharp/191530.html

[c#]获取exchange中的图片

摘要

解决办法

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