Asp.Net在线预览Word文档的解决方案与思路详解

项目特点

Asp.Net不带Core，.NET Framework 4.0，部署在Windows平台上。

解决方案

大致思路：先将`Word`文档转换`Html`，再预览`Html`。

1、`Word`文档转`Html`

先引用Office的DLL，在COM里面，注意：电脑需要安装Office哦。

又注意：请在DLL属性里面将嵌入互操作类型改为False

转换过程一个方法搞定：

using Microsoft.Office.Interop.Word;
public static string WordToHtml(string path)
{
	string root = AppDomain.CurrentDomain.BaseDirectory;
	var htmlName = $"{Guid.NewGuid().ToString("N")}.html";
	var htmlPath = root + $"Resource/Temporary/";
	if (!Directory.Exists(htmlPath))
	{
		Directory.CreateDirectory(htmlPath);
	}

	ApplicationClass word = new ApplicationClass();
	Type wordType = word.GetType();
	Documents docs = word.Documents;
	Type docsType = docs.GetType();
	Document doc = (Document)docsType.InvokeMember("Open", BindingFlags.InvokeMethod, null, docs, new Object[] { (object)path, true, true });
	Type docType = doc.GetType();

	docType.InvokeMember("SaveAs", BindingFlags.InvokeMethod, null, doc, new object[] { (htmlPath + htmlName), WdSaveFormat.wdFormatFilteredHTML });
	docType.InvokeMember("Close", BindingFlags.InvokeMethod, null, doc, null);
	wordType.InvokeMember("Quit", BindingFlags.InvokeMethod, null, word, null);

	return htmlName;
}