wpf窗口快速读取导出excel

[{"title":"（ 115 个子文件 4.2MB ） wpf窗口快速读取导出excel","children":[{"title":"TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"NPOILib.dll <span style='color:#111;'> 7.50KB </span>","children":null,"spread":false},{"title":"NPOILib.csproj.FileListAbsolute.txt <span style='color:#111;'> 989B </span>","children":null,"spread":false},{"title":"DesignTimeResolveAssemblyReferencesInput.cache <span style='color:#111;'> 6.48KB </span>","children":null,"spread":false},{"title":"NPOILib.pdb <span style='color:#111;'> 17.50KB </span>","children":null,"spread":false},{"title":"......","children":null,"spread":false},{"title":"<span style='color:steelblue;'>文件过多，未全部展示</span>","children":null,"spread":false}],"spread":true}]