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我正在使用 EPPlus（向开发人员提供一个很棒的库的道具）来制作一个将在浏览器中下载的 Excel 文档。在生成 Excel 文档的代码中，我有几行旨在将图像文件包含在 Excel 文档中。

Image logoImg = Image.FromFile(Server.MapPath("~/Images/bill_logo.png"));
var logo = ws.Drawings.AddPicture("Logo", logoImg);

当我在我的机器上本地运行项目时，图像按预期显示。但是，当我在 Azure 中部署到我们的测试环境时，我收到以下错误：

System.IO.FileNotFoundException: C:\DWASFiles\Sites\sitename\VirtualDirectory0\site\wwwroot\Images\bill_logo.png
at System.Drawing.Image.FromFile(String filename, Boolean useEmbeddedColorManagement)
at System.Drawing.Image.FromFile(String filename)
at emergePortal.Web.Controllers.BillingController.buildWorksheet(ExcelWorksheet ws, String sheetName, IEnumerable`1 lineItems) in c:\a\src\emergePortal\emergePortal.Web\Controllers\BillingController.cs:line 202
at emergePortal.Web.Controllers.BillingController.getBill(Int32 billMonth, Int32 billYear) in c:\a\src\emergePortal\emergePortal.Web\Controllers\BillingController.cs:line 106
at lambda_method(Closure , ControllerBase , Object[] )
at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41()
at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _)
at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<>c__DisplayClass2a.<BeginInvokeAction>b__20()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult)

引用此图像文件以使其跨环境工作的最佳方法是什么？

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2 回答 2

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异常中的给定路径是该文件的正确路径吗？如果是权利？如果不是，则异常是正确的。:)

于 2013-07-30T13:38:54.320 回答
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部署 azure 时我遇到了同样的问题。Server.MapPath 在天蓝色中不起作用

我解决了这个问题。但我忘记了如何解决这个问题。抱歉

请尝试这种代码方式。我想我用这段代码来解决你的问题

// Retrieve an object that points to the local storage resource
LocalResource localResource = RoleEnvironment.GetLocalResource("localStoreTwo");

//Define the file name and path
string[] paths = { localResource.RootPath, "MyStorageTest.txt"};
String filePath = Path.Combine(paths);

更多详情请看这里

在 Window Azure 中获取物理应用程序路径

和Msdn

于 2013-07-30T16:17:23.783 回答