c# - C# File.Copy 抛出异常“不支持给定路径的格式”

Question

string source = @"C:\Users\damanja\Desktop\Projects\RecStudentManagement\RecStudentManagement.Web\Reports\Templates\ContactInformationReport.xlsx";
string dest = @"C:\Users\damanja\Desktop\Projects\RecStudentManagement\RecStudentManagement.Web\Reports\Ran\damanja2012-12-17T10:14:02.0394885-06:00.xlsx";

File.Copy(source, dest, true);

产生此异常：

The given path's format is not supported.

堆栈跟踪：

at System.Security.Util.StringExpressionSet.CanonicalizePath(String path, Boolean needFullPath)
   at System.Security.Util.StringExpressionSet.CreateListFromExpressions(String[] str, Boolean needFullPath)
   at System.Security.Permissions.FileIOPermission.AddPathList(FileIOPermissionAccess access, AccessControlActions control, String[] pathListOrig, Boolean checkForDuplicates, Boolean needFullPath, Boolean copyPathList)
   at System.Security.Permissions.FileIOPermission..ctor(FileIOPermissionAccess access, String[] pathList, Boolean checkForDuplicates, Boolean needFullPath)
   at System.IO.File.InternalCopy(String sourceFileName, String destFileName, Boolean overwrite)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at RecStudentManagement.Web.Reports.ExcelReport.CopyTemplate() in C:\\Users\\damanja\\Desktop\\Projects\\RecStudentManagement\\RecStudentManagement.Web\\Reports\\ExcelReport.cs:line 52
   at RecStudentManagement.Web.Reports.ExcelReport..ctor(String fileName) in C:\\Users\\damanja\\Desktop\\Projects\\RecStudentManagement\\RecStudentManagement.Web\\Reports\\ExcelReport.cs:line 35
   at RecStudentManagement.Web.Reports.ContactInformationReport..ctor(IEnumerable`1 students, IEnumerable`1 includedPrograms, String createdByULID, String fileName) in C:\\Users\\damanja\\Desktop\\Projects\\RecStudentManagement\\RecStudentManagement.Web\\Reports\\ContactInformationReport.cs:line 22
   at RecStudentManagement.Web.Controllers.ReportsController.ContactInformationCreate(ContactInformationSetUpViewModel vm) in C:\\Users\\damanja\\Desktop\\Projects\\RecStudentManagement\\RecStudentManagement.Web\\Controllers\\ReportsController.cs:line 99

源目录和目标目录都存在。

Answer 1

您在目标路径中有冒号 (:)，这是 Windows 不允许的（当然，除了作为驱动器号说明符的一部分......）。

要使其正常工作，请为您尝试嵌入的日期时间选择不同的日期格式，该格式不使用冒号。

Answer 2

这是一个 MSDN 站点，它将解释保留字符以及创建Windows 文件路径时允许或不允许的内容，如果您必须“_”重新格式化日期部分以使用yyyymmdd或mmddyyyy ，请用下划线 替换“:”存储在不同的 DateTime 变量中并将其转换为字符串..您可以使用许多其他选项..

命名文件、路径和命名空间 (Windows)