asp.net-mvc - 在 .Net C# MVC 中打开下载的 excel 文件后文件名更改

Question

我正在尝试在我的 C#.Net MVC 应用程序中将数据导出为 Excel。我return file()在Actionresult. 文件返回并成功下载。

但是打开文件时出现错误，打开文件时文件名被更改。下载的文件名是ExportFilterCRMdoctorRequest.xls，但是打开后变成Book1. 导出文件的代码：

public ActionResult ExportFilterCRMdoctorRequest() 
        {
            var stream = new MemoryStream();
            var serializer = new XmlSerializer(typeof(List<CDRFilterCRMDoctorRequest>));

            //We load the data
            List<CDRFilterCRMDoctorRequest> data = (List<CDRFilterCRMDoctorRequest>)Session["filterCRMRequestList"]; //Retriving data from Session

            //We turn it into an XML and save it in the memory
            serializer.Serialize(stream, data);
            stream.Position = 0;

            //We return the XML from the memory as a .xls file
            return File(stream, "application/vnd.ms-excel", "ExportFilterCRMdoctorRequest.xls");
        }

Answer 1

这称为扩展硬化。执行步骤以避免此错误。

1. 打开您的注册表（开始 -> 运行 -> regedit.exe）导航到
   
2. HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\OFFICE\12.0\EXCEL\SECURITY
3. 右键单击右侧窗口并选择新建 -> DWORD 类型
   
4. “ExtensionHardening”作为名称（不带引号）
5. 验证数据的值是否为“0”</li>

笔记

在 XML 中序列化时必须牢记一件事。XML 不是 Excel 的标准格式，它必须将文件作为 XML 数据打开。这意味着当打开文件时，它会发出一些警告，这些警告比其他任何东西都更令人讨厌。

回到你原来的查询：复制你的问题，下面是修复

样本类

public class StudentModel
{
    public string Name { get; set; }
    public string Address { get; set; }
    public string Class { get; set; }
    public string Section { get; set; }
}

样本数据

private List<StudentModel> StudentData()
{
    List<StudentModel> objstudentmodel = new List<StudentModel>();
    objstudentmodel.Add(new StudentModel { Name = "Name1", Class = "1", 
                                         Address = "Address1", Section = "A" });
    objstudentmodel.Add(new StudentModel { Name = "Name2", Class = "2", 
                                         Address = "Address2", Section = "A" });
    return objstudentmodel;
}

动作方法

public ActionResult Index()
{
    List<StudentModel> objstudent = new List<StudentModel>();
    objstudent = StudentData();
    StringBuilder sb = new StringBuilder();
    sb.Append("<table border='" + "1px" + "'b>");
    //code section for creating header column
    sb.Append("<tr>");
    sb.Append("<td><b><font size=2>NAME</font></b></td>");
    sb.Append("<td><b><font size=2>CLASS</font></b></td>");
    sb.Append("<td><b><font size=2>ADDRESS</font></b></td>");
    sb.Append("<td><b><font size=2>SECTION</font></b></td>");
    sb.Append("</tr>");

    //code for creating excel data
    foreach (StudentModel item in objstudent)
    {
        sb.Append("<tr>");
        sb.Append("<td><font>" + item.Name.ToString() + "</font></td>");
        sb.Append("<td><font>" + item.Class.ToString() + "</font></td>");
        sb.Append("<td><font>" + item.Address.ToString() + "</font></td>");
        sb.Append("<td><font>" + item.Section.ToString() + "</font></td>");
        sb.Append("</tr>");
    }
    sb.Append("</table>");
    HttpContext.Response.AddHeader("content-disposition", 
                                   "attachment; filename=student_" + 
                                   DateTime.Now.Year.ToString() + ".xls");
    this.Response.ContentType = "application/vnd.ms-excel";

    byte[] buffer = System.Text.Encoding.UTF8.GetBytes(sb.ToString());
    return File(buffer, "application/vnd.ms-excel");
}