Question

我有一个Web表单页面，应该能够将Crystal Report的内容写入pdf或excel文档，具体取决于用户的选择。

我有两个问题：

对于.pdf和.xls扩展名，都有一个括号在它内部附加到扩展IE：fileName.xls'1'
如果用户选择excel文档，则在IE中显示文件下载提示出现并询问我们是否要保存或打开文件：

enter image description here

PDF文件保存得很好，但是如果我们选择打开excel文件，它会打开一个资源管理器窗口，我们会得到垃圾......

这是我们的代码：

try
{
    permission = new FileIOPermission(FileIOPermissionAccess.Read, output);
    fs = File.Open(output, FileMode.Open, FileAccess.Read);
    byte[] byteArray = new byte[fs.Length];
    fs.Read(byteArray, 0, (int)fs.Length);
    fs.Close();
    fs.Dispose();
    Response.Clear();
    Response.ClearHeaders();
    Response.ClearContent();
    fileName = fileName + '.' + extn;
    //Response.AddHeader("Content-Disposition", "attachments;filename=\"" + fileName + ".\"" + extn);
    Response.AddHeader("Content-Disposition", "attachments;filename=\"" + fileName + "\"");
    Response.AddHeader("Content-Length", byteArray.Length.ToString());

    switch ("." + extn)
    {
        case ".pdf":
            Response.AppendHeader("Content-Type", "application/pdf");
            break;
        case ".xls":
            //Response.ContentType = "application/vnd.ms-excel";
            //Response.ContentType = "application/octet-stream";
            Response.AppendHeader(".xls", "application/excel");
            //Response.AppendHeader("Content-Type", "application/vnd.ms-excel");
            //Response.AppendHeader("Content-Type", "application/force-download");

            break;
        case ".txt":
            Response.AppendHeader("Content-Type", "application/notepad");
            break;

    }
    FileInfo info = new FileInfo(output);
    info.Delete();
    Response.BinaryWrite(byteArray);
    Response.Flush();
    Response.End();
}
catch (Exception ex)
{

    if (fs != null)
        fs.Close();
}

我一直在研究人们遇到“1”附加到扩展名的现象，但是在其上找不到很多，并调试了代码并确认扩展名是干净的。< / p>

我的下一个猜测是在Response.BinaryWrite（byteArray）中发生的事情;行或mime类型或内容标题...

提前感谢您的任何帮助

道格

Answer 1

我在项目中做了类似的事情。我已粘贴下面的代码。我想，你突然更换了这条线。 Response.AppendHeader（“。xls”，“application / excel”）; 同 Response.ContentType =“application / excel”;

string name = Path.GetFileName(path);
        string ext = Path.GetExtension(path);
        string type = "";
        // set known types based on file extension 
        if (ext != null)
        {
            switch (ext.ToLower())
            {
                case ".htm":
                case ".html":
                    type = "text/HTML";
                    break;


                case ".txt":
                    type = "text/plain";
                    break;


                case ".doc":
                case ".docx":
                case ".rtf":
                    type = "Application/msword";
                    break;

                case ".pdf":
                    type = "application/pdf";
                    break;

                case ".csv":
                case ".xlsx":
                    type = "application/vnd.ms-excel";
                    break;
            }
        }
        Response.AppendHeader("content-disposition",
            "attachment; filename=" + name);
        if (string.IsNullOrEmpty(type))
        {

        }
        else
        {
            Response.ContentType = type;
        }
        Response.WriteFile(path);
        Response.End();

Answer 2

将switch扩展为以下内容：

switch ("." + extn)
{
    // case ".pdf":
    // ...

    default:
        throw new NotImplementedException();
}

如果抛出异常，这可能会给你一个关于出错的提示。

ASP.NET Excel和PDF下载将“[1]”附加到我的.PDF / .XLS扩展

2 个答案: