将数据导出为内存流中的 XML 并提供下载提示

以下代码片段演示了如何动态生成 XML 内容，然后将其存储在内存中（MemoryStream）。如果无法在服务器上保存输出，或者避免处理权限问题，这种做法非常有用。相反，XML 在内存中生成，然后用户将自动提示将 XML 文件下载到本地资源，类似于尝试下载文件时发生的情况。

protected bool GenerateExportFile()
{
    try
    {
            //Create Memory Stream to store XML Data
            MemoryStream ms = new MemoryStream();
            //Use a writer to create the XML
            using (XmlWriter writer = XmlWriter.Create(ms))
            {
                writer.WriteStartDocument(); //Header
                writer.WriteComment("Comment goes here");
                {
                    writer.WriteStartElement("Root"); //<Root>
                    {
                            writer.WriteStartElement("Element1"); //<Element1>
                            writer.WriteAttributeString("Attribute1", "AtributeValue");
                            writer.WriteStartElement("Element2");
                            writer.WriteString("Element2Value");
                            writer.WriteEndElement(); //<Element2>
                    }

                    writer.WriteEndElement(); //<Root>
                    //Closed the Root Tag
                }
                writer.WriteEndDocument();
                writer.Close();

                //Convert Memory Stream to Byte Array
                byte[] data = ms.ToArray();

                //The Proposed FileName that will show when the 
                //user is prompted to save the file
                string xmlFileName = "OrdExp_" + DateTime.Today.Year.ToString() + 
                    DateTime.Today.Month.ToString("00") + 
                    DateTime.Today.Day.ToString("00");

                //Creating the Context
                HttpContext.Current.Response.Clear();

                //Heads up browser, here comes some XML
                HttpContext.Current.Response.ContentType = "text/xml";
                HttpContext.Current.Response.AddHeader("Content-Disposition:", 
                    "attachment;filename=" + HttpUtility.UrlEncode(xmlFileName));

                //Set the size of the file so the progress bar reports that correctly
                HttpContext.Current.Response.AddHeader("Content-Length", 
                    data.Length.ToString());

                //Download the file and prompt the user to save
                HttpContext.Current.Response.BinaryWrite(data);
                HttpContext.Current.Response.End();
                ms.Flush();
                ms.Close();
                return true;
            }
    }
    catch (Exception exc)
    {
        lblMsg.Text = "Error Generating File: " + exc.Message;
        return false;
    }            
    return true;   
}//Method

这段代码用于生成 XML 数据输出，然后添加了自动将数据导出到本地机器的功能。

希望这有帮助！
Will