這是C# asp.net webform，目前要將odt檔轉成PDF檔下載，一直轉不成功，才來發問請教各位要怎麼改法?
謝謝

以下是目前的程式碼

Default.aspx.cs

protected void gvIndex_RowCommand(object sender, GridViewCommandEventArgs e)
{
OdtWriter wr = new OdtWriter();
string TemplatePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "App_Code/CSV/申請表.odt");             

Dictionary<string, string> values = new Dictionary<string, string>()
{
//資料內容省略
};

System.IO.MemoryStream memoryStream = new System.IO.MemoryStream();
wr.WriteOdtFile(values, TemplatePath, memoryStream);
byte[] filebytes = memoryStream.ToArray();
string filename = HttpUtility.UrlEncode("申請表.odt", Encoding.UTF8);
Response.AddHeader("Content-Disposition", string.Format("attachment; filename=" + filename));
Response.Charset = "big5";
Response.ContentType = "odt,application/vnd.oasis.opendocument.text";
Response.BinaryWrite(filebytes);
Response.Flush();
Response.End();
}

odtwriter.cs

public class OdtWriter
{
    // Read zip stream (.ods file is zip file).
private ZipFile GetZipFile(Stream stream)
        {
            return ZipFile.Read(stream);
        }

        // Read zip file (.ods file is zip file).
private ZipFile GetZipFile(string inputFilePath)
        {
            return ZipFile.Read(inputFilePath);
        }

private XmlDocument GetContentXmlFile(ZipFile zipFile)
        {
            // Get file(in zip archive) that contains data ("content.xml").
            ZipEntry contentZipEntry = zipFile["content.xml"];

            Stream contentStream = new MemoryStream();
            contentZipEntry.Extract(contentStream);
            contentStream.Seek(0, SeekOrigin.Begin);

            XmlDocument contentXml = new XmlDocument();
            contentXml.Load(contentStream);

            return contentXml;
        }

public void WriteOdtFile(Dictionary<string, string> values, string templatePath, Stream outputStream)
        {
            foreach (var key in values.Keys.ToList())
            {
                if (values[key] != null)
                values[key] = Regex.Replace(values[key], "[\x00-\x08\x0B\x0C\x0E-\x1F]", "");
            }

            ZipFile templateFile = this.GetZipFile(templatePath);

            XmlDocument contentXml = this.GetContentXmlFile(templateFile);

            foreach (XmlNode child in contentXml.ChildNodes)
                ReplaceValues(child, values);

            this.SaveContentXml(templateFile, contentXml);
            templateFile.Save(outputStream);
        }

public static void ReplaceValues(XmlNode node, Dictionary<string, string> values)
        {
            if (!string.IsNullOrEmpty(node.Value))
                node.Value = ReplaceCell(node.Value, values);
            foreach (XmlNode child in node.ChildNodes)
                ReplaceValues(child, values);
        }

private static Regex reg_Cell = new Regex("\\{\\{(?<key>.*?)\\}\\}", RegexOptions.Singleline | RegexOptions.IgnoreCase);
        
public static string ReplaceCell(string str, Dictionary<string, string> values)
        {
            foreach (Match match in reg_Cell.Matches(str))
            {
                var value = match.Value;
                var key = match.Groups["key"].ToString().Trim();
                if (values.ContainsKey(key))
                    str = str.Replace(value, values[key]);
            }
            return str;
        }

private void SaveContentXml(ZipFile templateFile, XmlDocument contentXml)
        {
            templateFile.RemoveEntry("content.xml");

            MemoryStream memStream = new MemoryStream();
            contentXml.InnerXml = contentXml.InnerXml.Replace("AssistanceTitle", "3. 您想要");
            contentXml.InnerXml = contentXml.InnerXml.Replace("ProductTitle", "4. 您要");
            contentXml.Save(memStream);
            memStream.Seek(0, SeekOrigin.Begin);

            templateFile.AddEntry("content.xml", memStream);
        }
    }