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POOpen xml replace text from word file and return memory stream using MVC
 

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    <p>I have an word file that contain my specified pattern text {pattern} and I want to replace those pattern with new my string which was read from database. So I used open xml read stream from my docx template file the replace my pattern string then returned to stream which support to download file without create a temporary file. But when I opened it generated me error on docx file. Below is my example code</p> <pre><code>public ActionResult SearchAndReplace(string FilePath) { MemoryStream mem = new MemoryStream(System.IO.File.ReadAllBytes(FilePath)); using (WordprocessingDocument wordDoc = WordprocessingDocument.Open(mem, true)) { string docText = null; using (StreamReader sr = new StreamReader(wordDoc.MainDocumentPart.GetStream())) { docText = sr.ReadToEnd(); } Regex regexText = new Regex("Hello world!"); docText = regexText.Replace(docText, "Hi Everyone!"); //Instead using this code below to write text back the original file. I write new string back to memory stream and return to a stream download file //using (StreamWriter sw = new //StreamWriter(wordDoc.MainDocumentPart.GetStream(FileMode.Create))) //{ // sw.Write(docText); //} using (StreamWriter sw = new StreamWriter(mem)) { sw.Write(docText); } } mem.Seek(0, SeekOrigin.Begin); return File(mem, "application/octet-stream","download.docx"); //Return to download file } </code></pre> <p>Please suggest me any solutions instead read a text from a word file and replace those expected pattern text then write data back to the original file. Are there any solutions replace text with WordprocessingDocument libary? How can I return to memory stream with validation docx file format?</p>
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