打开XML SDK - 保存模板文件（.xltx为.xlsx）

问题描述

我有以下代码打开Excel模板文件并保存为.xlsx文件，当我尝试打开新文件时，我会收到以下错误。请帮助解决这个问题。

I have the following code to open Excel template file and save it as .xlsx file and I get the error below when I try to open the new file. Please help to resolve this.

由于文件格式或扩展名无效，Excel无法打开文件sa123.xlsx。验证文件未被损坏，文件扩展名是否与文件格式相符。

        string templateName = "C:\\temp\\sa123.xltx";
        byte[] docAsArray = File.ReadAllBytes(templateName);
        using (MemoryStream stream = new MemoryStream())
        {
            stream.Write(docAsArray, 0, docAsArray.Length);    // THIS performs doc copy
            File.WriteAllBytes("C:\\temp\\sa123.xlsx", stream.ToArray());
        }

推荐答案

为了做到这一点将需要使用。以下是我尝试过的代码片段：

In order to do this you will need to use the Open XML SDK 2.0. Below is a snippet of code that worked for me when I tried it:

byte[] byteArray = File.ReadAllBytes("C:\\temp\\sa123.xltx");
using (MemoryStream stream = new MemoryStream())
{
    stream.Write(byteArray, 0, (int)byteArray.Length);
    using (SpreadsheetDocument spreadsheetDoc = SpreadsheetDocument.Open(stream, true))
    {
       // Change from template type to workbook type
       spreadsheetDoc.ChangeDocumentType(SpreadsheetDocumentType.Workbook);
    }
    File.WriteAllBytes("C:\\temp\\sa123.xlsx", stream.ToArray());
}

这段代码是做什么的，它需要你的模板文件， a href =http://msdn.microsoft.com/en-us/library/documentformat.openxml.packaging.spreadsheetdocument.aspx =noreferrer> SpreadsheetDocument 对象。该对象的类型是 Template ，但是由于您希望将其作为工作簿，您可以调用 ChangeDocumentType 方法将其从模板更改为工作簿。这将工作，因为基础XML在.xltx和.xlsx文件之间是相同的，它只是导致您出现问题的类型。

What this code does is it takes your template file and opens it into a SpreadsheetDocument object. The type of this object is Template, but since you want it as a Workbook you call the ChangeDocumentType method to change it from a Template to a Workbook. This will work since the underlying XML is the same between a .xltx and a .xlsx file and it was just the type that was causing you an issue.

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