问如何在C#中以编程方式更改文本字段？

EN

static void Main(string[] args)
    {
        // just gets me the current location of the assembly to get a full path
        string fileName = GetFilePath("Resource\\Template.pptx");

        // open the presentation in edit mode -> the bool parameter stands for 'isEditable'
        using (PresentationDocument document = PresentationDocument.Open(fileName, true))
        {
            // going through the slides of the presentation
            foreach (SlidePart slidePart in document.PresentationPart.SlideParts)
            {
                // searching for a text with the placeholder i want to replace
                DocumentFormat.OpenXml.Drawing.Text text = 
                    slidePart.RootElement.Descendants<DocumentFormat.OpenXml.Drawing.Text>().FirstOrDefault(x => x.Text == "[[TITLE]]");

                // change the text
                if (text != null)
                    text.Text = "My new cool title";

                // searching for the second text with the placeholder i want to replace
                text =
                    slidePart.RootElement.Descendants<DocumentFormat.OpenXml.Drawing.Text>().FirstOrDefault(x => x.Text == "[[SUBTITLE]]");

                // change the text
                if (text != null)
                    text.Text = "My new cool sub-title";
            }

            document.Save();
        }
    }