PM> Install-Package FreeSpire.Doc

using Spire.Doc;
using Spire.Doc.Documents;
using Spire.Doc.Fields;
using System.Drawing;

namespace CreateWordByReplacingPlaceholders
{
    class Program
    {
        static void Main(string[] args)
        {
            // Initialize a new Document object
            Document document = new Document();

            // Load the template Word file
            document.LoadFromFile("C:\Users\Administrator\Desktop\template.docx");

            // Dictionary to hold placeholders and their replacements
            Dictionary<string, string> replaceDict = new Dictionary<string, string>
            {
                { "#name#", "李四" },
                { "#gender#", "男" },
                { "#birthdate#", "1990年3月20日" },
                { "#address#", "西安北路街道" },
                { "#city#", "成都" },
                { "#province#", "四川" },
                { "#postal#", "610000" },
                { "#country#", "中國" }
            };

            // Replace placeholders in the document with corresponding values
            foreach (KeyValuePair<string, string> kvp in replaceDict)
            {
                document.Replace(kvp.Key, kvp.Value, true, true);
            }

            // Path to the image file
            String imagePath = "C:\Users\Administrator\Desktop\portrait.png";

            // Replace the placeholder for the photograph with an image
            ReplaceTextWithImage(document, "#photo#", imagePath);

            // Save the modified document
            document.SaveToFile("ReplacePlaceholders.docx", FileFormat.Docx);

            // Release resources
            document.Dispose();
        }

        // Method to replace a placeholder in the document with an image
        static void ReplaceTextWithImage(Document document, String stringToReplace, String imagePath)
        {
            // Load the image from the specified path
            Image image = Image.FromFile(imagePath);
            DocPicture pic = new DocPicture(document);
            pic.LoadImage(image);
            pic.Width = 130;

            // Find the placeholder in the document
            TextSelection selection = document.FindString(stringToReplace, false, true);

            // Get the range of the found text
            TextRange range = selection.GetAsOneRange();
            int index = range.OwnerParagraph.ChildObjects.IndexOf(range);

            // Insert the image and remove the placeholder text
            range.OwnerParagraph.ChildObjects.Insert(index, pic);
            range.OwnerParagraph.ChildObjects.Remove(range);
        }
    }
}

Dictionary<string, string> replaceDict = new Dictionary<string, string>
{
    { "#name#", "李四" },
    { "#gender#", "男" },
    // ... 其他字段
};