PM> Install-Package Spire.Doc

using Spire.Doc;
using System;

namespace ConvertWordToPng
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建 Document 类的对象
            Document doc = new Document();

            //载入Word文档
            doc.LoadFromFile(@"C:\示例.docx");

            //将Word文档保存为RTF文档
            doc.SaveToFile("Word转RTF.rtf", FileFormat.Rtf);
        }
    }
}

Imports Spire.Doc
Imports System

Namespace ConvertWordToPng
    Class Program
        Shared Sub Main(ByVal args() As String)
            '创建 Document 类的对象
            Dim doc As Document = New Document()

            '载入Word文档
            doc.LoadFromFile("https://cdn.e-iceblue.cn/C:\示例.docx")

            '将Word文档保存为RTF文档
            doc.SaveToFile("Word转RTF.rtf", FileFormat.Rtf)
        End Sub
    End Class
End Namespace

using Spire.Doc;
using System;

namespace ConvertWordToPng
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建 Document 类的对象
            Document doc = new Document();

            //载入RTF文档
            doc.LoadFromFile(@"C:\示例.rtf", FileFormat.Rtf);

            //将RTF文档保存为Word文档
            doc.SaveToFile("RTF转Word.docx", FileFormat.Docx2013);
        }
    }
}

Imports Spire.Doc
Imports System

Namespace ConvertWordToPng
    Class Program
        Shared Sub Main(ByVal args() As String)
            '创建 Document 类的对象
            Dim doc As Document = New Document()

            '载入RTF文件
            doc.LoadFromFile("https://cdn.e-iceblue.cn/C:\示例.rtf", FileFormat.Rtf)

            '将RTF文件保存为Word文档
            doc.SaveToFile("RTF转Word.docx", FileFormat.Docx2013)
        End Sub
    End Class
End Namespace

PM> Install-Package Spire.Doc

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

namespace ConvertWordToJPG
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建 Document 类的对象
            Document doc = new Document();

            //载入Word文档
            doc.LoadFromFile(@"C:\示例.docx");

            //将整个文档的页面分别转换为图片
            Image[] images = doc.SaveToImages(ImageType.Bitmap);

            //在转换出的图片集合中循环
            for (int i = 0; i < images.Length; i++)
            {
                //将图片保存的JPG文件
                string outputfile = String.Format("图片-{0}.jpg", i);
                images[i].Save(outputfile, ImageFormat.Jpeg);
            }
        }
    }
}

Imports Spire.Doc
Imports Spire.Doc.Documents
Imports System
Imports System.Drawing
Imports System.Drawing.Imaging

Namespace ConvertWordToJPG
    Class Program
        Shared Sub Main(ByVal args() As String)
            '创建 Document 类的对象
            Dim doc As Document = New Document()

            '载入Word文档
            doc.LoadFromFile("https://cdn.e-iceblue.cn/C:\示例.docx")

            '将整个文档的页面分别转换为图片
            Dim images() As Image = doc.SaveToImages(ImageType.Bitmap)

            '在转换出的图片集合中循环
            Dim i As Integer
            For i = 0 To images.Length - 1 Step i + 1
                '将图片保存的JPG文件
                Dim outputfile As String = String.Format("图片-{0}.jpg", i)
                images(i).Save(outputfile, ImageFormat.Jpeg)
            Next
        End Sub
    End Class
End Namespace

using Spire.Doc;
using System;
using System.Collections.Generic;
using System.IO;

namespace CovnertWordToSVG
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建 Document 类的对象
            Document doc = new Document();

            //载入Word文档
            doc.LoadFromFile(@"C:\示例.docx");

            //将文档保存为一系列字节数组
            Queue<byte[]> svgBytes = doc.SaveToSVG();

            //循环遍历所有字节数组
            for (int i = 0; i < svgBytes.Count; i++)
            {
                //将数组写入SVG文件
                byte[][] bytes = svgBytes.ToArray();
                string outputfile = String.Format("图片-{0}.svg", i);
                FileStream fs = new FileStream(outputfile, FileMode.Create);
                fs.Write(bytes[i], 0, bytes[i].Length);
                fs.Close();
            }
        }
    }
}

Imports Spire.Doc
Imports System
Imports System.Collections.Generic
Imports System.IO

Namespace CovnertWordToSVG
    Class Program
        Shared Sub Main(ByVal args() As String)
            '创建 Document 类的对象
            Dim doc As Document = New Document()

            '载入Word文档
            doc.LoadFromFile("https://cdn.e-iceblue.cn/C:\示例.docx")

            '将文档保存为一系列字节数组
            Dim svgBytes()> As Queue<Byte =  doc.SaveToSVG() 
 
            '循环遍历所有字节数组
            Dim i As Integer
            For i = 0 To svgBytes.Count - 1 Step i + 1
                '将数组写入SVG文件
                Dim bytes()() As Byte = svgBytes.ToArray()
                Dim outputfile As String = String.Format("图片-{0}.svg", i)
                Dim fs As FileStream = New FileStream(outputfile, FileMode.Create)
                fs.Write(bytes(i), 0, bytes(i).Length)
                fs.Close()
            Next
        End Sub
    End Class
End Namespace

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

namespace ConvertWordToPng
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建 Document 类的对象
            Document doc = new Document();

            //载入 Word 文档
            doc.LoadFromFile(@"C:\示例.docx");

            //将整个Word文档转换为位图集合
            Image[] images = doc.SaveToImages(ImageType.Metafile);

            //循环遍历位图集合中的位图
            for (int i = 0; i < images.Length; i++)
            {
                //设置图片的分辨率
                Image newimage = ResetResolution(images[i] as Metafile, 150);

                //将图片保存为PNG文件
                string outputfile = String.Format("图片-{0}.png", i);
                newimage.Save(outputfile, ImageFormat.Png);
            }
        }

        //设置图片分辨率
        public static Image ResetResolution(Metafile mf, float resolution)
        {
            int width = (int)(mf.Width * resolution / mf.HorizontalResolution);
            int height = (int)(mf.Height * resolution / mf.VerticalResolution);
            Bitmap bmp = new Bitmap(width, height);
            bmp.SetResolution(resolution, resolution);
            using (Graphics g = Graphics.FromImage(bmp))
            {
                g.DrawImage(mf, Point.Empty);
            }
            return bmp;
        }
    }
}

Imports Spire.Doc
Imports System
Imports System.Drawing
Imports System.Drawing.Imaging
Imports Spire.Doc.Documents

Namespace ConvertWordToPng
    Class Program
        Shared Sub Main(ByVal args() As String)
            '创建 Document 类的对象
            Dim doc As Document = New Document()

            '载入 Word 文档
            doc.LoadFromFile("https://cdn.e-iceblue.cn/C:\示例.docx")

            '将整个Word文档转换为位图集合
            Dim images() As Image = doc.SaveToImages(ImageType.Metafile)

            '循环遍历位图集合中的位图
            Dim i As Integer
            For i = 0 To images.Length - 1 Step i + 1
                '设置图片的分辨率
                Dim Newimage As Image = ResetResolution(images(i) As Metafile, 150)

                '将图片保存为PNG文件
                Dim outputfile As String = String.Format("图片-{0}.png", i)
                Newimage.Save(outputfile, ImageFormat.Png)
            Next
        End Sub

        '设置图片分辨率
        Public Shared Function ResetResolution(ByVal mf As Metafile, ByVal resolution As Single) As Image
            Dim width As Integer = CType((mf.Width * resolution / mf.HorizontalResolution), Integer)
            Dim height As Integer = CType((mf.Height * resolution / mf.VerticalResolution), Integer)
            Dim bmp As Bitmap = New Bitmap(width, height)
            bmp.SetResolution(resolution, resolution)
            Imports (Graphics g = Graphics.FromImage(bmp))
            {
                g.DrawImage(mf, PoInteger.Empty)
            }
            Return bmp
        End Function
    End Class
End Namespace

PM> Install-Package Spire.XLS

using Spire.Xls;

namespace LockCells
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建 Workbook 类的对象
            Workbook workbook = new Workbook();

            //载入 Excel 表格
            workbook.LoadFromFile(@"C:\示例.xlsx");

            //获取第一个工作表
            Worksheet sheet = workbook.Worksheets[0];

            //解锁该工作表中所有已使用的单元格
            CellRange usedRange = sheet.Range;
            usedRange.Style.Locked = false;

            //锁定指定单元格
            CellRange cells = sheet.Range["A1:F2"];
            cells.Style.Locked = true;

            //用密码保护该工作表
            sheet.Protect("123456", SheetProtectionType.All);

            //保存 Excel 表格
            workbook.SaveToFile("锁定单元格.xlsx", ExcelVersion.Version2016);
        }
    }
}

Imports Spire.Xls

Namespace LockCells
    Class Program
        Shared Sub Main(ByVal args() As String)
            '创建 Workbook 类的对象
            Dim workbook As Workbook = New Workbook()

            '载入 Excel 表格
            workbook.LoadFromFile("C:\示例.xlsx")

            '获取第一个工作表
            Dim sheet As Worksheet = workbook.Worksheets(0)

            '解锁该工作表中所有已使用的单元格
            Dim usedRange As CellRange = sheet.Range
            usedRange.Style.Locked = False

            '锁定指定单元格
            Dim cells As CellRange = sheet.Range("A1:F2")
            cells.Style.Locked = True

            '用密码保护该工作表
            sheet.Protect("123456", SheetProtectionType.All)

            '保存 Excel 表格
            workbook.SaveToFile("锁定单元格.xlsx", ExcelVersion.Version2016)
        End Sub
    End Class
End Namespace

PM> Install-Package Spire.Doc

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

namespace FindAndHighlightText
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //创建 Document 类的对象
            Document document = new Document();

            //载入Word文档
            document.LoadFromFile(@"C:/示例.docx");

            //找到所有匹配的文本
            TextSelection[] text = document.FindAllString("庄子", false, true);

            //循环遍历所有匹配的文本，并设置突出显示
            foreach (TextSelection seletion in text)
            {
                seletion.GetAsOneRange().CharacterFormat.HighlightColor = Color.Yellow;
            }

            //保存文档
            document.SaveToFile("查找并突出显示文本.docx", FileFormat.Docx);
        }
    }
}

Imports System
Imports System.Drawing
Imports Spire.Doc
Imports Spire.Doc.Documents

Namespace FindAndHighlightText
    Friend Class Program
        Shared Sub Main(ByVal args() As String)
            '创建 Document 类的对象
            Dim document As Document = New Document()

            '载入Word文档
            document.LoadFromFile("C:/示例.docx")

            '找到所有匹配的文本
            Dim text() As TextSelection = document.FindAllString("庄子", False, True)

            '循环遍历所有匹配的文本，并设置突出显示
            Dim seletion As TextSelection
            For Each seletion In text
                seletion.GetAsOneRange().CharacterFormat.HighlightColor = Color.Yellow
            Next

            '保存文档
            document.SaveToFile("查找并突出显示文本.docx", FileFormat.Docx)
        End Sub
    End Class
End Namespace