将文本文件转换为图像以便在.NET中预览

我有以下情况，我需要将文本文件（文本文件流）转换为小图像，然后将它们存储在数据库（SQL Server）中，以便以后可以在“预览”屏幕中显示它们。有人对如何做到这一点有什么建议吗？尤其是将文本文件转换为图像？

我认为将文本文件转换为图像不是解决问题的最佳方法。话虽如此，这里有一些示例代码可以帮助您开始

using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;

/// <summary>
/// A utility class to generate images from a string.
/// </summary>
public static class ImageMaker
{
    private static readonly ImageCodecInfo MyCodecInfo = GetEncoderInfo("image/jpeg");
    private static readonly EncoderParameters MyEncodeParameters = new EncoderParameters(1);

    static ImageMaker()
    {
        // Specify the quality for generated images.
        MyEncodeParameters.Param[0] = new EncoderParameter(Encoder.Quality, 95L);
    }

    /// <summary>
    /// Takes in a string and returns an image of that text.
    /// </summary>
    /// <param name="text">Text to put on an image.</param>
    /// <returns>Image instance.</returns>
    public static Image DrawText(string text)
    {
        // Create a bitmap to store the result.
        var destImage = new Bitmap(500, 700);

        // Create a graphic to draw the text on.
        Graphics graphic = Graphics.FromImage(destImage);
        graphic.FillRectangle(new SolidBrush(Color.White), 0, 0, destImage.Width, destImage.Height);

        graphic.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
        graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
        graphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

        var fontFamily = new FontFamily("Arial");
        var textRectangle = new Rectangle(0, 0, destImage.Width, destImage.Height);
        var format = new StringFormat();
        float emSize = graphic.DpiY * 10 / 72;

        // Create text path.
        var path = new GraphicsPath();
        path.AddString(text, fontFamily, (int)FontStyle.Regular, emSize, textRectangle, format);

        // Write path to graphic.
        var fillBrush = new SolidBrush(Color.FromKnownColor(KnownColor.Black));
        graphic.FillPath(fillBrush, path);

        return destImage;
    }

    /// <summary>
    /// Writes image to a stream.
    /// </summary>
    /// <param name="image">Image instance.</param>
    /// <param name="stream">Stream instance.</param>
    public static void WriteToStream(Image image, Stream stream)
    {
        image.Save(stream, MyCodecInfo, MyEncodeParameters);
    }

    /// <summary>
    /// Gets codec info for the specified MIME type.
    /// </summary>
    /// <param name="mimeType">MIME type name.</param>
    /// <returns>ImageCodecInfo instance or null if no matching info was found.</returns>
    private static ImageCodecInfo GetEncoderInfo(string mimeType)
    {
        ImageCodecInfo[] encoders = ImageCodecInfo.GetImageEncoders();
        return encoders.FirstOrDefault(t => t.MimeType == mimeType);
    }
}

干杯

---

PS-lipsum文本取自；）

我不认为将文本文件转换为图像是解决问题的最佳方法。话虽如此，这里有一些示例代码可以帮助您开始

using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;

/// <summary>
/// A utility class to generate images from a string.
/// </summary>
public static class ImageMaker
{
    private static readonly ImageCodecInfo MyCodecInfo = GetEncoderInfo("image/jpeg");
    private static readonly EncoderParameters MyEncodeParameters = new EncoderParameters(1);

    static ImageMaker()
    {
        // Specify the quality for generated images.
        MyEncodeParameters.Param[0] = new EncoderParameter(Encoder.Quality, 95L);
    }

    /// <summary>
    /// Takes in a string and returns an image of that text.
    /// </summary>
    /// <param name="text">Text to put on an image.</param>
    /// <returns>Image instance.</returns>
    public static Image DrawText(string text)
    {
        // Create a bitmap to store the result.
        var destImage = new Bitmap(500, 700);

        // Create a graphic to draw the text on.
        Graphics graphic = Graphics.FromImage(destImage);
        graphic.FillRectangle(new SolidBrush(Color.White), 0, 0, destImage.Width, destImage.Height);

        graphic.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
        graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
        graphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

        var fontFamily = new FontFamily("Arial");
        var textRectangle = new Rectangle(0, 0, destImage.Width, destImage.Height);
        var format = new StringFormat();
        float emSize = graphic.DpiY * 10 / 72;

        // Create text path.
        var path = new GraphicsPath();
        path.AddString(text, fontFamily, (int)FontStyle.Regular, emSize, textRectangle, format);

        // Write path to graphic.
        var fillBrush = new SolidBrush(Color.FromKnownColor(KnownColor.Black));
        graphic.FillPath(fillBrush, path);

        return destImage;
    }

    /// <summary>
    /// Writes image to a stream.
    /// </summary>
    /// <param name="image">Image instance.</param>
    /// <param name="stream">Stream instance.</param>
    public static void WriteToStream(Image image, Stream stream)
    {
        image.Save(stream, MyCodecInfo, MyEncodeParameters);
    }

    /// <summary>
    /// Gets codec info for the specified MIME type.
    /// </summary>
    /// <param name="mimeType">MIME type name.</param>
    /// <returns>ImageCodecInfo instance or null if no matching info was found.</returns>
    private static ImageCodecInfo GetEncoderInfo(string mimeType)
    {
        ImageCodecInfo[] encoders = ImageCodecInfo.GetImageEncoders();
        return encoders.FirstOrDefault(t => t.MimeType == mimeType);
    }
}

干杯

---

PS-lipsum文本取自；）

关于文本文件，你能告诉我们什么？它们是否包含Base64编码的JPEG图像？只是文本，我想将其转换，以便您可以将第一页视为图像，如屏幕截图。关于文本文件，您能告诉我们什么？它们是否包含Base64编码的JPEG图像？只是文本，我想转换它，以便您可以将第一页视为图像，如屏幕截图。好的，我将尝试代码，但您认为解决此问题的更好方法是什么？如果只显示文本，然后可能从数据库中获取文本片段，并简单地在某种工具提示窗口中显示它。好的，我将尝试代码，但您认为解决此问题的更好方法是什么？如果只显示文本，然后可能从数据库中获取该文本的片段，并简单地在某种工具提示窗口中显示它。