ASP.NET MVC5+EF6+EasyUI 后台管理系统(57)-插件---ueditor使用

目录:

  1. 前言
  2. 开发环境
  3. 知识点
  4. 初始使用
  5. 自定义工具栏
  6. 设置和读取编辑器内容
  7. 文件上传
  8. ueditor加水印

------------------------------------------------

下载地址在尾部

1.前言:之前一直用KingEditor富文本编辑器,在国产编辑器中算是顶尖的插件。但是这个编辑器集成度较差,也很久没有更新了,今天学习百度产品UEeditor使用!

2.开发环境:VS2013+MVC5

3.知识点:上传加水印功能

下载编辑器

各自选择自己语言的版本。我这里是.net版本就选择.net版本 UTF-8

同时可以选择Mini版本,Mini版本在日常也是够用的。开发版功能比较齐全,包括在线编辑WORD,地图,图表等功能。如果是普通的,比如博客类的,回复类使用的,使用mini版比较何时。

4.初次开始:

新建MVC5项目名为UEeditorForMVC,并解压下载的ueditor到Script文件夹下,utf8-net改名为UEeditor

初始部署使用:修改index.cshtml

@{
    ViewBag.Title = "Home Page";
}
<script src="~/Scripts/ueditor/ueditor.config.js"></script>
<script src="~/Scripts/ueditor/ueditor.all.min.js"></script>
<script>
    //加载编辑器
    var ue = UE.getEditor('container', {
    });
</script>
<script id="container" name="content" style=" height: 228px; " type="text/plain">
</script>

运行后出现效果,证明配置已经成功!

5.配置工具栏

有时候我们需要自定义工具栏,2个地方可以进行配置,一个是全局的配置文件ueitor.config.js,修改这个文件将导致整站所有编辑器一并修改

单独配置在加载编辑器时候触发:

<script>
    //加载编辑器
    var ue = UE.getEditor('container', {
        toolbars: [[
                'fullscreen', 'source',
                'bold', 'italic', 'underline', 'forecolor', 'insertorderedlist',
               'fontfamily', 'fontsize',
                'justifyleft', 'justifycenter',
                'link', 'unlink',
                'simpleupload', 'snapscreen'
        ]]
    });
</script>

这个加载可以发现与config.js是对应的。包括接口路径,主题等,都可以单独配置

效果如下,我只配置了最常用的工具栏

6.设置和读取编辑器内容

 ue.ready(function() {
        //设置编辑器的内容
        ue.setContent('hello');
        //获取html内容,返回: <p>hello</p>
        var html = ue.getContent();
        //获取纯文本内容,返回: hello
        var txt = ue.getContentTxt();
    });

可以设置编辑器的内容。比如文章可以获取后调用

ue.setContent('hello');为编辑器设置内容

具体参考官方文档

7.文件上传

文件上传是本文的主要内容,我们必须了解一下接口。

controller.ashx 这是一个处理文件,继承IHttpHandler接口。所有文件的上传必须经过这个文件处理

App_Code文件夹下的UploadHandler.cs为上传处理文件。

执行顺序由controller.ashx判断处理后调用UploadHandler。

初始上传会成功,但是没有图片显示

这是因为路径文件造成

研究发现net根目录下有文件config.json。这个是一个json格式的配置文件

这里可以配置所有上传时候的参数包括,上传路径,文件命名,远程抓取路径等

我们这里只修改第11行代码即可

 "imageUrlPrefix": "/Scripts/ueditor/net/", /* 图片访问路径前缀 */

修改上传路径:在62行

8.加入水印

既然我们知道修改文件为上传文件,那么修改上传处理逻辑可以加入水印

添加一个水印类

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


    public class WaterMark
    {
        /// <summary>
        /// 图片水印
        /// </summary>
        /// <param name="imgPath">服务器图片相对路径</param>
        /// <param name="filename">保存文件名</param>
        /// <param name="watermarkFilename">水印文件相对路径</param>
        /// <param name="watermarkStatus">图片水印位置 0=不使用 1=左上 2=中上 3=右上 4=左中  9=右下</param>
        /// <param name="quality">附加水印图片质量,0-100</param>
        /// <param name="watermarkTransparency">水印的透明度 1--10 10为不透明</param>
        public static void AddImageSignPic(string imgPath, string filename, string watermarkFilename, int watermarkStatus, int quality, int watermarkTransparency)
        {
            if(!File.Exists(imgPath))
                return;
            byte[] _ImageBytes = File.ReadAllBytes(imgPath);
            Image img = Image.FromStream(new System.IO.MemoryStream(_ImageBytes));

            watermarkFilename = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, watermarkFilename);
            if (!File.Exists(watermarkFilename))
                return;
            Graphics g = Graphics.FromImage(img);
            //设置高质量插值法
            //g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
            //设置高质量,低速度呈现平滑程度
            //g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            Image watermark = new Bitmap(watermarkFilename);

            if (watermark.Height >= img.Height || watermark.Width >= img.Width)
                return;

            ImageAttributes imageAttributes = new ImageAttributes();
            ColorMap colorMap = new ColorMap();

            colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
            colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
            ColorMap[] remapTable = { colorMap };

            imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);

            float transparency = 0.5F;
            if (watermarkTransparency >= 1 && watermarkTransparency <= 10)
                transparency = (watermarkTransparency / 10.0F);


            float[][] colorMatrixElements = {
                                                new float[] {1.0f,  0.0f,  0.0f,  0.0f, 0.0f},
                                                new float[] {0.0f,  1.0f,  0.0f,  0.0f, 0.0f},
                                                new float[] {0.0f,  0.0f,  1.0f,  0.0f, 0.0f},
                                                new float[] {0.0f,  0.0f,  0.0f,  transparency, 0.0f},
                                                new float[] {0.0f,  0.0f,  0.0f,  0.0f, 1.0f}
                                            };

            ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements);

            imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);

            int xpos = 0;
            int ypos = 0;

            switch (watermarkStatus)
            {
                case 1:
                    xpos = (int)(img.Width * (float).01);
                    ypos = (int)(img.Height * (float).01);
                    break;
                case 2:
                    xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
                    ypos = (int)(img.Height * (float).01);
                    break;
                case 3:
                    xpos = (int)((img.Width * (float).99) - (watermark.Width));
                    ypos = (int)(img.Height * (float).01);
                    break;
                case 4:
                    xpos = (int)(img.Width * (float).01);
                    ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
                    break;
                case 5:
                    xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
                    ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
                    break;
                case 6:
                    xpos = (int)((img.Width * (float).99) - (watermark.Width));
                    ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
                    break;
                case 7:
                    xpos = (int)(img.Width * (float).01);
                    ypos = (int)((img.Height * (float).99) - watermark.Height);
                    break;
                case 8:
                    xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
                    ypos = (int)((img.Height * (float).99) - watermark.Height);
                    break;
                case 9:
                    xpos = (int)((img.Width * (float).99) - (watermark.Width));
                    ypos = (int)((img.Height * (float).99) - watermark.Height);
                    break;
            }

            g.DrawImage(watermark, new Rectangle(xpos, ypos, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel, imageAttributes);

            ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
            ImageCodecInfo ici = null;
            foreach (ImageCodecInfo codec in codecs)
            {
                if (codec.MimeType.IndexOf("jpeg") > -1)
                    ici = codec;
            }
            EncoderParameters encoderParams = new EncoderParameters();
            long[] qualityParam = new long[1];
            if (quality < 0 || quality > 100)
                quality = 80;

            qualityParam[0] = quality;

            EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);
            encoderParams.Param[0] = encoderParam;

            if (ici != null)
                img.Save(filename, ici, encoderParams);
            else
                img.Save(filename);

            g.Dispose();
            img.Dispose();
            watermark.Dispose();
            imageAttributes.Dispose();
        }

        /// <summary>
        /// 文字水印
        /// </summary>
        /// <param name="imgPath">服务器图片相对路径</param>
        /// <param name="filename">保存文件名</param>
        /// <param name="watermarkText">水印文字</param>
        /// <param name="watermarkStatus">图片水印位置 0=不使用 1=左上 2=中上 3=右上 4=左中  9=右下</param>
        /// <param name="quality">附加水印图片质量,0-100</param>
        /// <param name="fontname">字体</param>
        /// <param name="fontsize">字体大小</param>
        public static void AddImageSignText(string imgPath, string filename, string watermarkText, int watermarkStatus, int quality, string fontname, int fontsize)
        {
            byte[] _ImageBytes = File.ReadAllBytes(imgPath);
            Image img = Image.FromStream(new System.IO.MemoryStream(_ImageBytes));
       
            Graphics g = Graphics.FromImage(img);
            Font drawFont = new Font(fontname, fontsize, FontStyle.Regular, GraphicsUnit.Pixel);
            SizeF crSize;
            crSize = g.MeasureString(watermarkText, drawFont);

            float xpos = 0;
            float ypos = 0;

            switch (watermarkStatus)
            {
                case 1:
                    xpos = (float)img.Width * (float).01;
                    ypos = (float)img.Height * (float).01;
                    break;
                case 2:
                    xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
                    ypos = (float)img.Height * (float).01;
                    break;
                case 3:
                    xpos = ((float)img.Width * (float).99) - crSize.Width;
                    ypos = (float)img.Height * (float).01;
                    break;
                case 4:
                    xpos = (float)img.Width * (float).01;
                    ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
                    break;
                case 5:
                    xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
                    ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
                    break;
                case 6:
                    xpos = ((float)img.Width * (float).99) - crSize.Width;
                    ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
                    break;
                case 7:
                    xpos = (float)img.Width * (float).01;
                    ypos = ((float)img.Height * (float).99) - crSize.Height;
                    break;
                case 8:
                    xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
                    ypos = ((float)img.Height * (float).99) - crSize.Height;
                    break;
                case 9:
                    xpos = ((float)img.Width * (float).99) - crSize.Width;
                    ypos = ((float)img.Height * (float).99) - crSize.Height;
                    break;
            }

            g.DrawString(watermarkText, drawFont, new SolidBrush(Color.White), xpos + 1, ypos + 1);
            g.DrawString(watermarkText, drawFont, new SolidBrush(Color.Black), xpos, ypos);

            ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
            ImageCodecInfo ici = null;
            foreach (ImageCodecInfo codec in codecs)
            {
                if (codec.MimeType.IndexOf("jpeg") > -1)
                    ici = codec;
            }
            EncoderParameters encoderParams = new EncoderParameters();
            long[] qualityParam = new long[1];
            if (quality < 0 || quality > 100)
                quality = 80;

            qualityParam[0] = quality;

            EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);
            encoderParams.Param[0] = encoderParam;

            if (ici != null)
                img.Save(filename, ici, encoderParams);
            else
                img.Save(filename);

            g.Dispose();
            img.Dispose();
        }


        /// <summary>
        /// 返回文件扩展名,不含“.”
        /// </summary>
        /// <param name="_filepath">文件全名称</param>
        /// <returns>string</returns>
        public static string GetFileExt(string _filepath)
        {
            if (string.IsNullOrEmpty(_filepath))
            {
                return "";
            }
            if (_filepath.LastIndexOf(".") > 0)
            {
                return _filepath.Substring(_filepath.LastIndexOf(".") + 1); //文件扩展名,不含“.”
            }
            return "";
        }

 

        public static string GetRamCode()
        {
            return DateTime.Now.ToString("yyyyMMddHHmmssffff");
        }
    }

/// <summary>

/// 文字水印 /// </summary> /// <param name="imgPath">服务器图片相对路径</param> /// <param name="filename">保存文件名</param> /// <param name="watermarkText">水印文字</param> /// <param name="watermarkStatus">图片水印位置 0=不使用 1=左上 2=中上 3=右上 4=左中 9=右下</param> /// <param name="quality">附加水印图片质量,0-100</param> /// <param name="fontname">字体</param> /// <param name="fontsize">字体大小</param>

AddImageSignPic方法参数解析

这样我们修改自带的UploadHandler.cs第68行try方法为

 try
        {
            if (!Directory.Exists(Path.GetDirectoryName(localPath)))
            {
                Directory.CreateDirectory(Path.GetDirectoryName(localPath));
            }
            file.SaveAs(localPath);
            WaterMark.AddImageSignText(localPath, localPath,
                           "ymnets", 9,
                          80, "Tahoma", 12);

            //WaterMark.AddImageSignPic(serverFileName, serverFileName,
            //              "传入水印图片路径", 9,
            //              80, 5);
            Result.Url = savePath;
            Result.State = UploadState.Success;
        }

保存后调用写水印函数,完整的

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web;

/// <summary>
/// UploadHandler 的摘要说明
/// </summary>
public class UploadHandler : Handler
{

    public UploadConfig UploadConfig { get; private set; }
    public UploadResult Result { get; private set; }

    public UploadHandler(HttpContext context, UploadConfig config)
        : base(context)
    {
        this.UploadConfig = config;
        this.Result = new UploadResult() { State = UploadState.Unknown };
    }

    public override void Process()
    {
        byte[] uploadFileBytes = null;
        string uploadFileName = null;

        if (UploadConfig.Base64)
        {
            uploadFileName = UploadConfig.Base64Filename;
            uploadFileBytes = Convert.FromBase64String(Request[UploadConfig.UploadFieldName]);
        }
        else
        {
            var file = Request.Files[UploadConfig.UploadFieldName];
            uploadFileName = file.FileName;

            if (!CheckFileType(uploadFileName))
            {
                Result.State = UploadState.TypeNotAllow;
                WriteResult();
                return;
            }
            if (!CheckFileSize(file.ContentLength))
            {
                Result.State = UploadState.SizeLimitExceed;
                WriteResult();
                return;
            }

            uploadFileBytes = new byte[file.ContentLength];
            try
            {
                file.InputStream.Read(uploadFileBytes, 0, file.ContentLength);
            }
            catch (Exception)
            {
                Result.State = UploadState.NetworkError;
                WriteResult();
            }
    

        Result.OriginFileName = uploadFileName;

        var savePath = PathFormatter.Format(uploadFileName, UploadConfig.PathFormat);
        var localPath = Server.MapPath(savePath);
        try
        {
            if (!Directory.Exists(Path.GetDirectoryName(localPath)))
            {
                Directory.CreateDirectory(Path.GetDirectoryName(localPath));
            }
            file.SaveAs(localPath);
            WaterMark.AddImageSignText(localPath, localPath,
                           "ymnets", 9,
                          80, "Tahoma", 12);

            //WaterMark.AddImageSignPic(serverFileName, serverFileName,
            //              "传入水印图片路径", 9,
            //              80, 5);
            Result.Url = savePath;
            Result.State = UploadState.Success;
        }
        catch (Exception e)
        {
            Result.State = UploadState.FileAccessError;
            Result.ErrorMessage = e.Message;
        }
        finally
        {
            WriteResult();
        }
        }
    }

    private void WriteResult()
    {
        this.WriteJson(new
        {
            state = GetStateMessage(Result.State),
            url = Result.Url,
            title = Result.OriginFileName,
            original = Result.OriginFileName,
            error = Result.ErrorMessage
        });
    }

    private string GetStateMessage(UploadState state)
    {
        switch (state)
        {
            case UploadState.Success:
                return "SUCCESS";
            case UploadState.FileAccessError:
                return "文件访问出错,请检查写入权限";
            case UploadState.SizeLimitExceed:
                return "文件大小超出服务器限制";
            case UploadState.TypeNotAllow:
                return "不允许的文件格式";
            case UploadState.NetworkError:
                return "网络错误"; 
        }
        return "未知错误";
    }

    private bool CheckFileType(string filename)
    {
        var fileExtension = Path.GetExtension(filename).ToLower();
        return UploadConfig.AllowExtensions.Select(x => x.ToLower()).Contains(fileExtension);
    }

    private bool CheckFileSize(int size)
    {
        return size < UploadConfig.SizeLimit;
    }
}

public class UploadConfig
{
    /// <summary>
    /// 文件命名规则
    /// </summary>
    public string PathFormat { get; set; }

    /// <summary>
    /// 上传表单域名称
    /// </summary>
    public string UploadFieldName { get; set; }

    /// <summary>
    /// 上传大小限制
    /// </summary>
    public int SizeLimit { get; set; }

    /// <summary>
    /// 上传允许的文件格式
    /// </summary>
    public string[] AllowExtensions { get; set; }

    /// <summary>
    /// 文件是否以 Base64 的形式上传
    /// </summary>
    public bool Base64 { get; set; }

    /// <summary>
    /// Base64 字符串所表示的文件名
    /// </summary>
    public string Base64Filename { get; set; }
}

public class UploadResult
{
    public UploadState State { get; set; }
    public string Url { get; set; }
    public string OriginFileName { get; set; }

    public string ErrorMessage { get; set; }
}

public enum UploadState
{
    Success = 0,
    SizeLimitExceed = -1,
    TypeNotAllow = -2,
    FileAccessError = -3,
    NetworkError = -4,
    Unknown = 1,
}

这次我们再次上传预览效果

成功生成一个文字水印。这个水印类也包含了图片LOGO形式的

 WaterMark.AddImageSignPic(serverFileName, serverFileName,
             "传入水印图片路径", 9,
              80, 5);

注掉文字的替换这句:

我下载了博客园的LOGO,那么结果显然

模糊度和图片透明度都有关系.

文章内容到此结束,如果有关于ueditor的疑问欢迎留言!更多高级功能请访问官方网站

 实例下载地址

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