57 lines
1.7 KiB
C#
57 lines
1.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.IO;
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using System.Text;
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namespace Nirvana.Common
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{
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public class ImageUtil
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{
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/// <summary>
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/// 图片转BASE64编码
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/// </summary>
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/// <param name="bmp"></param>
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/// <returns></returns>
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public static string ImgToBase64String(Bitmap bmp)
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{
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MemoryStream ms = new MemoryStream();
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bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
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byte[] arr = new byte[ms.Length];
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ms.Position = 0;
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ms.Read(arr, 0, (int)ms.Length);
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ms.Close();
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String strbaser64 = Convert.ToBase64String(arr);
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return strbaser64;
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}
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/// <summary>
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/// 图片转BASE64编码
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/// </summary>
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/// <param name="path"></param>
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/// <returns></returns>
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public static string ImgToBase64String(string path)
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{
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FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
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byte[] byteData = new byte[fs.Length];
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fs.Read(byteData, 0, byteData.Length);
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fs.Close();
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string data = Convert.ToBase64String(byteData);
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return data;
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}
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/// <summary>
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/// Base64转图片
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/// </summary>
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/// <param name="base64Img">Base64编码</param>
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/// <returns></returns>
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public static Bitmap Base64StringToImage(string base64Img)
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{
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byte[] bytes = Convert.FromBase64String(base64Img);
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MemoryStream ms = new MemoryStream();
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ms.Write(bytes, 0, bytes.Length);
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Bitmap bmp = new Bitmap(ms);
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return bmp;
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}
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}
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}
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