base64转换为图像在C＃ [英] Convert base64 to Image in c#

问题描述

我使用MVC＃。当我尝试转换为Base64的字符串作为图像时，图像是没有得到打开。我从JavaScript越来越的base64字符串，并coverting，为图像控制器。这里是我的code。

  VAR的base64 = \"data:image/png;base64,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...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\";字节[]海峡= System.Text.Encoding.Uni code.GetBytes的（Base64）;
VAR缓冲= Convert.FromBase64String（Convert.ToBase64String（STR））;
var文件=使用Server.Mappath（〜/内容/图片/ err.png）;
System.IO.File.WriteAllBytes（文件，缓冲液）;
图片IMG =新的图像（）;
img.ImageUrl =使用Server.Mappath（〜/内容/图片/ err.png）;
 

解决方案

我复制的字符串的base64提示符窗口。我用AJAX方法从发布客户端中的Base64字符串，它为我的作品

C＃

  [HttpPost]
    公共无效Base64ToImage（字符串源）
    {
        串的base64 = source.Substring（source.IndexOf（，）+ 1）;
        的base64 = base64.Trim（'\\ 0'）;
        字节[] = chartData Convert.FromBase64String的（Base64）;
}
 

AJAX方法

  VAR照片= jqplotToImg（$（'＃ChartContent'））;
    //提示（，照片）;    $阿贾克斯（{类型：POST，
        网址：'../Report/Base64ToImage'，
        异步：假的，
        数据：{来源：图片}，
        成功：功能（数据）{
            //警报（数据）;
        }
    }）;
 

I am using MVC#. When i try To convert to base64 string to image, the image is not getting opened. I am getting base64 string from javascript and coverting that to image in controller. Here's my code.

var base64 = "data:image/png;base64,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...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";

byte[] str = System.Text.Encoding.Unicode.GetBytes(base64);
var buffer = Convert.FromBase64String(Convert.ToBase64String(str));
var file = Server.MapPath("~/Content/images/err.png");
System.IO.File.WriteAllBytes(file, buffer);
Image img = new Image();
img.ImageUrl = Server.MapPath("~/Content/images/err.png");

解决方案

I copied that base64 string prompt window. I used ajax method for posting the base64 string from client and it works for me

C#

[HttpPost]
    public void Base64ToImage(string source)
    {
        string base64 = source.Substring(source.IndexOf(',') + 1);
        base64 = base64.Trim('\0');
        byte[] chartData = Convert.FromBase64String(base64);
}

AJAX Method

var picture = jqplotToImg($('#ChartContent'));
    //prompt("", picture);

    $.ajax({ type: 'POST',
        url: '../Report/Base64ToImage',
        async: false,
        data: { source: picture },
        success: function (data) {
            //alert(data);
        }
    });

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