如何将字节数组转换为图像？ [英] How to convert a byte array into an image?

问题描述

使用Javascript，我正在对WCF服务进行AJAX调用，并且它正在返回字节数组。如何将其转换为图像并显示在网页上？

Using Javascript, I'm making an AJAX call to a WCF service, and it is returning a byte array. How can I convert that to an image and display it on the web page?

推荐答案

我意识到这是一个旧线程，但是我设法通过Web服务上的AJAX调用来做到这一点，并认为我会分享...

I realize this is an old thread, but I managed to do this through an AJAX call on a web service and thought I'd share...

• 我有一个我页面中的图片已经：

• I have an image in my page already:

 <img id="ItemPreview" src="" />

AJAX：

AJAX:

$.ajax({
        type: 'POST',
        contentType: 'application/json; charset=utf-8',
        dataType: 'json',
        timeout: 10000,
        url: 'Common.asmx/GetItemPreview',
        data: '{"id":"' + document.getElementById("AwardDropDown").value + '"}',
        success: function (data) {
            if (data.d != null) {
                var results = jQuery.parseJSON(data.d);
                for (var key in results) {
                    //the results is a base64 string.  convert it to an image and assign as 'src'
                    document.getElementById("ItemPreview").src = "data:image/png;base64," + results[key];
                }
            }
        }
    });

我的 GetItemPreview代码查询SQL服务器我将图像存储为base64字符串，并将该字段作为结果返回：

My 'GetItemPreview' code queries a SQL server where I have an image stored as a base64 string and returns that field as the 'results':

     string itemPreview = DB.ExecuteScalar(String.Format("SELECT [avatarImage] FROM [avatar_item_template] WHERE [id] = {0}", DB.Sanitize(id)));
     results.Add("Success", itemPreview);
     return json.Serialize(results);

此行的AJAX调用具有魔力：

The magic is in the AJAX call at this line:

     document.getElementById("ItemPreview").src = "data:image/png;base64," + results[key];

享受！

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