图像渲染问题 [英] Image rendering issue

问题描述

大家好，



我有一个代码可以根据表格中的数据生成图像。它在我的本地系统上运行正常。当我在生产中部署它时我得到没有错误但图像也没有显示



下面是生成图像的代码片段。你能指导一下可能出现的问题。





//更改响应标题以输出JPEG图像。

 this.Response.Clear（）; 
 this.Response.ContentType =image / jpeg; 
 System.Drawing.Image OC = null; 
 //构建图像
 string imageName = Request.QueryString [ID]; 
 
 if（Cache [imageName]！= null）
 {
 OC =（System.Drawing.Image）Cache [imageName]; 
 //以JPEG格式将图像写入响应流。 
 OC.Save（this.Response.OutputStream，ImageFormat.Jpeg）; 
 OC.Dispose（）; 
} 

解决方案

可能是因为未达到IF条件，请在else块中加入一些代码。示例：

  else  { this  .Response.Write（ 错误）; } 

Hi All,

I have a code which genrates an image based on data in table. It works fine on my Local system. When i deploy it on production i get no error but the image also is not getting displayed

Below is the code snippet which generates an image. Can you please guide me what can be the issue.


// Change the response headers to output a JPEG image.

this.Response.Clear();
            this.Response.ContentType = "image/jpeg";
            System.Drawing.Image OC = null;
            //Build the image 
            string imageName = Request.QueryString["ID"];

            if (Cache[imageName] != null)
            {
                OC = (System.Drawing.Image)Cache[imageName];
                // Write the image to the response stream in JPEG format.
                OC.Save(this.Response.OutputStream, ImageFormat.Jpeg);
                OC.Dispose();
            }

解决方案

It could be that the IF condition is not reached, please put some code in the else block too. Example:

else {this.Response.Write("Error"); }

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