图像渲染问题

本文介绍了图像渲染问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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"); }