图像绑定mvc actionresult剃刀视图 [英] Image binding mvc actionresult razor view

问题描述

大家好我绑定img标签如下

Hi all I am binding the img tag as follows

<img alt="" src='@Url.Action("UserImage", "Home")' class="avatar img-circle img-thumbnail" /> 

这是我从数据库中获取图像的代码

This is my code to get the image from the database

[HttpGet]  
public ActionResult UserImage()  
{  
string user = Session["UserName"] as string;  
byte[] photo = null;  
var v = db.table.Where(p => p.USER_NAME == user).Select(img => img.PHOTO).FirstOrDefault();  
if (v != null)  
{  
photo = v;  
return File(photo, "image/jpeg");  
}  
else  
return null;  
}  

当我在数据库中时显示图像但是当它为空时它显示如下，而不是我需要用空绑定src标签



http： //i.stack.imgur.com/rFPU0.png [ ^ ]



我尝试过：

This is displaying image when I have in the database but when it is null it is displaying as follows, instead of that i need to bind src tag with empty

http://i.stack.imgur.com/rFPU0.png[^]

What I have tried:

[HttpGet]  
public ActionResult UserImage()  
{  
string user = Session["UserName"] as string;  
byte[] photo = null;  
var v = db.table.Where(p => p.USER_NAME == user).Select(img => img.PHOTO).FirstOrDefault();  
if (v != null)  
{  
photo = v;  
return File(photo, "image/jpeg");  
}  
else  
return null;  
}  

推荐答案

你必须为noimage情况返回另一张图片。有一张漂亮的照片，显示没有可用的图像，并在没有找到图像时返回它

You have to return another image for noimage situation. Have a nice photo that show no image available and return it when no image found

找到一个空白图像（.jpg）并将其存储在一个文件夹中。如果数据库中有空值，则将空白图像转换为字节数组并将其发送到客户端。

Find a blank image(.jpg) and store it in a folder. When you have null value in your Database then convert the blank image to byte array and send it to client.

byte[] testbyte = System.IO.File.ReadAllBytes("filepath");
if (v != null)  
{  
    photo = testbyte;
    return File(photo, "image/jpeg");
}

而不是显示错误的图像，您可以显示空白图像，表示图像不可用。

Instead of showing wrong image you can show blank image which will represent image is not available.

这篇关于图像绑定mvc actionresult剃刀视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！