如何在ASP的img控件中显示的图像？ [英] How to display image in img ASP control?

问题描述

我想的img控件来显示图像。

I want to display image in img control.

天冬氨酸code：

<asp:Image id="id" src='<%# Eval("Item.SmallPicPath") %>' Runat="Server" >

C＃code：

C# code:

      public void Page_Load(Object sender, EventArgs e) 
{ 
   Glasses item=GetItemByID(GlassesID)    //retrive record from data base
} 

眼镜是具有类属性SmallPicPath。

Glasses is a class that have property SmallPicPath.

我试图显示图像，但我得到错误的任何想法如何解决它？

I try to display image but i get error any idea how to fix it?

感谢你在前进！

推荐答案

您正在尝试使用的方法是基于数据绑定，这通常不利于单个图像。

The approach you're trying to use is based on databinding, which generally isn't good for a single image.

相反，尝试这样的标记：

Instead, try something like this markup:

<asp:Image id="MyImageId" runat="server">

然后，在你的code背后：

Then, in your code behind:

public void Page_Load(Object sender, EventArgs e) 
{ 
    Glasses item = GetItemByID(GlassesID);    //retrive record from data base
    this.MyImageId.ImageUrl = item.SmallPicPath;
}

如果你仍然想使用数据绑定出于某种原因，这样的事情应该工作（尽管相比其他方法的性能开销）：

If you still want to use databinding for some reason, something like this should work (although there's a performance cost compared to the other approach):

<asp:Image id="MyImageId" runat="server" ImageUrl="<%# item.SmallPicPath %>">

code-背后：

Code-behind:

public Glasses item;

public void Page_Load(Object sender, EventArgs e) 
{ 
    this.item = GetItemByID(GlassesID);    //retrive record from data base
    this.MyImageId.DataBind();
}

数据绑定是可选操作;您需要调用的DataBind（）上的控制（或其母公司）来做到这一点。

Databinding is an optional operation; you need to call DataBind() on the control (or its parent) to make it happen.

您只需要的eval（），在涉及数据容器的情况下（通常是通过数据源） - 此一个没有

You only need "Eval()" in cases that involve a data container (usually via a DataSource) -- which this one doesn't.

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