asp net mvc 默认图像显示

发布于 2024-10-17 14:46:14 字数 248 浏览 0 评论 0原文

如果用户没有图像，如何显示默认图像？现在，我显示如下：

<img alt="<%: Model.FullName %>" src="/Uploads/foto_<%: Model.StudentID %>.jpg" 
style="height: 125px; width: 125px" />

在某些情况下，如果上传文件夹中没有这张照片，我将无法获得图像，因此我需要默认图像。

原文

How can I display a default image if a user doesn't have an image? For now, I display like this:

<img alt="<%: Model.FullName %>" src="/Uploads/foto_<%: Model.StudentID %>.jpg" 
style="height: 125px; width: 125px" />

And in some cases if I don't have this photo in Uploads folder I don't get an image, so I need a default image.

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单挑你×的.吻 2024-10-24 14:46:14

在 .aspx 页面中使用以下代码

      <asp:Image ID="Image1" runat="server" Height="125px" Width="125px" onerror="this.onload = null; this.src='profimgs/default_l.jpg';"/>

在 .cs 页面中使用以下代码

Image1.ImageUrl = "D:\profimgs\orginalimg.jpg";

Use the below code in your .aspx page

      <asp:Image ID="Image1" runat="server" Height="125px" Width="125px" onerror="this.onload = null; this.src='profimgs/default_l.jpg';"/>

in your .cs page use the following

Image1.ImageUrl = "D:\profimgs\orginalimg.jpg";

回复收藏 0 原文

梓梦 2024-10-24 14:46:14

我会写一个 HTML 助手：

public static class HtmlExtensions
{
    public static MvcHtmlString StudentImage(this HtmlHelper<StudentViewModel> htmlHelper)
    {
        var model = htmlHelper.ViewData.Model;
        var relativeImagePath = "~/uploads/foto_" + model.StudentID + ".jpg";
        var imagePath = htmlHelper.ViewContext.HttpContext.Server.MapPath(relativeImagePath);
        var image = new TagBuilder("img");
        var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext);
        image.Attributes["src"] = urlHelper.Content("~/uploads/some_generic_image.jpg");
        image.Attributes["alt"] = model.FullName;
        image.Attributes["style"] = "height: 125px; width: 125px";
        if (File.Exists(imagePath))
        {
            image.Attributes["src"] = urlHelper.Content(relativeImagePath);
        }
        return MvcHtmlString.Create(image.ToString());
    }
}

然后在你看来简单地：

<%= Html.StudentImage() %>

I would write an HTML helper:

public static class HtmlExtensions
{
    public static MvcHtmlString StudentImage(this HtmlHelper<StudentViewModel> htmlHelper)
    {
        var model = htmlHelper.ViewData.Model;
        var relativeImagePath = "~/uploads/foto_" + model.StudentID + ".jpg";
        var imagePath = htmlHelper.ViewContext.HttpContext.Server.MapPath(relativeImagePath);
        var image = new TagBuilder("img");
        var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext);
        image.Attributes["src"] = urlHelper.Content("~/uploads/some_generic_image.jpg");
        image.Attributes["alt"] = model.FullName;
        image.Attributes["style"] = "height: 125px; width: 125px";
        if (File.Exists(imagePath))
        {
            image.Attributes["src"] = urlHelper.Content(relativeImagePath);
        }
        return MvcHtmlString.Create(image.ToString());
    }
}

and then in your view simply: