ASP.Net MVC - 如何在html标签内显示视图模型中的字符串？

Question

<span class="text-danger">
@{
    if (Model.uploadErrorMessage != null)
    {
        if (!string.IsNullOrEmpty(Model.uploadErrorMessage))
        {
            Model.uploadErrorMessage;
        }
    }
}
</span>

Given code above, how do I display Model.uploadErrorMessage inside <span> tag?

Currently it give me this error on Model.uploadErrorMessage :

Only assignment, call, increment, decrement, and new object expressions can be used as a statement

Answer 1

无论如何，所有这些if语句都是完全不必要的，你可以将整个事情简化为：

<span class="text-danger">@Model.uploadErrorMessage</span>

Answer 2

Put your span tag inside if statement

@{
    if (Model.uploadErrorMessage != null)
    {
        if (!string.IsNullOrEmpty(Model.uploadErrorMessage))
        {
            <span class="text-danger">@Model.uploadErrorMessage</span>
        }
    }
}

Answer 3

use the "@"-symbol to write your variable value to the view:

for example:

<span>This is the error: @(Model.uploadErrorMessage)</span>

Answer 4

@Html.Raw(Model.uploadErrorMessage)

you can simply put @Model.uploadErrorMessage

Edit: XSS vulnerability fix, based on @DavidG's comment.