MVC3剃刀的ViewData [英] MVC3 Razor ViewData

问题描述

我有一个在线的形式。例如，它要求名字和姓氏。当他们提交我把它们发送到其他视图。第二个观点有几个文本框（密码，电子邮件地址，用户名），它也有名字和姓氏虽然。如果他们填写的第一个表单，并在名字/姓氏我想第二个形式，因为它们已经在一个充满显示这些填充值。

I have an online form. for example it asks for first name and last name. When they submit I send them to another view. this second view has a few more textboxes (password, email address, username) it also has first name and last name though. If they fill out the first form and fill in firstname/lastname i want the second form to display these values since they have already been filled in.

在第一种形式，我把所有的填写信息到TempData的[项]

in the first form I am putting all the filled out information into TempData["entry"]

在第二种形式我这样做检查。

in the second form i am doing this check.

        if (TempData["entry"] != null)
        {
            var _model = (AccountInformationModel)TempData["entry"];

            ViewData["_firstName"] = _model.NameFirst;
            ViewData["_lastName"] = _model.NameLast;
        }

        return View("Register");

我想在我看来，我是一个有点困惑如何在一个文本框显示此数据上。我有这个在我看来，但它似乎没有奏效。

i guess in my view im a bit confused on how to display this data in a textbox. I have this in my view but it doesnt seem to be working.

       <div class="editor-label">
            @Html.LabelFor(m => m.FirstName)
        </div>
        <div class="editor-field">
            @Html.TextBox("FirstName", ViewData["FirstName"])
            @Html.ValidationMessageFor(m => m.FirstName)
        </div>

显然这行...

clearly the line that says...

   @Html.TextBox("FirstName", ViewData["FirstName"])

不工作..

推荐答案

您正在将数值为_FirstName

You're assigning the value to "_firstName"

ViewData["_firstName"] = _model.NameFirst;

，然后试图以显示名字

And then trying to display "FirstName"

@Html.TextBox("FirstName", ViewData["FirstName"])

试着将其更改为：

Try changing it to:

@Html.TextBox("FirstName", ViewData["_firstName"])

其他的方式做到这一点，以避免类似的失误是定义一个新的类，它包含所有视图数据键。这种方式的字符串被包含在一个位置，使得维护和变化更容易。

The other way to do this to avoid mistakes like this is to define a new class that will contain all your view data keys. This way your strings are contained in one location, making maintenance and changes easier.

public static class ViewDataKeys
{
    public const string FirstName = "_firstName";
}

然后，当你要访问它，你可以使用

Then when you want to access it, you can use

ViewData[ViewDataKeys.FirstName] = _model.NameFirst;

这篇关于MVC3剃刀的ViewData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！