从自定义模型绑定器的controllerContext中获取FormCollection

发布于 2024-08-06 07:03:17 字数 167 浏览 8 评论 0原文

我有一个很好的函数来获取我的 FormCollection（从控制器提供）。现在我想做一个模型绑定，并让我的模型绑定器调用该函数，它需要 FormCollection。由于某种原因我能找到它。我以为会是这样 controllerContext.HttpContext.Request.Form

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↘人皮目录ツ 2024-08-13 07:03:17

试试这个：

var formCollection = new FormCollection(controllerContext.HttpContext.Request.Form)

FormCollection 是我们添加到 ASP.NET MVC 中的一种类型，它有自己的 ModelBinder。您可以查看 FormCollectionBinderAttribute 的代码来了解我的意思。

Try this:

var formCollection = new FormCollection(controllerContext.HttpContext.Request.Form)

FormCollection is a type we added to ASP.NET MVC that has its own ModelBinder. You can look at the code for FormCollectionBinderAttribute to see what I mean.

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孤独陪着我 2024-08-13 07:03:17

直接访问表单集合似乎是不受欢迎的。以下是来自 MVC4 项目的示例，其中我有一个自定义 Razor EditorTemplate，它在单独的表单字段中捕获日期和时间。自定义绑定器检索各个字段的值并将它们组合成一个DateTime。

public class DateTimeModelBinder : DefaultModelBinder
{
    private static readonly string DATE = "Date";
    private static readonly string TIME = "Time";
    private static readonly string DATE_TIME_FORMAT = "dd/MM/yyyy HH:mm";
    public DateTimeModelBinder() { }

    public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        if (bindingContext == null) throw new ArgumentNullException("bindingContext");

        var provider = new FormValueProvider(controllerContext);
        var keys = provider.GetKeysFromPrefix(bindingContext.ModelName);
        if (keys.Count == 2 && keys.ContainsKey(DATE) && keys.ContainsKey(TIME))
        {
            var date = provider.GetValue(string.Format("{0}.{1}", bindingContext.ModelName, DATE)).AttemptedValue;
            var time = provider.GetValue(string.Format("{0}.{1}", bindingContext.ModelName, TIME)).AttemptedValue;
            if (!string.IsNullOrWhiteSpace(date) && !string.IsNullOrWhiteSpace(time))
            {
                DateTime dt;
                if (DateTime.TryParseExact(string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0} {1}", date, time),
                                            DATE_TIME_FORMAT,
                                            System.Globalization.CultureInfo.CurrentCulture,
                                            System.Globalization.DateTimeStyles.AssumeLocal,
                                            out dt))
                    return dt;
            }
        }

        return base.BindModel(controllerContext, bindingContext);
    }
}

Accessing the form collection directly appears to be frowned on. The following is an example from an MVC4 project where I have a custom Razor EditorTemplate that captures the date and time in separate form fields. The custom binder retrieves the values of the individual fields and combines them into a DateTime.

public class DateTimeModelBinder : DefaultModelBinder
{
    private static readonly string DATE = "Date";
    private static readonly string TIME = "Time";
    private static readonly string DATE_TIME_FORMAT = "dd/MM/yyyy HH:mm";
    public DateTimeModelBinder() { }

    public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        if (bindingContext == null) throw new ArgumentNullException("bindingContext");

        var provider = new FormValueProvider(controllerContext);
        var keys = provider.GetKeysFromPrefix(bindingContext.ModelName);
        if (keys.Count == 2 && keys.ContainsKey(DATE) && keys.ContainsKey(TIME))
        {
            var date = provider.GetValue(string.Format("{0}.{1}", bindingContext.ModelName, DATE)).AttemptedValue;
            var time = provider.GetValue(string.Format("{0}.{1}", bindingContext.ModelName, TIME)).AttemptedValue;
            if (!string.IsNullOrWhiteSpace(date) && !string.IsNullOrWhiteSpace(time))
            {
                DateTime dt;
                if (DateTime.TryParseExact(string.Format(System.Globalization.CultureInfo.CurrentCulture, "{0} {1}", date, time),
                                            DATE_TIME_FORMAT,
                                            System.Globalization.CultureInfo.CurrentCulture,
                                            System.Globalization.DateTimeStyles.AssumeLocal,
                                            out dt))
                    return dt;
            }
        }

        return base.BindModel(controllerContext, bindingContext);
    }
}

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