我怎么可以归纳传递到模型中的两个不同的选择？ [英] How can I SUM two different selections passed to model?

问题描述

我进一步采取了事先问题一步（见这个问题），我试图找出用户如何之两个（或更多）的选择使得有，例如，一个单选按钮列表。用户进行的选择是依赖于使用包含静态币值实体的if / else，如果语句。

这些都是实体价格：

  [数据类型（DataType.Currency）
[DisplayFormat（DataFormatString ={0：C}）]
公共小数priceProcessingStandard = 0;[数据类型（DataType.Currency）
[DisplayFormat（DataFormatString ={0：C}）]
公共小数priceProcessingExpedited = 250;[数据类型（DataType.Currency）
[DisplayFormat（DataFormatString ={0：C}）]
公共小数priceSubmissionOnline = 0;[数据类型（DataType.Currency）
[DisplayFormat（DataFormatString ={0：C}）]
公共小数priceSubmissionManual = 200;
 

所以，如果我有两套中的if / else，如果语句，如：

  @if（Model.ProcessingRadioButtons == Processing.Standard）
{
    @ Html.DisplayFor（M = GT; m.priceProcessingStandard）
}
否则，如果（Model.ProcessingRadioButtons == Processing.Expedited）
{
    @ Html.DisplayFor（M = GT; m.priceProcessingExpedited）
}
...
@if（Model.SubmissionRadioButtons == Submission.Online）
{
    @ Html.DisplayFor（M = GT; m.priceSubmissionOnline）
}
否则，如果（Model.SubmissionRadioButtons == Submission.Manual）
{
    @ Html.DisplayFor（M = GT; m.priceSubmissionManual）
}
 

和用户进行选择在两个单独的单选按钮，列表中的相应于 Processing.Expedited 和 Submission.Manual 中，code将分别显示 $ 250.00 和 $ 200.00 。

我不能，但是，弄清楚如何之这两个显示 $ 450.00 。请记住，我不知道前手的选择，这样算下来 priceProcessingExpedited + priceSubmissionManual 在函数中，然后调用它显然是不行的。另外，我做一下这些10-15，但我只用两个简单的那些为我所要完成的一个例子（这样的事实，另外两个选择是 $ 0.00包装，因为有不同的价格，我离开了其他选择）并不意味着什么。

任何指导？

更新：
根据答案的建议，我这样做：

  Model.calculated =
    Model.priceSolution +
    （（Model.ProcessingRadioButtons == Processing.Standard）？
    Model.priceProcessingStandard：
    （Model.ProcessingRadioButtons == Processing.Expedited）？
    Model.priceProcessingExpedited：
    Model.priceProcessingUrgent）;
 

一些注意事项：

1. priceSolution 是我作为一个基地使用静态值（它的基值加上用户选择）。


2. 我使用计算在视图模型和搞定;设置; ING它


3. 我离开了 Namespace.ViewModels.MyData 在处理。为简洁。


4. 我离开了提交为简单起见，因为它只是一个 + 那么同样的逻辑在处理。

解决方案

您只知道前手的选择考虑到你的 @if（Model.SubmissionRadioButtions == Submission.Online）反对目前由模型所保持的值进行测试 - 即使这仅仅是一个POST之后

。

因此​​，你应该建立在你的视图模型的属性也进行这些测试，总结相应的字段。

如果您不想显示该属性的 的自检之前，请属性返回一个空类型，敷用 @if视图（MySum.HasValue）{@ Html.DisplayFor（M = GT; m.MySum）}

I am taking a prior question one step further (see this question), I am trying to figure out how to sum two (or more) selections the user makes with, for example, a radio button list. The selection the user makes is tied to an entity that contains a static currency value using if/else if statements.

These are the entities for price:

[DataType(DataType.Currency)]
[DisplayFormat(DataFormatString = "{0:c}")]
public decimal priceProcessingStandard = 0;

[DataType(DataType.Currency)]
[DisplayFormat(DataFormatString = "{0:c}")]
public decimal priceProcessingExpedited = 250;

[DataType(DataType.Currency)]
[DisplayFormat(DataFormatString = "{0:c}")]
public decimal priceSubmissionOnline = 0;

[DataType(DataType.Currency)]
[DisplayFormat(DataFormatString = "{0:c}")]
public decimal priceSubmissionManual = 200;

So, if I have two sets of if/else if statements such as:

@if (Model.ProcessingRadioButtons == Processing.Standard)
{
    @Html.DisplayFor(m => m.priceProcessingStandard)
}
else if (Model.ProcessingRadioButtons == Processing.Expedited)
{
    @Html.DisplayFor(m => m.priceProcessingExpedited)
}
...
@if (Model.SubmissionRadioButtons == Submission.Online)
{
    @Html.DisplayFor(m => m.priceSubmissionOnline)
}
else if (Model.SubmissionRadioButtons == Submission.Manual)
{
    @Html.DisplayFor(m => m.priceSubmissionManual)
}

and the user makes selections in the two separate radio button lists corresponding to Processing.Expedited and Submission.Manual, the code will respectively display $250.00 and $200.00.

I cannot, however, figure out how to sum those two to display $450.00. Bear in mind, I do not know the selections before hand, so doing priceProcessingExpedited + priceSubmissionManual in a function and then calling it will obviously not work. Also, I am doing about 10-15 of these but I only used two simple ones as an example of what I am trying to accomplish (so the fact that the other two choices are $0.00 doesn't mean anything because there are varying prices for other choices that I left out).

Any guidance?

UPDATE: Based on suggestion in answer, I am doing this:

Model.calculated =
    Model.priceSolution +
    ((Model.ProcessingRadioButtons == Processing.Standard) ?
    Model.priceProcessingStandard :
    (Model.ProcessingRadioButtons == Processing.Expedited) ?
    Model.priceProcessingExpedited :
    Model.priceProcessingUrgent);

Some notes:

1. priceSolution is a static value that I use as a base (it's the base value plus the user selections).
2. I am using calculated in the ViewModel and get; set;'ing it.
3. I left out the Namespace.ViewModels.MyData before Processing. for brevity.
4. I left out Submission for brevity as it's just a + then the same logic as in Processing.

解决方案

You do know the selections before hand considering your @if (Model.SubmissionRadioButtions == Submission.Online) is a test against values currently held by the model - even if this is only after a POST.

As such, you should create a property in your view model that also performs these tests and sums the appropriate fields.

If you don't want this property displayed before the POST, make the property return a nullable type and wrap the view with @if(MySum.HasValue) { @Html.DisplayFor(m=>m.MySum) }

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