Carpool Project: Part #10

I went back to the update of the Carpool Controller and changed the view to include the Driver like so:

I then updated the driverId to see if the changes propagate. The new value is in the form collection:

But after running UpdateView(), the new value is dropped.

Apparently, only the top-level properities are affected by UpdateView? Ugh – between the date/time conflict the nested properties, UpdateView only is useful for the most basic scenarios. I’ll replace UpdateView with a method that I write.

I thought about using Reflection like so (this is not right):

 1         private void UpdateCarpoolFromFormCollection(Carpool.Domain.Carpool carpool, FormCollection collection)
 2         {
 3 
 4             PropertyInfo[] propertyInfos = carpool.GetType().GetProperties();
 5             foreach (PropertyInfo propertyInfo in propertyInfos)
 6             {
 7                 for (int i = 0; i < collection.Count; i++)
 8                 {
 9                     if (propertyInfo.Name == collection[i].ToString())
10                     {
11                         propertyInfo.SetValue(carpool,collection[i],null);
12                     }
13                 }
14             }
15 
16         }
17  

I realized I really don’t understand the FormCollection object and how to enumation (or write some LINQ) to pull the correct value out of it. I then realized that I am being stupid. Of course the MVC creators would allow for next properities. I wrote a quick hello world app and sure enough, the changes are coming down:

The difference is the “.”. In my carpool solution, the Carpool.Drver is somehow turning into CarpoolDriver:

Changing this

1             <div class="editor-label">
2                 <%: Html.LabelFor(model => model.Driver.Id) %>
3             </div>
4             <div class="editor-field">
5                 <%= Html.TextBox("carpoolDriverId", Model.Driver.Id)%>
6                 <%: Html.ValidationMessageFor(model => Model.Driver.Id)%>
7             </div>
8  

1 
2             <div class="editor-label">
3                 <%: Html.LabelFor(model => model.Driver.Id) %>
4             </div>
5             <div class="editor-field">
6                 <%: Html.TextBoxFor(model => model.Driver.Id)%>
7                 <%: Html.ValidationMessageFor(model => model.Driver.Id)%>
8             </div>
9  

And boom goes the dynamite…